US3148823A

US3148823A - Reclosable container

Info

Publication number: US3148823A
Application number: US250938A
Authority: US
Inventors: Donald E Diez
Original assignee: Union Carbide Corp
Current assignee: Union Carbide Corp
Priority date: 1963-01-11
Filing date: 1963-01-11
Publication date: 1964-09-15
Anticipated expiration: 1981-09-15

Description

Sept. 15, 1.964 D. E. DIEZ RECLOSABLE CONTAINER Filed Jan. 11

FIG. 2

INVENTOR.

DONALD E. DIEZ A TTORNE Y United States Patent 3,148,823 RECLOSABLE CONTAINER Donald E. Diez, White Bear Lake, Minn, assignor to Union Carbide Corporation, a corporation of New York Filed Jan. 11, 1963, Ser. No. 250,938 11 Claims. (Cl. 229-51) This invention relates to a container. More specifically, this invention relates to a reclosable container which is particularly adaptable for packaging comestibles.

It is the principal object of the present invention to provide a container which can be initially closed, opened to provide access to the contents therein without any undesirable damage to the container and reclosed to provide protected storage for the partially depleted contents.

Further objects and advantages of the present invention will be obvious from the description which follows, taken in conjunction with the accompanying drawings wherein:

FIGURE 1 is a perspective view of a container of the present invention, shown open;

FIGURE 2 is a perspective View of the container of FIGURE 1, shown partially closed;

FIGURE 3 is a perspective view of the container of FIGURE 1, shown fully closed;

FIGURE 4 is a perspective view of a modified container of the present invention, shown open; and

FIGURE 5 is a perspective view of another modified container of the present invention, shown open.

Briefly, the containers of the present invention comprise (1) an integral open receptacle and (2) a sectionalized overwrap portion, unitive with the open receptacle, which is adapted to be folded about the open receptacle and held in place by locking tongue and slit.

Turning now to the accompanying drawings wherein like par-ts are identified by the same reference numerals, and more specifically referring to FIGURES 1, 2 and 3, the container is shown to include an integral open receptacle generally indicated by reference numeral and a sectionalized overwrap portion generally indicated by reference numeral 17.

Open receptacle 10 is shown to have a front wall 11, rear wall 12, bottom wall 13 and

end walls

14 and 15. Unitive with upper edge 16 of front wall 11 is overwrap portion 17 which is provided with

transverse score lines

33, 34, 35 and 36 dividing the overwrap portion into a series of sections comprising a first side section 18, a bot tom section 21, a second side section 24, top section 26 and transverse flap 29. Overwrap portion can be connected to or integral with open receptacle 1ft. Overwrap portion 17 folds about open receptacle 19 in a clockwise direction with first side section 18, bottom section 21 and second side section 24 adapted to be coextensively folded over front wall 11, bottom wall 13 and rear wall 12. This is clearly shown in FIGURE 2. Top section 26 is adapted to be folded over and to form the top wall of receptacle 10, as is shown in FIGURE 2.

First side section 18 and second side section 24 are generally provided with contiguous hinged end flaps 2t) and 25 respectively, which are adapted to be folded along

lines

37 and 39 and over end Walls 14 and of receptacle It), as is shown in FIGURE 2 where end flaps 20 and are folded over end wall 14. First side section 18 is also provided with a transverse slit 19, the function of which will be subsequently described.

Bottom section 21 is also provided with contiguous hinged end flaps 22 which generally have longitudinal slits 23 therein. Hinged end flaps 22 are adapted to be folded along lines 38 and superimposed over

end flaps

20 and 25 of first side section 18 and second side section 24, respectively. This is clearly shown in FIGURE 2 where 3,148,823 Patented Sept. 15, 1964 end flap 22 is in a position to be superimposed over

end flaps

29 and 25.

Top section 26 is provided with contiguous hinged end flaps 27, which in the embodiment shown in FIGURES 1-3, have locking tongues 28 thereon. The shape of these tongues is not critical and, for example, can be a dovetail shape, as indicated by the tongue in FIGURE 1 and indicated by the reference numeral 28, or can be a tapered shape, as shown by the tongue in FIGURE 5 and indicated by the reference numeral 42. End flaps 27 are adapted to be folded along l'mes 40 and superimposed over end flaps 22 of bottom section 21 and each tongue 28 inserted into corresponding and complementary slits 23 of end flaps 22 to form a neat closure.

