CA1256413A - Paperboard container with infolded bottom closure - Google Patents
Paperboard container with infolded bottom closureInfo
- Publication number
- CA1256413A CA1256413A CA000462870A CA462870A CA1256413A CA 1256413 A CA1256413 A CA 1256413A CA 000462870 A CA000462870 A CA 000462870A CA 462870 A CA462870 A CA 462870A CA 1256413 A CA1256413 A CA 1256413A
- Authority
- CA
- Canada
- Prior art keywords
- panels
- panel
- rectangular
- fold
- edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/02—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
- B65D5/04—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body the tubular body having no end closures
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cartons (AREA)
Abstract
PAPERBOARD CONTAINER WITH
INFOLDED BOTTOM CLOSURE
Abstract A paperboard container with an infolded bottom closure of the type wherein the overlapped outside panel thereof does not include a tuck-in or-under portion. It does, however, include a tab portion formed on the edge thereof which is automatically folded back about a score line in the forming process, thereby eliminating inside raw edges at the center of the bottom of the container without there being any adjacent or remaining extended edge portions.
INFOLDED BOTTOM CLOSURE
Abstract A paperboard container with an infolded bottom closure of the type wherein the overlapped outside panel thereof does not include a tuck-in or-under portion. It does, however, include a tab portion formed on the edge thereof which is automatically folded back about a score line in the forming process, thereby eliminating inside raw edges at the center of the bottom of the container without there being any adjacent or remaining extended edge portions.
Description
I
; PAPERBOARD CONTAINE~ WITH
~` M _LDED BOTTOM CLOSURE
Technical Field This invention relates generally to thermoplastic coated, liquid carrying paperboard containers and, more particularly, to an improved thermoplastic coated paperboard container bottom closure for eliminating edge wicking throuqh the panel edges Gf the interior container.
Background Art Coated paperboard containers have been widely used for packaging milk and other liquid products which do not require a long shelf life~ These containers have raw edges because the blanks therefor are cut from large sheets or rolls. These raw edges are subject to wicking or pene-tration of the wall panels by the product in a container.
This wicking action eventually weakens the container and does not permit the container to be used for packaging liquids which may be stored for long periods of time as, for example, juices, syrups and the like.
One satisfactory arrangement for eliminating such internal bottom raw edges is that shown and described in Miller et al U.S. patent no. 3,412,922. However, on particular models of forming, filling and sealing machines, it is desirable to not have to first break along a score line and then fold back a tab portion of an underlying bottom panel as a separate operation prior to the folding of the two outer bottom panels, as is the case in the Miller e~
al arrangement. Another known arrangement is shown and described in Miller et al U.S. patent no. 3,294,310, wherein distal half of the "tuck-in" edge portion of the underlying bottom panel is folded around a score line across the entire width thereof, prior to completing the folding, tucking and sealing thereof.
a~
~5;6~
Di~clo3ure o~ the Inven~lon-Accordingly, a general object of the invention is to provide an improved coated paperboard container in which the raw edges inside of the container have been eliminated so as to provide a container having a long shelf life.
Another object of the invention is to provide a coated paperboard container in which a central tab has been formed on an otherwise non-tuck type underlying bottom panel, and which is automatically folded under in the forming process to form a sealed edge in the center of the bottom closure which is impervious to moisture, and wherein edge wicking action is eliminated.
Still another object of the invention is to provide a means for eliminating edge wicking in a coated paperboard container by folding under a central tab portion formed on a closure panel without any adjacent free cut edges which would present a jamming problem on carton forming machines.
The present invention meets the above~defined objects by providing a method of forming a liquid-carrying container from a one-piece, flat, thermoplastic coated, paperboard blank including four body panels and a side seam flap, and four bottom closure panels, wherein two alternate bottom panels are triangular gusset panels, and the remaining panels are rectangular in shape, with one of khe rectangular panels having a centrally located fold-back tab formed on the edge thcreof, and the other rectangular panel including an edge extension for overlapping the other rectangular panel on the outside thereof, the method comprising the following steps: providing the fold-back tab with a score line aligned with the edge of the one ,:
!D
rectangular panel; folcling -the blank in ha].f and securing the side seam flap to the adjacent body panel edye portion; forminy the folded blank into a four-sided tubular blank such that the respective triangular and rectangular panels are oppositely disposed; placing the tubular blank on a rotatable mandrel;
breaking the two oppositely disposed triangular panels inwardly; folding the two oppositely disposed rectangu]ar panels toward each other over the triangular panels; bending the fold-back tab backwardly along the score line toward and into contact with its interconnected rectangular panel as the fold-back tab abuts against the free edge of the extension of the other rectangular panel as the latter extension progressively overlaps the one rectangular panel and fold-back tab; and sealing the bottom closure substantially across the total length of the overlapped portions of the rectangular panels.
