US1437274A - Paper box construction - Google Patents

Description

H. B. SMITH. PAPER ox- CONSTRUCTION. APPLICATION FILED JUNE I, l9l8. lRENEW-ED FEB. 24. '1920.

Patented Nov. 28, 1922.

` |NvENToR f'afymaf? ATTORNEY HARRY Barner/IAN slvirrir, ornnooarvn, NEW vom;

PAPER :Box CONSTRUCTION. y.

Appncation mea June i, 1ers, serial No. 237,709.

To aZZwwf/n t may concern: 4 y

-Be it known that I, AHARRY BRIDGMAN SMITH, a'citizen ofk the United States, r e` siding at Brooklyn, in the county of Kings Vand State of New York, have invented new and useful Improvements in Paper B ox Constructions, of which the `following is ak specification.

vThis inventiony relates to lmprovements in paper box construction, and pertains morey particularly to covered paper box shells.A

yThe :present invention has for its object the production of acovered box shell or box member by an assembly of box blank and covering sheet or blank in such form as kto simplify and expedite the manufacture of the covered shellor member andi'enable the manufacturing cost t0 bel-greatly decreased, and the daily output greatly increased.

This result is obtainable by reason of "the fact thatI have discovered" an entirely new continuous method `offproviding\ an i, as-r sembly of box and covering blank which greatly simplifies themethod yofip'roducing the covering blanky used in `providing 'the shell formation. v

A distinguishing characteristic. .of the covered box of my present invention liesin the fact that/.free portions of the covering blank carried by an upstanding wall ofthey shell are adhesively attached to the exterior faces of adjacentfwa'lls of the shell, thus locating 'such portions as an. external cover.- ing element for the wings'of thelatter walls, theseportions thus overlying the'corner pro- .dueedby thejmeeting wings. VAnother distinguishing featurel of the present invention is the production of an embryo box as' semblyy of the covering and box blanks, this assembly` being provided in the flat this permits of the production of'successive ias# sembliesy in amore,l or less continuous operation and in a form adapted for the succeeding operations incompleting the'shell formation.

tions of 'the covering'blank are of a twoply formation at the marginal yedge portions of the open shell. Sofaras I am aware, I am the rst to produce a shellcons'truc tion or apply a covering-blank in this way.

'Io-thes'e--andl other ends, the nature kof which will be readily understoodas the invention ishereinafterdisclosed, said invention consists in the-improved 'construction f other ways, claims forv a particular `method plication.

Another characteristic lies in z the fact that these externally-applied-por-l Renewed February 24,1920. Serial No. 360,765. y

and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawings, and more particularly pointed out in the appended claims. q

In the accompanying drawings, in which4 similar reference characters indicate similar parts in each of the vieWs:- v 'Fignl's a perspective view illustrating the initial stagesof one way ofassembling a boxblank ywith its covering blank in accordance witht the method which I have' discovered. l

FigsfZ to 4 are perspective viewsshowing stages 'of the shell manufacture. l Fig.l 5 is a perspective view of a'completed shell. y v Aboxfhaving thecharacteristics `of the present invention is illustrated' in -Fig.

n -5,"but I:tor the purpose of more clearly indicating these characteristics, I will vfirst describe a preferred .way in which" the shell of Fig. 5 may be produced,it being understood," however, that the shell 'may bel formed in as' such being 'reserved -for a companion ap?,

In the preferred' method," the covering blank is initially in the form of a web or sheet l() having av width in excess of one of the.l dimensions of the iiat box blank. yIn the vdrawings I hawel shown this ydimension asthat corresponding to the lengthof the shell, ybut this kmay obviously `be reversed."

Web' or sheet lOhas oneof its faces coated with adhesive, andonthisjface are placed successive box lblanks ll'while the latter as well alsthe webfarej'fl'aathese blanks being shown as of the usual simple v:torni of box blank having a body *portion 4a, side wings a and end wings a2@ These box blanks are arranged spaced apart from each other at approximately lequal distances, with jthe longitudinal edges of the blank extending at substantially fright. angles t0 ,the direction n of length of the web, thus practically spotting the flat box blanks on the adhesivelycoated face of 'the web,fasshown.at A in As will'beseen, this spotting serves to space the endwings of the box blank from the edges of the webl and' from'each other,

' and the succeeding'fstage of the asssfemblyiis that of turning overfthese lmargins of the web over theedg'esof and onto the top faces of the positioned blank orlbla'nks, thus leans` sol ing the margins to extend over and be adhesively secured to the exposed faces of the end Wings of the box blank or blanks. Since this infolding of the Web margins is continuous throughout the length of the web, the portions of the web margins which do not overlie the box blank end, Wings extend in overlying relation and are adhesively secured to the portion o-f the web. adjacent these margins Which are not covered by the spotted box blank, thus giving a twoply structure at these marginal portions, this general operation being, shown at B in Fig. 1.