Also, top section 26 is contiguous with hinged transverse flap 29 which is adapted to be folded along score line 36 and superimposed over first side section 18. Transverse flap 29 has a locking tongue 30 which can be of any desired configuration, as for example, a dovetail shape, as shown by the tongue in FIGURE 1 and indicated by the numeral 30, or it can be a tapered shape, as shown by the tongues in FIGURES 4 and 5 and indicated by reference numerals 41. Locking tongue 30 is inserted in complementary transverse slit 19 in first side section 18 to provide a neat front closure.

It is to be understood that overwrap 17 can be secured in its folded position about receptacle 10 by the use of the aforementioned locking tongues and slits and when desired and feasible, depending upon the nature of the material from which the container is formed, by local seals, e.g., heat or adhesive. This is more fully understood by reference to FIGURE 3 where the container of FIGURE 1 is shown fully closed. Here overwrap 17 is shown folded about open receptacle 10 and is secured by inserting

locking tongues

28 and 30 in

slits

23 and 19 respectively. If desired, the overwrap can be additionally secured by locally sealing the locking tongues in place, at points indicated by the reference numerals 44 and 45 in FIGURE 3.

The container shown in FIGURE 4 is one with which local seals can be advantageously utilized. This container is the same as that shown in FIGURES 1-3 with the exception that end flaps 22 do not have longitudinal slits and end flaps 27 are devoid of any locking tongues. With such an arrangement, end flaps 27 are locally sealed, by appropriate means, to end flaps 22.

As stated, local seals can also be utilized to further se cure the locking tongues in place. Thus, a container of the present invention can be closed and locally sealed in the area of the locking tongues and slits in such a manner that the seal is rupturable by slight force, thus allowing for free disengagement of the locking tongues from their complementary slits to provide initial access to the contents therein. The container can then be reclosed, through the locking tongues and complementary slits, to provide protected storage for the partially depleted contents of the container.

It is also possible to locally seal

end flaps

20 and 25 to

end walls

14 and 15 of open receptacle 10 thereby holding partially folded overwrap 17 in place, as shown in FIGURE 2, with the result that further folding of the overwrap is facilitated and simplified.

Considering now the container shown in FIGURE 5, this container is the same as is shown in FIGURE 1 with the exception that first side section 18 has no end flaps and that transverse flap 29 has end flaps 31. End flaps 31 are adapted to be folded along lines 46 and to be inserted between

end walls

14 and 15 and end flaps 22.

Where the nature of the material being packaged, usually a comestible, so requires, a thin overlay, as partially shown in FIGURE 1 by reference numeral 47, can be bonded to the upper edges of open receptacle 10 to 35 provide a hermetic seal which further protects the contents of the container. Upon initial opening of the container, this overlay is manually stripped away to provide access to the contents. Overlay 47 can be bonded to open receptacle 19 by any of several means known to the art by which a membrane is bonded to another material such as by heat bonding, adhesive bonding, and the like. The membrane used for overlay 47 generally has a thickness of from about /2 mil to about 2 mils and preferably from about 7 4 mil to about 1 /2 mils. Suitable thermoplastics to be used for the overlay have a tensile modulus (ASTMD38254TC) of about 25,960 p.s.i. to about 115,000 p.s.i.; illustrative of which are polyvinylidene chloride, polyvinyls, polyethylene, polypropylene, polystyrene, polyesters, regenerated cellulose and the like, and copolymers such as a copolymer of vinyl chloride and vinyl acetate and the like. When a polyvinylidene chloride resin is used, both for the overlay and the container, overlay 47 is directly bonded to the upper edges of open receptacle 1th by the inherent adhesive properties of these resins without the need of heat or adhesive bonding. An overlay of this nature can also be initially stripped away and rebonded to the open receptacle to provide continued hermetic sealing. Other suitable mcmbranes are those made from metal foil, such as aluminum foil; Glassine paper; paper and the like.

As indicated previously, containers and components thereof of the present invention are generally produced from a formable sheet material. As a rule these containers have a thickness of from about 4 mils to about mils, and preferably from about 12 mils to about 18 mils. Suitable thermoplastic materials from which containers of the present invention can be formed have a tensile modulus equal to or greater than 100,000 p.s.i.; illustrative of which are polyethylene, polypropylene, polyvinyls, polyesters, polyethers, polycarbonates, polyhydroxyethcrs, polystyrene, polyacrylics, cellulose acetate, and the like, and copolymers such as a copoiymer of ethylene and propylene, and the like. The preferred thermoplastic is polyethylene due to its excellent resistance to gas permeation and chemical attack.

