US3825169A

US3825169A - Paperboard container and blank therefor

Info

Publication number: US3825169A
Application number: US00273838A
Authority: US
Inventors: G Meyers
Original assignee: American Can Co
Current assignee: Georgia Pacific Consumer Products LP
Priority date: 1972-07-21
Filing date: 1972-07-21
Publication date: 1974-07-23
Anticipated expiration: 1991-07-23
Also published as: CA990254A

Abstract

A paperboard container and blank therefor wherein the container is formed having tapered double thickness side walls and corner configurations wherein superimposed tabs extend from one of two adjacent side walls to adhesively bond to one side of a second adjacent side wall to thereby provide double thickness of material at the corner. One thickness of the second adjacent side wall is cut out co-extensively with the tab next adjacent thereto into which the tab is recessed thereby providing three thicknesses at the overlap of the corner connection.

Description

United States Patent [191 Meyers [451 July 23,1974

PAPERBOARD CONTAINER AND BLANK THEREFOR Inventor: George Leroy Meyers, Menasha,

Wis.

Assignee: American Can Company,

Greenwich, Conn.

Filed: July 21, 1972 Appl. No.: 273,838

US. Cl 229/34 A, 229/35, 229/34 R Int. Cl B65d 5/22 Field of Search 229/34 R, 34 A, 35 MF,

References Cited UNITED STATES PATENTS 3/1929 Coale 229/3.5 MF 6/1937 Schmidt 229/34 R 2,366,602 1/1945 De Haven 229/34 A Primary Examiner-William 1. Price Assistant ExaminerDouglas B. Farrow Attorney, Agent, or Firm-Robert P. Auber; F. Stanley Charlton; Joseph J. Orlando [5 7 ABSTRACT A paperboard container and blank therefor wherein the container is formed having tapered double thickness side walls and corner configurations wherein superimposed tabs extend from one of two adjacent side walls to adhesively bond to one side of a second adjacent side wall to thereby provide double thickness of material at the corner. One thickness of the second adjacent side wall is cut out co-extensively with the tab next adjacent thereto into which the tab is recessed thereby providing three thicknesses at the overlap of the corner connection.

20 Claims, 18 Drawing Figures PATENTED JUL 2 31974 .suztraore PAPERBOARD CONTAINER AND BLANK THEREFOR The present invention generally relates to improvements in the construction of paperboard containers and the blanks from which such containers are manufactured. More particularly, the present invention relates to an improved container construction, the container being produced from a novel paperboard blank configuration wherein provision is made for substantially increasing the strength of the container.

The packaging industry has long struggled with the problem of providing a strong, durable container that combines structural integrity with low unit cost and relative ease of rapid assembly. This is particularly true in the food packaging industry where the foods generally packaged and displayed are relatively inexpensive thus requiring an inexpensive containeror tray for packaging or display purposes. Thus, paperboard as well as other fibrous materials have come into extensive use in the food packaging industry because of the inexpensive nature of the material and the ease with which such material can be folded and formed into the desired configurations by automated machines. In order to alleviate the problem of deterioration of the fibrous material resulting from the absorption of moisture and other food juices, the interiors of paperboard containers and trays are treated or laminated with an impervious material such as metallic foil.

Foil laminated paperboard trays are widely used in institutional baking such as in schools, hospitals, etc., where the goods are baked in the tray and afterwards displayed in the same tray. It is the usual practice for such containers to have the metallic foil covering both the inner and outer surfaces of the container side walls for the purpose of hiding scorched portions of the paperboard. It has been found that the best way of accomplishing this is to fold the laminated blank to produce a double thickness at the side walls wherein the metallic foil covers both the inside and outside surfaces of the side walls.

However, this type of tray construction presents problems in forming corner connections. In particular, the range of adhesives which will adequately bond foil to foil surfaces is substantially smaller than the range of adhesives which will adequately bond paperboard to foil surfaces. Also,'adhesives which will bond foil to foil are substantially more expensive than adhesives for bonding paperboard to foil. Therefore,.it is economically necessary that the corner connections provide a bonding arrangement of paperboard to foil. Thus, the usual corner connection is provided with a construction wherein a tab extends from either the inside or outside panel of one of two adjacent side walls and has the paperboard surface thereof bonded to the other adjacent side wall in proximity to the corner. The corners of such trays thus have a single thickness of material and are therefore the weakest points of the tray or container construction. This obvious point of weakness in the construction of such containers is amplified by constructions wherein the side walls are tapered. It has been found through experience that corner connections of such containers are apt to fail when sufficient pressure is applied to the tapered side walls and, in particular, failures have often occurred during shipment of stacks of containers where the side walls of the lowermost trays are'subjected to the greatest pressure.

