US2603400A - Container end closure - Google Patents

Description

July 15, 1952 .1. A. HOLLINS HEAD CONTAINER END CLOSURE Filed Oct. 4, 1948 Jame a affmdfima 7 I N V E N T'O R Patented July 1952 H 2,603,400 CONTAINER. END CLOSURE James A. Hollinshead, Monroe, Mich., assignor to Consolidated Paper Company, Monroe, Mich a corporationof Michigan Application October 4, 1948, Serial No. 52,651

2 Claims. (01. 229-45) This invention relates to self-locking ends or closures for tubular containers, especially wherein the tubular wall may respond to some radial pressure in yielding slightly.

This invention has utility when incorporated in fiberboard, cardboard and paperboard types of containers in general polygonal or approaching cylindrical form with relatively inwardly foldable end wall portions, preferably of slightly over normal radial extent for snapping into an approximate transverse plane to provide a full endclosure. When this set-up is taken as of hexagon general form, symmetrical triangular scored portions are continuous with bases toward the tubular body ofthe container. A pair of relatively foldable lobes or sections is between the remote apices of thetriang'les. Upon collapsing of the end extension triangles toward the closure plane, the intermediate lobes are inward therefrom to leave the group of the triangles as the sole and complete end exposure for the container.

Referring to the drawings:

Fig. 1 is a perspective view looking at a closed end of a drum type of tubular container having an embodiment of the invention incorporated therewith and in closed position for an end thereof;

Fig. 2 is a fragmentary view thru .theself sealed end closure or top of the container of Fig. 1;

Fig. 3 is a partial side elevation of the empty collapsed unfilled drum of Fig. 1, showing the end age stages in charging" a container, as withhot' asphalt, with which there may. be lob-embedding in promoting container'end sealing and reinforcement.

For asphalt drums ln'the'rangeof 1 00a capacity,"

fiberboard sheets may be blanked out, say for about 22" body'length and ,withjthe similar'tri- Y angle extensions wherein theperpendicular length of the triangles approximate 6 for a drum having its cylinder diameterabb'ut 13%,". The blank in its collapsed form, as for shipping to destination to be filled, has a flat'body side I,

with parallel fold line scores 2, 3, for body side portions 4, 5,'having an overlap 'for'a stapling or seam stitching 6, parallel to the score lines 2, 3.

'The drum or container body'extendsto'anendless peripheral or outward score line I, normally transverse or perpendicular to the stitching 6 and the score lines 2, 3. Additional, also outare convergingscore lines 8, 9, in pairs in the end closure extension from the drum body, defining the several triangles II) in base continuity on the scoring 1. At the stitching 6, there is from the body portion 4 a fractional triangle extension portion II with a cut back side I2 from a tip I3 at the converging of the lines 8, 9, so that the portion II side I2 does not overhang'the score line 9 of fractional triangle portion I4 from the side 5. Also adjacent the seam or stitching 6 of the overlap, the portion I4 has a cut back side I5 from the region of the tip I3 in such proximity that the portion i4 does not overhang the score line 8. This insures that the sheet stock in its folding at the score lines is-only single ply.

At the converging tips I3 for the some lines 8, 9, of the respective triangles I0 remote from the base sides I, are lobe end or tip portions I6 of about 60 away from a perpendicular I! to the base I. This makes the portions I6 as fully tion'I8 of the score lines 9, 8, of the thereadjoining triangles I0, an inside not-penetrating cutting I9 provides a fold-defining direction to the junction I8 from an arched inward scoring line 20 extending perpendicular to the line I and thereby bisecting the region between triangle apices I3. There may be arc portions 2| from the out-limit of the line 20 connecting a portion I6 each way from the line 20, thereby completing'the lobe pair 22, 23, complementary to and reversely pointed as to the line I from the trlangles ID. The scoring 20, i9, is efiective'in determining each lobe 22, 23, to have its point at the junction I8. In the tubular set-up of the container body, following such with directing the triangles III to have their apices i3 converge, the lobes 22, 23, tend to have advance inward fold to leave exposed only the triangles I0.

The container charging or filling operation may be for a freely flowing bulk material. In

the event-such be a hot liquid-as asphalt, tend-v ing upon cooling to shrink in its transition to a. frangible solid state thru a rubbery or syrupy stage, there is a volume total lessening. I For in stance, as the collapsible end extension is peripherally continuous, flow charging may be outlett therewith the contents; sayof cooling as:

metrgical thrusting but accompanying radialre 1 lines ward beyond the score line I, say to a region 24 (Fig. Initial cooling shrinkage may develop a central'less height region 25, with a marginal less-settling more or less heavy rim portion 26. A later stage may be toward a nearly fully settled region 21. While the substance be not set to resist the firm cutting thrust of lobe pair 22, 23, at inwardlygextending'close fold; at the; score 19, 20, definite stiff edge 28 may be=moved into em.- bedding coaction 29 (Fig. 2). While this performance may be carried on with powder or more less coarse granular material, when with adhesive v property product such as asphalt, there isa supplemental sealing 39 at the 1obe,fo1d-:end !6 ,@2l,-. by the thermo plastic material;

Under the practice herein, while the end closure may be for the bottom of a tubular container.. such may have the lobe infolds toradiating ribs 28 as inwardly projecting to converge. spaced. from the apices [3. Whether or not such be left asiinwardly extending fins as major diametrical reinforcementpr be flattenedoutto beagains'ti the innensidesofathetriangles ifl there is a non: scoreregiqn of the -.-lobe tips .16, 2 l which, may carr ,an adhesive 3|. There istherebydeyeloped. a tight; sealing in the handling of powderor gram ular. material; whichmay not have the: transition a stage of-.-seal-ing as discussed for asphalt.