If desired, thermoplastic materials used to form containers of the present invention can contain various additives, for example fillers, pigments, plasticizers, stabilizers, preservatives, lubricants, anti-oxidants, and the like.

Generally the containers of the present invention are produced from a single formable sheet by a series of simultaneous or sequential forming operations which are described in detail below. However, it is to be understood that containers of the present invention can be assembled from a pro-formed open receptacle and a preformed overwrap by bonding the overwrap to the upper front edge of the open receptacle. Containers of the present invention can comprise an open receptacle and an overwrap of the same or different material, and having the same or different thicknesses.

It is to be pointed out that containers of the present invention can be formed from materials other than thermoplastics. Choice of materials will depend upon several factors such as the nature of the comestible being packaged and relative costs. For example, integral open receptacles forming part of the containers of the present invention can be formed from metal foils such as aluminum and the like, and from pressed paper pulp. Also, overwrap portions of containers of the present invention can be formed from laminates of paper and metal foils such as aluminum and the like, and from paper coated with a thermoplastic such as polyethylene or a foamed thermoplastic such as foamed high-density polyethylene, polystyrene and the like.

Open receptacles of containers of the present invention can be formed by any method known in the art for forming an integral open receptacle. Illustrative of such methods are vacuum molding, compression molding, cold forming and the like.

Overwrap portions of containers of the present invention can similarly be formed from a sheet material by any method known in the art such as cutting and scoring by hand, stamping with steel rule cutting and scoring dies, and the like. The overwrap portion can also be molded, as for example by compression molding using matched metal dies. The ovcrwrap portion can also bear printed matter indicative of the contents of the container applied by any means commonly known in the art.

The overwrap portion can be folded about an open receptacle to form a closed container of the present invention by hand or by automatic machinery known in the art, and locally sealed by conventional means, also known in the art.

Furthermore, containers of the present invention when in an open position shown in FIGURE 1 are readily nestable one in the other to provide maximum utilization of a minimum of storage space.

Containers of the present invention are useful for packaging various articles and are especially useful for packaging cornestibles, in bulk form, such as shredded coconut and the like.

What is claimed is:

l. A container, particularly adaptable for packaging comestibles, comprising an integral open receptacle having as integral parts a front wall, a bottom wall, a rear wall and end walls, an overwrap portion adapted to be folded about said open receptacle, said overwrap portion being unitive with said open receptacle along the upper edge of said front wall and being provided with transverse score lines dividing said overwrap portion into a series of sections comprising a first side section, a bottom section, a second side section, a top section and transverse fiap, said first side, bottom and second side sections adapted to be coext nsively folded over said front, bottom and rear walls respectively of said open receptacle, said top section adapted to be folded over and form the top wall of said open receptacle and means to maintain said overwrap portion folded over said receptacle to form a closed container.

2. A container, particularly adaptable for packaging comestioles, comprising an integral open receptacle and an overwrap portion adapted to be folded about said open receptacle, said open receptacle having as integral parts, a front wall, a bottom wall, a rear wall, and end walls, said overwrap portion being unitive with said open receptacle along the upper edge of said front wall, and being provided with transverse score lines dividing said overwrap portion into a series of sections comprising a first side section, a bottom section, a second side section, a top section and transverse flap, said first side, bottom and second side sections adapted to be coextensively folded over said front, bottom and rear walls respectively of said open receptacle, said top section adapted to be folded over and form the top wall of said open receptacle, said first and second side sections being provided with contiguous hinged end flaps adapted to be folded over said end walls of said open receptacle, said first side section being provided with a transverse slit, said bottom section being provided with contiguous hinged end flaps having longitudinal slits therein adapted to be superimposed over said end flaps of said first and second sections, said top section being provided with contiguous hinged end flaps adapted to be superimposed over said end flaps of said bottom section, and having thereon locking tongues in- V rear wall, and end walls, said overwrap'portion being integrally connected to said open receptacle along the upper edge of said front wall, and being provided with suitable transverse score lines dividing said overwrap portion into a series of sections comprising a first side section, a bottom section, a second side section, top section and a transverse fiap, said first side, bottom, and second side sections adapted to be coextensively folded over said front, bottom and rear walls respectively of said open receptacle, said top section adapted to be folded over and form the top wall of said open receptacle, said first and second side sections being provided with contiguous hinged end flaps adapted to be folded over said end walls of said open receptacle, said first side section being provided with a transverse slit, said bottom section being provided with contiguous hinged end flaps having longitudinal slits therein adapted to be superimposed over said end flaps of said first and second side sections, said top section being provided with contiguous hinged end flaps adapted to be superimposed over said end flaps of said bottom section, and having thereon locking tongues insertable in the longitudinal slits of the end flaps of said bottom section, said transverse flap of said top section adapted to be superimposed over said first side section and having thereon a locking tongue insertable in the transverse slit of said first side section.

