Reusable, collapsible shipping container
A primary object of this invention is to provide a novel container which includes transversely hinged end and side panels, top and bottom flaps longitudinally hinged to the end and side panels, the bottom flaps of the side panels each has a longitudinal hinge line dividing each bottom flap into first and second portions, the bottom flaps of the side panels are secured to each other thereby providing a bottom panel which has a generally centrally located longitudinal hinge line, and the end panels and their respective top and bottom flaps each have a generally centrally located transverse hinge line whereby inwardly folding of the transverse hinge lines of the end panels simultaneously with outboard folding of the longitudinal hinge line of the bottom panel allows the container to move from a set-up to a collapsed condition. 
     Another object of this invention is to provide a container of the type set forth wherein the overlapping of the first and second portions of one bottom flap of one of the side panels relative to the second and first flap portions of the other of the second bottom flaps of the second side panel respectively thereby providing a strong longitudinal hinge line which enables the container to be repeatedly reused. 
     Yet another object of the invention is the construction of the bottom flaps of the end panels which provide locking with the side panels when the container is moved to the set-up condition. 
     Still another object of the invention is the provision of a cut line carried by one of the top flaps of the side panels for receiving a portion of the other top flap of another side panel when the top flaps are moved to a closed position. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a top plan view of a container blank constructed in accordance with this invention, and illustrates longitudinal and transverse hinge lines for allowing collapsing and setting up of a container formed from the blank. 
     FIG. 2 is a perspective view of a partially formed container, and illustrates the container lying on a side panel prior to completed assembly. 
     FIG. 3 is a perspective view similar to FIG. 2, and illustrates the container in a partially collapsed condition. 
     FIG. 4 is a perspective view of the fully assembled container blank of FIG. 1, and illustrates the container in a fully collapsed condition. 
     FIG. 5 is a perspective view with a portion broken away for clarity, and illustrates the container resting on its bottom panel in a partially set-up condition. 
     FIG. 6 is a fragmentary enlarged perspective side view, and illustrates in more detail the assembled bottom panel of the collapsed container of FIG. 4. 
     FIG. 7 is a sectional view taken generally along line 7--7 of FIG. 5, and illustrates the partially set-up container. 
     FIG. 8 is a sectional view taken generally along line 8--8 of FIG. 5, and illustrates the partially set-up container. 
    
    
     A novel container constructed in accordance with the present invention is fully illustrated in FIGS. 2 through 5 of the drawings, and is generally designated by the reference numeral 10. The container 10 is preferably constructed from corrugated board or similar paper stock material by appropriately forming a container blank 11 which is fully illustrated in FIG. 1 of the drawings. 
     The container blank 11 is formed by a pair of generally parallel, spaced longitudinal edges 12, 14, and a pair of generally parallel, spaced transverse edges 15, 16. 
     The container blank 11 includes a pair of generally parallel, spaced longitudinal hinge or fold lines 17, 18, and generally parallel, spaced transverse hinge or fold lines 19, 20, 21, 22. 
     A first end panel 24 is defined by a portion of the longitudinal hinge line 17, a portion of the longitudinal hinge line 18, a portion of the transverse edge 15 and the transverse hinge line 19 whereby the first end panel 24 is transversely hinged to a first side panel 25. 
     The first side panel 25 is defined by a portion of the longitudinal hinge line 17, a portion of the longitudinal hinge line 18, and the transverse hinge lines 19, 20 whereby the transverse hinge line 20 hingedly secures the first side panel 25 to a second end panel 26. 
     The second end panel 26 is defined by a portion of the longitudinal hinge line 17, a portion of the longitudinal hinge line 18, and the transverse hinge line 20, 21 whereby the transverse hinge line 21 hingedly secures the second end panel 26 to a second side panel 27. 
     The second side panel 27 is defined by a portion of the longitudinal hinge line 17, a portion of the longitudinal hinge line 18, and the transverse hinge lines 21, 22 whereby the transverse hinge line 22 hingedly secures the second side panel 27 to a tab 28. 
     A tab 28 is defined by a portion of the transverse edge 16, and the transverse hinge line 22. The tab 28 is adapted to be adhesively secured to a portion of the first end panel 24 when the container blank 11 is partially assembled (FIG. 2) to form a body portion 23. The body portion 23 includes the panels 24, 25, 26, 27 and tab 28 wherein the panels 24, 25, 26, 27 each have a top end (unnumbered) and a bottom end (unnumbered). 
     The container blank 11 further includes a top flap 29 defined by a portion of the transverse edge 15, a transverse cut line or slot 30, a longitudinal edge 31, and a portion of the longitudinal hinge line 17 whereby the top flap 29 is longitudinally hinged to the first end panel 24. 
     A top flap 32 is defined by the transverse cut line or slot 30, a transverse cut line or slot 34, a longitudinal edge 35, and a portion of the longitudinal hinge line 17 whereby the top flap 32 is longitudinally hinged to the first side panel 25. 