It is, therefore, a primary object of the present invention to provide a paperboard container construction and blank for making the same wherein the configuration of the corners of the container is such that the container has improved resistance to failure thereat.

The above object, as well as others which will hereinafter become apparent, is accomplished according to the present invention by providing a paperboard 'or other fibrous material blank which is foldable into a container having double thickness side walls, formed by folding the blank at the periphery thereof, and corners having a configuration wherein a pair of superimposed tabs extend from one of two adjacent side walls to adhesively bond to one side of the second adjacent side wall thereby providing a double thickness of material at the corner. One material thickness of the second adjacent side wall is cut coextensively with the tab next adjacent thereto and the tab is recessed into the cut-out and adhesively bonded thereto thereby providing three thicknesses of material at the overlap of the tabs and side wall. The tab overlying the tab recessed into the cutout portion of the side wall extends therebeyond and is adhesively bonded to the side wall. Where the paperboard blank is to be folded into a container laminated with a metallic foil on one side thereof, thus resulting in a container having metallic foil extending throughout the interior of the container and both the interior and exterior sides of the side walls, the provision of the superimposed extending tabs and cut-out portion of the side wall to which the tabs are adhesively bonded insures adhesive bonding wherein at least one of the bonding surfaces is paperboard.

The present invention will be described and understood more readily when considered together with the embodiments shown in the accompanying drawings, in which;

FIG. 1 is a plan view of a paperboard blank foldable into a container according to the present invention;

- FIG. 2 is a plan view of the paperboard blank of FIG. 1 having portions thereof folded;

} FIG. 3 is a perspective view of the container according to the present invention produced from the blank of FIG. 1;

FIG. 4 is an enlarged perspective view of a portion of the corner of the partially folded container formed from the blank of FIG. 1;

FIG. 5 is an enlarged partial cross-sectional view of the container of FIG. 3 taken along line 5-5 of FIG.

FIG. 6 is an enlarged partial cross-sectional view of the container of FIG. 3 taken along line 66 of FIG. 3;

FIG. 7 is a plan view of a blank similar to the blank of FIG. 1 in a slightly modified form;

FIG. 8 is a plan view of the blank of FIG. 7 having portions thereof folded;

FIG. 9 is a perspective view of the container produced from the blank of FIG. 7;

FIG. 10 is an enlarged perspective view of a portion of the corner of the partially folded container formed from the blank of FIG. 7;

FIG. 11 is an enlarged partial cross-sectional view of the container of FIG. 9 taken along line ll'-ll of FIG. 9;

FIG. 12 is an enlarged partial cross-sectional view of the container of FIG. 9 taken along line l2l2 of FIG.

FIG. 13 is a plan view of a blank similar to the blank of FIG. 1 in a slightly modified form;

FIG. 14 is a plan view of the blank of FIG. 13 having portions thereof folded;

FIG. 15 is a perspective view of the container pro duced from the blank of FIG. 13;

FIG. 16 is an enlarged perspective view of a portion of the corner of the partially folded container formed from the blank of FIG. 13;

FIG. 17 is an enlarged partial cross-sectional view of the container of FIG. 15 taken along line 17-17 of FIG. 15; and

FIG. 18 is an enlarged partial cross-sectional view of the container of FIG. 15 taken along line 1818 of FIG. 15

Referring now to the drawings wherein several embodiments of the present invention are illustrated, FIGS. 1 through 6 depict a first embodiment wherein an open tray type of container, generally designated 20 in FIG. 3, is shown. Container 20 is formed from a generally rectangular blank, designated 22 and shown in FIG. 1, which may be made from a suitable fibrous material such as paperboard and which may have a thin layer of impervious material, such as metallic foil 24, bonded to a surface corresponding to the interior of container 20. Two pair of parallel fold lines, generally designated 26 and 28, define the bottom wall panel 30 of container 20 and together with the outside edge of blank 22 define two pair of parallel side .wall panels, respectively designated 32 and 34. Each of the parallel side wall panels 32 is provided with a centrally disposed fold line 36, parallel to fold linev 26, which subdivide each of the panels 32 into inner and

outer panels

32a and 32b. Fold lines 36 permit panels 32 to be folded into side walls 3 8

whereinpanels

32a and 32b form the inner and outer sides respectively of the side walls, as clearly seen in FIGS. 2 and 3. Similarly, side wall panels 34 are provided with centrally disposed fold lines 40, parallel to fold lines 28, which subdivide panels 34 into inner and outer panels 34a and 34b. Fold lines 40 permit side wall panels 34 to be folded into side walls 42 of container 20 wherein panels 34a 34b form the inner and outer sides respectively of the side walls, as clearly seen in FIGS. 2 and 3. Thus, it is clearly seen that the

side walls

38 and 42 of container 20 are provided with a double thickness of material and the layer of metallic foil 24 covers both the inside and outside surfaces of the side walls.