The snap locking .ior automatically holding thezendg closure is effected: by havingcylinder 32.. (Fig; l). of .a diameter -33,'which under the 13 dimension hereinbefore .takenas an example, may beiyvith-the;score-line sidest, S -of the triangles; in rthe range of 7". From; this itfollows, as the-.apices; I 3 are thrust inward to havethe triangles; 1 0 move. toward a common, plane therefor;

. the: somewhat,- longer. or hypotenuse; distances at theiperpendicular portions; I 6 snugly. ride againsteach-other increating-slight bulge corners, 3G in developing the hexagon type of the regular poly-- gon..;end, closure; Because this final closing op.-' eration is-desirably not taken after- .rigid {setting q of;the-contents,=-but prior thereto Whenthere isI some 5 dimension accommodation characteristics phalt,- has its syrupyflowdnfirmly to :fill the-corners; 34 asiradially reintorced,by thelobe ribs 28.

As the down thrustingpfthe. points or .apices i3' J ofthesix trianglesl Dis to an. extent for the abi1t= ting thrustingsbetweenthe lobe end arm portions 2 I .to: -ride; to,-the straight, portions J I 6,- there. iis'j shorter; radius approach to the, lines 8, 9, audit-here is {thus i a sort. of; toggle ,quickj lodging of i the, tr angles in. afcom-monplane. Even rough handling tending crumble haird'nedasphalt' in the end;- atone end-ofsaid sidesaid closure portion hav"-- corners has sifting tloeretrom almost-totally eli'm inat ed .F om the.--foregoing;;it is; to belnoted that reinbqdiment .-with special advantages. ensue when.

theltrianglesglll fo'rthej series totalgeven, sorthat gq V 7 g Y 7 ther; defined bypairsgof onve 'sineiioidTunes j there may. begalignment between score lines-8 9 of adjoiningtriangles and the score lines,9, theadjoining diametricalppposite pair of tr a glesgl l1: There is thus; achieved not only the d1.

iniorcement ion the approximately flat; end, some instancea theinward thrust of the apices l3.may. ;be;to such an extentas, to -leave the en d dished myvardslig htly jlfhis; maypccur when the hru tisemi ent xv eer ns takerup .a pr xie rm 7 atelyl a11, .orat;,. east qraiot j n R e n helfl t hr s be d seenl m a melock appr x mate .r anar. ositi n-i he f t- 9 .form a zigzag end-1esacdurse from ,th,

.. S e 1w;

fold linesriextending atright angles to said pe--- ,said baselinegextendins from .a'dj',acent baseang' of said, tr angles to said recess between said pair ,tmglg section'swithlsaid.r g t.

closure extension from the scoring connection 7. The lobe pairs 22, 23 comprise a second annular or endless series interfitting with the triangle endless series If]. At, the closure, the lobe pairs 22, 23 bond as a two-ply radially extending rib. In the adoption of symmetrical polygon form, the respective triangles are isosceles, or have the score sides$8, 9 of equal length, r r

The completed and 'filleddrum or container is reliable, may be stacked, sidewise or on end, and either end up. In adopting such general rough handling, there should be suflicient adhesion action between the contents and the container closure-and body or the inccrporatlon of the ad- ..hesivew3l... Accordingly here there is primarily a single service-container which may be stored and shipped.fiat,,.while responsive to tubular set-up with integral self-locking and self-sealing radially reinforced end closure or end closures.

The isosceles triangles it in their blank extend ondthen ind icalt u arh y.A. 5 havethe llIlflSjQIySldBSgBg-Q in the .range.rofr8% longer than. the;true radius for the ,drum, in thereby promoting the outward thrust for the corners 3% andthe medial toggle. 1 l

What; i s claimed and itr'is desired to secure. by v LettersPatent is r 1 1. Anopenended fiberboard drum and closure formed-thereby :by foldinginwardly a portion of L the .container wall adjacent said opening, said portion being defined by a peripheral fold linef thesupper edge of said drumdefining said open--- ingbeing scalloped to form a seriesof lobes, said portion includinghpairs ofconvergingly -inclined- -fold lines extendlng from' said peripheral fold line andlsaid inclinedpairs of fold lines intersecting at:points on said: scalloped edgebetween adjacent pairs of adjacent lobesot said scallops, other fold lines alternating with said inclinedpairs of ripheral fold line and-terminating'at points'between said pairsof scallops, the--lines forming the:-edges OfjSaid'SCa'HO pS extending from the point of intersectionof'said inclined fold lines being straight lines: atright anglesto adjacent "that portion forming the straight line of saiding' a scal-loped oute redge and being separated It from'said-sidesby a fold linewhich also form s T the base line of a plurality of acliacent isosceles iansleis t o s idtri r sle.sectio s bein run the1,;outeriedgesiof; sa'id lobes. connecting said j pice lcomprisinsl eh esatr eht ansls to a jacent.ccnver in ra d.lines anq then wivci'j pa. .r;.. hi add i na ;'fold'lih s" atr ght. angles 1:

of lobejs ofgsaid scalloped edge, whereby said clo' 1 0.11 .formsatf the, end. of a dylind conta -..a hat. closed end made up .of;.said

5 lobes abutting each other axially of said con- Number tainer. 1 2,053,298 JAMES A. HOLLINSHEAD. 2,224,504 2,365,704 REFERENCES CITED 5 2,393,987

The following references are of record in the file of this patent:

' Number UNITED STATES PATENTS 206,764 Number Name Date 10 505,526

534,645 Knobeloch Oct. 10, 1899 Name Date Reed Sept. 8, 1936 Milmoe Dec. 10, 1940 James Dec. 26, 1944 Harmon Feb. 5, 1946 FOREIGN PATENTS Country Date Great Britain Nov. 15, 1923 Great Britain May 12, 1939

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