These and other objects and advantages of the invention will be apparent when reference is made to the following description and accompanying drawings.
2U Brief De~cription of the Drawin~s Figure 1 is a lay-out plan view of the inside surface of a thermoplastic coated paperboard blank from which a container bottom closure of the present invention is formed;
Figure 2 is a plan view o~ a side seamed blank made from the blank shown in Figure l;
Figures 3, 4 and ~ are fragmentary perspective views illustrating sequentially three of the steps involved in forming the bottom closure of the present invention;
~ 3 Figure 6 is a view of the inside face of the completed bottom closure; and Figure 7 is an enlarged sectional view taker. along the 05 plane of the line 7-7 of Figure 6, and looking in the direction of the arrows.
Best Mode of Carrying Out the Invention Referring now to the drawings in greater detail, Figure 1 illustrates the inside surface of a container blank 10. The container blank 10 is separated into three general groups by staggered score lines 12 and 14. The group above staggered score line 12 is referred to as top closure group 16. The group between staggered score lines 12 and 14 are referred to as body group 18. The group below staggered score line 14 is referred to as bottom closure group 20.
The container blank 10 is defined on its sides by side edges 22 and 24 and is separated vertically by a series of score lines 26, 28, 30 and 32. The score lines 26, 28, 30 and 32 divide the group body 18 into side wall panels 34, 36, 38 and 40 and side seam flap 42.
Triangular end panels 44 and 46 are connected at the score line 12 to the upper ends of the side wall panels 34 and 38, respectively. A first pair of fold-back panels 48 and 50 are connected to diagonal score lines 49 and 51 which define the triangular end panel 44, and a second pair of fold-back panels 52 and 54 are connected to diagonal score lines 53 and 55 which define the triangular end panel 46. A
pair of inner rib panels 56 and 58 are connected to the outer edges of the fold-back panels 48 and 50, respectively, by score lines 57 and 59. A pair of inner rib panels 60 and 62 are likewise connected to the outer edges of the fold-back panels 52 and 54, respectively, by score lines 61 and 63.
A pair of outer roof panels 64 and 66 are connected at the score line 12 to the upper ends of the wall panels 36 and 40, respectively. A pair of outer sealing rlb panels 68 and 70 are connected at score lines 69 and 71 to the upper 05 ends of the roof panels 64 and 66, respectively. A complete description of the top closure group 16 is not necessary in order to understand the principles of the present invention.
However, reference is made to U.S. Patent 3,270,940 which issued September 6, 1966 for a complete description of a top closure group similar to top closure group 16.
Insofar as the bottom closure group 20 is concerned, a pair of outer panels 74 and 76 are connected by the score line 14 to the lower ends of the side wall panels 34 and 38, respectively. A pair of triangular in-fold panels 78 and 80 are likewise connected by the score line 14 to the lower ends of the side wall panels 36 and 40, respectively. A
pair of fold-back panels 82 and 84 are connected by diagonal score lines 83 and 85, respectively to the panel 7~, and a pair of fold-back panels 86 and 88 are connected by diagonal score lines 87 and 89, respectively, to the panel ao. A
rectangular fold-back tab 90 is connected by a horizontal score line 92 to the panel 74.
An extension 94 is formed on the panel 76 for over-lapping a portion of the panel 74 as will be explained. A
chamfered edge 96 is formed on the extension 94 to coincide with a chamfered edge 98 formed on the end of the side seam flap 42. Except for the fold-back tab 90, the extension 94, and the chamfer 98, the free edge of the bottom closure group 20 is a straight line 99.
When the container blank 10 is being prepared for assembly as a container it will be side seamed by having the roof panel 66, the side wall panel 40 ad the infold panel 80 and its associated fold-back panels 86 and 88, along with the side seam flap 42, folded about the score line 30, moving their inside surfaces into contact with the inside ~2S~
surfaces of the triangular end panel 46, the side wall panel 38 and the outer panel 76, with the side seam flap 42 extending past the score line 28.