     A top flap 36 is defined by the transverse cut line or slot 34, a transverse cut line or slot 37, a longitudinal edge 38, and a portion of the longitudinal hinge line 17 whereby the top flap 36 is longitudinally hinged to the second end panel 26. 
     A top flap 39 is defined by the transverse cut line or slot 37, a portion of the transverse edge 16, a longitudinal edge 40, and a portion of the longitudinal hinge line 17 whereby the top flap 39 is longitudinally hinged to the second side panel 27. 
     The top flap 39 has a generally transverse cut line or slot 41 that extends generally normal from the longitudinal edge 40 toward a portion of the longitudinal hinge line 17. The transverse cut line or slot 41 is adapted to receive a portion of the top flap 36 when the container 10 is set-up and its top flaps 29, 32, 36, 39 are closed whereby the top flaps 32, 39 interlock. 
     The container blank 11 further includes a bottom flap 42 defined by a portion of the transverse edge 15, a transverse cut line or slot 44, a longitudinal edge 45, and a portion of the longitudinal hinge line 18 whereby the bottom flap 42 is longitudinally hinged to the first end panel 24. The bottom flap 42 has a longitudinal hinge or fold line 46 which divides the bottom flap 42 into a first portion 47 and a second portion 48. 
     A bottom flap 49 is defined by the transverse cut line or slot 44, a transverse cut line or slot 50, a longitudinal edge 51, and a portion of the longitudinal hinge line 18 whereby the bottom flap 49 is longitudinally hinged to the first side panel 25. The bottom flap 49 has a longitudinal hinge or fold line 52 lying in general alignment with the longitudinal hinge or fold line 46 wherein the longitudinal hinge or fold line 52 divides the bottom flap 49 into a first portion 54 and a second portion 55. 
     A bottom flap 56 is defined by the transverse but line or slot 50, a transverse cut line or slot 57, a longitudinal edge 58, and a portion of the longitudinal hinge line 18 whereby the bottom flap 56 is longitudinally hinged to the second end panel 26. The bottom flap 56 has a longitudinal hinge or fold line 59 lying in general alignment with the longitudinal hinge or fold line 46 wherein the longitudinal hinge or fold line 59 divides the bottom flap 56 into a first portion 60 and a second portion 61. 
     A bottom flap 62 is defined by the transverse cut line or slot 57, a portion of the transverse edge 16, a longitudinal edge 64, and a portion of the longitudinal hinge line 18 whereby the bottom flap 62 is longitudinally hinged to the second side panel 27. The bottom flap 62 has a longitudinal hinge or fold line 65 lying in general alignment with the transverse hinge or fold line 46 wherein the longitudinal hinge or fold line 65 divides the bottom flap 62 into a first portion 66 and a second portion 67. 
     The first end panel 24 and its respective flaps 29, 42 have a generally centrally located transverse hinge or fold line 68. The second end panel 26 and its respective flaps 36, 56 have a generally centrally located transverse hinge or fold line 69. The transverse hinge or fold lines 68, 69 provide inward movement of their respective first and second end panels 24, 26 and flaps 29, 42 and 36, 56 when the container 10 is moved from a set-up condition to a collapsed condition, as shown in FIGS. 5 and 4, respectively. 
     The container blank 11 is assembled to form the container 10 by folding the first and second end panels 24, 26 generally normal to the first side panel 25, folding the second side panel 27 generally parallel to the first side panel 25, and adhesively or otherwise securing the tab 28 to an inboard portion of the first end panel 24, as shown in FIG. 2. The bottom flaps 42, 56 are folded inboard and generally parallel to their respective first and second end panels 24, 26 as is illustrated in FIG. 2. The first and second end panels 24, 26 and their respective top and bottom flaps 29, 42, 36, 56 are folded inwardly along their respective transverse hinge or fold lines 68, 69 whereby the container 10 is placed in a collapsed condition as is illustrated in FIG. 3. The bottom flap 62 is folded along its longitudinal hinge or fold line 65. The first portion 66 of the bottom flap 62 is secured by adhesive 70 to the second portion 55 of the bottom flap 49 whereby the longitudinal hinge or fold line 65 is placed in general alignment with the longitudinal hinge or fold line 52. The first portion 54 of the bottom flap 49 is secured by adhesive 70 to the second portion 67 of the bottom flap 62 forming a bottom panel 71, as is illustrated in FIG. 6, thus completing the assembling of the container 10 (FIG. 4). 
     The container 10 can be readily set-up from the collapsed position (FIG. 4) to a set-up position (FIG. 5) by exerting a generally outward force from within the container 10 on the transverse hinge or fold lines 68, 69 whereby the first and second end panels 24, 26 are positioned generally normal to the first and second side panels 25, 27, and the bottom panel 71 is automatically positioned generally normal to the first and second end and side panels 24, 25, 26, 27, as is illustrated generally in FIGS. 7 and 8. The bottom flaps 42, 56 are moved to a position generally parallel to the bottom panel 71 thereby allowing the container 10 to remain in the set-up condition, as is illustrated in FIG. 8.