US3195764A

US3195764A - Receptacle and opening means therefor

Info

Publication number: US3195764A
Application number: US165730A
Authority: US
Inventors: Fried Louis; D Andrea Angelo Ralph
Original assignee: Individual
Current assignee: Individual
Priority date: 1962-01-10
Filing date: 1962-01-10
Publication date: 1965-07-20
Anticipated expiration: 1982-07-20

Description

July 20, 1965 L. FRIED ETAL 3,1 ,7

RECEPTAGLE AND OPENING MEANS THEREFOR Original Filed Nov. 10, 1960 I 5 Sheets-Sheet 1 IN'VEN TURJ Lows F ned BY Angelo Ralph O'Andreo-- July 20, 1965 FRIED ETAL RECEPI'ACLE AND OPENING MEANS THEREFOR 5 Sheets-Sheet 2 Original Filed Nov. 10, 1960 INVENT Loui Fri BY Angelo RolphD Andrea JMbnm arvy:

July 20, 1965 L. FRIED ETAL 4 RECEPTACLE AND OPENING MEANS THEREFOR I Original Filed Nov. 10, 1960 5 Sheets-Sheet 5 FIG. 11.

I37 I24 ue A I E 126 i we Louis Fried Angelo Ralph D'Andreu ATTORNEYS July 20, 1965 L. FRlED ETAL 3,195,764

RECEPTACLE AND OPENING MEANS THEREFOR Original Filed Nov. 10, 1960 5 Sheets-Sheet 4 FIG. 17.

F|G 2 INVENTORS Louis Fried BY Angelo Ralph D'Andreo ATTORN EYS July 0, 1965 FRIED ETAL 3,195,764

REGEPTAGLE AND OPENING MEANS THEREFOR Original Filed Nov. 10, 1960 INYENTORS Lou+s- Frhlgd 245 BY Angelo Ralph Dlfindreo A T TORNEYS 5 Sheets-Sheet 5 FIG.22. FIG. 25.

United States Patent 0 3,195,764 RECEPTACLE AND 'GPENING MEANS THEREFOR Louis Fried, 67 Munn Ave, East Orange, N..ll., and

Angelo Ralph DAndrea, 6357 Greene St, Philadelphia,

Pa. Continuation of application Ser. No. 79, 62, Nov. 14 1969. This application Jan. 10, 1962, Ser. No. 165,736

35 Claims. '(Cl. 220-54) The present application is a continuation of our copending application Ser. No. 70,902, filed November 10, 1960, for Receptacle and Opening Means Therefor" and which application was :a continuation of application Ser. No. 633,771, filed January 11, 1957, and co-pending application Ser. No. 781,023, filed December 17, 1958, for Receptacle and Combined Quick Opening Means.

This invention relates to the class of receptacles.

While the invention of this application is applicable to an infinite variety of receptacles of any size or shape and constructed from metal or fiberboard lined with metal, plastic, or any other suitable material, it is particularly and primarily designed for or applicable to receptacles of metal or other materials suitable for merchandising fluent commodities, either dry or liquid or semi-solid or semi-fluid materials, as, for example, canned fruits or vegetables where solid particles and liquid may be together.

In the art of metallic receptacles, a number of different ways have been heretofore devised for ellecting the opening of the same and such ways of opening have also had as a particular object to effect the opening operation quickly and easily. The different Ways heretofore devised for opening metallic receptacles embody the use of devices such as keys which are employed for removing tear strips, or metal cutting instruments for cutting away a .portion of the wall of the receptacle to provide an opening therein through which the contents may be discharged. In those devices for effecting the opening of a can or other type of receptacle where a tear strip is provided for the use of a key to efiect its removal from the wall of the receptacle, various types of construction have been resorted to to avoid the formation of a raw metal edge which might present a hazard to the user and one such type of construction involves the special formation of the wall which provides a lip or smooth-edge portion with which the removed top portion of the receptacle, functioning as a lid or cover, can be engaged to keep the receptacle closed after some of the contents have been removed as, for example, in the well-known coffee can construction. However, this latter construction involves operations in the construction of the can which materially increase the cost of production.

In the light of the foregoing, one object of the present invention is to provide a can or other receptacle wherein means are provided for opening the same with a mini mum of eifort and at the same time form a large opening through which the contents of the receptacle can "be readily dispensed.

In the use of cutting and punching openers, Where some form of metal cutting implement is employed, only a small portion or section of the receptacle wall is cut away or removed and while this may provide a ,sufiicient opening or dispensing liquid material from the receptacle, such an opening is not or may not be satisfactory or suitable for dispensing heavy or thick commodities or those commodities in which there are large pieces of material, such as vegetables and the like.

Also, in the use of cutting or punching openers, where some form of metal cutting implement is employed during the operation of cutting and punching an opening in the metal wall of the receptacle or container, metal particles 3,l95,7fi4 Patented July 20, 1965 which may be released as a result of the cutting or punching operation fall into the contents of the container or receptacle and these particles, being almost microscopic in size, become immersed in the contents and, in the case of food or other edible material, becoming mixed with the material are consumed by the user. This is a very dangerous situation since these small metal particles may seriously affect the health of the consumer.

Accordingly, another object of the present invention is to provide a receptacle or receptacle wall which is constructed in a new manner whereby all or a substantial portion of the wall may be completely removed without the necessity of employing a key, cutters, or other similar mechanical opening devices.

Another object of the invention is to provide a receptacle having a means whereby substantially the entire end wall of the receptacle can be removed easily and quickly so that no difliculty will be encountered in removing the contents of the receptacle even though the same may include large bodies.

Still another object of the invention is to provide a new receptacle structure wherein a wall thereof is formed in a novel manner whereby a substantial portion of such wall may be easily and quickly removed by one quick motion or jerk applied to a tongue or finger piece carried by the wall and grasped with the fingers of a hand. Such tongue or finger piece may constitute an integral part of the removable Wall portion, stamped or otherwise cut therefrom or it may consist of a separate piece of material applied to such wall portion and secured thereto in a suitable manner as by spot-welding or the like.

The invention, by which the various objects are attained, contemplates the provision in a receptacle in the form of a can or the like and constructed of metal or other suitable material wherein a substantial portion of a wall is formed all in one piece with a grasping means by which to apply a pull thereto and wherein such wall portion is delineated for separation from a surrounding part of the wall by a cut or slit in such manner that when a pull is applied to the grasping means, the Wall portion so delineated will come out cleanly and without leaving raw, exposed, or rough edges and, by reason of such clean separation from the encircling or surrounding wall part, the possibility of metal particles being separated from the wall and entering the contents of the receptacle is eliminated.

