US2097031A - Strip-serving machine - Google Patents

Description

Oct. 26, 1937. G. LOEWENBERG STRIP SERVING MACHINE Filed April 11, 1934 6 Sheets-Sheet l N vezzz or. C-TzfsZerz Zoezuerz 1937 e. LOEWENBERG STRIP SERVING MACHINE Filed April 11, 1934 6 Sheets-Sheet 2 Oct. 26, 1937 G. LOEWENBERG STRIP SERVING MACHINE Filed April 11, 1934 6 Sheets-Sheet 3 M i/v,

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STRIP SERVING MACHINE Filed April 11, 1934 6 Sheets-Sheet 6 Patented Oct. 26, 1937 UNITED, STATES PATENT oFFicsr STRIP-SERVING MACHINE Application April 11, 1934, Serial No. 720,108

'7 Claims.

This invention relates particularly to stripserving machines, especially adapted to the purpose of serving gummed tape. If desired, the machine may be used to serve ungummed tape,

in which case the moistening device illustrated may be replaced by any suitable adhesive-applying device.

The primary object is to provide a strip-serving machine of improved general construction which may be power-driven and is adapted to serve tape and sever the same in any desired length.

The invention is illustrated in a preferred embodiment in the accompanying drawings, in

which:

Fig. 1 is a side elevational view of a machine embodying the invention; Fig. 2, a plan view of the same; Fig. 3, a front elevational view of the same; Fig. 4, a vertical sectional view, taken as no indicated in line 4 of Fig. 3; Fig. 5, a vertical sectional view taken as indicated at line 5 of Fig. 3; Fig. 6, a vertical sectional View, taken as indicated at line 6 of Fig. 3; Fig. 7, a fragmentary sectional View, taken as indicated at line l of N Fig. 6; Fig. 8, a broken plan sectional view, taken as indicated at line B of Fig. 5; Fig. 9, a fragmentary sectional View, taken as indicated at line 9 of Fig. 6 and showing diagrammatically the wiring diagram for an electric motor; Fig. 10, a vertical sectional view, taken as indicated at line iii of Fig. 5; Fig. 11, a fragmentary sectional view taken as indicated at line H of Fig. i; Fig. 12, a fragmentary sectional view of the camadjusting lever, taken as indicated at line l2 of 35 Fig. 4; Fig. 13, a broken vertical sectional view, similar to Fig. 6, showing the starting lever in switch-closing position; Fig. 14, a similar view showing the operating mechanism in position to serve a strip longer than required by the cam ad- 40 justment; and Fig. 15, a vertical sectional View showing the knife mechanism, taken as indicated at line l5 of Fig. 13.

In the preferred construction, which is illustrated, A designates a frame, or casing, compris- 45 ing a base-member A and .a cover-member A pivotally connected at its rear end-portion with the base A; B, a rotatable main shaftjournaled in the member A and equipped with a rigidly connected pawl-carrier B adapted 50 to drive a ratchet wheel B which is rigidly connected to a feed-wheel B journaled on the shaft B; C, a spring-pressed additional feed-roll which co-acts with the feed-wheel B D, a roll of gummed tape-mounted in the rear por- 55 tion of the casing A, from which a strip of paper passes to the feed-roll; E, cutting mechanism I comprising a cutter-equipped lever E, a link E and a trip-lever E which has its lower end pivoted to the frame A; F, a finger-operated starting lever; G, a knife-switch wired to a motor G; H, a water-fount removable through the open front end of the casing, and equipped with a capillary member H adjustably mounted therein; and a pivotally mounted pressure-member H which coacts with theupper end of the member H. a

In the embodiment of the invention shown, the frame A is composed of elongated hollow castings mounted one upon another. The main part of the frame comprises the base casing A, and the cover A is used to enclose the chamber which holds the roll of tape, and may be omitted, if desired. The casing A comprises a perimetral wall which provides side walls and end walls. The casing is open at the top and bottom.

The cover A is connected at its rear end by a pivot l6 with the upper rear portion of the easing A. The cover is in the form of a hollow casting which is provided with side walls ii and a curved top wall It which also form the front and rear walls of the cover. The lower edges of the side walls ll of the cover rest upon the upper edges of the side walls E9 of the casing A. The front wall of thecover is cut away to provide a space 26 which for-ms with the top wall of the base casting 2!, a throat through which the paper strip is fed. A gravity presser member. 2 l is provided to press the strip of tape flat against the top wall 2! of the frame A.