05 The triangular end panel 44, the side wall panel 34 and the bottom panel 74 will be rotated about the score line 26 so their inside surfaces will move toward the inside surface of the roof panel 64, the side wall panel 36 and the infold panel 78 and the associated fold-back panels 82 and 84. The side edge 22 will then be substantially aligned with the score line 32, and its associated edge portion will be aligned with and in contact with the outside surface of the side seam flap 42. The outside surface of side seam flap 42 is secured to the inside surface of the various panel members positioned along the side edge 22. This can be accomplished in many ways. One of the preferred methods is heat sealing which will establish a surface bond between the adjacent members. The container blank 10 can then be opened into tubular form as illustrated in Figure 3.
In normal production operations the bottom closure group 20 will be closed and sealed, the contents will be passed into the ~ubular container member and then the top closure group 16 will be closed. The forming of the side seam blank and the closing of the top closure group is covered in detail in the above mentioned U.S. Patent 3,270,940.
The diagonal edges 96 and 98 of the bottom panel 76 and the side seam flap 42 are provided so that when the bottom closure is construc~ed there will not be an extra layer of paper since the panel 76 will not e~tend over the side seam flap 42, but, rather, will enter into positlve vertical alignment with the panel 7~ sealed in between, as may be noted in Figure 6.
More specifically, completion of the formation of the bottom closure 20 is illustrated sequentially in Figures 5~
3-6. Starting with the blank in the open-ended tubular form illustrated in Figure 3, khe triangular in-fold panels 78 and 80, and their associated fold-back panels 82, 84, 86 and 88, as well as the outer panels 74 and 76 are first broken 05 inwardly, as shown in Figure 4. They are then subjected to fairly inkense heat, rendering the outer and inner layers of plastic material, such as polyethylene, adhesively active.
By referring to Figure 5, it may be noted that prebreaking of the tab 90 along the score line 92 is not re.quired in the typical forming operation on a forming, filling and sealing machine, inasmuch as the tubular blank (Figure 3) is mounted on a mandrel 100 which is shown in Figure 5 rotating in a counterclockwise rotation. This causes the outer panel 76 to be bent further downwardly about the score line 14 upon contacting a fixed forming shoe 102. A tucking finger 104 is thereupon pivoted about a pivot pin 106 in a clockwise direction, causing the outer panel 74 to bend downwardly about the score line 14, bringing the tab 90, but not the panel 74, into contact with the free edge 108 of the extension 94 of the outer panel 76. Thus, no jam-up between the panels 74 and 76 are possible, and the tab 90 is efficiently bent backwardly about the score line 92 to become flattened against the panel 74 beneath the extension 94 where it becomes sealed. With the tab 90 confined between the underlying integral outer panel 74 and the overlying outer panel 76, there are no raw edges within the bottom closure 20, but rather a sealed edge 92, as seen from inside the container (Figure 6). On the outside of the container ~Figure 7), a continuous seal is now formed between the extension 94 and the panel 74 adjacent the tab 90, running the full width of the extension 94. This, therefor, eliminates any chance for channel leaks to occur along the edges of the covered tab 90.
The raw edge 24 along the length of the side seam flap 42 may also be eliminated by using the folded-over edge arrangement shown and descrlbed in Miller et al Patent No. 3,412,922, and forming no part of the present invention.
Industrla ~ plicability It should be apparent that the invention provides a simplified, efficient means for eliminating raw panel edges on the inside surfaces of the bottom closure.
While but one embodiment of the invention ha.s been shown and described, other modifications thereof are possible.
; PAPERBOARD CONTAINE~ WITH
~` M _LDED BOTTOM CLOSURE
Technical Field This invention relates generally to thermoplastic coated, liquid carrying paperboard containers and, more particularly, to an improved thermoplastic coated paperboard container bottom closure for eliminating edge wicking throuqh the panel edges Gf the interior container.
Background Art Coated paperboard containers have been widely used for packaging milk and other liquid products which do not require a long shelf life~ These containers have raw edges because the blanks therefor are cut from large sheets or rolls. These raw edges are subject to wicking or pene-tration of the wall panels by the product in a container.
This wicking action eventually weakens the container and does not permit the container to be used for packaging liquids which may be stored for long periods of time as, for example, juices, syrups and the like.
