US2630263A

US2630263A - Container

Info

Publication number: US2630263A
Application number: US613843A
Authority: US
Inventors: William A Ringler
Original assignee: Gardner Board and Carton Co
Current assignee: Gardner Board and Carton Co
Priority date: 1945-08-31
Filing date: 1945-08-31
Publication date: 1953-03-03
Anticipated expiration: 1970-03-03

Description

March 3, 1953 w, A, RlNGLER 2,630,263

CONTAINER Filed Aug. 51, 1945 s sheets-sheet 1 37 41 Z0 a 3 j 6 5f f2? fit Jrg/" 14/ 47 15 I, l '4o' f |llllll if 50 f7 ze\ 27 1 l W1 45 ,/Lz 34 55 26 www l INVENTOR ummm@ BY 1ML ATTORNEY March 3, 1953 w, A, RlNGLER 2,630,263

CONTAINER Filed Aug. 51, 1945 3 Sheets-Sheet 2 .I INVENTOR ai mToRNEY March 3, 1953 w, A, RlNGLER 2,630,263

CONTAINER Filed Aug. 51, 1945 3 Sheets-Sheet 5 116 jiji? INVENTOR M3 ATTORNEY Patented Mar. 3, 1953 CONTAINER William A. Ringler, Wayne, Pa., assignor to The Gardner Board and Carton Co., a corporation of Ohio Application August 31, 1945, Serial No. 613,843

6 Claims.

This invention provides a liquid tight carton or container of the knock-down type made from cardboard, paperboard or other suitable foldable sheet material.

Cartons or containers embodying the invention may be prefabricated in the form of flat, cut and creased blanks and may be assembled either manually or on automatic equipment by extremely simple assembly operations.

The carton is entirely self-locking and does not require gluing, stapling or riveting operations to maintain it in set-up condition.

A representative form of carton made according to the invention briefly comprises a bottom to which side walls are hingedly connected along fold lines forming the bottom edges of the carton. The side walls are interconnected by pairs of bellows or gusset panels hingedly connected to the side edges of the side walls, whereby liquid proofness of the container is attained. The gusset panels are folded face to face and overlie the side walls adding materially to the strength of the Walls. Lock flaps hingedly connected along the top edge of the carton overlie the folded gusset panels and hold them in carton assembled position. The lock flaps are secured in folded over position by their unique construction and arrangement, each lock ap being hingedly connected to two panels meeting at a corner of the carton. Each lock flap thus extends around a corner of the carton and resists folding up into a position in which the gusset panels would be released. The lock flaps in addition to maintaining the container in assembled position, reinforce the top edge of the container and provide a rim to which various forms of covers may be connected or locked.

i Cartons and containers according to the present invention are admirably suited for the packaging of frozen foods, ice cream and the like, particularly since they may be shipped and stored in collapsed condition, be set up when needed, and may be knocked down and flattened out for disposal after use Without necessity of tearing of container panels, pulling of staples or other time consuming or inconvenient operations.

The various objects, features and advantages of the invention will appear more fully from the detailed description which follows, accompanied by drawings showing, for the purpose of illustration, preferred embodiments of the invention. The invention also consists in certain new and original features of construction and combination of parts hereinafter set forth and claimed.

Although the characteristic features of the invention which are believed to be novel will be particularly pointed out in the claims appended hereto, the invention itself, its objects and advantages and the manner in which it may be carried out may be better understood by referring to the following detailed description and the accompanying drawings forming a part thereof, in which:

Fig. 1 is a plan view of a Afiat carton blank from which a carton embodying features of this invention may be made, the inside surface of the blank facing the observer;

Fig. 2 is a perspective illustration showing the blank of Fig. 1 after an initial folding operation in which the gusset panels at the side edges of the container are brought into face to face position;

Fig. 3 illustrates the folding of a first securing flap and the folding of a first pair of gusse panels;

Fig. i illustrates the folding of a second securing flap which holds the rst pair of gusset panels in position and the folding of a second pair of gusset panels;