A further object of the invention is to provide an improved receptacle structure in the form of a can wherein an end wall is partially cut through and partially scored along a line defining the portion of the wall to be removed, with a tongue member attached to the portion so defined and having a prescribed relationship to the defining cut so that, upon the grasping of the tongue between the fingers and the application thereto of a quick pull outward or a quick jerk, the cut portion of the wall will be bent out and a force will be applied on opposite sides of the cut to elfect the easy and rapid tearing of the material of the wall along the score lines to permit the entire wall portion to be removed and the invention further embodies the inclusion of an auxiliary wall sheet or membrane lining the underside of the removable wall portion in such a manner as to prevent the leakage of the contents of the receptacle through the cut portion of the wall, such auxiliary wall sheet being thin and easily ruptured or cut away after the outside or covering Wall portion is removed. Such lining sheet or membrane may be in the form of a metallic foil such as aluminum or the like or it may take the form of a suitable plastic.

The invention further contemplates the provision of a wall structure having a portion thereof designed to be fully or completely removed from a surrounding part and wherein such complete removal of the Wall portion is PM! facilitated by outlining or defining the removable portion by a line of weakness which may be in the form of a number of slits in the wall separated one from the other by integral portions joining the removable portion of the wall to the outside surrounding portion or such line of weakness may be in the form of a single slit and a continuous weakening score line, with a pull tab fixed to the Wall and having an end terminating adjacent to the slit whereby, upon application of an outward pull to the tab, the portion of the wall to be removed will first be bent outwardly along the slit and then the Wall will be torn away along the score line or through the integral portions joining it to the part of the receptacle wall lying outside of the removable portion.

It is also an object of the invention to provide an improved receptacle or container construction of the character described and having a portion of the wall thereof removable in the manner described and wherein the end wall is adapted to be shaped, as by stamping or the like, from a single piece of metal in such a way that it is capable of being stacked so as to be fed from a conventional feeding magazine of a can-closing or lidding machine.

It is also an object to provide an end wall structure of the. character stated wherein the metal of the wall which joins the removable portion to the surrounding outside portion, will be torn or separated from the surrounding outside portion, in close proximity to the rim of the can and. removed with a minimum of effort to give access to the underlying or auxiliary thin protective sheet of metal foil, such as aluminum or the like or of a suitable plastic, which is adapted to be easily broken or cut out.

1 The invention will be best understood from a considerationof the following detailed description taken in connection with the accompanying drawings forming a part of the specification, wherein;

' FIGURE 1 is a view in perspective of a conventional metal can showing one end wall thereof constructed in accordance with one embodiment of thepresent invention.

FIGURE 2 is a view in perspective of the construction shown in FIGURE 1 and illustrating the first step in the process of removing the detachable portion of the wall.

FIGURE 3 is a view illustrating in perspective a further stage in the process of removing the wall portion and showing the wall portion partly detached.

FIGURE 4 is a perspective exploded view showing the detachable portion of the wall completely separated and illustrating the interior frangible lining which covers the inner side of the entire wall.

' FIGURE 5 is a transverse section taken substantially on the line 5-5 of FIGURE 1, the figure being on an enlargedscale. a

FIGURE 6 is a view in top plan of the can wall per se, that is, before it is applied to a can body.

FIGURE 7 is a sectional view taken substantially on the line 7-7 of FIGURE 6 and on an enlarged scale, showing two of the can tops orend walls in nested relation.

FIGURE 8 is a view illustrating one way in which the removed portion or disk section of the end wall may be folded or bent into a form where it can be used as a cutting implement for breaking and cutting out the frangible liner.

FIGURE 9 illustrates the complete removal of the grasping tongue or tab, providing in the tab a cutting implement which may be used for removing the frangible liner.

FIGURE 10 is a reproduction of an actual micro-photograph of a transverse section through the seam between a lid and side wall of a can having a frangible foil liner secured against the underside of the lid in accordance with the present invention, the section having approximately 50 magnification.

FIGURE 11 is a view in top plan of a receptacle illustrating another method of forming the end wall whereby to accomplish the objects of the present invention, the end Wall here being formed with a double slit and score lines connecting the ends of the slits.

FIGURE 12 is a perspective View showing a receptacle in which the middle portion has been broken away, and showing the manner of grasping the pull tab or tongue after the latter has been bent up, preparatory to applying the necessary quick jerk or pull for eifecting the removal of the major portion of the end Wall.

FIGURE 13 is. a perspective view corresponding to the top portion of the receptacle shown in FIGURE 12 and illustrating the manner in which the removable portion of the wall is bent transversely in the tearing out thereof. FIGURE 14 is a sectional view on an enlarged scale taken substantially on the line 14-14 of FIGURE 11.

FIGURE 15 is a fragmentary section on an enlarged scale taken substantially on the line 15-15 of FIGURE 11.

FIGURE 16 is a perspective exploded view illustrating the removed end wall portion and showingn the underlying frangible liner sheet or auxiliary wall.

FIGURE 17 is a view in top plan corresponding to FIG- URE 11, but showing the top or end wall of the receptacle with a single slit and score line defining the removable portion of the wall.

FIGURE 18 is a view corresponding to FIGURE 12 showing the manner of tearing the end wall.

FIGURE 19 is a View corresponding to FIGURE 13 and showing the bending and partially torn wall illustrated in FIGURE 18.

FIGURE 20 is a sectional view on an enlarged scale taken substantially on the line 2020 of FIGURE 17.

FIGURE 21 is a view corresponding to FIGURE 16 and showing the completely removed end wall portion and the inner frangible lining wall.

FIGURE 22 is a view in top plan of a receptacle showing the tab which is to be grasped by the fingers of the 22, but showing the use of a single slit in the end wall defining a. portion of the part to be removed and joining at its ends with a single continuous score line.

FIGURE 26 is a plan view illustrating another form and manner of attaching a pulling tab or tongue to the removable portion of the end wall.

FIGURE 27 is a sectional view corresponding to FIG.- URE 23 and illustrating the rivet means for securing the pulling tab or tongue to the removable portion of the end wall.

Referring now more particularly to the drawings, the present invention has been illustrated in association with a conventional cylindrical metal can of the type which may be used for merchandising various food products, which products maybe either completely liquid in character orsemi-solid or liquid with 'solid material therein. While the illustration is made of a cylindrical can and the following description will be directed to a can of the form shown, it is to be understood that the invention is not necessarily limited to application to a receptacle of this. character or to any specific type of receptacle but it will be obvious that the invention can be applied to receptacles of other form and may be used in association with receptacles carrying fluent dry, liquid, solid or frozen material.

.In addition to the foregoing, the construction of the receptacle in accordance with the invention is such that it may be used for merchandising carbonated liquids or s eaves liquids in which gases are dissolved and as a result of which the receptacle would be subjected to considerable internal pressure.

In addition to the construction enabling the receptacle to withstand internal pressure as stated, it has been found that a high degree of vacuum can be established within the receptacle without rupturing the liner or auxiliary wall sheet or membrane underlying the end wall. The construction illustrated has been found to withstand a vacuum or reduced pressure within the receptacle of 16", which is the highest commercial vacuum obtainable and is considerably more than that to be found in the socalled vacuum packed receptacles.