One satisfactory arrangement for eliminating such internal bottom raw edges is that shown and described in Miller et al U.S. patent no. 3,412,922. However, on particular models of forming, filling and sealing machines, it is desirable to not have to first break along a score line and then fold back a tab portion of an underlying bottom panel as a separate operation prior to the folding of the two outer bottom panels, as is the case in the Miller e~
al arrangement. Another known arrangement is shown and described in Miller et al U.S. patent no. 3,294,310, wherein distal half of the "tuck-in" edge portion of the underlying bottom panel is folded around a score line across the entire width thereof, prior to completing the folding, tucking and sealing thereof.
a~
~5;6~
Di~clo3ure o~ the Inven~lon-Accordingly, a general object of the invention is to provide an improved coated paperboard container in which the raw edges inside of the container have been eliminated so as to provide a container having a long shelf life.
Another object of the invention is to provide a coated paperboard container in which a central tab has been formed on an otherwise non-tuck type underlying bottom panel, and which is automatically folded under in the forming process to form a sealed edge in the center of the bottom closure which is impervious to moisture, and wherein edge wicking action is eliminated.
Still another object of the invention is to provide a means for eliminating edge wicking in a coated paperboard container by folding under a central tab portion formed on a closure panel without any adjacent free cut edges which would present a jamming problem on carton forming machines.
The present invention meets the above~defined objects by providing a method of forming a liquid-carrying container from a one-piece, flat, thermoplastic coated, paperboard blank including four body panels and a side seam flap, and four bottom closure panels, wherein two alternate bottom panels are triangular gusset panels, and the remaining panels are rectangular in shape, with one of khe rectangular panels having a centrally located fold-back tab formed on the edge thcreof, and the other rectangular panel including an edge extension for overlapping the other rectangular panel on the outside thereof, the method comprising the following steps: providing the fold-back tab with a score line aligned with the edge of the one ,:
!D
rectangular panel; folcling -the blank in ha].f and securing the side seam flap to the adjacent body panel edye portion; forminy the folded blank into a four-sided tubular blank such that the respective triangular and rectangular panels are oppositely disposed; placing the tubular blank on a rotatable mandrel;
breaking the two oppositely disposed triangular panels inwardly; folding the two oppositely disposed rectangu]ar panels toward each other over the triangular panels; bending the fold-back tab backwardly along the score line toward and into contact with its interconnected rectangular panel as the fold-back tab abuts against the free edge of the extension of the other rectangular panel as the latter extension progressively overlaps the one rectangular panel and fold-back tab; and sealing the bottom closure substantially across the total length of the overlapped portions of the rectangular panels.
These and other objects and advantages of the invention will be apparent when reference is made to the following description and accompanying drawings.
2U Brief De~cription of the Drawin~s Figure 1 is a lay-out plan view of the inside surface of a thermoplastic coated paperboard blank from which a container bottom closure of the present invention is formed;
Figure 2 is a plan view o~ a side seamed blank made from the blank shown in Figure l;
Figures 3, 4 and ~ are fragmentary perspective views illustrating sequentially three of the steps involved in forming the bottom closure of the present invention;
~ 3 Figure 6 is a view of the inside face of the completed bottom closure; and Figure 7 is an enlarged sectional view taker. along the 05 plane of the line 7-7 of Figure 6, and looking in the direction of the arrows.
Best Mode of Carrying Out the Invention Referring now to the drawings in greater detail, Figure 1 illustrates the inside surface of a container blank 10. The container blank 10 is separated into three general groups by staggered score lines 12 and 14. The group above staggered score line 12 is referred to as top closure group 16. The group between staggered score lines 12 and 14 are referred to as body group 18. The group below staggered score line 14 is referred to as bottom closure group 20.
The container blank 10 is defined on its sides by side edges 22 and 24 and is separated vertically by a series of score lines 26, 28, 30 and 32. The score lines 26, 28, 30 and 32 divide the group body 18 into side wall panels 34, 36, 38 and 40 and side seam flap 42.
Triangular end panels 44 and 46 are connected at the score line 12 to the upper ends of the side wall panels 34 and 38, respectively. A first pair of fold-back panels 48 and 50 are connected to diagonal score lines 49 and 51 which define the triangular end panel 44, and a second pair of fold-back panels 52 and 54 are connected to diagonal score lines 53 and 55 which define the triangular end panel 46. A
pair of inner rib panels 56 and 58 are connected to the outer edges of the fold-back panels 48 and 50, respectively, by score lines 57 and 59. A pair of inner rib panels 60 and 62 are likewise connected to the outer edges of the fold-back panels 52 and 54, respectively, by score lines 61 and 63.
