US3268149A - Reenforced flap container - Google Patents

Reenforced flap container Download PDF

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Publication number
US3268149A
US3268149A US375749A US37574964A US3268149A US 3268149 A US3268149 A US 3268149A US 375749 A US375749 A US 375749A US 37574964 A US37574964 A US 37574964A US 3268149 A US3268149 A US 3268149A
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Prior art keywords
flaps
auxiliary
closure
container
folded
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Expired - Lifetime
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US375749A
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John C Brackett
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Waldorf Paper Products Co
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Waldorf Paper Products Co
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    • 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
    • B65D5/0227—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 with end closures formed by inward folding of flaps and securing them by heat-sealing, by applying adhesive to the flaps or by staples

Definitions

  • a feature of the present invention resides in the provision of a container having rectangularly arranged side and end walls, and having closure flaps hingedly connected to at least one end of these walls.
  • auxiliary flaps are cut from the body of the last folded flaps, there auxiliary flaps being hinged to the wall of the container along the lines of fold of the flaps from which they are cut.
  • These auxiliary flaps are preferably centrally located between the side edges of the flaps, and are designed to underlie end portions of the first folded flaps when they are folded, usually into edge abutting relation.
  • the adhesive is then applied either to the upper surfaces of the first folded fiaps or the undersurfaces of the flaps from which the auxiliary flaps have been cut, and the remainder of these latter flaps are then folded down to overlie the end areas of the first folded flaps to be adhered in face contact therethrough.
  • the flaps may be pre-coated with adhesive, or stitched in closed condition.
  • the auxiliary flaps are cut from the flaps hinged to the end walls of the container where the containers are not square. Where the containers are square, the auxiliary flaps may be cut from the center portion of either opposed pair of flaps, in the area thereof adjoining the fold lines connecting these flaps to their respective walls.
  • Rectangular containers are usually closed by folding the flaps connected to the end walls into a common plane, and then folding the side wall closing flaps into a common plane and in edge abutting relation overlying the end wall flaps.
  • the flaps connected to the end walls have a tendency to swing downwardly during the time the pressure is applied.
  • the adhesive will set while the superimposed flaps are out of face contact, forming a poor seal.
  • supports may be formed by folding these auxiliary flaps inwardly prior to folding the side wall flaps in edge abutting relation, and then folding the remainder of the end wall flaps over the side wall flaps for attachment thereto.
  • FIGURE 1 is a perspective view of the upper portion of a container with the various flaps folded outwardly to disclose the construction thereof.
  • FIGURE 2 is a view similar to FIGURE 1, but showing the auxiliary flaps folded inwardly to underlie portions of the side wall closing flaps.
  • FIGURE 3 is a perspective view of the closed and sealed container.
  • the container A includes a pair of side wall panels 10 and 11 and a pair of end wall panels 12 and 13.
  • the end wall 12 is hingedly connected to the side wall panels 10 and 11 along parallel fold lines 14 and 15, and the side wall 11 is connected to the end wall 13 along a parallel fold line 16.
  • the ends of the blank, formed by edges of the side wall 10 and end wall 13 are secured together in any suitable manner such as by the tape 17 to form a collapsible tubular container.
  • Side wall flaps 19 and 20 are hingedly connected to the upper edges of the side walls 10 and 11 along fold lines 21 and 22 respectively, and the end walls 12 and 13 are connected to the end wall closing flaps 23 and 24 respectively along fold lines 25 and 26.
  • the side wall flaps 19 and 20 are preferably proper length to fold into edge abutting relation when in a common plane, while the end wall flaps 23 and 24 are usually of the same length when the container is elongated and terminate in spaced relation when folded into a common plane.