Fig. 5 illustrates a further step in the progressive assembly of the container, the folding of a third securing flap to lock the second pair of gusset panels and the folding of the third pair of gusset panels into side wall overlying position;

Fig. 6 shows the completed container after folding of the last securing flap which holds the third pair of gusset panels in place and the position of the last pair of gusset panels underneath the rst folded securing flap;

Fig. 7 is a plan View of a flat blank from which a cover for the carton of Fig. 6 may be formed;

Fig. 8 is a Verticalcross section illustrating a first step in the assembly of a cover blank with the completed container;

Figs. 9 to 11 areperspective views illustrating progressive steps in the assembly and securing of the cover, Fig. 11 illustrating the completed closed container;

Fig. 12 is a plan View of a flat carton blank from which a carton having a rectangular instead of a square bottom panel may be formed;

Fig. 13 is a perspective view of the completed container made from the blank of Fig. 12;

Fig. 14 is a plan view of a flat blank from which a modified form of cover may be made;

Fig. 15 is a perspective View of the completed cover made from the blank of Fig. 14;

Fig. 16 shows the assembled cover of Fig. 15 in flat collapsed condition; and

Fig. 17 is a perspective View showing the cover of Fig. 15 on the container of Fig. 13.

In the following description and in the claims various details will be identified by specific names for convenience. These names, however, are intended to be as generic in their application as the art will permit. Like reference characters refer to like parts in the several figures of the drawings.

.in the drawings accompanying, and forming part of, this specification, certain speeic disclosure of the invention is made for the purpose of explanation, but it is understood that details may be modiedrin various respects Awithout departure-from the broad aspect of the invention.

The blank A shown in Fig. 1 is substantially square in outline resulting in a minimum of waste of material. The blank may be out and scored from a large sheet or roll of paperboard or other suitable foldable material on an automatic cutting and scoring machine; Only one side of the blank need be coated or otherwise treated tov attain liquid resistance of the stock and only one side of the blank need be decoratively finished or imprinted since one surface of the blank forms the interior surface of the assembled container and the reverse surface forms the outside.

Fig. l showsrthe blank A in-a position in Which the inside surface facesthe observer. The blank comprises a bottom panel II bounded by fold lines- I2 I3Yand I4 and I5forming bottom edges in the completed carton. The fold lines I2, I 3, I4 and I5 intersect at the four corners of the bottom panel and extend beyond thevcorners to tle'outer edges of the blank. Side wall panels I6, I1, I8 and I9 are hingedly -connected to the bottom panel II along the fold lines I 2, I3, I4 'and I5, respectively. The fold lines I2, I3, I4and I bound the side wall panels at the sides and form side edges inthe nished container.

A pair of gusset panels 2U and 2I connected along a diagonal fold line 22 are hingedly secured to the side wall panels I6 and I9 along the fold lines I5 and- I2, respectively. The gusset panel 26hasa free outer edge 23'and the gusset panel 2| has a cut outer edge 24: of limited length.

A pair of gusset panels 25' and 26 connected v along a diagonal fold line 21 are hingedly secured tothe side panels I8 and I'I along the fold lines I3 and I5, respectively. The gusset panel 25`has the free outer edge 26 and the gusset panel 25 has a.V cut edge-29 of a limited extent.

Av third pair of gusset panels and Si interconnected along a diagonal fold line 32 is hingedly connected to the side panels Hand I8 alon-g the fold lines I4 and I3. The gusset panel 30 has a free outer edge 33 and the gusset panel 3l has a cut edge 34 of-limited length.

A-v fourth pair of

gusset panels

35 and 35 interconnected along a diagonal fold line 3"! is hingedly secured to the side panels ISand i8 along the fold lines I2 and I4, respectively. The gusset panel BS-h'asaffree edge 38 and the gusset panel has a relativelyshort cut edge 3Q.

