US2939625A

US2939625A - Container with locking closure

Info

Publication number: US2939625A
Application number: US685124A
Authority: US
Inventors: Leonard W Snyder
Original assignee: Container Corp
Current assignee: Container Corp; Smurfit Kappa Packaging Corp
Priority date: 1957-09-20
Filing date: 1957-09-20
Publication date: 1960-06-07
Anticipated expiration: 1977-06-07

Description

June 7, 1960 L. wfsNYDER CONTAINER wrm LOCKING CLOSURE Filed Sept. 20, 1957 Ill/11111111111001 "Ill/1111111111 wmnmm."115755537 )0 g 3 f a; 2 /VV) K 9 44v. a n. a Mai; a; Il w 2. 8% MN 2 w 4\ g a 7. w; M; a z mil? A i m Q M 2 176 0 4 [22 were 502' afeonazul zzyaler .9 Wu

United States Patent 2,939,625 7 CONTAINER WITH LOCKING CLOSURE Leonard W. Snyder, Mount Prospect, 11]., assignor to Container Corporation of America, Chicago, Ill., a corporation of Delaware Filed Sept. 20, 19 57, Ser.No. 685,124

3 Claims. or. 229- 45 The present invention relates to containers and more particularly to shipping containers constructed of relatively heavy fibre board and having closure means adapted to be secured releasably in closed position.

r 2,939,625 Patented June7, 1960 the covers may be releasably held in closed position and Among the principal objects of the invention are to provide a rugged construction of container having efiective reinforced portions combined with one or more closure members, with means cooperating with the reinforced portions and other parts of the container whereby the closure edges may be supported in closed position and at the same time the closure edges will be locked releasably in such closed position.

Another object of the invention is to provide, in

shipping container having hinged cover sections, an end wall construction reinforcedto afford a large measure of support for the edges of the cover sections adjacent the end wall and to provide inwardly extended locking parts against which cooperating locking parts on the cover sections are adapted to beartoprovide an effective, releasable cover lock.

A further object of the invention is to provide a generally improved container with reinforced end structure and cover structure combined with releasable cover locking means. Additional and more specific objects and advantages of the present invention will become apparent as the description proceeds.

In the drawings:

Fig. 1 is a perspective view of a container'embodying the principles of the present invention; i

Fig. 2 is a plan view of a preferred form of solid fibreboard blank from which the container of the present invention may be formed;

Fig. 3 is a fragmentary cross-sectional view taken along line 3-3 of Fig. 1 looking in the direction of the arrows; and I Fig. 4 is a fragmentary sectional view takenalong line 44 of Fig. 3. I

. The present invention as herein disclosed comprises a container of the general type employedrfor shipmentof bottled beverages. The container may be ofsomewhat elongated, rectangular form ,to comprise interconnected side and end walls with cover panels hingedly carried by the side walls and arranged to swing toward'each other to closed position. The end ,Walls'include supporting members having upwardly presented abutment surfaces upon which the ends of the cover panels may rest when closed. Releasable cover-locking means are provided comprising partsprojecting inwardly and extending along the upper edges of the end wallsgand coopcrating locking portions on the cover panelsextending outwardly to engage frictionally the parts on the end walls when the covers are moved from open to closed position. The locking portionson the. cover in passing the inwardly projecting parts on the end walls createga small degree of flexing of the coversand end walls to permit passage of the'locking parts without substantial deformation of the contacting parts with the result that and end wall panel sections.

may be repeatedly moved from closed to open position as desired without detriment to the locking parts.

Referring particularly to the drawings, the container is preferably, although notnecessarily, formed-from a single blank 10 of foldable fibre board of substantial thickness. This blank is suitably cut, slotted and creasescored to provide

side walls

11 and 12,

end walls

13 and 14,

bottom flaps

15, 15 on the side walls. 11 and 12,

bottom flaps

16, 16 on the

end walls

13 and 14, and

cover panels

17, 17 on the upper edges of the

side walls

11 and 12. Score lines 19 and 20, extending lengthwise ofthe blank, define the cover panels from the side walls; and define the bottom flaps from the side and end walls.