4. The container as defined in claim 3 wherein said plastic is polyethylene.

5. A container, particularly adaptable for packaging comestibles comprising an integral open receptacle and an integral sealable overwrap portion adapted to be folded about said open receptacle, said open receptacle having as integral parts, a front wall, a bottom wall, a rear wall, and end walls, said overwrap portion being integrally connected to said open receptacle along the upper edge of said front wall, and being provided with suitable transverse score lines dividing said overwrap portion into a series of sections comprising a first side section, a bottom section, a second side section, a top section and a transverse flap, said first side, bottom, and second side sections adapted to be coextensively folded over said front, bottom and rear walls respectively of said open receptacle, said top section adapted to be folded over and form the top wall of said open receptacle, said first and second side sections being provided with contiguous hinged end fiaps adapted to be folded over said end walls of said open receptacle, said first side section being provided with a transverse slit, said bottom section being provided with contiguous hinged end fiaps having longitudinal slits therein adapted to be superimposed over said end flaps of said first and second side sections, said top section being provided with contiguous hinged end flaps adapted to be superimposed over said end flaps of said bottom section, and having thereon locking tongues insertable in the longitudinal slits of the end flaps of said bottom section, said transverse fiap of said top section adapted to be superimposed over said first side section and having thereon a locking tongue insertable in the transverse slit of said first side section, each of said locking tongues being locally sealed in said slits in such a manner that said seal is rupturable by slight force so that an initially closed and sealed container can be opened to provide initial access to the contents, and reclosed to provide protected storage for the partially depleted contents of the container.

6. A container, particularly adaptable for packaging comestibles comprising an integral open receptacle and an integral scalable overwrap portion adapted to be folded about said open receptacle, said open receptacle having as integral parts, a front wall, a bottom wall, a rear wall, and end walls, said overwrap portion being integrally connected to said open receptacle along the upper edge of said front wall, and being provided with suitable transverse score lines dividing said overwrap portion into a series of sections comprising a first side section, a bottom section, a second side section, a top section and a transverse flap, said first side, bottom, and second side sections adapted to be coextensively folded over said front, bottom and rear walls respectively of said open receptacle, said top section adapted to be folded over and form the top wall of said open receptacle, said first and second side sections being provided with contiguous hinged end flaps adapted to be folded over and sealed to said end walls of said open receptacle, said first side section being provided with a transverse slit, said bottom section being provided with contiguous hinged end flaps having longitudinal slits therein adapted to be superimposed over said end flaps of said first and second side sections, said top section being provided with contiguous hinged end flaps adapted to be superimposed over said end flaps of said bottom section, and having thereon locking tongues insertable in the longitudinal slits of the end fiaps of said bottom section, said transverse flap of said top section adapted to be superimposed over said first side section and having thereon a locking tongue insertable in the transverse slit of said first side section, each of said locking tongues being locally sealed in said slits in such a manner that said seal is rupturable by slight force so that an initially closed and sealed container can be opened to provide initial access to the contents, and reclosed to provide protected storage for the partially depleted contents of the container.

7. A container, particularly adaptable for packaging comestibles comprising an integral open receptacle, an overlay portion adapted to be bonded to the upper edges of said open receptacle and an integral scalable overwrap portion adapted to be folded about said open receptacle, said open receptacle having as integral parts, a front wall, a bottom wall, a rear wall, and end walls, said overwrap portion being integrally connected to said open receptacle along the upper edge of said front wall, and being provided with suitable transverse score lines dividing said overwrap portion into a series of sections comprising a first side section, a bottom section, a second side section, a top section and a transverse flap, said first side, bottom, and second side sections adapted to be coextensively folded over said front, bottom and rear Walls respectively of said open receptacle, said top section adapted to be folded over and form the top wall of said open receptacle,

said first and second side sections being provided with contiguous hinged end flaps adapted to be folded over said end walls of said open receptacle, said first side section being provided with a transverse slit, said bottom section being provided with contiguous hinged flaps having longitudinal slits therein adapted to be superimposed over said end flaps of said first and second side sections, said top section being provided with contiguous hinged end flaps adapted to be superimposed over said end flaps of said bottom section, and having thereon locking tongues insertable in the longitudinal slits of the end flaps of said bottom section, said transverse flap of said top section adapted to be superimposed over said first side section and having thereon a locking tongue insertable in the transverse slit of said first side section.