The description will first be directed to the novel features of the invention as embodied in FIGS. 1 to 10, inclusive, of the drawings. In these figures, the numeral generally designates a can type of receptacle wherein the cylindrical side wall is designated 12 and one end wall is generally designated 14. The other or opposite end wall, which is generally designated 16, is constructed in accordance with the present invention, the detailed description of which follows:

In accordance with the invention, the readily openable wall 16 is pressed as an integral one-piece unit from a sheet of metal or other suitable material and in desired size as, for example, a disk 13, when the wall unit is to be applied to the end of a can. This disk is shaped to provide the central circular plate or head portion 20 which is encircled by the peripheral Wall 21 and this wall merges with an outwardly extending relatively wide flange 22, reference now being had to FIGS. 6 and 7, where the wall unit is shown as prepared ready for application to an end of a can body. This peripheral flange 22 terminates in the downwardly and inwardly turned encircling lip 23.

The central removable or detachable part or portion is connected by a rupturable connection to a marginal portion of the can top. This central removable or detachable part or portion which has been referred to as the head or plate 20, is cut through on a circular line in close proximity to the encircling wall portion 21, this circular out line being interrupted or divided into a series of ar cuate parts or sections each of which is designated 24. These parts 24 are in the form of weakened delineations or very fine slits, the edges of which lie close together or substantially in contact, but the material is cut entirely through in the arcuate parts or portions which the numeral 24 designates. The ends of these arcuate portions or slits are closely spaced to one another and there are thus provided the narrow uncut or unbroken joining portions or tongues 25 which maintain the complete onepiece form of the wall unit and the width of each tongue being materially less than the length of each one of said slits.

In the present illustration of the disk form of the wall, the integral or uncut portions of the metal between the central removable part or portion 20 and the outer marginal part or portion which is permanently fastened to the edge of the can wall 12, have been shown as six in number, but while this number of connections is preferred, it is to be understood that the invention is not to be limited in this respect as the number of connections may be selected in accordance with the weight or character of the metal or metallic covered fiberboard or other material used in accordance with the size or shape of the receptacle or container so that the relatively easy removal of the central part 25 can be effected when the desired pull is applied thereto.

Also the interrupted circular out line made up of the portions 24 has been illustrated as lying close in to the angle 21 between the removable part 20 and the encircling wall 21. While this positionin of the slit portions or interrupted circular out line is preferred, it is to be understood here also that the slits can be placed farther out from the Wall 21 into a marginal portion of the said head portion 2%, if desired, without departing from the spirit of the invention. One advantage in placing the slit portions 24 close to the angle 21' will be apparent from the description hereinafter given.

In the shaping of the disk to form the can wall, there is also formed of bendable pull tab or tongue 26 which is provided to be grasped, lifted and pulled for effecting the breaking away and removal of the central part 20. This tab 26 is of a length slightly less than the radius of the circular removable part 21 and the free end of the tab is located at approximately the center of the removable part while the side edges thereof terminate at a suitable distance inwardly from the interrupted circular slit made up of the parts 24 to provide enough material to prevent the tongue or tab being torn out before the joining portions 25 are broken or ruptured. These portions of material lying between the ends of the side edges of the tab or tongue 26, or in other words, lying between the parallel cut lines 26 which define the sides of the tab or tongue, are designated 27. It is understood that the size or shape of the tab or tongue can be changed to fit the particular application as to size or shape of the receptable or container and it is obvious that the pull tab merely serves to enable one to pull the central portion 20 of the top off or away from the can and thus quite readily and effectively open the can. It will be noted that the central portion of the top 20 is defined by the circular line of the parts 24 and that the pull tab 26 has a portion thereof which may be denoted by the portion of the material substantially between or at the ends of the converging lead lines 27 in FIG. 6 and which in eifect is the position where-at the said pull tab is permanently fixed or joined to the central portion of the top 20 adjacent to the perimetrical portion thereof, viz., adjacent the perimeter of the central portion of the top 20. It will also be seen from FIG. 6 and the other figures of the drawing that the pull tab has a free portion which is directed inwardly toward a perimetrical portion of the top remote from the perimetrical portion to which the first mentioned portion of the tab is fixed or joined.

After the disk has been cut to form the tab or tongue 26, the tab is pressed to have a slight outward bow as indicated at 28. This raises the side edges 29 of the tab or tongue slightly above the surface of the removable central part 20 as shown in FIG. 1, while the free end of the tab is maintained in the plane of the part 20 and thus the end of the tab is protected so that it cannot catch accidentally on any object and be pulled out or" place while at the same time, by this slight bowing of the tab intermediate its ends, the side edges are raised to a sufficient extent to permit one to engage the nails of a thumb and forefinger under the sides of the tab so as to bend it outwardly to the necessary extent to permit grasping the tab between the thumb and forefinger in the manner indicated in broken lines in FIG. 2.

The inner or under side of the disk forming the end wall unit is covered by a sheet of any suitable frangible material such as aluminum foil or a plastic, which sheet of material is designated 30. The frangible sheet 30 extends over the full width of the disk and into the channel formed by the wall 21, the flange 22 and the lip 23. The under side of the flange 22 has a suitable layer of adhesive 31 applied thereto and the sheet of frangible material extends partly over or onto the layer of adhesive as indicated at 32 in FIG. 7 to be folded into the seam formed when the disk is joined to the end of the circular wall 12 of the can in the usual or conventional manner.

When the disk top is so applied, the can will be hermetically sealed by reason of the particular manner in which the adhesive and the peripheral portion of the frangible sheet are compressed and held in the formed seam.

As is conventional in connection with the application of tops or covers to receptacles and particularly in connection with the securing of tops to metal cans, the can wall is provided with an outstanding flange which enters figures, FIG. is a copy or reproduction of'an actual microphotograph of a section of the seam formed between the can wall and the lid of the can construction herein described. It will be seen that the part designated .22 in FIGS. 6 and 7 is bent or folded over and down and the lipdesignated 23 is turned inwardly and upwardly and is secured between the can wall 12 and the downwardly turned flange 12 of the wall; In this turning and folding operation which forms the seam, the metal foil forming the frangible sealing element is compressed between the upper end of the can wall 12 and the wall'portion 21 of the lid or top, as indicated at 30', and a portion of the periphery of the frangible sealing member extends over the top of the can wall and is squeezed and forced downwardly to a substantial degree between the outer side of the downturned flange 1'2 and the bent down portion 22. As shown in FIG. 10, this peripheral portion is drawn in this squeezing operation between the portions 12' and 22 to a tapered thickness as indicated at 319' and the edge terminates approximately half way down the height of the seam or of the downwardly turned portion 12' of the can flange. terial 31 is also compressed and squeezed down to fill the angle at 22 which is formed by the bending back or bending up of the lip 23 of the can lid so that this angle is completely filled with the sealing substance 31 and the sealing substance so distributed in the angle together with the compression and extension or elongation of the frangible material 30 results in the formation of a hermetic seal between the wall of the can and the applied lid.