Score lines

21, 22 and 23 separate the side An attaching flap 24 may be employed, hinged on panel 13 along score line 25. The container may besecured in flat, collapsed tubular form by joining the fiap 24 to side wall 12. 1 The

end walls

13 and 14 are preferably formed with

finger openings

28, 28 to facilitate carrying the filled container. Means are provided for supplying additional bearing surfaces for engagement by the fingers in carrying the container and also providing reinforcement for the end walls and bearing surfaces for the ends of the cover panels. For this purpose extensions, indicated as a whole at 30, 30 are formed on the upper edges of from the end walls by the score line 19.. Each extension 30 in the present instance is suitably cut along lines 31, 32,133 and 34 to provide

narrow panel sections

35, 36, 37, 38 and 39. The cuts are preferably interrupted by small nicks which hold'the sections together while the extensions 30 remain in fiat form. However, when the sections are folded together, the nicks, while assisting in folding the sections accurately, tend to break when adjoining sections are folded one against the other. Thus the sections, when so folded, tend to lie flat against eachother, 'as best shown in Fig. 3. For the purpose of eliminating square edges where the fingers engage the folded sections, the cuts preferably do not extend entirely across the extension 30 betweensections 35 and 36

' andbetween sections

37 and 38. At a central locationbetweeri the sections just referred to, and indicated at 40 and 41,:the cuts are interrupted over a length somewhat less than the length of the, finger opening and crease scores are impressed in alignment with the cuts.

Sections

36 and 37 in the present instance are of approximately the same width but section 38 is preferably formed somewhat wider than the sections '36 and 37 so that whenthe section 38 is folded against section 37 and section 39 is folded against section 38, as shown in Figs. 1 and 3, the upper edges of

sections

38 and 39 will project somewhat above the upper edges of sections 36.;and 37. Section 39 maybe formed narrower than its adjoining section 38 as it is unnecessary that it be rfnade to extend down even with'the finger engaging suraces.

For a purpose to be made clear later in the description, an elongated slot 34A is formed symmetrically with the out line 34 so that when

sections

38 and 39 are folded together the slot 34A will take the form of a notch 10- catedcentrally of these sections. The bottom of the notch is'substantially fiush with the upper edges of the

sections

36 and 37. Y

The coveripanels 17 are each preferably provided with a supplemental panel '42 defined from panel 17 by a crea'sescore 43. Thepanel 42 folded to lie against the under. surface of the cover and is secured thereto by anysuitablemeans such as adhesive.

Means are provided'for releasably locking theicover;

prises a locking tab element 44 at each end of each cover panel adapted to cooperate with inwardly projecting rib portions extending along the upper edge of the end walls. While the locking tab elements may be located in different positions they are preferably formed on the

sup pler'nentalpanels

42, 42 near the'outer longitudinal edge of the cover. In order to form inwardly projecting portions on the end Walls the crease score 19 is formed as a wide score which is customary in scoring relatively thick solid fibreboard container blanks. The fold is so formed that a bulge is provided at the juncture of the panel 35 and end wall panel and preferably the folding will be so controlled that a substantial portion of the bulge will be directed inward. Y

The distance between the opposite edges of

adjacent locking tabs

44, 44 is less than the length of the slots 34A so that when the covers are closed the two

adjacent tabs

44, 44 at each end of the container will be received into thenotches formed by the slots 34A.

The section 35 is wider than the

adjoining sections

36 and 37 so that the upwardly presented bearing surface provided by the latter sections will be spaced from the inwardly projecting part or rib, indicated at 46, a sufficient distance to accommodate the thickness of the

locking tabs

44, 44 and also to keep the edges of

sections

36 and 37 from crowding against the inward bulge of the rib 46. Apart from the tabs 44 the cover end portions will come to rest upon the upper edges of the

sections

38 and 39 which thus form upwardly presented abutmerits.

As illustrated in Fig. 4, the portions of the covers adjacent the tabs 44 may be somewhat downwardly de fiected when the covers are in their closed and locked position. of tabs 44 meet the rounded rib 46 and by a combination of effects the tabs pass around the rib and move below it. Some deflection may take place in the end wall and some in the covers themselves dependent upon the particular resiliency of the fibreboard from'which the container is formed.