A joint lock flap 4B common t'o both the gusset panel 36 and the side wall panel I6 is hingedly connected to the two panels along a tcp fold line 4I which may be i-n alignment with 'the out

edges

39 and 23 or may be slightly spaced therefrom but parallel thereto in order to-accoinmodate-two thicknessesof gusset panels in the assembled container. The lock flap It is subdivided by a fold line I4 into a portion 49' hinged to the gusset panel 36 and a portion 40 hinged to the side Wall panel I6.

A similar joint lock flap 42 common to the gusset panel ZI and the side wall panel I9 is hingedly connected thereto along a top fold line 43. The lock ap 42 is subdivided into

portions

42 and 42 by the fold line I2 extending thereacross.

A further joint; lock flap 44 common to the gusset panel 26 and to the side wall panel l1 is hingedly connected thereto along a top fold line 45. The `lock flap 44 is subdivided into

portions

44 and 44 by the fold line I5 extending thereacross The corresponding lock flap 46 subdivided by the fold line I3 into portions 45' and 46" is hingedly connected to both the gusset panel 3l and the adjoining side wall panel IS.

The blank A as shown in Fig. l is ready for assern ly into hollow container form by simple folding operations without the necessity of gluing, stapling or otherwise mechanically adhering the panels together. The blank may be stored and shipped in dat condition or it may be folded twice along parallel fold lines, for example, along fold lines I2 and I3, or about fold lines I4 and I5 so that the side Wall panels to either side of the fold lines overlie the top surface and the bottom surface of the bottom panel I I, respectively. Thus folded, the .blank is reduced to approximately one-third of its width, which is convenient where a saving of space is of importance.

The blank A may be formed and folded into hollow container form either manually/or on simple semi-automatic equipment, as follows: The four side Wall panels i6, il, I8 and I9 are folded about the bottom fold lines I2, I3, I4 and I5 to a position substantially at right angles with respect to the bottom panel II. The folding of the side wall panels automatically causes the pairs of gussetpanels to fold about their respective diagonalscore lines into face to face position. Thus the inside surface of the gusset panel 35 comes face to face with the inside surfaceof the gusset panel 323, and the gusset panels at the other three side edges of the container are folded in like manner. The structure resulting from these folding operations is shown in Fig. 2 and is ready for the folding and securing of the folded gusset panels in locking position.

rThe locking of the four pairs of gusset panels is preferably done progressively, and may proceed as follows:

The side wall panel I8 and the gusset panel 3| are rst aligned in order to straighten the fold line `4'! along which the lock flap 46 is hinged. The lock flap 46'is then folded outwardly about the fold line 41 to overlie the top portion of the side wall panel I8 and of the gusset panel 3|. The pair of gusset panels 30 and 3l lying face to face is then swung about the fold lines I3 and I4 lying in substantial alignment until the pair of gusset panels overlies the outside surface of the side wall panel Il. This position is illustrated in Fig. 3; In the resulting structure the side wall nearest to the observer is of single thickness where the side wall panel l1 is exposed and of triple thickness where the pair of gusset panels 36 and 3I overlie the side wall panel I1. The result is in a reinforced side wall which is extremely sturdy.

After the folding of the gusset panels 30 and 3! over the side wall panel I'I the two portions 48 and 6 of the lock flap have assumed an angular position With respect to each other which prevents upfolding of the

sections

46 and 46".

The assembly of the container then proceeds by moving the pair of

gusset panels

25 and 26 about the side foldline I5 into alignment with the side Wall panel I'I as illustrated in Fig. 3. In this position the sections of the top fold line 45 along which the lock flap portions 64" and 4t are hinged are aligned permitting folding of the entire lock flap 44 outwardly so that lock flap portion 44 overlies lock flap portion 46 on the previously folded gusset panel 3| and lock nap portion 44 overlies the outside surface of the gusset panel 26. The folded

gusset panels

26 and 25 are then swung about the fold line I5 forming I aeaaeca paneljoverlies theqnarrowfsidawall panels 96 anda91, whereasthe tipportions of the pairs of triangular panels varefolded vagain to overliethe pairs of gusset 4panelsfolded Aover-the wide` side walls.-

The yassembled container isshown in Fig. 13.