In the operation of applying the lid which causes a drawing of the frangible sheet radially outwardly, compressing and squeezing it between the folded portions as described, it will be seen that the portion of the frangible sheetlying across the central part will be drawn tightly against the surface of such part and eifectively cover the l slits 24v and the slit forming or outlining the tongue 26 to effectively close these out portions of the lid.

The can lids or end walls are so constructed, as will be seen upon reference to FIG. 7, that they may be'stacked one upon another and thus fed from a magazine to the conventional closing machine. After the lid or wall 16 has been applied to the can body and sealed by rolling the flanges 22 and 12' with the lip 23 of the lid, the frangible protecting sheet 30 will lie fiat across the under side of the lid andthus prevent the escape of any of the liquid content of the can through the slit portions 24 or through the slit outlining the pull tab or tongue 26.

In the process of opening the can, the tab 26 is engaged at its raised or bowed side edges in the manner hereinbefore stated and when the free end has been lifted sufli ciently, it is grasped between the fingers as shown in FIG. 2 and then by applying a quick sharp outward pull to the tab, the connecting portions between the central part 20 and the wall 21 will be ripped or torn apart, as indicated at 25', so that the entire central portion 20 of the lid will come free, as illustrated in FIG. 4. This will expose the frangible liner sheet which protected the iuner'side of the removable portion and covered the slits in the manner described.

When the interrupted circular cut line made up of the several slits 24 is placed close to or directly in the angle or corner 21', after the part 20 has been torn loose, the exposed edge 34 of the metal will lie so close to the wall 21 that the possibility of the person opening the can The sealing or bonding ma- 7 receptacle or container, being cut thereon is reduced to a minimum.

The numeral 25" designates in'FIG. 4 the small points which remain after the tearing away of the metal in the portions 25. 7

After removing the central part 20, the protective frangible sheet can be easily ruptured and either torn out or cut away with any suitable implement. For example, the removed plate 20 may have the tongue torn away therefrom, leaving the very short rough edges 35, as shown in FIGS. 8 and 9. The plate 20 may then be folded on a radial line passing through the center of the opening from which the tab or tongue 26 has been removed and one of the points 36 thus obtained may be used to puncture the frangible sheet and cut it way around the edge 34. 1

In place of bending the plate portion 20 and using the points 36 to. cut away the foil, use may be made of one of the edge portions 37 of the tongue 26 Where the metal has been torn across the portions 27 in the operation of tearing the tongue away from the plate 20.

FIGS. 11 to 21 illustrate another embodiment of the invention in connection with the manner in which the portion of the receptacle wall, here illustrated as an end wall, is delineated or marked off by a slit and a score line or by slits and score lines for easy, quick and complete, clean detachment from the surrounding part of the wall structure. 1

This series of'figures is divided, for convenience of description, into two groups. The first group embodies FIGS. 11 to 16 and in these figures, the numeral generally designates a cylindrical receptacle or can, the body of which is designated 112 and one end is designated 114 and, as in the preceding described structure, is of'the usual disc form having its periphery joined to an end of the body wall 112 by conventional means such as a rolled seam or it may be joined in any other desired or suitable manner.

The numeral 116 generally designates the opposite end wall of the receptacle, constructed in accordance with the further embodiment of the invention. This end wall 116 embodies the flat disc-like central portion 118 which is joined to the wall 112 in the usual manner as by rolling or seaming the edge of the disc to the end of the wall as indicated at 120. This end wall 116 is pressed as an integral one-piece unit from a sheet of metal or other suitable material and in desired size and in the pressing operation, it is shaped to form the disc-like central piece or plate 113 encircled by the peripheral wall 122 which in the seaming operation attaching the end wall or head to the can body is interfolded as at 124 with an outwardly and downwardly folded peripheral portion 126 of the can wall 112 in the accepted or conventional manner.

The disc portion 118 which lies inside of and joins the encircling wall portion 122 is cut through on a circular line in close proximity to the wall portion 122, in two places. These two out portions or slits are designated 128 and 130 and are at diametrically opposite sides of the disc or head 118'and have only a short radial extent as compared with the intervening circular portions between their ends.

These

arcuate slits

128 and 130 extend equidistantly on opposite sides of a diametrical line which coincides with the section indicating line 1414. Between the adjacent ends of the two slits, the metal of the disc or head 118 is deeply scored as indicated at 131 in FIG. 15. These score lines 131 continue a circle of which the

slits

128 and 130 form parts, as is clearly illustrated in FIG. 11. In the operation of stamping the wall 116 to form the slits, the score lines and the flange portion 122, the disc body 118 is cut through to form a tongue or tab 132. This tongue 132 in the illustration of the embodiment of the invention under consideration is formed with the longitudinal side edges 133 which terminate in close proximity to the slit 128 as shown, while the inner end of g the tongue is formed with the rounded edge 134 which joins the side edges 133, as shown. Also, the tongue 132 is formed with its side edges 133 equidistantly spaced on opposite sides of the diametrical line hereinbefore referred to and bisecting the

slits

128 and 136.

In addition to the stamping of the central disc portion 18 of the end to form the tongue, the tongue itself is pressed so as to have a slight longitudinal bow 135 midway of its ends as is clearly shown in FIG. l4. This very slight longitudinal bow causes the side edges 133 of the tongue to lie slightly above the top of the disc portion 118 thereby making it easy for the person opening the can to grasp the tongue and bend it outwardly in the manner shown in FIG. 12.

The inner or under side of the end wall 116 is covered by a sheet of any suitable frangible material such as aluminum foil, plastic or the like and this sheet of material is designated 136. The sheet 136 is im-perforate and is initially of suilicient size that when it is placed against the under side of the end wall 116 or lid of the can, it will extend outwardly beyond the wall flange 122 and thus be folded into the seam 129 as indicated at 137, when the end wall, top or lid of the can is applied by conventional top or lid applying machinery.

Also in the procedure of applying the lid and the foil or frangible sheet 136, a suitable adhesive or cement is interposed between the peripheral portion of the frangible sheet and the lid and on the under side of the frangible sheet at the periphery so as to form a hermetic seal or bond in the seam.

The frangible sheet 136 is drawn tightly against the under surface of the lid or end wall 116 through the area of the same as shown in FIG. 14 and being irn-perforate, it forms a leak-proof seal over the opening 138 which is formed in the operation of stamping the tab 132. Thus, it will be seen that liquids within the receptacle, even those under heavy pressure, will be prevented from escaping by reason of this frangible liner sheet, but since the frangible sheet is thin and easily cut away when the central or disc portion of the lid is removed, any suitable means may be used to puncture the foil or cut it out of the opening which will be formed. Even though the frangible sheet is of relatively thin character, it will not only withstand the outwardly directed forces applied thereto as a result of high pressures within the receptacle, but, as hereinbefore stated, a high degree of vacuum can be established in the receptacle without rupturing the frangible sheet, thereby making the receptacle particularly well adapted for use in the merchandising of vacuum packed commodities, such as coffee, to give only one example.