As shown in Fig. 1, the side walls I! and I9 are struck outwardly at 22 to provide vertical slots in which the shaft 23 of the web roll may travel vertically. As shown in Fig. 5, the membar A is equipped with a curved top wall 24 on which the roll of gummed tape may rest. The main drive-shaft B, as shown in Fig, 5, is equipped with agear 25 which is engaged by a worm 26 provided on a shaft 2! which is driven by shaft 28 of the motor G. The shaft 21 is journaled in thegear box 29, which is suspended from the shaft B by means of a pair of upwardly extending arms 30. The motor is suspended from the frame member A by means of screws Si in such manner that in case it is desired to examine the motor, said screws may be removed and the motor swung downwardly out of the casing, without disconnecting the :gears'from the shaft B. a e

The pawl-carrier B is rigidly connected. to the shaft B by means of a bolt 32- The outer end of the pawl-carrier is equipped with a pivotmember 33 which provides a stud 34 upon which the pawl 35 is journaled. A coil spring 36 is wrapped about the pivot member 33 and has one end connected to a projection 35 on the pawl and the other end with a projection 31 on the pawl-carrier. Said spring urges the pawl into engagement with teeth 38 provided on the ratchet wheel B As best shown in Figs. 10 and 11, the feed-wheel B and the ratchet B are mounted on a bushing 39 which is jcurnaled on the shaft B.

A bushing 40 is also journaled on the shaft B and carries a rigidly connected cup-shaped arcuate cam-member M which is adapted to be engaged by the outer end-portion of the pawl 35, upon rotation, and disconnect the pawl from engagement with the ratchet teeth. The cam may be adjusted angularly by means of a fingermember 43 which may be adjusted in a slot 44 provided in a member 45 which is secured to the side walls of the casing A by means of screws 46. The slot is provided with enlarged portions 44 to hold the member in a desired position. In order to move the member the finger piece 43 is depressed on its arm 43 which is rigidly connected to the shaft B, against a compression spring 4'! and swung to a desired position where the member 43 is allowed to project from one of the openings 44*. Thus it will be understood that by angularly adjusting the member 43 the length of the arc through which the ratchet is engaged may be determined, and accordingly'the length of strip served by the feed-wheel during each revolution of the shaft B may be adjusted as desired.

At the right-hand end of the shaft B, shown in Fig. 10, a cam member is rigidly connected by means of a bolt 50 A spacing collar 5| is provided between the cam-member and the wall of the machine. The cam is provided with a projection 52 which is adapted to engage the arm E as will be explained below.

The spring-pressed idle-feed roll C is journaled on a horizontal pin 53, as shown in Fig. 10, carried by a sheet-metal member 54, which is provided at its lateral edges near its rear end with upturned lugs pivotally mounted on a shaft 55 (Fig. 5). A spring 56 encircles the shaft 55 and urges the roll G into engagement with the feed- Wheel B as will be readily understood.

As shown in Fig. 5, the roll of gummed tape preferably, is wound on a core 56, carried by shaft 23 upon which are disposed a pair of spring plates 57 which can be adjusted to provide the desired amount of friction on the sides of the core 56. The plates 5! are of elongated form and fit freely within the cover A but do not rotate when the tape is withdrawn.

The cutting mechanism E will be understood by reference to Figs. 1--5 and 15. The front portion of the top wall 2| of the casing A is cut away and provided with a knife-edge 60. The

horizontally disposed blade-carrying lever E has one end connected to the frame A by means of 'a pivot 6|. A leaf spring 62 urges the blade into sharpening engagement with the member 66. The lever E is normally held in elevated position by means of the link E which is pivotally connected at its lower end to the trip member E cam is rotated counter-clockwise the'arm will be depressed to the dotted position indicated in 6 and the cutter blade will be actuated to sever the tape.

When the operating lever F, which is pivoted to the frame A at 64, is depressed, it forces the knife-switch G to complete the motor circuit (as shown diagrammatically in Fig. 9) and the shaft B is put in motion. As shownin Figs.r6, 13 and .14, the trip-arm E maybe held in the path of the projection 52 by means of a cam-member 65 which is pivoted to the frame A at 66. The cam makes a lost motion connection with the lever F by means of a link 61 and pivot-member 61 The cam is urged against a stop 68 by means of a tension-spring 69. The starting-lever F is urged upwardly by means of a tension spring 76.

In case it is desired to serve a strip of tape of a greater length than the machine happens to be adjusted for, the operator may hold down the operating arm F. This will move the arm E out of the path of the projection 52 and permit the ratchet wheel to be re-engaged by the pawl on each revolution without operating the cutter. As a safety measure, to prevent the arm E from being permitted to swing back into the path of 52 by inadvertent release of the arm F, a latch-arm 'H is pivoted to the frame at H The purpose of this latch-arm is to prevent the projection 52 from striking the end of the lever E and jamming the machine on center. The front end of the latch is urged into engagement with a tooth 65 of the cam 65 by means of a tension spring 12. The cam 50 has a cut-away portion diametrically opposite from the projection 52 and has a curved portion 13 to engage the rear end of the latch-arm and release the cam 65 when the projection 52 has passed the danger point.