8. A plastic container, particularly adaptable for packaging comestibles comprising an integral open receptacle and an overlay portion adapted to be bonded to the upper edges of said open receptacle and an integral heat-scalable overwrap portion adapted to be folded about said open receptacle, said open receptacle having as integral parts a front wall, a bottom wall, a rear wall, and end walls, said overwrap portion being integrally connected to said open receptacle along the upper edge of said front wall, and being provided with suitable transverse score lines dividing said overwrap portion into a series of sections comprising a first side section, a bottom section, a second side section, a top section and a transverse flap, said first side, bottom and second side sections adapted to be co extensively folded over said front, bottom and rear walls respectively of said open receptacle, said top section adapted to be folded over and form the top wall of said open receptacle, said first and second side sections being provided with contiguous hinged end flaps adapted to be folded over said end walls of said open receptacle, said first side section being provided with a transverse slit, said bottom section being provided with contiguous hinged end flaps having longitudinal slits therein adapted to be superimposed over said end flaps of said first and second side sections, said top section being provided with contiguous hinged end flaps adapted to be superimposed over said end flaps of said bottom section, and having thereon locking tongues insertable in the longitudinal slits of the end fiaps of said bottom section, said transverse fiap of said top section adapted to be superimposed over said first side section and having thereon a locking tongue insertable in the transverse slit of said first side section, each of said locking tongues being locally heatsealed in said slits in such a manner that said heat-seal is rupturable by slight force so that an initially closed and sealed container can be opened to provide initial access to the contents, and reclosed to provide protected storage for the partially depleted contents of the container. I

9. A plastic container, particularly adaptable for packaging cornestibles comprising an integral open receptacle and an integral heat-scalable overwrap portion adapted to be folded about said open receptacle, said open receptacle having as integral parts a front wall, a bottom Wall, a rear wall, and end walls, said overwrap portion being integrally connected to said open receptacle along the upper edge of said front wall, and being provided with transverse score lines dividing said overwrap portion into a series of sections comprising a first side section, a bottom section, a second side section, a top sec tion and a transverse fiap, said first side, bottom, and second side sections adapted to be coextensively folded over said front, bottom and rear walls respectively of said open receptacle, said top section adapted to be folded over and form the top wall of said open receptacle, said first and second side sections being provided with contiguous hinged end flaps adapted to be folded over said end walls of said open receptacle, said first side section being provided with a transverse slit, said bottom section being provided with contiguous hinged end flaps adapted to be superimposed over said end flaps of said first and second side sections, said top sectionbeing provided with contiguous hinged end fiaps adapted to be superimposed over and heat-sealed to said end flaps of said bottom section, said transverse flap of said top section adapted to be superimposed over said first side section and having thereon a locking tongue insertable in the transverse slit of said first side section, said locking tongue being locally heat-sealed in said slit.

10. A plastic container particularly adaptable for packaging ccmestibles comprising an integral open receptacle, an overlay portion adapted to be bonded to the upper edges of said open receptacle and an integral heat-scalable overwrap portion adapted to be folded about said open receptacle, said open receptacle having as integral parts a .front wall, a bottom Wall, a rear wall, and end Walls, said overwrap portion being integrally connected to said open receptacle along the upper edge of said front wall, and being provided with transverse score lines dividing said overwrap portion into a series of sections comprising a first side section, a bottom section, a second side section, a top section and a transverse section, said first side, bottom and second side sections adapted to be coextensively folded over said front, bottom and rear walls respectively of said open receptacle, said top section adapted to be folded over and form the top Wall of said a open receptacle, said first and second side sections being provided with contiguous hinged end flaps adapted to be folded over said end walls of said open receptacle, said first side section being provided with a transverse slit, said bottom section being provided with contiguous hinged end flaps adapted to be superimposed over said end flaps of said first and second side sections, said top section'being provided with contiguous hinged end flaps adapted to be superimposed over and heat-sealed to said end flaps of said bottom section, transverse flap of said top section adapted to be superimposed over said first side section and having thereon a locking tongue insertable in the transverse slit of said first side section, said locking tongue being locally heat-sealed in said slit.