In the operation of opening the receptacle, the tongue or tab 132 is grasped as shown in FIG. 12 and bent upwardly and then by applying a sharp pull or jerk to the tab, the portion of the removable disc part 118 lying within the extent of the slit 128 and to which the outer end of the tab is attached, will easily come away and due to the centralization of the outer end of the tab bet-ween the ends of the slit 128, a balanced and equal pull will be ap plied at the ends of the slit 128 to the scored part of the metal and the metal will readily tear along and around the score lines to the ends of the other slit 13% which lies opposite to the slit 128.

FIG. 13 illustrates the manner in which the disc portion 118 will bend up as it tears and FIG. 16 illustrates the large open area which is formed in the end wall or lid when the central disc portion 118 is completely removed, thus forming the pour or discharge opening 139 and exposing the frangible liner sheet 136 which can then be readily cut out as previously stated.

Referring now to the embodiment of the invention as illustrated in the second group of FIGURES designated 17 to 21, the structure hereinbefore described as shown in FIGS. 11 to 16, is substantially repeated except for the manner in which the central part of the end wall, which lb is to be opened, is formed. In these FIGURES 17 to 21, the can as a whole is designated 11% and the end wall corresponding to the wall 116 is generally designated 1.16, while the central part or disc portion of the end wall or lid which is to be removed is generally designated 118'.

In the shaping of this wall 116', the pull tab or tongue 132 is cut or stamped out in the same manner and in this stamping operation, the metal sheet from which the wall is stamped is slit in one place only, as indicated at 1449. This arcuate slit joins at its ends with the circular score line Mill which extends from the end of the slit completely around the disc portion 118' to the opposite end of the slit as shown in FIG. 17.

It will be seen that the single slit 146 extends equal distances beyond the longitudinal sides of the tongue 132' as is the case with respect to the slit 12S and the tongue 132 so that when the tongue 132 is bent up and give-n a sharp pull, the strain will be applied to the metal equal distances on opposite sides of the tongue and will pull up the metal disc through the extent of the slit and cause the scored portion to tear along the score line 141 at the same rate from the two ends of the slit and around the disc portion 118' so that the latter will come away cleanly, as illustrated in FIG. 21.

In this second embodiment as shown particularly in FlG. 20, the pull tongue or tab 132' is bowed slightly intermediate the free and attached ends thereof as indicated at 142 so that the tongue can be readily grasped and bent upwardly in the manner illustrated in FIG. 18.

In this latter embodiment the frangible liner sheet which covers the under side of the end wall or lid 116' is designated 143 and is folded in and connected to the periphery of the end wall or lid and the turned down edge of the can wall 112 in the same way as described in connection with the previous embodiment.

When the major portion of the lid has been removed by the tearing away of the central disc portion 118', the large pour opening 139 remains, exposing the frangible sheet for removal by a suitable means, as hereinbefore described.

FIGS. 22 to 26 illustrate an embodiment of the invention wherein the removable disc-like central portion of the end wall is differently constructed from the central portions 118 and 118' shown in the preceding figures.

In FIG. 22 the removable central disc portion of the can end wall, here generally designated 116", is des ignated 144. This disc portion 144 i provided with the diametrically opposite relatively

short slits

145 and 146 corresponding to the

slits

128 and 138, and these two slits are separated by the a-rcuate score lines 147, which with the arcuate slits, complete the circular periphery of the part 14 4 of the wall which is removable.

The pull tongue for removing the part 144 is here designated 148 and as shown this tongue, instead of being cut or stamped from the metal of the removable disc portion 14 constitutes a separate strip of metal which lies upon the top of the portion 144 and is secured by spot welding as at 149, or in any other suitable manner, to the end which lies closely adjacent to the slit 145. The tongue extends radially toward the center of the removable portion 144 as shown and as in the other cases, it is equidistantly spaced at its sides from the adjacent ends of the slit 145 so as to apply the desired balanced strain upon the metal when the tongue is lifted up and pulled outwardly so that the tearing of the metal will take place evenly along the two score lines 147 lying between the

slits

145 and 146.

FIGURE 27 is a sectional view of a portion of the top of a can, corresponding to the sectional view of FIG- URE 23, illustrating another means, as hereinbefore referred to, of securing the pulling tab to the portion of the can wall, to be removed. In this figure the portion of the wall to be removed is designated 244 and the line of division between the pullout portion and the surrounding rim of the can top is designated 245. The pulling tab is snee /ea ll designated 254i and the means illustrated-for securing the pulling tab to the pull-out portion 244- is here illustrated as a rivet 249, as claimed.

In FIG. 25 the removable central disc portion of the end wall is designated 144 and here only a single slit bowed as at 150 so as to be elevated slightly from the surface of the removable portion 144. While no illustration is given, it is to be understood that the tongue 14% will be bowed outwardly slightly away from the removable portion 144' in the same manner. This out-bowing of the tongue 348 not only facilitates grasping the tongue so as to pull outwardly upon the removable part of the end wall or lid, but it willbe seen upon reference to FIG. 24 that such grasping of the end of the tongue is facilitated by applying downward pressure to the bowed portion 150 by a thumb I151, which will cause the end of the tongue to rise up slightly as indicated at 152 so that the elevated end 152 can be caught by the tip of a finger 153 and the tongue then readily bent upwardly to the necessary angle to enable the person opening the receptacle to apply the desired pull or jerk to the tongue and this pull or jerk must be directed upwardly and inwardly with respect to the removable portion to thereby raise the peripheral part of the removable portion bordering the slit nearest to where the tongue is attached.

In the formation of the slits and the score lines for the removable portions of the can tops or lids, it is important thatthe attached end or" the pull tongue be exactly centered between the ends of the slit nearest thereto so that as previously stated, the strain which will be applied through the tongue to the removable portion of the lid will be transmitted with equal force or intensity to the metal at the ends of the. score lines where the latter join the ends of the slit. By this arrangement the easy and complete removal of the removable portion of the wall will be accomplished Without difficulty. While the tongues 14% and i4fi"which are applied to the top surface of the removable portions 14-4 and 14 have been shown in FIGS. 22 and 25 as being in the form of straight strips of metal of substantially constant width throughout, it is not essential to the proper operation of the invention that the tongues be so formed, but the tongues may take other forms, such for example, as that shown in FIG. 26 where the tongue, which is generally designated i, is substantially lozenge shaped and is attached by spot welding or the like approximately at its center as indicated at 155'. Regardless of the form or shape of the tongue it is, as previously stated, important that it lie exactly midwaybetween the ends of the slit which is adjacent thereto and which slit in FIG. 26 is designated 156.