A pair of outer roof panels 64 and 66 are connected at the score line 12 to the upper ends of the wall panels 36 and 40, respectively. A pair of outer sealing rlb panels 68 and 70 are connected at score lines 69 and 71 to the upper 05 ends of the roof panels 64 and 66, respectively. A complete description of the top closure group 16 is not necessary in order to understand the principles of the present invention.
However, reference is made to U.S. Patent 3,270,940 which issued September 6, 1966 for a complete description of a top closure group similar to top closure group 16.
Insofar as the bottom closure group 20 is concerned, a pair of outer panels 74 and 76 are connected by the score line 14 to the lower ends of the side wall panels 34 and 38, respectively. A pair of triangular in-fold panels 78 and 80 are likewise connected by the score line 14 to the lower ends of the side wall panels 36 and 40, respectively. A
pair of fold-back panels 82 and 84 are connected by diagonal score lines 83 and 85, respectively to the panel 7~, and a pair of fold-back panels 86 and 88 are connected by diagonal score lines 87 and 89, respectively, to the panel ao. A
rectangular fold-back tab 90 is connected by a horizontal score line 92 to the panel 74.
An extension 94 is formed on the panel 76 for over-lapping a portion of the panel 74 as will be explained. A
chamfered edge 96 is formed on the extension 94 to coincide with a chamfered edge 98 formed on the end of the side seam flap 42. Except for the fold-back tab 90, the extension 94, and the chamfer 98, the free edge of the bottom closure group 20 is a straight line 99.
When the container blank 10 is being prepared for assembly as a container it will be side seamed by having the roof panel 66, the side wall panel 40 ad the infold panel 80 and its associated fold-back panels 86 and 88, along with the side seam flap 42, folded about the score line 30, moving their inside surfaces into contact with the inside ~2S~
surfaces of the triangular end panel 46, the side wall panel 38 and the outer panel 76, with the side seam flap 42 extending past the score line 28.
05 The triangular end panel 44, the side wall panel 34 and the bottom panel 74 will be rotated about the score line 26 so their inside surfaces will move toward the inside surface of the roof panel 64, the side wall panel 36 and the infold panel 78 and the associated fold-back panels 82 and 84. The side edge 22 will then be substantially aligned with the score line 32, and its associated edge portion will be aligned with and in contact with the outside surface of the side seam flap 42. The outside surface of side seam flap 42 is secured to the inside surface of the various panel members positioned along the side edge 22. This can be accomplished in many ways. One of the preferred methods is heat sealing which will establish a surface bond between the adjacent members. The container blank 10 can then be opened into tubular form as illustrated in Figure 3.
In normal production operations the bottom closure group 20 will be closed and sealed, the contents will be passed into the ~ubular container member and then the top closure group 16 will be closed. The forming of the side seam blank and the closing of the top closure group is covered in detail in the above mentioned U.S. Patent 3,270,940.
The diagonal edges 96 and 98 of the bottom panel 76 and the side seam flap 42 are provided so that when the bottom closure is construc~ed there will not be an extra layer of paper since the panel 76 will not e~tend over the side seam flap 42, but, rather, will enter into positlve vertical alignment with the panel 7~ sealed in between, as may be noted in Figure 6.
More specifically, completion of the formation of the bottom closure 20 is illustrated sequentially in Figures 5~
3-6. Starting with the blank in the open-ended tubular form illustrated in Figure 3, khe triangular in-fold panels 78 and 80, and their associated fold-back panels 82, 84, 86 and 88, as well as the outer panels 74 and 76 are first broken 05 inwardly, as shown in Figure 4. They are then subjected to fairly inkense heat, rendering the outer and inner layers of plastic material, such as polyethylene, adhesively active.
By referring to Figure 5, it may be noted that prebreaking of the tab 90 along the score line 92 is not re.quired in the typical forming operation on a forming, filling and sealing machine, inasmuch as the tubular blank (Figure 3) is mounted on a mandrel 100 which is shown in Figure 5 rotating in a counterclockwise rotation. This causes the outer panel 76 to be bent further downwardly about the score line 14 upon contacting a fixed forming shoe 102. A tucking finger 104 is thereupon pivoted about a pivot pin 106 in a clockwise direction, causing the outer panel 74 to bend downwardly about the score line 14, bringing the tab 90, but not the panel 74, into contact with the free edge 108 of the extension 94 of the outer panel 76. Thus, no jam-up between the panels 74 and 76 are possible, and the tab 90 is efficiently bent backwardly about the score line 92 to become flattened against the panel 74 beneath the extension 94 where it becomes sealed. With the tab 90 confined between the underlying integral outer panel 74 and the overlying outer panel 76, there are no raw edges within the bottom closure 20, but rather a sealed edge 92, as seen from inside the container (Figure 6). On the outside of the container ~Figure 7), a continuous seal is now formed between the extension 94 and the panel 74 adjacent the tab 90, running the full width of the extension 94. This, therefor, eliminates any chance for channel leaks to occur along the edges of the covered tab 90.