There is thus provided a web having spotted box blanks at regularly spaced intervals in the directionl ofv length of the web with marginal portions turned over on to the endk Wings of the, box blank.

The succeeding operation `isthat of slitting the Webto provide for they formation of certain free iaps or laps in the covering blank, the slits for this purpose extending longitudinallyr ofthe web substantiallyT on lines corresponding tothe ends of the side Wings of the positioned blanks, as for instance indicatedv at 12 in Fig.'1, these slits extending 'from an end of the end Wing of one positioned blank to the opposite end of the end yWing of' thev adjacent positioned blank, the slits extending parallel to the edgesof theY web,producing\a structure such as shown at -C in Fig. 1

,The web` is. then divided transversely intermediate adjacent box4 blanks, as for instance on the line 13 of Fig. 1, the separated assembly corresponding tol Fig. 2 of the drawings Withthe exception that the marginal portions 14 of the covering blank thus producedy are still in the flat, these portions 1l being provided bythe web material between adjacent' spotted box blanks. And

it mayl be noted that in spotting the 'box blanks, the distance between adjacent blanks ismade sufficient to provide forthese marginal portions 1t-=for each blank.

These marginal portions 14 are then turned in, the` result being that each of the Wings off-'the boxblank-Which form the upstanding Walls of the box-.have their marginal edgesy coyered-thus completing the finish, of thesemarginal portions-While the blanks are still. in the, flat- Atthe same time therefare produced free flapsl of the covering blankf-alsofin the flatthese. flaps being theresult of the presence of slits 12.

f This'constructionj provides' 'an embryo box assembly of the blanks-an assembly provided in theiflat-#Which may be produced as a' product complete in itself ready to be fedi or transported to i apparatus, forl the formationof the i'inishedbox. AsfarA as l am aware, 1 am the first,- to; provide an embryo box assembly otv the; character stated Wherefn the; @over blanke has; been completely ap.-

plied to the box blank with the marginal portions inturned and aiiixed While the as selnbly is substantially flat. l

Depending upon the character of the box to be produced, the marginal' portions 16 of the end Wings will be provided with an adhesive coating on the upper surface. lf the shell is to be utilized in the formation of a neck box, this adhesive coating Will extend throughout the length of this marginal portion 16, and. the upper surfaces of marginal portions 14: will also be similarly coated'. lWhere, however, the shell is to be utilized otherwise, this adhesive application is practically limited to those portions of margins 16 which overlie flaps 15. This application of the adhesive coating-toy these margins may be provided While the covering blank is in web form or after the latter has reached the embryo assembly stage.

After the embryo assembly has been made as in Fig. 2, the side Wings-the Wings Which do not carry flaps 15 are folded into upstanding position, as in Fig. 3, after Which the end Wings-carrying flaps 15-are folded to the upstanding position, producthe structure ofFig. 4l. Flaps 15 are then folded into contact with the outer or exterior faces ofthe upstanding side Wings, thus completing `the box 'formation` with flaps 15 adhesively secured to the external face of the side Wings, as in Fig, 5.

is Will be readily understood, the depth f margins 16 is dependent on the depth of the fold made at the marginsY of the web, and this may obviously be to an extent suflicient to overlie the entire surface Aof the end Wings. lt will be understood, ofcourse, that for the purpose of uniformity, margins 14 should extend to a corresponding point with respect to the side wings, and this latter will be controlled by the spacing of' the spotted box blanks. Y

ln the dratvingsl have shown flapsr 15 as carried by the end Wings, but it Will be. obvious that they may becarried by the side Wings, in which caseY 'they `would be applied to the' outer faces of the end Wings, this change resulti u box blanks with the direction of length .extending longitudinally instead of trans veisely of the web. ln either case, how` ever, thereuis presented a structure in which. a of the assembly carries a covering blank flap or `lap Which is applied to the external covered face of adjacent Wing When both Wings are in upstanding position, the flap forming the outer ply of the Wing to which it isattached.

As will be seen, each flap 15 has at lea-st that marginal portion which is located at the open top of the completed shell of ativoplyl formation, the extentv ofthedoub'le `ply structure depending upon the depth` of marbv simply .spotting the lll ri gin 16. As a result, the connections between adjacent wings at the marginal edges -of the open top of the shell are reinforced; by increasing the depth ofinturning of margin 16, the depth of this two-ply construction will be correspondingly increased.