Broadly summed up, the present invention envisions a receptacle wherein a wall is formed to provide a material discharge opening by having in its structure a fixed portion and a fully removable portion and wherein the said removable portion is secured to the fixed portion by solid, rupturable connecting means separated by a structural form which will permit the removable portion to be readily separated from the fixed portion when a pull is applied to the removable portion. This concept encompasses any means by which the desired separation may be easily accomplished upon the rupture of the solid connecting means between the portions either by reason of the described slits or by reason of a weakening of the material between the connecting means and it also encom- "i2 passes the employment of applied rupturable connecting means as well as employment oi continuing solid portions of the material of which the receptacle wall is formed. Any of the structural features backed up 'by the sheet of rangible material provides a new concept in the art of re ceptacles and opening means therefor.

From the foregoing, it will be seen that the present in vention provides in the several forms or variations thereof, here illustrated and described, a novel means for opening a receptacle or for forming a pour opening in a receptacle wall, particularly a can, wherein the opening means is embodied in an integral major portion of the wall and, due to the novel arrangement of the pull tabs with respect to the slits in the wall defining a portion of the removable part or portion'thereof, such removable portion can be quickly and completely separated from the surrounding part of the wall with one quick snapping or jerking motion after the tab has been grasped by the fingers. The underlying frangible sheet thus exposed may then be readily cut out or removed, either by using an edge portion of the removed metal piece or by means of any other suitable cutter so as to give access to the interior of the receptacle.

It will also be seen that the invention may be embodied in a wall surface of any size or shape and that the removable portionof the wall may cover or take in any desired area of the wall surface of which it forms a part. It will alsobe-understood that the invention comprehends the prefabrication of the can end or cap'whereby any number of the same may be stacked and handled by conventional can closing or lidding machinery in the usual manner. Moreover, the manner of removing the removable portion of the can top is accomplished uniquely in that by applying one quick pull upwardly to the tab, and in substantially the same one motion, the removable portion is readily detached or'disconnected from that portion a of the can top surrounding it and which is permanently attached to the can body.

As this invention may be embodied in several forms without departing from the spirit or essential characteristics thereof,rthe present embodiment is therefore illustrative and not restrictive, since the scope of the invention is defined in theappended claims, and all changes that fall within the metes and bounds of the claims, or that form their functional as well as conjointly cooperative equivalents, are therefore intended to be embraced by those claims.

We claim:

1. A wall construction for areceptacle comprising a body of sheet material adapted for sealed attachment to a receptacle wall, said sheet having a pull-out portion retained in place by a weakness line in the material, and the material of the sheet within the contour of said portion having a pull tab permanently'fixed thereto, and the pull tab being adapted to be bent out and grasped by the .fingers of a human hand to facilitate the pulling out and total removal of the portion with the said pull tab afilxed thereto.

2. A wall construction fora receptacle comprising a body of sheet material adapted for sealed attachment to a receptacle wall, said sheet having a pull-out portion retained in place by a weakened line in the material, and the material of the sheet within the contour of said portion having a part thereof which is bendable and positioned to be bent out for grasping by the fingers of the human hand to facilitate the pulling out and total removal of the portion with said part aflixed thereto.

3. A wall construction for a receptacle comprising a body of sheet material having an outwardly disposed portion thereof adapted for sealed attachment to a receptacle wall, said sheet having a pull-out portion inwardly of the outwardly disposed portion and being retained in place by a weakness line in the material, and the sheet material within the contour of said portion having a pull tab permanently fixed thereon, and the pull tab being adapted to i3 be bent out for grasping with only the fingers of the human hand and pulling to effect the simultaneous complete separation of the pull-out portion from the outwardly disposed portion and the pulling out of the complete pull-out portion with the said tab afiixed to the said pull-out portion.

4. A wall construction for a receptacle comprising a body of sheet material adapted for sealed attachment to a receptacle wall, said sheet having a pull-out portion retained in place by a weakened line in the material, and the material of the sheet within the contour of said portion having a part thereof adapted to be grasped only by fingers of the human hand and pulled to effect the substantial simultaneous separation of the pull-out portion along the weakened line and the pulling out and removal of the portion with the said part thereof.

5. A can top having a central portion with inner and outer sides and a marginal portion for attachment to a can body, said central portion of the top having a rupturable connection with said marginal portion thereof, a onepiece bendable pull tab lying totally within the perimeter of the area defined by the central portion of the top and having a portion thereof permanently fixed to the central portion adjacent to a perimetrical portion thereof, said poll tab having a free portion directed inwardly toward a perimetrical portion of the top remote from the perimetrical portion to which the first mentioned portion of the tab is fixed, and when the said free portion of the tab is grasped and pulled by only the fingers of the human hand, the said connection is ruptured and the central portion of the top is thus completely removed with the said tab afiixed to the said pull-out portion.

6. A can top having a central portion with inner and outer sides and a marginal portion for attachment to a can body, said central portion of the top having a rupturable connection with said marginal portion thereof, a one-piece bendable relatively wide pull tab lying totally within the perimeter of the area defined by the central portion of the top and having a portion thereof permanently fixed to the central portion adjacent to a perimetrical portion thereof, said pull tab having a free portion directed inwardly in close association with the outer surface of the central por tion of the top and directed toward a perimetrical portion of the top remote from the perimetrical portion to which the fixed portion of the tab is fixed, and when the said free end portion of the tab is lifted by a finger of the human hand and grasped and pulled by the fingers the said connection is ruptured and the central portion of the top is completely thus removed with the said pull tab aifixed thereto.

7. A can top having a central portion with inner and outer sides and a marginal portion for attachment to a can body, said central portion of the top having a rupturable connection with said marginal portion thereof, a one-piece sheet material bendable pull tab lying totally within the perimeter of the area defined by the central portion of the top and having an end portion thereof permanently joined to the central portion adjacent to a perimetrical portion thereof, said pull tab having a free end portion directed inwardly toward a perimetrical portion of the top remote from the perimetrical portion to which the first mentioned end portion of the tab is joined, and when the free end portion of the tab is lifted by a finger of the human hand and grasped and pulled by the fingers, the said connection is ruptured and the central portion of the top becomes completely free and i thus completely removed with the said pull tab aifixed thereto.

S. A can top having a central portion with inner and outer sides and a marginal portion for attachment to a can body, said central ortion of the top having a rupturable connection with said marginal portion thereof, a onepiece elongated bendable pull tab struck from, integral with, and substantially coplanar with, and defining an opening in, the material of the central portion of the top, said tab being substantially of the dimensions of the opening and being disposed therein and closing same and lying within the perimeter of the area defined by the central portion of the top and having a portion thereof permanently fixed to the central portion, said pull tab having a tree portion directed inwardly toward a perimetrical portion of the top, and when the free end portion of the tab is lifted by a finger of the human hand and grasped and pulled by the fingers, the said connection is ruptured and the central portion of the top is thus removed with the said integral pull tab attached thereto.