The corners, generally designated 44, of blank 22 are provided with cut-outs and fold lines in a unique manner and comprise an important part of the present invention. EAch corner 44 of blank 22 includes a pair of tabs, generally designated 46 and 48, which extend from panels 34a and 34b of side wall panel 34 respectively.

Tabs

46 and 48 are connected to panels 34a and 34b along

fold lines

50 and 52 respectively. As clearly seen in FIG. 1, fold

lines

50 and 52 may be angularly positioned with respect to each other and with respect to fold line 28 to thereby allow side wall 38 to be erected having atapered configuration as clearly seen in FIG. 3. In order to allow for a similar tapered configuration for side wall 42,- edge 54 of panel 32a may be angularly positioned with respect to intersectng fold line 26. The edge of panel 32b adjacent corner 44 is cutout as at 56 to match and be mateable with tab 46 which extends from panel 34a. As clearly seen in FIG. 1, tab 48 is larger than tab 46 so that when side wall panel 34 is folded at fold line 40, as in FIG. 2, tab 48 overlaps and extends beyond tab 46. Further, as clearly seen in FIG. 2, when side wall panel 32 is folded at fold line 36, cut-out 56 in panel 32b exposes a portion of the under-side of panel 320, generally designated 58, which matches the configuration of tab 46.

When forming blank 22 into container 20,

side wall panels

32 and 34 are respectively folded along

fold lines

36 and 40 and the under-sides of the panels bonded together by a suitable adhesive to form the une rect

ed side walls

38 and 42 of container 20, as clearly seen in FIG. 2. In the next step, side wall 38 is raised by bending at fold line 26 so that exposed portion 58, defined by cut-out 56 in panel 32b, faces outwardly, as clearly seen in FIG. 4. At this point it is to be notedthat where blank 22 has bonded thereto metallic foil 24, the exposed portion 58 of the under-side of panel 32a as well as surface 60 of tab 48, as seen in FIG. 4, are not covered by foil 24, while surface 62 of tab 46 is covered with metallic foil 24. An adhesive, suitable for bonding metallic foil to paperboard, may be applied to surfaces 62 and 60'of tabs 46' and 48, respectively, in preparation for the final step of forming the corner connections of container 20. Alternatively, the adhesive may be applied to exposed portion 58 and a portion of panel 32b coextensive with tab 48. In this final step of erecting container 20, side wall 42 is raised by bending at fold line 28 and

tabs

46 and 48, having adhesive on

surfaces

62 and 60, are folded over side wall 38 by bending at

fold lines

50 and 52 respectively.

Tabs

46 and 48 are bonded to side wall 38, as clearly seen in FIGS. 5 and 6, to form the corner connection of container 20. As clearly seen in FIG. 5, tab 46 fits into cut-out 56 of panel 32b, which forms the outer surface of side wall 38, and the surface 62 of tab 46, having a layer of metallic foil 24 thereon, is bonded to exposed portion 58 of the under-side of panel 32a. As clearly seen in FIGS. 5 and 6, tab 48 overlaps and extends beyond tab 46 and is bonded to the outer surface of side wall 38.

Thus, as clearly seen in FIGS. 3 to 6, the corner connections of container 20 are provided with a double thickness of material in the form of

tabs

46 and 48 and also, as clearly seen in FIGS. 5 and 6, only three thicknesses of material are provided at the overlap of the corner connections.

Referring now to FIGS. 7 through 12 of the drawings, wherein a slightly modified form of the embodiment of the present invention shown and described in FIGS. 1 through 6 is depicted, there is shown a container, generally designated in FIG. 9, formed from a generally rectangular blank, designated 122 and shown in FIG. 7. Blank 122 may be made from a suitable fibrous material such as paperboard which may have a thin layer of impervious material such as metallic foil 124, bonded to a surface corresponding to the interior of container 120. Two pair of parallel fold lines, generally designated 126 and 128, define the bottom wall panel .130 of container 120 and together with the outside edge of blank 122 define two pair of parallel side wall panels, respectively designated 132 and 134. Each of parallel side wall panels 132 is provided with a centrally disposed fold line 136, parallel to fold line 126, which subdivides each of the panels 132 into inner and outer panel 132 and 132b. Fold lines 136 permit panel 132 to be folded into side walls 138 wherein panels 132a and 132b form the inner and outer sides respectively of the side walls, as clearly seen in FIGS. 8 and 9. Similarly, side wall panels 134 are provided with centrally disposed fold lines 140, parallel to fold lines 128, which subdivide panels 134 into inner and outer panels 134a and l34b. Fold lines 140 permit side wall panels 134 to be folded into side walls 142 of container 120 wherein panels 134a and 13% form the inner and outer sides respectively of the side walls, as clearly seen in FIGS. 8 and 9. Thus, it is clearly seen that the

side walls

138 and 142 of container 120 are provided with a double thickness of material and the layer of metallic foil 124 covers both the inside and outside surfaces of the side walls.