Referring now to the switch G, it will be understood that it is wired in series with a source of power and the motor by means of wires and 8|. The knife of the switch 82 is mounted on an insulated arm 83 which is pivoted to the frame at 84 and is equipped with a tension spring 85 which is mounted in toggle-fashion so as to urge the blade into open or closed position. The lower end of the arm 83 is provided with a projection 86 which is engaged by the member E Thus, it will be understood that when the projection 5 2 depresses the trip-member E the switch will be thrown open automatically.

The lever-mechanism described above is made up in a unit enclosed in a housing 81. This housing is removably secured within the frame A by means of screws 88.

The water fount G and moistener H as well as the pivotally mounted presser-member H are of the same type shown in Herman patent 1,849,759. The fount may be removed from the machine by depressing a finger-member provided in the front of the casing A.

To operate the machine the finger-member'F is depressed. This action closes the switch G and starts the motor G which causes the pawlcarrying member B to rotate. The pawl is urged into engagement with the teeth in the ratchet wheel B and the feed-wheel B cooperating with the roll C, feeds forwardly a strip of tape until the tail of the pawl 35 comes into engagement with the arcuate cam 4|, which releases the pawl from driving the feed-wheel. The projec- The latter action causes the.

cutter blade to sever the projecting strip and opens the switch G. The momentum of the motor is sufficient to carry the projection 52 far enough to permit the member E to resume its normal position shown in full lines in Fig. 6. In case an additional length of unsevered tape is desired, the operator may either hold the fingermember F depressed or may again trip it before the cutter blade is actuated. This will cause the pawl-carrier to continue to rotate and the feedwheel will continue to feed the strip in spurts. During each revolution the feed-wheel is partially rotated and then disconnected, which causes the intermittent or spurty feeding action.

The foregoing detailed description is given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, but the appended claims should be construed as broadly as permissible, in view of the prior art.

What I claim as new and desire to secure by Letters Patent is:

1. In a machine of the character set forth: a a frame; a shaft journalled in said frame and 25 provided with a projecting arm; a strip-feeding wheel journalled on said shaft; a ratchet and pawl device interposed between said shaft and strip-feeding wheel; means for releasing said pawl from the ratchet during part of each revo- 30 lution of the shaft; cutter-means for severing a length of strip advanced by said feeding wheel; a lever disposed in the path of said projecting arm to actuate said cutter-means; and means for moving said lever out of the path of the pro- 35 jecting arm to avoid operation of the cutter means.

2. A device as specified in claim 1, including timing means for preventing return movement of the lever into the path of the projecting arm 40 during a portion of the cycle of rotation of the shaft.

3. A machine of the character set forth: a frame; a shaft journalled in said frame and provided with a cam and a projecting arm; a strip- 5 feeding wheel journalled on said shaft; a ratchet frame so as to move said lever into and out of the path of the projecting arm; and a latching member pivotally mounted on said frame with one end engaging said cam and the other adapted to engage said latching-dog to prevent the lever from returning into the path of the projecting arm during a portion of the cycle of rotation of said shaft.

4. A device as specified in claim 3, in which the switch comprises a pair of contact members, a pivotally mounted contact closing member adapted to be thrown open by the operation of the cutter lever, and spring-means mounted in toggle-fashion for urging said contact closure member into either open or closed position.

5. In a strip-serving machine: a frame; a shaft journaled in said frame and equipped with astripfeeding wheel and a gear wheel; a worm wheel journaled in a gear box pivotally suspended from said shaft so that said worm wheel and gear are in driving engagement; an electric motor in driving engagement-with said worm; and means for releasably supporting said motor within the lower portion of said frame so that the motor and gear box may be swung about the shaft without being disconnected from each other.

6. In a machine of the character set forth: a frame; a shaft journaled in said frame; a stripfeeding wheel journaled on said shaft; a ratchet and pawl device interposed between said shaft and strip-feeding wheel; an electric motor geared to the shaft; a knife switch for controlling said motor; cam-means, adjustable circumferentially of said shaft, for releasing said pawl from. driving engagement with said ratchet device during part of each revolution of the shaft; and means, operable by said shaft, for automatically opening said switch after a complete rotation of the shaft.

'7. In a machine of the character set forth: a frame; a driving shaft journaled therein; a feedwheel provided with ratchet teeth, journaled on said shaft; a driving arm mounted on said shaft and provided with a pivotally mounted pawl adapted to engage said ratchet teeth; an electric motor geared to said shaft; a knife-switch for controlling said motor; arcuate cam-means adjustable circumferentially of said shaft for releasing said pawl from driving engagement with the ratchet teeth during part of each revolution of the shaft; a finger-operated member for closing said switch; and tripping-means actuated by said shaft for automatically opening said switch after disengagement of the pawl.

GISBERT LOEWENBERG.

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