9. A can top as defined in and by claim 8, wherein a frangible member extends over the said opening and is disposed on and held in engagement with the inner side of the can top.

10. A can top as defined in and by claim 8, wherein the central portion of the can top has a continuous slit therein defining the opening and the pull tab and has a free end and an attached end, the attached end of the pull tab being in relatively close proximity to the perimeter of the area defined by the central portion .of the top, and the pull tab being adapted to be bent outward for grasping by the said fingers.

11. A can top as defined in and by claim 10, wherein the pull tab has an outward bow intermediate its ends to project intermediate its ends slightly above the outer side of the central portion of the can top for facilitating the said lifting and grasping of the pull tab whereby the pull tab may be bent and pulled to remove the central portion from the can top.

12. A can top as defined in and by claim 11, wherein an imperforate sheet of frangible material overlies the inner side of the central portion of the can top and is sealed throughout its perimeter to the end of the can body outside of the rupturable connection of the central portion of the can top with the marginal portion thereof.

13. A one-piece can top as an individual article of manufacture, the top being comprised of a central recessed portion surrounded by a relatively narrow upstanding wall and an outwardly and downwardly extending flange and the downwardly extending flange being of less width than the upstanding wall, the upstanding wall and the flanges serving as means for attachment to the end of a can body, there being a juncture defined where the upstanding wall merges from the perimeter of the recessed portion, the juncture having thereat a weakened readily rupturable line completely therea'round whichretains the recessed portion of the top and the upstanding wall in their proper relationship, a readily frangible membrane on the inner side of the recessed portion, and pull tab means carried by the recessed portion so that this recessed portion when the tab is grasped by the fingers of the human hand and pulled, may be completely removed from the upstanding wall portion with the pull tab attached thereto.

14. A can top as defined in and by claim 13, wherein the pull tab is elongated and is integral with and struck from the material of the recessed portion of the top thereby forming an opening over which the frangible membrane extends and into which opening the pull tab is positioned.

15. In a receptacle, a wall having a contour defining perimeter, the wall portion circumscribed by said perimeter being of a relatively thin tearable material, said material being structurally modified along a full circular line lying closely adjacent to said perimeter in a manner to facilitate complete removal of the major part of the wall lying within said perimeter, said structural modification along said line consisting of a weakened reduced thickness of the material through the major extent of said line and a slit through the material along a minor extent of the line, and means carried by the wall material within the area circumscribed by said line for grasping by the fingers of the human hand and exerting a manual tear-out pull upon the material between the ends of said slit whereby the entire wall portion lying within said circular line together with said means is removable by one quick pull thereon.

16. A cap for closing an end of a receptacle such as a can, said cap comprising a plate having a peripheral flange adapted for joinder to an edge of a wall of a receptacle, said plate being of relatively thin tearable material, said -material being structurally modified in the area of the cap circumscribed by said flange by a continuous line defining a part of the wall to be removed, and said structural modification along said continuous line consisting of a weakened reduced thickness of the material through a major extent of the line and a slit extending entirely through the plate material along a minor extent of the line, and a pull tab attached to the said part of the wall, close to the slit, and within the area circumscribed by said line and formed to be grasped and pulled by the fingers of the human hand, and efiect the simultaneous removal of the said part and the pull tab joined thereto.

17. The invention according to claim 15, wherein the attachment of the pull tab is between the center of the wall and the slit and centrally between the ends of the slit whereby upon application of an outward pull to the tab by fingers of the human hand, tearing strain will be applied simultaneously and with equal force to the weakened thickness of the'material at the ends of the slit.

18. The invention according to claim 16, wherein the attachment of the pull tab is between the center of the wall and the slit and centrally between the ends of the slit whereby upon application of an outward pull to the 'tab by fingers of the human hand, tearing strain will be applied simultaneously and with equal force to the weakened thickness of the material at the ends of the slit.

19. A receptacle having a first wall defined by a flange, the wall flange comprising a locking head between the said first wall and another wall of the receptable, said first wall having a structural modification along a line circumscribing a section thereof intended for removal to provide an access opening into the can, the said modification of the first wall through a major part of said line being in the form of a weakened thickness of the material of the wall and a pair of slits extending through the wall .in diametrically spaced locations, and a pull tab attached to said section closely adjacent to one of said slits and formed to be grasped by fingers of the human hand and pulled to separate said first wall section from said locking bead along said line of weakness.

29. The invention according to claim 16, wherein the tab comprises a body integral with and cut from the material of the wall.

first wall and another wall of the receptacle, an imperforate sheet of thin frangible material secured over the inner surface of said first wall, said first wall having a structural modification along a line circumscribing a sec tion thereof intended for removal to expose said imperforate sheet, the said modification of the first wall through a major part of said line being in the form of a weakened thickness of the material of the wall and a pair of slits extending through the wall in diametrically spaced locations, and a pull tab attached to said section closely adjacent to one of said slits and formed to be grasped by fingers of the human hand and pulled to separate said circumscribed section of the first wall from the said locking bead along said line of weakened thickness of the material.

23. The invention according to claim 22, wherein the said tab comprises in the major part thereof a cut out portion of the wall section, the remaining part of the tab forming the attachment of the tab to the wall section.

24. The invention according to claim 21, wherein the and is bowed outwardly from the wall section intermediate its ends to facilitate grasping between fingers. v

25. A wall construction for a receptacle comprising an imperforate body of sheet material adapted for sealed attachment to a receptacle wall, said sheet material having a pull-out portion retained in place by readily fracturable line of weakness in the material, and the material of the sheet within the contour of said portion having a pull tab welded permanently thereon, and the pull tab being adapted to be bent out for grasping with the fingers of the human hand to facilitate the pulling out and complete removal of the portion with the pull tab affixed thereto.

26. A wall construction for a receptacle comprising an imperforate body of sheet material adapted for sealed attachment to a receptacle wall, said sheet material having a pull-out portion retained in place by a readily fracturable line of weakening'in the material, and the material of the sheet within the contour of said portion having a part thereon welded thereto and adapted to be bent out for grasping with the fingers of the human hand to facilitate the pulling out and complete removal of the portion and the pull tab afiixed thereto by an upward motion in a substantially vertical plane.

27. An imperforate can top having a central portion with inner and outer sides and a marginal portion for with said marginal portion thereof, a one-piece bendable pull tab for grasping with the fingers of the human hand and lying within the perimeter of the area defined by the central portion of the top and having'a portion thereof permanently welded to the central portion adjacent to a perimetrical portion thereof, said pull tab having a free portion directed inwardly toward a perimetrical portion of the top remote from the perimetrical portion to which the first mentioned portion of the tab is fixed, whereby when the free portion of the tab is lifted by a finger and grasped and is pulled upward with the fingers in a substantially vertical plane the central portion ofthe top is completely removed with the pull tab affixed thereto,

28. A wall construction for a receptacle as defined in 1 and by claim 26 wherein the body of sheet material has an inner surface, a frangible material extending over said inner surface of the sheet material and including that part thereof which underlies the readily fracturable single line of weakness.