The corners, generally designated 144, of blank 122 include a pair of tabs, generally designated 146 and 148, which extendfrom panels 134a and 134b of side wall panel 134 respectively.

Tabs

146 and 148 are connected to panels 134a and 134b along

fold lines

150 and 152 respectively. As clearly seen in FIG. 7, fold

lines

150 and 152 may be angularly positioned with respect to each other and with respect to fold line 128 to thereby allow side wall 138 to be erected having a tapered configuration. In order to allow for a similar tapered configuration for side wall 142, edge 154 of panel 134b is cut so that when panel 13212 is folded in back of panel 132a, as in FIG. 8, edge 154 of panel 132b is angularly positioned with respect to fold line 126. The edge of panel 132a, adjacent corner 144, is cut-out as at 156 to match and be mateable with tab 148 which extends from panel 1341). As clearly seen in FIG. 7, tab 146 is larger than tab 148 so that when side wall panel 134 is folded at fold line 140, as in FIG. 2, tab 146 overlaps and extends beyond 148. Further, as clearly seen in FIG. 8, when side wall panel 132 is folded at fold line 136, cutout 156 in panel 132a exposes a portion of the under-side of panel 132b, generally designated 158 which matches the configuration of tab 148.

When forming blank 122 into container 120,

side wall panels

132 and 134 are respectively folded along

fold lines

136 and 140 and the under-sides of the panels bonded togetherby a suitable adhesive to form the

unerected side walls

138 and 142 of container 120, as clearly seen in FIG. 8. In the next step, side wall 138 is raised by bending at fold line 126 so that exposed portion 158, defined by cutout 156 in panel 132a faces inwardly, as clearly seen in FIG. 10. At this point it is to be noted that where blank 122 has bonded thereto metallic foil 124, the exposed portion 158 of the underside of panel l32b as well as surface 160 of tab 146, as seen in FIG. 4, are not covered by foil 124, while surface 162 of tab 148 is covered with metallic foil 124. In the final step of erecting container 120, side wall 142 is raised by bending at fold line 128 and

tabs

146 and 148 are folded on the inside of side wall 138- by bending at

fold lines

150 and 152 respectively,

Tabs

146 and 148 are bonded to side wall 138, as clearly seen in FIGS. 11 and 12, to form the corner connection of container 120. As clearly seen in FIG. 11, tab 148 fits into cut-out 156 of panel 132a which forms the inner surface of side wall 138 and the surface 162 of tab 148,

having a layer of metallic foil 124 thereon, is bonded to exposed portion 158 of the under-side of panel 132b by means of an adhesive suitable for bonding metallic foil to paperboard. As clearly seen in FIGS. 11 and 12, tab 146 overlaps and extends beyond tab 148 and is bonded by an adhesive suitable for bonding metallic 6 foil to paperboard to panel 132a which forms the inner surface of side wall 138.

Thus, as in the case of the embodiment of FIGS. 1 through 6, the comer connections of container are provided with a double thickness of material in the form of

tabs

146 and 148 and also, as clearly seen in FIGS. 11 and 12, only three thicknesses of material are provided at the overlap of the corner connections.

Yet another embodiment of the present invention is depicted in FIGS. 13 through 18 wherein a slightly modified form of the paperboard tray of FIGS. 1 through 6 is shown. The major difference between the two embodiments is that in the paperboard container of FIGS. 13 through 18 provision is made for maintaining the corners of the container leakproof. Thus, a container, generally designated 220 in FIG. 15, of the open-tray type is formed from a generally rectangular blank, designated 222 and shown in FIG. 13, which may be made from a suitable fibrous material such as paperboard and which may have a thin layer of impervious material, such as metallic foil 224, bonded to a surface corresponding to the interior of container 220. Two pair of parallel fold lines, generally designated 226 and 228, define the bottom wall panel 230 of container 2211 and together with the outside edge of blank 222 define two pair of parallel side wall panels, respectively designated 232 and 234. Each of the parallel side wall panels 232 is provided with a centrally disposed fold line 236, parallel to fold line 226, which subdivides each of the panels 232 into inner and

outer panels

232a and 232b. Fold lines 236 permit panels 232 to be folded into side alls 238 wherein

panels

232a and 232b form the inner and outer sides respectively of the side walls, as clearly seen in FIGS. 14 and 15. Similarly, side wall panels 234 are provided with centrally disposed fold lines 240, parallel to fold lines 228, which subdivide panels 234 into inner and

outer panels

234a and 234b. Fold lines 240 permit side wall panels 234 to be folded into side walls 242 of container 220, wherein

panels

234a and 234!) form the inner and outer sides respectively of the side walls, as clearly seen in FIGS. 14 and 15. Thus, it is clearly seen that the

side walls

238 and 242 of container 220 are provided with a double thickness of material and the layer of metallic foil 224 covers both the inside and outside surfaces of the side walls.