  • the construction described to this point is conventional.
  • auxilary flaps 27 and 29 are formed within the end walls 23 and 24, and are shown in the drawings as being defined by generally U-shaped cut lines 30 and 31 which terminate at the fold lines 25 and 26 which connect the end wall closing flaps to the end walls 12 and 13.
  • the auxilary flaps 27 and 29 are preferably located intermediate the side edges of the end Wall closing flaps, and may be individually folded along the fold lines 25 and 26 which connect the end wall closing flaps to the end walls.
  • These auxiliary fiaps 27 and 29 form the novel feature of the present invention.
  • the auxiliary flaps 27 and 29 are positioned to underlie portions of both of the side wall closing flaps 19 and 20 along their abutting edges.
  • the auxiliary closing flaps 27 and 29 are first folded inwardly into a common plane as indicated in dotted outline in FIGURE 2 of the drawings, and the side wall closing flaps 19 and 20 are then folded into a common plane to overlie the flaps 27 and 29 as indicated in the same figure. Adhesive is then applied to the surface of the end wall closing flaps 23 and 24 in the area thereof externally of the flaps 27 and 29, and these flaps 23 and 24 are then folded into face contact with the upper surfaces of the side wall closing flaps 19 and 20, and then sealing pressure is applied thereto.
  • the container closure appears as indicated in FIGURE 3 of the drawings.
  • auxiliary closing flaps 27 and 29, being beneath the ends of the side wall closing flaps 19 and 20 assist in preventing the side wall closing fiaps from folding down wardly when pressure is applied to the flaps 23 and 24. As a result, a greater sealing pressure may be applied than is otherwise practical in a container containing material which is not self-supporting.
  • the use of preapplied adhesive on the closing flaps of containers has increased materially in volume.
  • the adhesive coated surface will adhere only The present container 23 and 24 and to the outer surfaces of end portions of the side wall closing flaps 19 and 20 in the area thereof which will underlie the end wall closing flaps.
  • the containers may be shipped flat as the adhesive coated areas of one blank will not contact the coated surfaces of the adjoining blanks.
  • the adhesive coated surfaces of the side wall flaps are pressed against the similarly coated surfaces of the end wall flaps, and the containers will be tightly sealed.
  • a container flap support for use in a container including:
  • side and end wall closure flaps hingedly connected to said side and end walls and foldable into superimposed relation to form a closure, two opposed of said closure flaps having auxiliary flaps defined by cut lines terminating at the fold lines connecting said two opposed closure flaps to their -walls,
  • auxiliary flaps being independently foldable from the plane of said two opposed flaps from which they are cut
  • said first mentioned two opposed closure flaps being secured in overlying relation to portions of said remaining two opposed closure flaps.
  • end wall closure flaps being divided into an outer flap portion and an auxiliary flap by -a generally U-shaped cut line in said end wall closure flaps terminating at the fold lines connecting the same to said end walls, said outer flap portion and auxiliary flap of each end closure flap being independently foldable,
  • auxiliary flap being positioned, when folded inwardly, to underlie portions of both of said side wall closure flaps when said side wall closure flaps are folded inwardly, and
  • said outer flap portions being foldable outwardly of said side wall closure flaps and into face contact therewith.
  • a container flap support for use in a container including:
  • end wall closure flaps being divided into an outer flap portion and an auxiliary flap by a generally U-shaped cut line in said end wall closure flaps terminating at the fold lines connecting the same to said end walls, said outer flap portion and auxiliary flap of each end closure flap being independently foldable,
  • auxiliary flap being positioned, when folded inwardly, to underlie portions of both of said side wall closure flaps when said side wall closure flaps are folded inwardly,
  • said end wall closure flaps being secured in overlying relation to portions of said side wall closure flaps.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)