29. An imperforate can top as defined in and by claim 27 wherein fracturable material extends over the inner side of the can top and includes that portion thereof underlying the readily fracturable single line rupturable connection.

SilJAn end wall unit for attachment to the end of a can body, said unit being comprised of a circumscribing rim portion for permanent attachment to the can body, the said rim portion having integral therewith a central portion detachably connected thereto to provide an opening in thesaid unit when said central portion is removed from the rim portion, said rim portion having a top edge and an inside wall part, the said central portion lying in a plane below the said top edge of the rim portion and meeting said inside wall part to form an inside corner angle, said central portion being demarcated by a separable line of division lying in said angle closely adjacent to said inside wall part and providing for complete detachment'and removal of the central portion from said rim portion, said central portion when detached from said rim portion along said line of division in said'angle leaving the rim portion attached to the wall of the can with an edge at the said inside corner angle, and a pull tab permanently carried by said detachable central portion and completely within the area defined by said line of division and lying below the said top edge of said rim and the pull tab being adapted for bending upwardly by a human finger and to be grasped by the fingers of a human hand for pulling outwardly on the tab and thus completely separating the said central portion completely and continuously along said line of division from said rim portion and allowing the central portion only to be completely removed along with the attached pull tab and providing the said opening.

31. An end wall unit for attachment to the end of a can body, the said unit consisting of a body of sheet metal having a circumscribing portion forming a rim adapted for permanent attachment to an end of a can body wall, the said sheet metal body including a central portion detachably joined to the rim at spaced intervals therearound by integral, fracturable tongues to provide an opening in the said body of sheet metal when said tongues are broken and said central portion is removed from the rim portion, said rim portion having a top edge and an inside wall part, the said central portion lying in a plane below the said top edge of the rim portion and meeting said inside wall part to form an inside corner angle, said central portion being demarcated by arcuate slits in the sheet metal body forming a separable line of division lying in said angle closely adjacent to said inside wall part and said fracturable tongues lying in said angle between and separating adjacent ends of said slits and when fractured providing complete separation of the central portion along said line of division in said angle from said rim portion, forming said opening in the body of sheet metal and leaving said rim portion attached to the wall of the can with an edge at the said inside corner angle, the said spaced apart tongues each being of a width materially less than the length of each of said slits, a sheet of frangible material secured against the underside of said body of sheet metal and covering and sealing said slits, and a pull tab permanently carried by said detachable central portion within the area defined by said line of division and lying below the said top edge of said rim, the said pull tab being bendable and having a free end and being formed to be engaged by a human finger for raising said free end and to be grasped and bent outwardly by the fingers of a human hand for pulling outwardly on the tab and on the central portion to thereby fracture said attaching tongues and separate the said central portion completely along said line of division from the rim portion and the attached complete removal of the central portion and pull tab.

32. A wall construction for a receptacle, said wall construction comprising a body of sheet material having integral peripheral means for sealed attachment to a receptacle wall, said body of sheet material having a pullout portion retained in place by a readily fracturable line of weakness in the material, and the said pull-out portion having a pull tab secured thereto by rivet means and the pull tab being adapted to be bent out with a finger of the human hand and grasped between the fingers of the human hand to facilitate pulling out and complete re moval of the said portion with the said pull tab affixed thereto.

33. A wall construction for a receptacle, said wall construction comprising a body of sheet material having integral peripheral means for sealed attachment to a receptacle wall, said body of sheet material having a pullout portion retained in place by a readily fracturable line of weakness in the material, a pull tab lying upon the surface of the body of sheet material and rivet means securing the pull tab to the said pull-out portion, and said pull tab having an end adapted to be engaged, bent out and lifted by a finger of the human hand and grasped between the fingers of the human hand to facilitate pulling out and complete removal of the portion with the said pull tab affixed thereto.

34;. A wall construction for a receptacle, said wall construction comprising a body of sheet material having integral peripheral means for sealed attachment to a receptacle wall, said body of sheet material having a portion thereof retained in place by a readily fracturable line of weakness in the material and designed to be torn out along said line of weakness, an elongate pull tab lying upon the surface of the body of sheet material, and rivet means securing the pull tab at one end to the said portion, and the other end of said pull tab being adapted to be engaged by a finger of the human hand and lifted and bent out and grasped between the fingers of the human hand to facilitate pulling out and complete removal of the said portion with the said pull tab afiixed thereto.

A wall construction for a receptacle comprising a body of sheet material formed for sealed attachment to a receptacle wall, said sheet having a pull-out portion retained in place by a weakness line in the material of the sheet, a pull tab on the sheet material and permanently affixed thereto within the contour of said pull-out portion, and the said pull tab comprising a body of readily bendable material disposed to be grasped with only the fingers of the human hand and bent out and pulled to efiect the simultaneous complete separation of the pull-out portion from the adjoining portion of the sheet and the pulling out of the complete pull-out portion With the said tab aflixed to said pull-out portion.

References fitted by the Examiner UNITED STATES PATENTS 1,403,532 1/22 Wright 21551 1,520,403 12/24 Coates 2155l 2,029,328 2/ 36 Ljungstrom 220-52 2,029,329 2/ 36 Ljungstrom 22052 2,082,760 6/37 Berni 22048 2,085,200 6/ 37 Ljungstrom.

2,092,671 9/37 Hildebrandt 22052 2,146,226 2/39 Punte 2297 2,615,610 10/52 White 2297 2,652,148 9/53 Pfeifer 220-63 2,781,149 2/57 Fried 220-48 2,790,577 4/57 Fried 22048 2,821,326 1/58 Fried 22048 THERON E. CONDON, Primary Examiner. EARLE 3. DRUMMOND, Examiner.

Claims

1. A WALL CONSTRUCTION FOR A RECEPTACLE COMPRISING A BODY OFSHEET MATERIAL ADAPTED FOR SEALED ATTACHMENT TO A RECEPTACLE WALL, SAID SHEET HAVING A PULL-OUT PORTION RETAINED IN PLACE BY A WEAKNESS OLINE IN THE MATERIAL, AND THE MATERIAL OF THE SHEET WITHIN THE CONTOUR OF SAID PORTION HAVINGA PULL TAB PERMANENTLY FIXED THERETO, AND THE PULL TAB BEING ADAPTED TO BE BENT OUT AND GRASPED BY THE FINGERS OF A HUMAN HAND TO FACILITATE THE PULLING OUT AND TOTAL REMOVAL OF THE PORTION WITH THE SAID PULL TAB AFFIXED THERETO.