Each corner, generally designated 244, of blank 222 includes a web-corner portion 246 which interconnects panels 232a and 2340 at

fold lines

248 and 250 respectively. A tab, generally designated 252, extends from panel 234b and is connected thereto along fold line 254. Web-corner 246 includes a fold line, generally designated 256, which extends from the corner of bottom wall panel 230 and bisects the angle formed between

fold lines

248 and 250 to form generally triangularly shaped sections 246a and 24Gb. As clearly seen in FIG. 13,

fold lines

250 and 254 may be angularly position with respect to each other and with respect to fold line 228 tothereby allow side wall 238 to be erected having a tapered configuration, as clearly seen in FIG. 15. In order to allow for a similar tapered configuration for side wall 242, fold line 248, which interconnects panel 232a and web-corner 246, may be angularly positioned with respect to intersecting fold line 226. The edge of panel 232b adjacent corner 244 is cutout as at 258 to match and be mateable with the triangularly shaped section 246a of web-corner 246. As can be seen from a comparison of FIGS. 1 and 13, the major difference between the

blanks

22 and 222 is the addition of section 246a interconnecting tab 46 and panel 32a blank 22 in FIG. 1. Thus, when web-corner 246 is folded along fold line 256 a tab-like configuration similar to tab 46 of FIG. 1 is formed. As clearly seen in FIG. 13, tab 252 is larger than either of triangularly shaped sections 246a and 246b so that when the corner of container 220 is formed, as clearly seen in FIG. 15, tab 252 overlaps and extends beyond folded web-corner 246. Further, as clearly seen in FIG. 14, when side wall panel 232 is folded at fold line 236, cut-out 258 in panel 232b exposes a portion of the under-side of panel 232a, generally designated 260, which matches the configuration of triangularly shaped section 246a.

When forming blank 222 to container 220,

side wall panels

232 and 234 are respectively folded along

fold lines

236 and 240 and the under-sides of the panels bonded together by a suitable adhesive to form the

unerected side walls

238 and 242 of container 220, as clearly seen in FIG. 14. In the next step,

side walls

238 and 242 are raised by bending at

fold lines

226 and 228 respectively and simultaneously therewith web-corner 246 is folded outwardly by bending at

fold lines

248, 250 and 256. At this point it is to be noted that where blank 222 has bonded thereto metallic foil 224 the a as well as surface 262 of triangular section 246a and the surface 264 of tab 252, as seen in FIG. 16, are not covered by foil 224. Thus, for forming the corners of container 220 a suitable adhesive may be applied to surface 262 of triangular section 246a and a surface 264 of tab 252 and tab 252 folded at fold line 254 over webcorner 246 and bonded to the outside surface of the side wall 238. Alternatively, adhesive may be applied to exposed portion 260 and a portion of panel 23219 coextensive with tab 252 to thereby provide the bonding means for bonding tab 252 and web-corner 246 to side wall 238. As clearly seen in FIGS. 17 and 18, folded web-corner 246 fits into cut-out 258 of panel 232b which forms the outer surface of side wall 238, and the surface 262 of web corner 246 is bonded to the exposed portion 260 of the under-side of panel 232a.

a of material are required at the corner, as seen in FIG.

17, for the purpose of providing a leakproof corner.

It is to be understood that the foregoing general and detailed descriptions are explanatory of the present invention and are not to be interpreted as restrictive of the scope of the following claims.

What is claimed is:

l. A container formed from a paperboard blank wherein fold lines define a rectangularlyshaped bottom wall panel and side wall panels, each of said side wall panels being provided with a centrally disposed fold line parallel to the fold line defining the side wall panel and dividing said side wall panel into inner and outer panels which form double thickness side walls when erected, and having corner connections for connecting adjacent side walls of said container, said corner connections comprising a first tab extending from and integrally connected along a fold line to the inner panel of a side wall forming one of the connected adjacent side walls and folded at said fold line to overlie the other connected adjacent side wall, and a second tab extending from and integrally connected along a fold line to the outer panel adjacent the inner panel from which extends said first tab and folded at said fold line to overlie the other connected adjacent side wall in superimposed relation to said first tab, a side wall panel of the side wall on which the tabs are superimposed being cut out coextensively with the tab next adjacent said side wall to match and be mateable with said next adjacent tab, said next adjacent tab being fitted into said cut-out, and said first and second tabs being bonded to said connected adjacent side wall which they overlie.