Theopposite narrow side walll of the containeris reinforced by thegusset panels and |0| whose tip portion overlies -the -gusset panel |09 and ||0 reinforcing the large sidewall 93.

The-.container of Fig. 13 maybe closedby a coversimilar to that illustrated in Figs. to 11 having atop panel of appropriate rectangular outline.

However, covers may also -be preassembled to simplify the roperations of vattaching the cover to the container. Such a cover will now be described.

The-.blank D corresponds in outline to the cover blankB of Fig. 7 with the exception that only two tuck flaps are provided in opposite sides of the blank, the remaining two flaps being shortened to form securing flaps. The blank D is subdivided'by fold lines ||6 and H6 and I I9 into a top panel |20, narrow side flange panels |2| and,|22, wide,sideiflangegpanelsl and |24 and pairs of vgusset'panels |26v and |26, |27 and |28, |29 and |30, and; |3| and |32. Tuck naps |33 and |34 subdivided by foldlines |35 and |36 are hingedly connected to the side flange panels |23 and |24 along Yfold lines |37 and |38. Securing naps |39and |40are hingedly connected to the narrow side flange panels l2 |22 along fold lines |4| and |42.

The setting up of the cover from the blank D proceeds by folding of the narrow and the wide side flange panels about their respective fold lines into a position at right angles with respect to the top panel |20. Substantially simultaneously the pairs of gusset panels at the four corners'of the blank are folded face to face and over the inside surface of the narrow side iiange panels |2| and |22. The securing aps |39 and |40 are then folded about their respective fold lines |4| and |42 to overlie thefolded gusset panels and lock the same in place. The securing flaps |39 and |40 are then secured to the side flange panels |21 and |22 by staples |45 and |46 or the like.

The assembled and stapled cover of Fig. may be collapsed by pulling the narrow side nange panels |2| and |22 outwardly, whereby a collapsed at structure D' is formed illustrated in Fig. 16. In the'collapsing of the cover the gusset panels |20, |21, |30 and |3| slide from underneath the securing -flaps |39 and ille which are resilient by reasonof being stapled approximately at the center.

The 'collapsedilat cover D. requires `a of space for-storage andshipment and mayeasily be set up simply-by tucking the unlatched .gusset panels |26, |23, |30 and |3| back under the ends of the .respective-securing naps |30, |40.

The set up cover D may be attached to the container of Fig. i3 by rstinserting the tuck flap |33 underneath the rim of one wide container side panel. The cover is then telescoped over the top ofthe containerand secured by tucking the opposite tuck flap |34 underneath the rim on the other wide side wall panel.

After securing of the cover D" to the container the pull tab |913 extends downwardly from the tuck flap |34. The cover may be removed simply by pulling the tab 43 downwardly, whereby tuck flap |35 is pulled out from underneath the container rim, and by then pulling the fiap upwardly, whereby the cover D is removed from thecontainer top. l

A similar pull tab may of course be provide on any of the four tuck flaps of the cover made from blank B and illustrated in Figs. 7 to 11. It will operate in the same manner as .described-in connection with the reassembled cover D.

The invention thus provides a liquid tight container of extremely simple and rugged construction which may be set up, filled and closed either manually by unskilled operators or be handled on automatic or semi-automatic equipment. rIhe container is very sturdy due to the reinforcement of the side walls and the top edge. It possesses the advantage of being easily knocked down after use. f

No glue or staples are required for assembling the container which is entirely self-locking due to its peculiar construction. The container may be produced in convenient multiple size series, for example, as 21/2, 5 and 10 gallon containers which are easily packed and stocked due to the fact that the container of nekt smaller size has only one dimension reduced, for example, the width of one side wall.