It is to be understood that I prefer to locate the flaps l5 at an end--or sideof the shell on the same wing, thus providing for simplicity of production and of assembly, but it will be understood that the invention is not limited in this respect, since I may obviously arrange the flaps in other locations.

As heretofore pointed out, the invention is not limited to the stage production herein disclosed, although this is preferred because the various operations required to producethe described assembly may be carried on continuously and at great speed as comparedwith other methods known to me.

This general construction is adapted for use in connection with an ordinary shell or box member, or it may be utilized in connection with the production of a neck7 box, by the insertion therein of the usual neck strip which, when employed, will be held in place by the marginal portions 14; and 16 being adhesivly coated as heretofore indicated. And while I have shown fla as l5 as of alength less than that required to completely cover the external face of the wing to which they are adhesively attached, it will be understood that these lengths of iaps may be increased even to a point where they completely cover the wing face, and this can be provided in practicing the method disclosed in Figs. l. to 4t by increasing the distance between spotted blanks to a point where the distance between the Opposing ends of the end wings of adjacent blanks will equal the length of the wing to be covered. In such case, the excess material between adjacent blanks over that required to produce the desired margin 14 may be readily removed at the time when the web is being severed.

While I have herein shown and described several forms of the present invention and various ways in which it can be produced, it will be readily understood that changes and modifications therein may be found desirable or necessary in meeting the exigencies of use, and I desire to be understood as reserving the right to make any and all such changes or modifications as may be found desirable or essential, in so far as the same may fall within the spirit and scope of the invention as expressed in the accompanying claims when broadly construed.

Vhat I claim is y l. A covered box shell comprising a box blank and a covering blank assembled to produce a shell with upstanding walls, said covering blank including a Hap extending in tegrally' from one wall and adhesively se` cin-ed to the exterior face of an' adjacent wall, said flaps including a two ply structure forming a reinforce at the juncture of the walls. j

2. l covered box shell comprising a box blank and a covering blank assembled to produce a shell with upstanding walls, said covering blank including flaps each overlying the points of juncture of said walls and adhesively secured to external faces ofbox walls, each flap including a two-ply format-ion acting as a reinforce at the junction point which it overlies.

3. er covered box shell comprising a box blank and a covering blank assembled to produce a. permanently set up7 shell with upstanding walls, said. covering blank including a wingr and iiap of substantially equal width and. of greater width than the wall to which the wing is applied to permit the wing to overlie the marginal edge of and extend on to the inner face of such wall, said flap being folded into multi-ply forma-- Vtion on a line approximating the marginal edge of the wing and being applied to the exterior face of an adjacent wall, the folded flap forming a two-ply formation adjacent the marginal edge of the wall to which it is secured.

l. An embryo assembly for covered box shells comprising a box blank and a covering blank adhesively secured in superposed relation with the box blank in the flat, said box blank including wings, said covering blank having portions folded to overlie marginal edges of an be adhesively secured to opposite faces of the wings, said covering blank also having free flaps of multiply formation extending from opposite ends of predetermined wings of the box blank and adapted for adhesive connection to the exterior faces of adjacent wings when the assembly is folded to box formation.

5. A paper box blank adapted for production by a continuous method as described, and comprising a shell blank having rectangular side and end wings of equal width and a cover blank to which the shell blank is adhesively secured in facial rcontact throughout the entire extent of the shell blank, the cover blank having wings overlying two opposite shell wings and other wings secured to the other two opposite shell wings and having' flaps of substantially the same width as the shell wings and extending beyond the ends of said shell wings and severed from adjacent ends of the cover wings secured to the first named opposite shell wings, the blank being arranged for folding into box form with said fla-ps adhesively secured on the outer surfaces of the cover blank overlying the shell wings first mentioned to act as corner stays.

6. A paper box structure comprising a shell blank having side and end Wings ends of the underlying` shell Wings and of turned up at a right angle to the central substantially the saine Width as said Shell bod57 portion, and cover blank adhesvely wings, said flaps being turned about the box- Secured to the shell blank in 'facial Contact corners and adhesively secured to outer sur- 5 throughout the entire extent of the shell faces of the @over material overlying the 15 blankg Said cover blank lin-ving side Wings first named Shell Wings. overlying` two opposite shell Wings, and also ln testimony whereof I have hereunto set having other Wings overlying the other two my hand. opposite shell Wings, said last-named cover v 10 Wings having end flaps extending beyond the HARRY BRIDGMAN SMTH.

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