Description

Aug. 3, 1966 J. c. BRACKETT 3,268,149
REENFORCED FLAP CONTAINER Filed June 17, 1964 ZNVENTOR 3 JOHN C. BRACKETT I BY ATTORNEY 3,268,149 Patented August 23, 1966 3,268,149 REENFORCED FLAP CONTAINER John C. Brackett, St. Paul, Minn, assignor to Waldorf Paper Products (Iompany, St. Paul, Minn a corporation of Minnesota Filed June 17, 1964, Ser. No. 375,749 4 Claims. (Cl. 229-37) This invention relates to an improvement in a reenforced flap container and deals particularly with a container structure in which the inner closure flaps are supported during the sealing operation.
One of the biggest difficulties which is involved in the sealing of paperboard containers, and particularly those used to contain material which is yieldable rather than solid, lies in the fact that the inner closure flaps tend to fold down into the interior of the container during the sealing operation. After the adhesive has been applied to the sealing flaps, it is necessary to apply pressure to the exterior of the flaps in order to produce an effective seal. When this pressure is applied, the inner flaps have a tendency to fold down into the interior of the container where the contents of the container are not self-supporting. It is an object of the present invention to provide a means of supporting the first folded flaps in order to resist the inward folding of these flaps when pressure is applied to the later folded closing flaps.
A feature of the present invention resides in the provision of a container having rectangularly arranged side and end walls, and having closure flaps hingedly connected to at least one end of these walls. In order to support the first folded flaps from folding inwardly, auxiliary flaps are cut from the body of the last folded flaps, there auxiliary flaps being hinged to the wall of the container along the lines of fold of the flaps from which they are cut. These auxiliary flaps are preferably centrally located between the side edges of the flaps, and are designed to underlie end portions of the first folded flaps when they are folded, usually into edge abutting relation. The adhesive is then applied either to the upper surfaces of the first folded fiaps or the undersurfaces of the flaps from which the auxiliary flaps have been cut, and the remainder of these latter flaps are then folded down to overlie the end areas of the first folded flaps to be adhered in face contact therethrough. Alternatively, the flaps may be pre-coated with adhesive, or stitched in closed condition.
Under usual circumstances, the auxiliary flaps are cut from the flaps hinged to the end walls of the container where the containers are not square. Where the containers are square, the auxiliary flaps may be cut from the center portion of either opposed pair of flaps, in the area thereof adjoining the fold lines connecting these flaps to their respective walls.
Rectangular containers are usually closed by folding the flaps connected to the end walls into a common plane, and then folding the side wall closing flaps into a common plane and in edge abutting relation overlying the end wall flaps. When this is done, and sealing pressure is applied to the flaps, the flaps connected to the end walls have a tendency to swing downwardly during the time the pressure is applied. As a result, the adhesive will set while the superimposed flaps are out of face contact, forming a poor seal. By reversing the sequence of folds, and by providing the auxiliary flaps in the end wall flaps, supports may be formed by folding these auxiliary flaps inwardly prior to folding the side wall flaps in edge abutting relation, and then folding the remainder of the end wall flaps over the side wall flaps for attachment thereto.
These and other objects and novel features of the present invention will be more clearly and fully set forth in the following specification and claims.
In the drawings forming a part of the specification:
FIGURE 1 is a perspective view of the upper portion of a container with the various flaps folded outwardly to disclose the construction thereof.
FIGURE 2 is a view similar to FIGURE 1, but showing the auxiliary flaps folded inwardly to underlie portions of the side wall closing flaps.
FIGURE 3 is a perspective view of the closed and sealed container.
The container A includes a pair of side wall panels 10 and 11 and a pair of end wall panels 12 and 13. The end wall 12 is hingedly connected to the side wall panels 10 and 11 along parallel fold lines 14 and 15, and the side wall 11 is connected to the end wall 13 along a parallel fold line 16. The ends of the blank, formed by edges of the side wall 10 and end wall 13 are secured together in any suitable manner such as by the tape 17 to form a collapsible tubular container.
Side wall flaps 19 and 20 are hingedly connected to the upper edges of the side walls 10 and 11 along fold lines 21 and 22 respectively, and the end walls 12 and 13 are connected to the end wall closing flaps 23 and 24 respectively along fold lines 25 and 26. The side wall flaps 19 and 20 are preferably proper length to fold into edge abutting relation when in a common plane, while the end wall flaps 23 and 24 are usually of the same length when the container is elongated and terminate in spaced relation when folded into a common plane. The construction described to this point is conventional.
Auxiliary flaps 27 and 29 are formed within the end walls 23 and 24, and are shown in the drawings as being defined by generally U-shaped cut lines 30 and 31 which terminate at the fold lines 25 and 26 which connect the end wall closing flaps to the end walls 12 and 13. The auxilary flaps 27 and 29 are preferably located intermediate the side edges of the end Wall closing flaps, and may be individually folded along the fold lines 25 and 26 which connect the end wall closing flaps to the end walls. These auxiliary fiaps 27 and 29 form the novel feature of the present invention. In order to function properly, the auxiliary flaps 27 and 29 are positioned to underlie portions of both of the side wall closing flaps 19 and 20 along their abutting edges.
In closing the container A, the auxiliary closing flaps 27 and 29 are first folded inwardly into a common plane as indicated in dotted outline in FIGURE 2 of the drawings, and the side wall closing flaps 19 and 20 are then folded into a common plane to overlie the flaps 27 and 29 as indicated in the same figure. Adhesive is then applied to the surface of the end wall closing flaps 23 and 24 in the area thereof externally of the flaps 27 and 29, and these flaps 23 and 24 are then folded into face contact with the upper surfaces of the side wall closing flaps 19 and 20, and then sealing pressure is applied thereto. When in this closed form, the container closure appears as indicated in FIGURE 3 of the drawings.
The auxiliary closing flaps 27 and 29, being beneath the ends of the side wall closing flaps 19 and 20 assist in preventing the side wall closing fiaps from folding down wardly when pressure is applied to the flaps 23 and 24. As a result, a greater sealing pressure may be applied than is otherwise practical in a container containing material which is not self-supporting.
During recent years, the use of preapplied adhesive on the closing flaps of containers has increased materially in volume. The adhesive coated surface will adhere only The present container 23 and 24 and to the outer surfaces of end portions of the side wall closing flaps 19 and 20 in the area thereof which will underlie the end wall closing flaps. When applied in this manner, the containers may be shipped flat as the adhesive coated areas of one blank will not contact the coated surfaces of the adjoining blanks. When the containers are closed in the manner described, the adhesive coated surfaces of the side wall flaps are pressed against the similarly coated surfaces of the end wall flaps, and the containers will be tightly sealed.
In accordance with the patent statutes I have described the principles of construction and operation of my container with supported flaps, and while I have endeavored to set forth the best embodiment thereof, I desire to have it understood that obvious changes may be made within the scope of the following claims without departing from the spirit of my invention.
I claim:
1. A container flap support for use in a container including:
side and end walls hingedly connected in tubular relation,
side and end wall closure flaps hingedly connected to said side and end walls and foldable into superimposed relation to form a closure, two opposed of said closure flaps having auxiliary flaps defined by cut lines terminating at the fold lines connecting said two opposed closure flaps to their -walls,
said auxiliary flaps being independently foldable from the plane of said two opposed flaps from which they are cut,
said auxiliary flaps being folded into a common plane,
the remaining two opposed closure flaps being folded to partially overlie said auxiliary flaps,
said first mentioned two opposed closure flaps being secured in overlying relation to portions of said remaining two opposed closure flaps.
2. The structure of claim 1 and in which said remaining two opposed closure flaps are substantially in end abutting relation.
3. The structure of claim 1 and in which said auxiliary flaps are centrally located between the side edges of said two opposed closure flaps.
said end wall closure flaps being divided into an outer flap portion and an auxiliary flap by -a generally U-shaped cut line in said end wall closure flaps terminating at the fold lines connecting the same to said end walls, said outer flap portion and auxiliary flap of each end closure flap being independently foldable,
said auxiliary flap being positioned, when folded inwardly, to underlie portions of both of said side wall closure flaps when said side wall closure flaps are folded inwardly, and
said outer flap portions being foldable outwardly of said side wall closure flaps and into face contact therewith.
4. A container flap support for use in a container including:
side and end walls hingedly connected in tubular relation,
side and end Wall closure flaps hingedly connected to said side and end walls and foldable into superimposed relation to form a closure,
said end wall closure flaps being divided into an outer flap portion and an auxiliary flap by a generally U-shaped cut line in said end wall closure flaps terminating at the fold lines connecting the same to said end walls, said outer flap portion and auxiliary flap of each end closure flap being independently foldable,
said auxiliary flap being positioned, when folded inwardly, to underlie portions of both of said side wall closure flaps when said side wall closure flaps are folded inwardly,
said auxiliary flaps being folded into a common plane,
said side wall closure flaps being folded to at least partially overlie said auxiliary flaps, and
said end wall closure flaps being secured in overlying relation to portions of said side wall closure flaps.
2,693,298 11/1954 Palmer 220118 2,703,197 3/1955 Brasch 22937 GEORGE O. RALSTON, Primary Examiner.

Claims (1)

1. A CONTAINER FLAP SUPPORT FOR USE IN A CONTAINER INCLUDING: SIDE AND END WALLS HINGEDLY CONNECTED IN TUBULAR RELATION, SIDE AND END WALL CLOSURE FLAPS HINGEDLY CONNECTED TO SAID SIDE AND END WALLS AND FOLDABLE INTO SUPERIMPOSED RELATION TO FORM A CLOSURE TWO OPPOSED OF SAID CLOSURE FLAPS HAVING AUXILIARY FLAPS DEFINED BY CUT LINES TERMINATING AT THE FOLD LINES CONNECTNG SAID TWO OPPOSED CLOSURE FLAPS TO THEIR WALLS, SAID AUXILIARY FLAPS BEING INDEPENDENTLY FOLDABLE FROM THE PLANE OF SAID TWO OPPOSED FLAPS FROM WHICH THEY ARE CUT, SAID AUXILIARY FLAPS BEING FOLDED INTO A COMMON PLANE, THE REMAINING TWO OPPOSED CLOSURE FLAPS BEING FOLDED TO PARTIALLY OVERLIE SAID AUXILIARY FLAPS, SAID FIRST MENTIONED TWO OPPOSED CLOSURE FLAPS BEING SECURED IN OVERLYING RELATION TO PORTIONS OF SAID REMAINING TWO OPPOSED CLOSURE FLAPS.
US375749A 1964-06-17 1964-06-17 Reenforced flap container Expired - Lifetime US3268149A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3522906A (en) * 1968-12-20 1970-08-04 Gen Electric Carton inner flap support
US4830282A (en) * 1988-06-13 1989-05-16 Container Corporation Of America Container top closure arrangement
EP0571293A1 (en) * 1992-05-20 1993-11-24 Otor Polygonal box from sheet material and blank for the manufacture of such a box
US20110204131A1 (en) * 2010-02-19 2011-08-25 David Joe Brundage Blanks and methods for forming reinforced containers
WO2012065635A1 (en) * 2010-11-17 2012-05-24 Sca Packaging Marketing Nv Blank for a high-stacking strength box, and box made thereof
AU2013204167B2 (en) * 2012-04-30 2016-11-17 Visy R & D Pty Ltd Container for storing items

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1503516A (en) * 1920-05-18 1924-08-05 David Weil S Sons Lithographic Collapsible carton
US2329628A (en) * 1939-08-11 1943-09-14 Dewey And Almy Chem Comp Container
US2693298A (en) * 1952-06-10 1954-11-02 Package Machinery Co Bottle carrier
US2703197A (en) * 1954-05-13 1955-03-01 Anheuser Busch Carton handhole reinforcement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1503516A (en) * 1920-05-18 1924-08-05 David Weil S Sons Lithographic Collapsible carton
US2329628A (en) * 1939-08-11 1943-09-14 Dewey And Almy Chem Comp Container
US2693298A (en) * 1952-06-10 1954-11-02 Package Machinery Co Bottle carrier
US2703197A (en) * 1954-05-13 1955-03-01 Anheuser Busch Carton handhole reinforcement

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3522906A (en) * 1968-12-20 1970-08-04 Gen Electric Carton inner flap support
US4830282A (en) * 1988-06-13 1989-05-16 Container Corporation Of America Container top closure arrangement
EP0571293A1 (en) * 1992-05-20 1993-11-24 Otor Polygonal box from sheet material and blank for the manufacture of such a box
FR2691432A1 (en) * 1992-05-20 1993-11-26 Otor Sa Box with polygonal section in a sheet and blank material for producing such a box.
US20110204131A1 (en) * 2010-02-19 2011-08-25 David Joe Brundage Blanks and methods for forming reinforced containers
US8622282B2 (en) * 2010-02-19 2014-01-07 Rock-Tenn Shared Services, Llc Blanks and methods for forming reinforced containers
WO2012065635A1 (en) * 2010-11-17 2012-05-24 Sca Packaging Marketing Nv Blank for a high-stacking strength box, and box made thereof
AU2013204167B2 (en) * 2012-04-30 2016-11-17 Visy R & D Pty Ltd Container for storing items

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