The invention of course is not limited to the specific formsof blanks illustrated in the drawings. The blanks may be modified in various ways without changing the principal features of the construction. Cartons having more than four side walls may be constructed in accordance with the invention. In Fig. 1 out

edges

234i, 29, 34 and 39` are provided on the gusset panels 2|, 26, 3|, and 36. The lockflaps 42', di', d6' and 40 may of course be extended-to the corners of the blanks to eliminate the cut edges without detracting from the advantages of the blank. Also the lock lfiaps identiiied by several primed reference numerals may be shortened somewhat.

Containers may of course be constructed in which each side wall is reinforced by more than one pair of gusset panels folded thereover, as it is the case with the narrow side wall panels 96 and 9i of the container of Fig. 13. All that is required to produce such a container is a narrowing of the side wall panels 93 and 09 of Fig. 12 and the provision of additional fold lines similar to lines ||2 and |53 across the other two pairs of gusset panels. The result is a tall container of extreme rigidity.

These and various other modifications of the blank as well as numerous other changes, additions, omissions and substitutions may be made by persons skilled in the art without departing from the spirit and teaching of the invention.

What is claimed is:

1. Ina carton a first, a second and a third wall panel extending` at angles with respect to each a. side edge of the container into a position in which the folded gusset panels and 26 overlie the side wall panel I9. This folding operation causes folding of the two portions of the lock flap 44 about the fold line I5 whereby the portion 44" overlying the gusset panels 30 and 3| is fixed in position.

In the further stages of the assembly the gusset panels 23 and 2| are aligned with the side wall panel I9, the lock flap 42 common to the side wall panel I9 and the gusset panel 2| is folded outwardly to overlie the last folded pair of

gusset panels

26 and 25, locking the gusset panels in position. The gusset panels 2| and 23 are then swung about the fold line I2 forming a side edge of the container until the gusset panels 2| and 23 overlie the side wall I6.

The lock flap common to the side wall panel I6 and the gusset panel 36 is then folded outwardly to overlie and lock the last folded pair of gusset panels 2| and 23. The

gusset panels

35 and 36 are then swung about the aligned fold lines I2 and I4 until they overlie the side wall panel I8. Finally the folded

gusset panels

35 and 36 are tucked under the lock flap 49 whereby the assembly of the container is completed.

The finished container is shown in Fig. 6. It has a square bottom panel and four side Walls reinforced by pairs of gusset panels. Each pair of gusset panels is locked by lock flaps which in Blank B comprises a top panel bounded 'f by

fold lines

5I, 52, 53 and 54 forming top edges in the completed cover.

Flange panels

55, 56, 51 and 58 are hingedly connected to the top panel 50 along the

tcp fold lines

5I, 52, 53 and 54 respectively. The cover flange panels are ini terconnected at their ends by pairs of gusset panels. A pair of

gusset panels

59 and 60 hinged along a diagonal fold line 6| connects

flange panels

55 and 58. A pair of

gusset panels

62 and 63 hinged along a diagonal fold line 64 L connects

flange panels

58 and 56. Further pairs of

gusset panels

65, 66 and 68, 69 connected along

diagonal fold lines

61 and 10, respectively, lie at either end of the ange panel 51 and connect it with the

flange panels

56 and 55, respectively.

Tuck flaps 1|, 12, 13 and 14 are hingedly connected to the

flange panels

55, 58, 56 and 51 along

fold lines

15, 16, 11 and 18, respectively. Each tuck fiap is preferably subdivided into two relatively narrow portions by

fold lines

19, 80, 8| and 82, respectively, running lengthwise of the tuck iiaps. The side edges of the tuck fiaps are preferably cut at an angle as shown at 83, 84, 85, 86, 81, 88, 89 and 98.

A cover made from the blank B may be attached to and assembled on the container of Fig. 6 as follows: The tuck flap 14 of the cover is first tucked under the rim of the container formed in part by the tuck flap 46". The blank is then folded about the fold lines 18 and 53 so that the flange panel 51 overlies the outside of the container rim as shown in Fig. 8. The top panel 58 is then placed over the top of the container as illustrated in Fig. 9 and the sections of the tuck flap 13 are tucked under the rim of the container formed in part by the lock flap 44". While the tuck flap 13 is being tucked underneath the container rim, the

gusset panels

65 and 66 are folded about their common fold line 61 and folded underneath the flange panel 66 which overlies the rim of the container. The tucking in of the tuck flap 13 is facilitated due to its subdivision into two narrow sections by the fold line 8|.