2. The container as defined in claim 1 wherein the tab in superimposed relation to said tab fitted into said cut-out is larger to extend beyond said tab fitted into said cut-out and is bonded to the connected adjacent side wall.

3. The container as defined in claim 1 wherein the double thickness side walls formed by the side wall panels are tapered. v

4. The container as defined in claim 1 wherein the paperboard blank is provided with a thin layer of impervious material bonded to the surface thereof whic forms the interior of the container.

5. The container as defined in claim 4 wherein the impervious material bonded to the surface of said paperboard blank is metallic foil. I

6. The container as defined in claim 2 wherein said cut-out is formed in the inner panel of said side wall panel forming the side wall to which the tabs are bonded.

7. The container as defined in claim 2 wherein said cut-out is formed in the outer panel of said side wall panel forming the side wall to which the tabs are bonded.

8. The container as defined in claim 7 which further comprises a third tab extending from and integrally connected along a fold line with the inner panel of the side wall panel forming the side wall to which said first and second tabs are bonded, said third tab being integrally connected to said first tab along a fold line extending from the corner of said rectangularly shaped bottom wall panel to thereby form a web-corner between the inner panels of said connected adjacent side walls.

9. A container having tapered side walls formed from a foil laminated paperboard blank wherein fold lines define a rectangularly shaped bottom wall panel and side wall panels, each of said side wall panels being provided with a centrally disposed fold line parallel to the fold line defining the side wall panel and dividing said side wall panel into inner and outer panels which form double thickness side walls when erected, and having corner connections for connecting adjacent side walls of said container, said corner connections comprising a first tab extending from and integrally connected along a fold line to the inner panel of a side wall panel forming one of the connected adjacent side walls and folded at said fold line to overlie the other connected adjacent side wall, a second tab larger than said first tab and extending from and integrally connected along a fold line to the outer panel adjacent the inner panel from which extends said first tab and folded at said fold line to overlie the other connected adjacent side wall in superimposed relation to said first tab, and a cut-out in the outer panel of the side wall panel forming the side wall from which extend said first and second tabs, said cut-out being coextensive with said first tab to match and be mateable therewith so that said first tab fits therein, said first and second tabs being bonded to the connected adjacent side wall which they overlie.

10. A container having tapered side walls formed from a foil laminated paperboard blank wherein fold lines define a rectangularly shaped bottom wall panel and side wall panels, each of said side wall panels being provided with a centrally disposed fold line parallel to the fold line defining the side wall panel and dividing said side wall panel into inner and outer panels which form double thickness side walls when erected, and having corner connections for connecting adjacent side walls of said container, said corner connections comprising a first tab extending from and integrally connected along a fold line to the inner panel of a side wall panel forming one of the connected adjacent side walls and folded at said fold line to overlie the other connected adjacent side wall, a second tab smaller than said first tab and extending from and integrally connected along a fold line to the outer panel adjacent the inner panel from which extends said first tab and folded at said fold line to overlie the other connected adjacent side wall in superimposed relation to said first tab, and a cut-out in the inner panel of the side wall panel forming the side wall from which extend said first and second tabs, said cut-out being coextensive with said second tab to match and be mateable therewith so that said second tab fits therein, and first and second tabs being bonded to the connected adjacent side wall which they overlie.

11. A paperboard blank adapted to be formed into a container and having fold lines defining a rectangularly shaped bottom wall panel to be formed into the bottom of said container, rectangularly shaped side wall panels integrally connected to said bottom wall panel at said fold lines a fold line centrally disposed in each side wall panel parallel to the fold line connecting said side wall panel to said bottom wall panel and dividing said side wall panel into inner and outer panels to thereby permit said side wall panel to be formed into a side wall having double thickness, a first tab extending from and integrally connected along a fold line to the inner panel of one of two adjacent side wall panels, and a second tab extending from and integrally connected along a fold line to the outer pane] of said one of two adjacent side wall panels, said first and second tabs being adapted to be superimposed one upon the other when said inner and outer side wall panels are folded to form the side wall of said container, aid tabs being further adapted to overlie an adjacent side wall when folded along the fold lines connecting said tabs to said inner and outer panels, and a cut-out in a side wall panel adjacent the side wall panels from which said first and second tabs extend, said cut-out being formed to be coextensive with and to match and be mateable with the tab next adjacent the erected side wall and extending from the other adjacent side wall.