The raw edge 24 along the length of the side seam flap 42 may also be eliminated by using the folded-over edge arrangement shown and descrlbed in Miller et al Patent No. 3,412,922, and forming no part of the present invention.
Industrla ~ plicability It should be apparent that the invention provides a simplified, efficient means for eliminating raw panel edges on the inside surfaces of the bottom closure.
While but one embodiment of the invention ha.s been shown and described, other modifications thereof are possible.
Claims
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A method of forming a liquid-carrying container from a one-piece, flat, thermoplastic coated, paperboard blank including four body panels and a side seam flap, and four bottom closure panels, wherein two alternate bottom panels are triangular gusset panels, and the remaining panels are rectangular in shape, with one of said rectangular panels having a centrally located fold-back tab formed on the edge thereof, and the other rectangular panel including an edge extension for overlapping the other rectangular panel on the outside thereof, said method comprising the following steps:
(a) providing the fold-back tab with a score line aligned with the edge of said one rectangular panel;
(b) folding said blank in half and securing said side seam flap to the adjacent body panel edge portion;
(c) forming said folded blank into a four-sided tubular blank such that said respective triangular and rectangular panels are oppositely disposed;
(d) placing said tubular blank on a rotatable mandrel;
(e) breaking the two oppositely disposed triangular panels inwardly;
(f) folding the two oppositely disposed rectangular panels toward each other over the triangular panels;
Claim 1 cont'd...
(g) bending the fold-back tab backwardly along said score line toward and into contact with its interconnected rectangular panel as the fold-back tab abuts against the free edge of the extension of the other rectangular panel as the latter extension progressively overlaps the one rectangular panel and fold-back tab; and (h) sealing the bottom closure substantially across the total length of the overlapped portions of the rectangular panels.
(g) bending the fold-back tab backwardly along said score line toward and into contact with its interconnected rectangular panel as the fold-back tab abuts against the free edge of the extension of the other rectangular panel as the latter extension progressively overlaps the one rectangular panel and fold-back tab; and (h) sealing the bottom closure substantially across the total length of the overlapped portions of the rectangular panels.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US54994583A | 1983-11-09 | 1983-11-09 | |
| US549,945 | 1983-11-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1256413A true CA1256413A (en) | 1989-06-27 |
Family
ID=24195043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000462870A Expired CA1256413A (en) | 1983-11-09 | 1984-09-11 | Paperboard container with infolded bottom closure |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS60110639A (en) |
| KR (1) | KR850004230A (en) |
| AU (1) | AU583794B2 (en) |
| CA (1) | CA1256413A (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS447822Y1 (en) * | 1964-12-30 | 1969-03-25 | ||
| US3294310A (en) * | 1965-04-26 | 1966-12-27 | Ex Cell O Corp | Paperboard container and method of eliminating edge wicking in the container |
| US3412922A (en) * | 1966-09-06 | 1968-11-26 | Ex Cell O Corp | Paperboard container closure |
| JPS4813058U (en) * | 1971-06-25 | 1973-02-14 | ||
| JPS524635A (en) * | 1975-05-30 | 1977-01-13 | Toto Ltd | Chamber pot cleaning device |
| JPS52113474A (en) * | 1976-03-18 | 1977-09-22 | Toyota Motor Corp | Compound cylinder type oil hydraulic buffer |
-
1984
- 1984-07-20 AU AU30908/84A patent/AU583794B2/en not_active Ceased
- 1984-08-08 JP JP59165034A patent/JPS60110639A/en active Pending
- 1984-08-11 KR KR1019840004827A patent/KR850004230A/en not_active Application Discontinuation
- 1984-09-11 CA CA000462870A patent/CA1256413A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AU583794B2 (en) | 1989-05-11 |
| KR850004230A (en) | 1985-07-11 |
| AU3090884A (en) | 1985-05-16 |
| JPS60110639A (en) | 1985-06-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |