US2488704A - Collapsible tray or carton - Google Patents

Collapsible tray or carton Download PDF

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US2488704A
US2488704A US19982A US1998248A US2488704A US 2488704 A US2488704 A US 2488704A US 19982 A US19982 A US 19982A US 1998248 A US1998248 A US 1998248A US 2488704 A US2488704 A US 2488704A
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edges
slits
side walls
corner flaps
walls
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US19982A
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Kenneth T Buttery
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Sutherland Paper Co
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Sutherland Paper 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
    • B65D5/20—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-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form
    • B65D5/30—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-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with tongue-and-slot or like connections between sides and extensions of other sides
    • B65D5/301—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-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with tongue-and-slot or like connections between sides and extensions of other sides the tongue being a part of a lateral extension of a side wall
    • B65D5/302—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-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with tongue-and-slot or like connections between sides and extensions of other sides the tongue being a part of a lateral extension of a side wall combined with a slot provided in an adjacent side wall

Definitions

  • v v I The'main objects of this inventionare: First, to .provide a collapsible trayor carton formed of an integral bl ll'lk which may beeasily and quickly erected either by-hand or by relatively simple machines designed for the purpose. Second. to prcvidea tray or box formed of an integral blank which may be shipped or transported in the knockdown and quickly set up, as above stated, and one which when set up or erected, is relativel strong and rigid, both the side end walls being supported in an upright position. v
  • FIG. 1 is a top perspective view of a box or. tray embodying my invention in fully erected position.
  • Fig. 2 is a-fragmentary view in longitudinal section illustrating parts in partially set up or erected position and one of the stages in such to improvements in
  • Fig. 3 is a fragmentary perspective view illustrating another stage in the erection of the parts.
  • Fig. 4 is a plan view of the blank in the flat.
  • Fig. 5 is a fragmentary longitudinal section of a modified form or embodiment of my invention with the box in erected position.
  • Fig. 6 is a fragmentary plan view of the blank in the fiat of the modified form of my invention shown in Fig. 5.
  • My improved collapsible box or tray is formed of an integral blank shown in the fiat in Fig. 4 and comprising a bottom I, side walls 2-2 and end walls 33.
  • the side walls are hingedly connected to the bottom by score lines, conventionally illustrated at 4-4, while the end walls are hingedly connected to the bottom by the scores, conventionally illustrated at 55.
  • the end walls 33 have corner flaps G6 extending from the ends thereof and hingedly connectedthereto at
  • the end edges 8-8 of the side Walls are aligned with the hinging score 5 for the end walls to the bottom.
  • the hinging scores 1 connecting the corner flaps to the end walls are aligned with the hinging scores 4,4 connecting the side walls to the bottom.
  • flaps are inclined diagonally outward as viewed z. a disposed at an angle. to the main portions of the slits or at a less angle relative to the. top or bottom edges of the side walls than the outer portions of the slits as consideredrelative to their open ends. This results in a deflectable side portion l 2 at each end of each side wall.
  • the corner flaps have inwardly inclined notches l3 in their side edges with slits l4 ex tending inwardly from the notches and aligned with the bottom edgesof the notches. This results in triangular'tongu'e-like portions is which engage within the inner sides of the side walls when the parts are in fully erected position with the notches and slits of the corner flaps engaged with the slits of the side walls.
  • the cutting away and spacing of the inclined bottom edges of the corner flaps from the end greatly facilitates the erection of th tray or box, particularly when erected by machi In erection the side walls are turned or swung upwardly as indicated, in Fig.
  • the end walls are then swung upwardly and the corner flaps turned inwardly as the end walls are swung to upright position.
  • the corner flaps engage the defiectable portions I2 of the side walls and move them inwardly so that the inclined bottom edges 9 of the corner flaps easily pass into the slits of the side walls and completely swing to erected position.
  • the side walls spring outwardly against the corner flaps with the bottom edges of the notches and slits l4 engaging the upper edges of the slits ID of the side walls, and with the tip portions l5 of the corner flaps locked on the inner side of the side walls as shown in Figs. 1 and 5.
  • the structure ofthe present application greatly facilitates such machine erection as the inclined lower edges of the end inclined bottom edges of the corner flaps pass easily and freely through the slits IU of the side walls and the parts become interlocked without special manipulation, and at the same time a very secure retainingengagement is effected with the end edges ofthe side walls abutting the inner sides of the ends, thereby holding both side and end walls in vertical position.
  • the end walls have outer portions l6 which are aligned with the hinging score 5 and inwardly inclined inner portions I I terminating at the slits Hi. This further facilitates the erection of the box or tray as the bottom edges H are engaged by the bottom edges 9 of the corner flaps as the 3 parts are moved to erected position, thus providing a further camming action in the deflecting of the "deflectable portions 12 of the side walls.
  • hinge connections for the corner flaps to the end walls being aligned in the flat blank with the hinge connection for the side walls to the bottom, the ends of the side walls being in the flat blank aligned with the hinge connections for the end walls to the bottom, the bottom edges of the corner flaps in the fiat blank bein spaced from and outwardly inclined relative to the end edges of the side walls, the side walls having slits opening at their end edges and extending diagonally outward from adjacent their bottom edges, the outer end portions of the slits being disposed at a less angle than their inner portions, the corner flaps having notches downwardly inclined from their side edges opposite their hinge connections to the end walls and inwardly extending diagonally disposed slits aligned with the lower edges of the notches, the said inclined bottom edges of said corner flaps and thesaid notches in the said side edges thereof facilitating'entra'nce of the bottom edges of the comer flaps through said slits in said side walls and the engagement of the lower edges of the notches and slits in the
  • a collapsible tray or box formed of an integral blank comprising a bottom and side and end walls hingedly connected thereto, and corner flaps hingedly connected to the ends of the end walls and foldable on the outer sides of the side walls when they are in erected position, the hinge connections for the corner flaps to the end walls being aligned in the fiat blank with the hinge connection for the side walls to the bottom, the ends of the side walls being in the flat blank aligned with the hinge connections for the end walls to the bottom, the bottom edges of the of the side walls, the side walls having slits open ing at their end edges and extending diagonally outward from adjacent their bottom edges, the corner flaps having notches in their side edges opposite their hinge connections to the end walls, the said inclined bottom edges of said corner flaps and the said notches in the said side edges thereof facilitating entrance of the bottom edges of the corner fiapslthrough said slits in said side walls and the engagement of the lower edges of the notches in the side edges of the corner flaps with the outer edges of
  • a collapsible tray or box formed of an integral blank comprisin a bottom and side and end walls hingedly connected thereto, and corner flaps hingedly connected to the ends of the end walls and foldable on the outer sides of the side walls when they are in erected position, the bottom edges of the corner flaps in the flat blank being spaced from and outwardly inclined relative to the end edges of the side walls, the side walls having slits opening at their end edges and extending diagonally outward therefrom, the outer end portions of the slits being disposed at a less angle than their inner portions, the corner flaps having notches in their side edges opposite their hinge connections and having inwardly extendin diagonally disposed slits extending the notches, the said inclined bottom edges of said corner flaps and the said notches in the said side edges thereof facilitating entrance of the bottom edges of thecorner flaps through said slits in said'side walls and the engagement of the lower edges of the notches and slits in the side edges of the corner flaps with the outer edges of
  • tegral blank comprising a bottom and side and endwalls hingedly connected thereto, and corner flaps hingedly connected to the ends of the end walls and foldable on the outer sides of the side walls when they are in erected position, the bottom edges of the corner flaps in the flat blank being spaced from and outwardly inclined relative to the end edges of the side walls, the side walls having slits opening at their end edges and extending diagonally outward therefrom, the outer end portions of the slits being disposed at a less angle than their inner portions, the corner flaps having inwardly extending diagonally disposed slits opening to their side edges opposite their hinge connections to the end walls, the said inclined bottom edges of said corner flaps facilitating entrance of the bottom edges of the corner flaps through said slits in said side walls.
  • a collapsible tray or box formed of an integral blank comprising a bottom and side and end walls hingedly connected thereto, and corner flaps hingedly connected to the ends of the end walls and foldable on the outer sides of the side walls when they are in erected position, the hinge connections for the corner flaps to the end walls being aligned in the flat blank with the hinge connection for the side walls to the bottom, the end edges of the side walls in the flat blank having outer portions aligned with the hinge connections for the end walls to the bottom and having inwardly inclined inner portions, the
  • a collapsible tray or box formed of an integral blank comprising a bottom and side and end walls hingedly connected thereto, and corner flaps hingedly connected to the ends of the end walls and foldable on the outer sides of the side walls when they are in erected position, the hinge connections for the corner flaps to the end walls being aligned in the flat blank with the hinge connection for the side walls to the bottom,
  • the corner flaps having slits opening to their side edges opposite their hinge connections to the end walls, the said inclined bottom edges of said corner flaps facilitating entrance of the bottom edges of the corner flaps through said slits in said side walls and the engagement of the lower edges the slits in the side edges of the corner flaps with the outer edges of the said side wall slits with portions of the corner flaps interlocking within portions of the side' walls above their slits.
  • a collapsible tray or box formed of an integral blank comprising-a bottom and side and end walls hingedly connected thereto, and cornernaps hingedly connected to the ends of the end walls and foldable on the outer sides of theside walls when they are in erected position, the hinge connections for the corner flaps to the end walls being aligned in the flat blank with the hinge connection for'the side walls to the bottom, the
  • side walls having slits opening at their end edges and extending diagonally outward from adjacent their bottom edges of the slits being disposed at a less ,angle than their portions, the corner flaps having notches downwardly inclined from their side edges opposite their hinge connections and having inwardly extending diagonally disposed slits aligned with the lower edges of the notches, the lower edges of the slits ofthe corner flaps engegeable with theupper edges of side wall slits with portions of the corner flaps interlocking within portions of the side walls above their slits.
  • a collapsible tray or box formed of an integral blank comprising a bottom and side and end walls hingedly connected thereto, and corner flaps hingedly connected to the ends of the end walls and foldable on the outer sides of the side walls when they are in erected position, the side walls having diagonally disposed inwardly inclined slits opening at their end edges and having inwardly inclined edge portions extending to the said slits, the corner flaps having outwardly inclined bottom edges spaced from the end edges of the side walls in the blank, the corner flaps having slits downwardly inclined from their side edge opposite from their hinge connections and spaced fromtheir bottom edges to provide up- -swardly directed tongue portions engageable with the inner sides of the side walls, the adjacent inclined edges of the corner flaps and the side wall end edges in the blank facilitating the interlocking engagement of the corner flaps with the side walls when the tray is erected.
  • a collapsible tray or box formed of an integral blank comprising a bottom and side and end walls hingedly connected thereto, and corner flaps hingedly connected to the ends of the end walls and foldable on the outer sides of the side walls when they are in erected position, the side walls having diagonally disposed inwardly inclined slits opening at their end edges, the corner flaps having outwardly inclined bottom edges spaced from the end edges of th side walls in the blank, the corner flaps having slits downwardly inclined from their side edges opposite from their hinge connections and spaced from their bottom edges to provide upwardly directed tongue portions engageable with the inner sides of the side walls, the adjacent inclined edges of the corner flaps and the side wall end edges in the blank facilitating the interlocking engagement of the comer flaps with the side walls when the tray is erected.
  • a collapsible tray or box formed of an integral blank comprising a bottom and side and end walls hingedly connectedthereto, andcorner flaps hingedly connected to the ends of the end walls and foldable on the outer sidesof the side walls when they are in erected position, the side walls having diagonally disposed inwardly inclined slits opening at their end edges having inwardly inclined edge portions extending to the said slits, the bottom edges of the corner flaps being spaced outwardly in the flat blank from the hinge connections for the end walls to the bottom.

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  • Mechanical Engineering (AREA)
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Description

Nov. 22, 1949 K. "r. BUTTERY 2,38,704
COLLAPSIBLE TRAY OR CARTON Filed April 9, 1948 2 Sheets-Sheet 1 IIV VEN TOR.
Nov. 22, 194% I Filed April 9, 1
' K. T. BU'ITERY COLLAPSIBLE' TRAY 0R CARTON 2 Sheets-Sheet 2 erection.
Patented Nov. 22, 1949" UNITED:- 1 PATENT.
- I COLLAPSlBLE TRAY on CARTON Kenneth T. Buttery, Kalamazoo, Mich, assignor to' Sutherland Paper Company, Kalamazoo, Micln, a corporation of Michigan Application April 9, 1948, Serial No. 19,982
. g g 1 'This invention relates collapsible trays or cartons. v v I The'main objects of this inventionare: First, to .provide a collapsible trayor carton formed of an integral bl ll'lk which may beeasily and quickly erected either by-hand or by relatively simple machines designed for the purpose. Second. to prcvidea tray or box formed of an integral blank which may be shipped or transported in the knockdown and quickly set up, as above stated, and one which when set up or erected, is relativel strong and rigid, both the side end walls being supported in an upright position. v
Further objects relating to details and economies of the invention will definitely appear from the description to follow. The invention is pointed out in the claims. A preferred embodiment of the apparatus for carrying out the method of the invention is clearly illustrated in the accompanying drawing in which g Fig. 1 is a top perspective view of a box or. tray embodying my invention in fully erected position. Fig. 2 is a-fragmentary view in longitudinal section illustrating parts in partially set up or erected position and one of the stages in such to improvements in Fig. 3 is a fragmentary perspective view illustrating another stage in the erection of the parts.
Fig. 4 is a plan view of the blank in the flat.
Fig. 5 is a fragmentary longitudinal section of a modified form or embodiment of my invention with the box in erected position.
Fig. 6 is a fragmentary plan view of the blank in the fiat of the modified form of my invention shown in Fig. 5.
My improved collapsible box or tray is formed of an integral blank shown in the fiat in Fig. 4 and comprising a bottom I, side walls 2-2 and end walls 33. The side walls are hingedly connected to the bottom by score lines, conventionally illustrated at 4-4, while the end walls are hingedly connected to the bottom by the scores, conventionally illustrated at 55. The end walls 33 have corner flaps G6 extending from the ends thereof and hingedly connectedthereto at |--1. The end edges 8-8 of the side Walls are aligned with the hinging score 5 for the end walls to the bottom. The hinging scores 1 connecting the corner flaps to the end walls are aligned with the hinging scores 4,4 connecting the side walls to the bottom. The bottom edges 9 of the corner Q10 Claims. (Cl. 229-) flaps are inclined diagonally outward as viewed z. a disposed at an angle. to the main portions of the slits or at a less angle relative to the. top or bottom edges of the side walls than the outer portions of the slits as consideredrelative to their open ends. This results in a deflectable side portion l 2 at each end of each side wall.
The corner flaps have inwardly inclined notches l3 in their side edges with slits l4 ex tending inwardly from the notches and aligned with the bottom edgesof the notches. This results in triangular'tongu'e-like portions is which engage within the inner sides of the side walls when the parts are in fully erected position with the notches and slits of the corner flaps engaged with the slits of the side walls. The cutting away and spacing of the inclined bottom edges of the corner flaps from the end greatly facilitates the erection of th tray or box, particularly when erected by machi In erection the side walls are turned or swung upwardly as indicated, in Fig. 2, preferably in a somewhat inwardly inclined relation; the end walls are then swung upwardly and the corner flaps turned inwardly as the end walls are swung to upright position. The corner flaps engage the defiectable portions I2 of the side walls and move them inwardly so that the inclined bottom edges 9 of the corner flaps easily pass into the slits of the side walls and completely swing to erected position. When released the side walls spring outwardly against the corner flaps with the bottom edges of the notches and slits l4 engaging the upper edges of the slits ID of the side walls, and with the tip portions l5 of the corner flaps locked on the inner side of the side walls as shown in Figs. 1 and 5.
While this greatly facilitates machine erection it is also advantageous in hand erection, that is, it is possible to very quickly erect the box or tray edges of the side walls, as viewed\ in the blank,
-by hand if desired; however, the boxes or trays are used in large commercial quantities and machine erection is very economical. I
The structure ofthe present application greatly facilitates such machine erection as the inclined lower edges of the end inclined bottom edges of the corner flaps pass easily and freely through the slits IU of the side walls and the parts become interlocked without special manipulation, and at the same time a very secure retainingengagement is effected with the end edges ofthe side walls abutting the inner sides of the ends, thereby holding both side and end walls in vertical position.
In'the modification shown in Figs. 5 and 6 the end walls have outer portions l6 which are aligned with the hinging score 5 and inwardly inclined inner portions I I terminating at the slits Hi. This further facilitates the erection of the box or tray as the bottom edges H are engaged by the bottom edges 9 of the corner flaps as the 3 parts are moved to erected position, thus providing a further camming action in the deflecting of the "deflectable portions 12 of the side walls.
Otherwise, the parts are as in the structure previously described.
Attention is directed in this connection to my pending application Serial No. 638,165, filed December 29, 1945. The present invention is a very substantial improvement on the structure there illustrated in that it greatly facilitates the erection, both by hand and machine.
I have illustrated and described my invention in highly practical forms, both from the standpoint of the completely erected article and practicability in both hand and machine erection. I have used the terms side and end walls as matters of convenience in description, but it will be understood that the boxes or trays are of various shapes and designed for packaging various articles, pics, for example. It is to believed that the use of the terms side" and end walls materially simplifies the terminology of the specification and claims. I have not attempted to illustrate or describe other embodiments or adaptations of the invention as it is believed this disclosure will enable those skilled in the art to walls when they are in erected position, the
hinge connections for the corner flaps to the end walls being aligned in the flat blank with the hinge connection for the side walls to the bottom, the ends of the side walls being in the flat blank aligned with the hinge connections for the end walls to the bottom, the bottom edges of the corner flaps in the fiat blank bein spaced from and outwardly inclined relative to the end edges of the side walls, the side walls having slits opening at their end edges and extending diagonally outward from adjacent their bottom edges, the outer end portions of the slits being disposed at a less angle than their inner portions, the corner flaps having notches downwardly inclined from their side edges opposite their hinge connections to the end walls and inwardly extending diagonally disposed slits aligned with the lower edges of the notches, the said inclined bottom edges of said corner flaps and thesaid notches in the said side edges thereof facilitating'entra'nce of the bottom edges of the comer flaps through said slits in said side walls and the engagement of the lower edges of the notches and slits in the side edges of the corner flaps with the outer edges of the said side wall slits and the supporting of the end walls when erected in supported engagement with the end edges of the side walls.
2. A collapsible tray or box formed of an integral blank comprising a bottom and side and end walls hingedly connected thereto, and corner flaps hingedly connected to the ends of the end walls and foldable on the outer sides of the side walls when they are in erected position, the hinge connections for the corner flaps to the end walls being aligned in the fiat blank with the hinge connection for the side walls to the bottom, the ends of the side walls being in the flat blank aligned with the hinge connections for the end walls to the bottom, the bottom edges of the of the side walls, the side walls having slits open ing at their end edges and extending diagonally outward from adjacent their bottom edges, the corner flaps having notches in their side edges opposite their hinge connections to the end walls, the said inclined bottom edges of said corner flaps and the said notches in the said side edges thereof facilitating entrance of the bottom edges of the corner fiapslthrough said slits in said side walls and the engagement of the lower edges of the notches in the side edges of the corner flaps with the outer edges of the said side wall slits and the supporting of the end walls when erected in supported engagement with the end edges. of the side walls.
3. A collapsible tray or box formed of an integral blank comprisin a bottom and side and end walls hingedly connected thereto, and corner flaps hingedly connected to the ends of the end walls and foldable on the outer sides of the side walls when they are in erected position, the bottom edges of the corner flaps in the flat blank being spaced from and outwardly inclined relative to the end edges of the side walls, the side walls having slits opening at their end edges and extending diagonally outward therefrom, the outer end portions of the slits being disposed at a less angle than their inner portions, the corner flaps having notches in their side edges opposite their hinge connections and having inwardly extendin diagonally disposed slits extending the notches, the said inclined bottom edges of said corner flaps and the said notches in the said side edges thereof facilitating entrance of the bottom edges of thecorner flaps through said slits in said'side walls and the engagement of the lower edges of the notches and slits in the side edges of the corner flaps with the outer edges of the said sidewall slits with portions of the corner flaps in interlocking engagement with the side walls.
4. A collapsible tray or box formed of an in- 5. tegral blank comprising a bottom and side and endwalls hingedly connected thereto, and corner flaps hingedly connected to the ends of the end walls and foldable on the outer sides of the side walls when they are in erected position, the bottom edges of the corner flaps in the flat blank being spaced from and outwardly inclined relative to the end edges of the side walls, the side walls having slits opening at their end edges and extending diagonally outward therefrom, the outer end portions of the slits being disposed at a less angle than their inner portions, the corner flaps having inwardly extending diagonally disposed slits opening to their side edges opposite their hinge connections to the end walls, the said inclined bottom edges of said corner flaps facilitating entrance of the bottom edges of the corner flaps through said slits in said side walls.
5. A collapsible tray or box formed of an integral blank comprising a bottom and side and end walls hingedly connected thereto, and corner flaps hingedly connected to the ends of the end walls and foldable on the outer sides of the side walls when they are in erected position, the hinge connections for the corner flaps to the end walls being aligned in the flat blank with the hinge connection for the side walls to the bottom, the end edges of the side walls in the flat blank having outer portions aligned with the hinge connections for the end walls to the bottom and having inwardly inclined inner portions, the
tending diagonally disposed slits aligned with thelower edges of the notches, the said inclined bottom edges of said corner flaps and the said notches in the said side edges thereof facilitating entrance of the bottom edges of the corner flaps through said slits in said side walls and the engagement of the lower edges of the notches and slits in the side edges of the corner flaps with the outer edges of the said side wall slits with portions of the corner flaps interlocking within portions of the side walls above their slits, and the supporting of the end walls when erected in supported engagement with the endedges of the side walls. Y
6. A collapsible tray or box formed of an integral blank comprising a bottom and side and end walls hingedly connected thereto, and corner flaps hingedly connected to the ends of the end walls and foldable on the outer sides of the side walls when they are in erected position, the hinge connections for the corner flaps to the end walls being aligned in the flat blank with the hinge connection for the side walls to the bottom,
the end edges of the side walls in the flat blank being disposed at a less angle than their innerportions, the corner flaps having slits opening to their side edges opposite their hinge connections to the end walls, the said inclined bottom edges of said corner flaps facilitating entrance of the bottom edges of the corner flaps through said slits in said side walls and the engagement of the lower edges the slits in the side edges of the corner flaps with the outer edges of the said side wall slits with portions of the corner flaps interlocking within portions of the side' walls above their slits.
7. A collapsible tray or box formed of an integral blank comprising-a bottom and side and end walls hingedly connected thereto, and cornernaps hingedly connected to the ends of the end walls and foldable on the outer sides of theside walls when they are in erected position, the hinge connections for the corner flaps to the end walls being aligned in the flat blank with the hinge connection for'the side walls to the bottom, the
side walls having slits opening at their end edges and extending diagonally outward from adjacent their bottom edges of the slits being disposed at a less ,angle than their portions, the corner flaps having notches downwardly inclined from their side edges opposite their hinge connections and having inwardly extending diagonally disposed slits aligned with the lower edges of the notches, the lower edges of the slits ofthe corner flaps engegeable with theupper edges of side wall slits with portions of the corner flaps interlocking within portions of the side walls above their slits.
8. A collapsible tray or box formed of an integral blank comprising a bottom and side and end walls hingedly connected thereto, and corner flaps hingedly connected to the ends of the end walls and foldable on the outer sides of the side walls when they are in erected position, the side walls having diagonally disposed inwardly inclined slits opening at their end edges and having inwardly inclined edge portions extending to the said slits, the corner flaps having outwardly inclined bottom edges spaced from the end edges of the side walls in the blank, the corner flaps having slits downwardly inclined from their side edge opposite from their hinge connections and spaced fromtheir bottom edges to provide up- -swardly directed tongue portions engageable with the inner sides of the side walls, the adjacent inclined edges of the corner flaps and the side wall end edges in the blank facilitating the interlocking engagement of the corner flaps with the side walls when the tray is erected.
9. A collapsible tray or box formed of an integral blank comprising a bottom and side and end walls hingedly connected thereto, and corner flaps hingedly connected to the ends of the end walls and foldable on the outer sides of the side walls when they are in erected position, the side walls having diagonally disposed inwardly inclined slits opening at their end edges, the corner flaps having outwardly inclined bottom edges spaced from the end edges of th side walls in the blank, the corner flaps having slits downwardly inclined from their side edges opposite from their hinge connections and spaced from their bottom edges to provide upwardly directed tongue portions engageable with the inner sides of the side walls, the adjacent inclined edges of the corner flaps and the side wall end edges in the blank facilitating the interlocking engagement of the comer flaps with the side walls when the tray is erected.
10. A collapsible tray or box formed of an integral blank comprising a bottom and side and end walls hingedly connectedthereto, andcorner flaps hingedly connected to the ends of the end walls and foldable on the outer sidesof the side walls when they are in erected position, the side walls having diagonally disposed inwardly inclined slits opening at their end edges having inwardly inclined edge portions extending to the said slits, the bottom edges of the corner flaps being spaced outwardly in the flat blank from the hinge connections for the end walls to the bottom.
' KENNETH T. BUTTERY.
REFERENCES CITED '1- The following references are of record in the
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2677493A (en) * 1949-03-14 1954-05-04 Marathon Corp Interfitting lock for containers
US2712409A (en) * 1949-12-10 1955-07-05 Sutherland Paper Co Collapsible box or box cover
US3211358A (en) * 1963-02-15 1965-10-12 Bradford Speed Packaging And D Corner locks for folding boxes
US5402932A (en) * 1994-05-19 1995-04-04 James River Paper Company, Inc. Receptacle with corner lock

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE170263C (en) *
US472797A (en) * 1892-04-12 Knockdown box
US704549A (en) * 1901-06-20 1902-07-15 American Folding Box Company Safety-box.
US2345810A (en) * 1941-04-11 1944-04-04 Raoul J Gruenberg Folding box
US2447563A (en) * 1947-04-11 1948-08-24 Sutherland Paper Co Collapsible covered container or box

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE170263C (en) *
US472797A (en) * 1892-04-12 Knockdown box
US704549A (en) * 1901-06-20 1902-07-15 American Folding Box Company Safety-box.
US2345810A (en) * 1941-04-11 1944-04-04 Raoul J Gruenberg Folding box
US2447563A (en) * 1947-04-11 1948-08-24 Sutherland Paper Co Collapsible covered container or box

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2677493A (en) * 1949-03-14 1954-05-04 Marathon Corp Interfitting lock for containers
US2712409A (en) * 1949-12-10 1955-07-05 Sutherland Paper Co Collapsible box or box cover
US3211358A (en) * 1963-02-15 1965-10-12 Bradford Speed Packaging And D Corner locks for folding boxes
US5402932A (en) * 1994-05-19 1995-04-04 James River Paper Company, Inc. Receptacle with corner lock

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