11. A plastic container particularly adaptable for packaging comestibles comprising an integral open receptacle and an integral heat-sealable overwrap portion adapted to be folded about said open receptacle, said open receptacle having as integral parts, a front wall, a bottom wall, a rear wall, and end walls, said overwrap portion being integrally connected to said open receptacle along the upper edge of said front Wall, and being provided with transverse score lines dividing said overwrap portion into a series of sections comprising a first side section, a bcttom section, a second side section, a top section and a transverse fiap, said first side, bottom, and second side sections adapted to be coextensively folded over said front, bottom and rear Walls respectively of said open receptacle, said top section adapted to be folded over and form the top wall of said open receptacle, said first side section being provided with a transverse slit, said second side section being provided with contiguous hinged end flaps adapted to be folded over said end walls of said open receptacle, said bottom section being provided with contiguous hinged end flaps, having longitudinal slits therein, adapted to be superimposed over said end flaps of said second side section, said top section being provided with contiguous hinged end flaps adapted to be superimposed over said end flaps of said bottom section, and having thereon locking tongues insertable in the longituidnal slits of the end flaps of said bottom section, said transverse flap of sealed top section adapted to be superimposed over said first side section and having thereon a locking tongue insertable in the transverse slit of said first side section, said transverse flap being provided with contiguous hinged end flaps adapted to be folded over and inserted between said end walls and the end flaps of said bottom section, each of said locking tongues being locally heat-sealed in said slits.

References Cited in the file of this patent UNITED STATES PATENTS 2,285,991 Lester June 9, 1942 2,646,916 Meller July 28, 1953 3,050,229 Netf Aug. 21, 1962 FOREIGN PATENTS 24,546 Great Britain of 1898 527,155 Great Britain Oct. 3, 1940 1,174,547 France Nov. 3, 1958

Claims

3. A PLASTIC CONTAINER, PARTICULARLY ADAPTED FOR PACKAGING COMESTIBLES COMPRISING AN INTEGRAL OPEN RECEPTACLE AND AN INTERGRAL SEALABLE OVERWRAP PORTION ADAPTED TO BE FOLDED ABOUT SAID OPEN RECEPTACLE, SAID OPEN RECEPTACLE HAVING AS INTEGRAL PARTS, A FRONT WALL, A BOTTOM WALL, A REAR WALL, AND END WALLS, SAID OVERWRAP PORTION BEING INTEGRALLY CONNECTED TO SAID OPEN RECEPTACLE ALONG THE UPPER EDGE OF SAID FRONT WALL, AND BEING PROVIDED WITH SUITABLE TRANSVERSE SCORE LINES DIVIDING SAID OVERWRAP PORTION INTO A SERIES OF SECTIONS COMPRISING A FIRST SIDE SECTION, A BOTTOM SECTION, A SECOND SIDE SECTION, TOP SECTION AND A TRANSVERSE FLAP, SAID FIRST SIDE, BOTTOM, AND SECOND SIDE SECTIONS ADAPTED TO BE COEXTENSIVELY FOLDED OVER SAID FRONT, BOTTOM AND REAR WALLS RESPECTIVELY OF SAID OPEN RECEPTACLE, SAID TOP SECTION ADAPTED TO BE FOLDED OVER AND FORM THE TOP WALL OF SAID OPEN RECEPTACLE, SAID FIRST AND SECOND SIDE SECTIONS BEING PROVIDED WITH CONTIGUOUS HINGED END FLAPS ADAPTED TO BE FOLDED OVER SAID END WALLS OF SAID OPEN RECEPTACLE, SAID FIRST SIDE SECTION BEING PROVIDED WITH A TRANSVERSE SLIT, SAID BOTTOM SECTION BEING PROVIDED WITH CONTIGUOUS HINGED END FLAPS HAVING LONGITUDINAL SLITS THEREIN ADAPTED TO BE SUPERIMPOSED OVER SAID END FLAPS OF SAID FIRST AND SECOND SIDE SECTIONS, SAID TOP SECTION BEING PROVIDED WITH CONTIGUOUS HINGED END FLAPS ADAPTED TO BE SUPERIMPOSED OVER SAID END FLAPS OF SAID BOTTOM SECTION, AND HAVING THEREON LOCKING TONGUES INSERTABLE IN THE LONGITUDINAL SLITS OF THE END FLAPS OF SAID BOTTOM SECTION, SAID TRANSVERSE FLAP OF SAID TOP SECTION ADAPTED TO BE SUPERIMPOSED OVER SAID FIRST SIDE SECTION AND HAVING THEREON A LOCKING TONGUE INSERTABLE IN THE TRANSVERSE SLIT OF SAID FIRST SIDE SECTION.