12. The paperboard blank as defined in claim 11 wherein the tab superimposed upon the tab next adjacent the side wall having said cut-out is larger than said tab next adjacent the side wall having said cut-out to extend therebeyond and overlie a larger portion of the adjacent side wall.

13. The paperboard blank as defined in claim 11 wherein the fold lines interconnecting the first and second tabs with said side wall panel are angularly positioned with respect toeach other and with respect to the fold line interconnecting said side wall panel with said bottom wall panel, and the edges of the inner and outer panels of an adjacent side wall panel are angularly positioned with respect to each other and with respect to the fold line interconnecting said side wall panel with said bottom wall panel thereby imparting a tapered configuration to the-side walls of the erected container.

l4. The paperboard blank as defined in claim 11 which further comprises a thin layer of impervious material bonded to the surface of said paperboard blank corresponding to the interior surface of the container formed from said paperboard blank.

15. The paperboard blank as defined in claim 14 wherein said impervious material bonded to a surface of said paperboard blank is metallic foil.

16. The paperboard blank as defined in claim 12 wherein said cut-out is formed in the outer panel of said side wall panel adjacent the side wall panel from which extend said first and second tabs.

17. The paperboard blank as defined in claim 16 which further comprises a third tab extending from and integrally connected along a fold line to the inner panel of the side wall panel in which said cu t-out is formed, said third tab being connected along a fold line to the first tab extending from the inner panel of the adjacent side wall panel to thereby form a web between the inner panels of said adjacent side wall panels.

18. The paperboard blank as defined in claim 12 wherein said cut-out is formed in the inner panel of said side wall panel adjacent the side wall from which extend said first and second tabs.

19. A foil laminated paperboard blank adapted to be formed into a container and having fold lines defining a rectangularly shaped bottom wall to be formed into the bottom of said container, rectangularly shaped side wall panels integrally connected to said bottom wall panel at said fold lines, a fold line centrally disposed in each side wall panel parallel to the fold line connecting said side wall panel to said bottom wall panel and dividing said side wall panel into inner and outer panels to thereby permit said side wall panel to be formed into a side wall having double thickness, a first tab extending from and integrally connected along a fold line to the inner panel of one of two adjacent side wall panels, a second tab larger than said first tab and extending from and integrally connected along a fold line to the outer panel of said one of two adjacent side wall panels, said first and second tabs being adapted to be superimposed one upon the other when said side wall panel is folded to form the side wall of said container and to overlie an adjacent side wall when folded along the fold lines connecting said tabs to said inner and outer panels, said fold lines connecting said tabs to said inner and outer panels are angularly positioned with respect to each other and with respect to the fold line interconnecting said side wall panel with said bottom wall panel and the edges of the inner and outer panels of the adjacent side wall panel are angularly positioned with respect to each other and with respect to the fold line interconnecting said side wall panel with said bottom wall panel thereby imparting a tapered configuration to the sidewalls of the erected container, and a cut-out formed in the outer panel of the side wall panel adjacent the side wall panel from which extend said first and second tabs, said cut-out being coextensive with said first tab to match and be mateable therewith.

20. A foil laminated paperboard blank adapted to be formed into a container and having fold lines defining a rectangularly shaped bottom wall to be formed into the bottom of said container, rectangularly shaped side wall panels integrally connected to said bottom wall panel at said fold lines, a fold line centrally disposed in each side wall panel parallel to the fold line connecting said side wall panel to said bottom wall panel and dividing said side wall panel into inner and outer panels to thereby permit said side wall panel to be formed into a side wall having double thickness, a first tab extending from and integrally connected along a fold line to the inner panelof one of the two adjacent side wall panels, a second tab smaller than said first tab and extending from and integrally connected along a fold line to the outer panel of said one of two adjacent side wall panels, said first and second tabs being adapted to be superimposed one upon the other when said side wall panel is folded to form the side wall of said container and to overlie an adjacent side wall when folded along the fold lines connecting said tabs to said inner and outer panels, said fold lines connecting said tabs to said inner and outer panels are angularly positioned with respect to each other and with respect to the fold line interconnecting said side wall panel with said bottom wall panel and the edges of the inner and outer panels of the adjacent side wall panel are angularly positioned with respect to each other and with respect to the fold line interconnecting said side wall panel with said bottom wall panel thereby imparting a tapered configuration to the side walls of the erected container, and a cut-out formed in the inner panel of the side wall panel adjacent the side wall panel from which extend said first and second tabs, said cut-out being coextensive with said second tab to match and be mateable therewith.