In order to make the relationships of the cover locking parts more readily apparent, the construction, as shown in Figs. 3 and 4, is somewhat exaggerated. In practice the major parts of the cover edge portions when closed are substantially aligned with the upper edges of the end walls. 7

Registering

finger openings

47 and 48 are cut'in each cover and supplemental cover panel to facilitate upward swinging of the covers from their closed position.

After the blanks have beencut and scored the supplemental cover panels are glued or otherwise secured in place, the panel sections 35 to 39 inclusive are adhesively secured and sections 35 are preferably adhesively secured to their attached end walls 13 and 14-. The attaching flap 24 is then secured to the side wall 12 and the container may then be retained in collapsed tubular form until ready for use.

When it is desired to set up the container from its collapsed condition the side and end walls aresquared up, the bottom flaps are folded over and secured together and the container is ready to receive its contents. After filling the container with such commodities as bottled beverages the cover panels are closed and, by reason of the locking tabs engaging beneath the inwardly projecting rib portions on the end walls, the cover panels will be releasably locked in closed position. Due to the reinforcement of the end walls provided by the sections 35 to 39, inclusive, secured together and to the'inside' surfaces of the end walls, the latter will offer great resistance to bending and the ends'of the covers will be strongly supported, enabling the containers to be stacked'in relatively high tiers without danger of undue distortion. The meetingedge portions of the covers when closed are supported on the top edges of sections'36, 37, 38 and 39 due to contact of these sections by the rigid locking As the covers are swung downward the ends tabs 44. The remaining edge portions of the cover edges are supported upon the upper edges of the sections 3?: and 35!. The folded sections-35 to 39 also provide comfortable bearing surfaces for the fingers of the person carrying the container.

It is to be noted that the blank is substantially rectangular in contour and utilization is made of the greater portion of the stock with only a small amount of waste.

While the present description sets forth a preferred embodiment of the invention, various changes may be made in the construction without departing from the spirit of the invention, and it is thereforerdesired that the present embodiment be considered in all respects as illustrative and not restrictive, reference being had to the appended claims rather than tothe foregoing description to indicate the scope of the invention.

I claim:

1. A fibreboard container of rectangular form having interconnected side and end walls, cover panels hinged on the top edges of the side walls and adapted to meet along an intermediate line to close the top of the container, a reinforcing member on the inner surface of an end wall, spaced below the uper edge thereof and providing an upwardly presented abutment surface adapted to be contacted by the edge portions of the cover panels to support such edge portions slightly below the top edge of the end wall, said end wall comprising a double thickness of fibreboard adjacent-said reinforcing member formed by reverse bending along a fold line to define the top edge of the end wall, such fold presenting an inwardly projecting curved rib portion on the inner surface of the end wall, the closure panels each'having a locking portion on their end edges projecting toward the end wall, said locking portions being adapted to move frictionally past the inwardlyprojecting rib at the top of the end Wall when the cover panels are closed, whereby the cover panels may be held releasably in closed position.

2. A container construction, as defined in claim 1, in which the covers have supplemental panels on their ad jacent free edges, reversely folded and secured to the under sideof their attached covers, and the locking portions on the, cover comprising short rigid tabs projecting from the edges of the supplemental panels.

3. A fibreboard container of rectangular form having interconnnected side and end walls, cover panels hinged on the top edges of theside wallsand adapted to extend inwardly to close the container, an abutment member on the inner surface of an end wall, spaced below the upper edge thereof and having an upwardly presented bearing surface adapted to be contacted by theedge portions of the cover panels to support such edge portions in closed position, an inwardly projecting, curved rib portion extending along the upper edge of the end wall, the closure panels eachhaving' a supplemental panel secured to its under surface, each supplemental panel having a locking portionprojecting toward the end wall, said locking portions being adapted to engage frictionally against the inwardly-projecting'rib at the top-of the end wall when the cover panels are moved past the rib to their closed positions, said abutment member having a cutout in its upper part extendingdownward'to a depth substantially equal to the: thickness of the locking portions and adapted to receive the locl'cing portions in positions so that their upper surfaces are engaged beneath the inwardly extending rib on the upper edge of the end wall, and thereby hold the cover panels releasably in closed position.

ReferencesCited in the file of this patent V UNITED STATES PATENTS 7 Ferguson Feb. 19,1952