Thereafter the

gusset panels

62 and 63 are folded about their common score line 64 and folded under the flange panel 58 which is then folded downwardly about its score line 54 to overlie the rim of the container formed in part by the lock flap 42". The flange panel 58 is then secured in position by the lock ap 12 which is tucked underneath the container rim. Fig. 10 illustrates the stage of assembly of the top at which the tuck flap 12 is being tucked under the rim of the container.

The assembly of the cover and the closure of the container is finally completed by downfolding of flange panel 55 about its fold line 5I. Substantially simultaneously the gusset panels at either end of the flange panel 55 are folded underneath it and the flange panel is then secured in position by tucking of the lock flap 1| underneath the container rim formed in part by the lock flap 40".

The closed container with completed cover is shown in Fig. 1l. It holds its cover securely for shipment and may be opened conveniently without any tools by pulling out any one of the four tuck flaps from underneath the rim of the container, whereafter the cover may be removed in a manner corresponding its assembly.

The invention is not limited to containers of polygonal or square bottoms. Figs. 12 and 13 illustrate the application of the invention to a container whose bottom panel is rectangular. The bottom panel 9| of the blank C is bounded by

fold lines

92, 93, 94 and 95 along which

side Wall panels

96, 91, 98 and 99 are hingedly connected. The side wall panels are connected by pairs of gusset panels hinged to their respective side edges. Gusset panels |00 and I9! hinged along a common diagonal fold line |02 connect

side wall panels

96 and 99. Similar pairs of gusset panels |03 and |04, |06 and |01, |09 and ||0, hinged along diagonal fold lines |05, |98 and I I I respectively, connect the

side wall panels

99 and 91, 91 and 98, 90 and 96, respectively.

The gusset panels |00 and |0| are further creased along fold lines I|2 and IIS extending parallel to fold lines and 92, respectively. The distance between the fold lines 95 and I I2 and the fold lines 92 and I I3 is equal to, or slightly larger than, the width of the narrow side wall panel 96. A similar pair of additional fold lines |I4 ziil ||5 run across the gusset panels |86 and Lock fiaps IIS, II1, |I8 and ||9 are hingedly connected to the panels I I0 and 96, |0| and 99, |04 and 91, and |91 and 98, respectively. Each lock flap is common to two panels which in the completed carton form an angle with respect to each other.

The assembly of a container from the blank C proceeds in accordance with the assembly of the square container of Fig. 6 from the blank A of Fig. l. The only distinction in the assembly is the double folding of the pair of gusset panels |00 and IOI and the pair of gusset panels |05 and |01 so that the major portion of the gusset other and forming two corners of said carton, pairs of gusset panels hingedly connecting the sides or the first and second and the second and third wall panels respectively, a first joint lock flap hingedly articulated to the top edges oi the lfirst wall panel and the adjacent gusset panel of the rst pair of and a second joint lock 'flap hingedly articulated to the tcp edges of the second wall panel and the adjacent gusset panel of the other pair of gusset panels, the portions of said lock naps articulated to said side walls extending substantially throughout the length of said side walls, said pairs of gusset panels each 'folded to overlie said second and third wall panels respectively, said first joint lock flap being folded outwardly and downwardly over said first side wall and extending around the side edge of the carton between said iirst and second wall panels with the portion oi the lock flap articulated to said irst mentioned gusset panel overlying its articulated gusset panel and said second side wall, second loci; flap being folded outwardly and downwardly over the gusset articulated portion 'of said first joint lock ilap, said rst mentioned folded gusset panel. and said second side wall, with the portion or said second lock nap articlilated to said other adjacent gusset panel extending around the side edge of the carton between said second and third side walls and overlying its articulated gusset panel and said third side wall.