Claims

1. A container formed from a paperboard blank wherein fold lines define a rectangularly shaped bottom wall panel and side wall panels, each of said side wall panels being provided with a centrally disposed fold line parallel to the fold line defining the side wall panel and dividing said side wall panel into inner and outer panels which form double thickness side walls when erected, and having corner connections for connecting adjacent side walls of said container, said corner connections comprising a first tab extending from and integrally connected along a fold line to the inner panel of a side wall forming one of the connected adjacent side walls and folded at said fold line to overlie the other connected adjacent side wall, and a second tab extending from and integrally connected along a fold line to the outer panel adjacent the inner panel from which extends said first tab and folded at said fold line to overlie the other connected adjacent side wall in superimposed relation to said first tab, a side wall panel of the side wall on which the tabs are superimposed being cut out coextensively with the tab next adjacent said side wall to match and be mateable with said next adjacent tab, said next adjacent tab being fitted into said cutout, and said first and second tabs being bonded to said connected adjacent side wall which they overlie.

3. The container as defined in claim 1 wherein the double thickness side walls formed by the side wall panels are tapered.

4. The container as defined in claim 1 wherein the paperboard blank is provided with a thin layer of impervious material bonded to the surface thereof which forms the interior of the container.

5. The container as defined in claim 4 wherein the impervious material bonded to the surface of said paperboard blank is metallic foil.

11. A paperboard blank adapted to be formed into a container and having fold lines defining a rectangularly shaped bottom wall panel to be formed into the bottom of said container, rectangularly shaped side wall panels integrally connected to said bottom wall panel at said fold lines, a fold line centrally disposed in each side wall panel parallel to the fold line connecting said side wall panel to said bottom wall panel and dividing said side wall panel into inner and outer panels to thereby permit said side wall panel to be formed into a side wall having double thickness, a first tab extending from and integrally connected along a fold line to the inner panel of one of two adjacent side wall panels, and a second tab extending from and integrally connected along a fold line to the outer panel of said one of two adjacent side wall panels, said first and second tabs being adapted to be superimposed one upon the other when said inner and outer side wall panels are folded to form the side wall of said Container, aid tabs being further adapted to overlie an adjacent side wall when folded along the fold lines connecting said tabs to said inner and outer panels, and a cut-out in a side wall panel adjacent the side wall panels from which said first and second tabs extend, said cut-out being formed to be coextensive with and to match and be mateable with the tab next adjacent the erected side wall and extending from the other adjacent side wall.

13. The paperboard blank as defined in claim 11 wherein the fold lines interconnecting the first and second tabs with said side wall panel are angularly positioned with respect to each other and with respect to the fold line interconnecting said side wall panel with said bottom wall panel, and the edges of the inner and outer panels of an adjacent side wall panel are angularly positioned with respect to each other and with respect to the fold line interconnecting said side wall panel with said bottom wall panel thereby imparting a tapered configuration to the side walls of the erected container.

14. The paperboard blank as defined in claim 11 which further comprises a thin layer of impervious material bonded to the surface of said paperboard blank corresponding to the interior surface of the container formed from said paperboard blank.

17. The paperboard blank as defined in claim 16 which further comprises a third tab extending from and integrally connected along a fold line to the inner panel of the side wall panel in which said cut-out is formed, said third tab being connected along a fold line to the first tab extending from the inner panel of the adjacent side wall panel to thereby form a web between the inner panels of said adjacent side wall panels.

20. A foil laminated paperboard blank adapted to be formed into a container and having fold lines defining a rectangularly shaped bottom wall to be formed into the bottom of said container, rectangularly shaped side wall panels integrally connected to said bottom wall panel at said fold lines, a fold line centrally disposed in each side wall panel parallel to the fold line connecting said side wall panel to said bottom wall panel and dividing said side wall panel into inner and outer panels to thereby permit said side wall panel to be formed into a side wall having double thickness, a first tab extending from and integrally connected along a fold line to the inner panel of one of the two adjacent side wall panels, a second tab smaller than said first tab and extending from and integrally connected along a fold line to the outer panel of said one of two adjacent side wall panels, said first and second tabs being adapted to be superimposed one upon the other when said side wall panel is folded to form the side wall of said container and to overlie an adjacent side wall when folded along the fold lines connecting said tabs to said inner and outer panels, said fold lines connecting said tabs to said inner and outer panels are angularly positioned with respect to each other and with respect to the fold line interconnecting said side wall panel with said bottom wall panel and the edges of the inner and outer panels of the adjacent side wall panel are angularly positioned with respect to each other and with respect to the fold line interconnecting said side wall panel with said bottom wall panel thereby imparting a tapered configuration to the side walls of the erected container, and a cut-out formed in the inner panel of the side wall panel adjacent the side wall panel from which extend said first and second tabs, said cut-out being coextensive with said second tab to match and be mateable therewith.