2. A polygonal liquid tight container from a single sheet of stock and consisting of bottom panel, side wall panels hingedly conto said bottoni panels, pairs of gusset panels hingedly connected to adjoining side wall panels along side fold lines, a joint lock flap hinged-ly connected to the top edge of each side wall panel and to an adjoining gusset panel at one end of each side wall panel, there being but one portion of a joint lock flap connected nwardly over the walls to which they are con- 1 and extending around. the side edges of the container with the portions of the lock ilaps articulated to the adjacent gusset panels overlying the gusset panels to which they are articulated, the other gusset panels of said pairs and the side walls which the folded pairs of gusset panels overlie, said pairs oi gusset panels and said joint lock ilaps being so folded that the portion of each lock nap articulated to a side wall also overlies the folded over pair of gusset panels lying along that side wall and the folded over portion of the lock ilap articulated to the outermost one of the said last mentioned pair of gussets.

3. The structure claimed in claim 2 wherein said bottom panel is square, and there are four side wall panels hingedly connected to the bottom panel and four pairs of hinged gusset panels.

4. The structure claimed in claim 2 wherein said bottom panel is rectangular, and there are two narrow and two wide side wall panels hingedly connected to the bottom panels, and wherein the pairs of gusset panels overlying the narrow side wall panels are additionally folded about the far side fold lines of said narrow panels so as partly to overlie the pairs of folded gusset panels overlying the succeeding wide side wall panels, the lock ilaps hingedly connected to the wide side wall panels additionally overlying folded over portions of the pairs of gusset panels initially overlying said narrow panels.

5. A liquid tight covered container comprising, in combination, a container body and a container top attached thereto, said container body consisting or" a bottom panel, side wall panels hingedly connected to said bottom panel, pairs or" gusset panels hingedly connected to adjoining side wall panels along side told lines, a joint lock flap hingediy connected to the top edge of each side wall panel and to an adjoining gusset panel at one end oi each side wall panel, there being but one portion of a joint lock iap connected to the gusset panels of each pair of gusset panels, the portions of said loch naps articulated to Said side wall panels extending substantially throughout the length of said side walls, said pairs of gusset panels each folded to overlie a different side wall of the container with the gusset panel of each pair to which a portion of a lock flap is hingedly connected outermost, said joint lock flaps being folded outwardly and downwardly over the walls to which they are connected and extending around the side edges of the container with the portions of the lock aps articulated to the adjacent gusset panels overlying the gusset panels to which they are articulated, the other gusset panels of said pairs and the side walls which the folded pairs of gusset panels overlie, said pairs of gusset panels and said joint lock flaps being so folded that the portion of each lock flap articulated to a side wall also overiies the folded over pair of gusset panels lying along that side wall and the folded over portion ci the lock flap articulated to the outermost one of the said last mentioned pair of gussets, said container top comprising, a top panel, side flange panels hinged to said top panel, and tuck flaps hinged to at least two opposite flange panels and tucked under said lock flaps of the container body.

5. The structure claimed in claim 5 wherein said container top includes a pull tab cut from the body or one of the side flange panels and the tuck flap attached thereto, said pull tab being hingedly connected to said last named tuck flap.

WILLIAM A. RINGLER.

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

UNITED STATES PATENTS Number Name Date 265,985 Seabury Oct. 17, 1882 847,314 Burns Mar. 19, 1907 912,263 Potter Feb. 9, 1909 1,046,945 Bauer et al Dec. 10, 1912 1,226,024 S-tohs et al. May 15, 1917 1,369,634 Don Feb. 22, 1921 1,713,872 Ortiz June 25, 1929 1,311,478 Seckendorf June 23, 1931 1,928,792 Ottinger Oct. 3, 1933 1,980,667 Daley Nov. 13, 1934 2,330,262 Biggs Sept. 28, 1943 2,395,363 Williams Feb. 19, 1945 FOREIGN PATENTS Number Country Date 530,989 Great Britain Dec. 27, 1940