US2474523A - Triple-edge reclosing carton - Google Patents

Description

R. GUYER TRIPLE-EDGE RECLOSING4 CARTON `lune 28, 1949.

2 Sheets-Sheet 1 Filed June 16, 1945 gmc/VMM Reyna/ds zzyer Patented June'28, 1949 UNITED STATES PATENT OFFICE s TRIPLE-EDGE REoLosrNG cAn'ro Reynolds Guyer, St. Paul, Minn., asslgnor to Waldorf Paper Products Company, St. Paul, Minn., a corporation of Minnesota Application June 16, 1945, Serial No. 599,197

3 Claims. (Cl. 229-43) sirable to employ a carton having a. telescoping top. Such cartons, however, are usually costly to manufacture as the top and carton body must be formed byseparate operations. Patents have been issued on cartons constructed to be cut off near one end of the tubular body so that the cut-o end may be used as a telescoping closure.

Such cartons have the disadvantage of requiring excessive space since the upper portion thereof can not be lled without danger `of spilling the contents when the top is cut off. Telescoping containers of the usual ltype require special equipment for the closing operation and are therefore less convenient to use than the usual glued end type of tubular carton. Telescoping containers are also often disadvantageous as they must be shipped in set-up form.

It is the object of the present invention to provide a tubular carton having a triple thickness edge at one end of the body. The carton bodyv is glued in tubular form while flat and m'ay be shipped in this collapsed form. When desired for use this carton may be filled and sealed in the usual manner and on the usual apparatus, thus requiring no special equipment and no extra operations.

A further feature of the present invention resides in folding the carton stock back upon itself at one end and folding the closure flap hearing edge outwardly again to form a triple thickness edge of stock. Adhesive may be applied between the carton wall and the folded `flange so that this fiange remains permanently attached to overlie the outer surface of the carton Walls at one end thereof. The stock is preferably perfcrated betweenthis glued age and the outwardly turned flap bearing 4edge so that this flap supporting edge andthe flaps supported thereby may .serve as a removable closure when the perforations have been broken.

A-further feature of the present invention lies in the provision of a double glue flap, one portion of which extendsfrom one end of the blank and the other portion of'which extends from the other end of the blank. One glue flap serves to connect the walls of the carton in tubular relation. The other glue flap serves to connect the closure flap suporting edge of the blank in tubular relation. Thus both the walls of the carton blank and the rectangular walls of the closure are connected together.

As the carton is formed of a single piece of stock and is folded to provide an edge of triple thickness, provisions must be made to `prevent the splitting of the outer thickness of stock when the carton ,blank is folded. The outer laminationl of stock is the same length between creases as the innermost lamination. Therefore as the carton is folded the outer laminator would normally tend to split at the corners. Not only would such splitting ofthe exposed corners de'- tract from the appearance of the carton, but also as a result the corners of the depending walls of the telescoping closure would be disconnected. In order to obviatev this dimculty I increase the width of the score line at the creases in the outermost layer of stock. As a result the paper stock of the innermostA lamination is free to crowd together and bulge inwardly at the upper extremity of the wall so vthat the stock forming the outer lamination will not split when folded. These and other objects and novel features of my invention willbel more clearly and fully set forth in the following specication and claims.

In the drawings forming apart of my specification:

Figure l is a perspective view of my carton with one end thereof in unsealed condition.

Figure 2 is a perspective view of the carton inv Figure 8 is a diagrammatic view of the. blank from which the carton is formed.

The carton' Aincludes wall panels lil, H, I2,

andv I3 connected by -parallel foldlines Il, I5, and

it. A glue nap Il is connected to the panel l0 described fold lines.

to the panels I 3, ll, I2, and t3 respectively, along the fold line 2B. The panel 2l is separated from the panel 22 by the slit or slot v25. A similar slit or slot 2t separates the panels 22 and 23. A slot 21 separates the panels 23 and 24. The slits or slots 25, 23 and 21 are provided at the corners of the finished carton so as to eliminate one thickness of stock at the corners.

The flap bearing edge which forms the depending side walls or skirt on theremovable closure is connected to the panels 2l, 22, 23, and 24 along the perforated line 29. The perforated line may comprise continuous perforations, may be partially cut and partially perforated, or may be cut scored to provide a weakened line of separation. The flap Supporting edge includes panels 3d, 3l, 32, and 33 which are connected to the panels 2l, 22, 23, and 24 respectively. The panels 38 and 3I-are connected by a fold line 34 which is in eiect a continuation of the fold line id. A similar fold line 35 forming a continuation of the' fold line I 5 connects panels 3i and 32. A third fold line 35 which is aligned with the fold line I connects panels 32 and 33. A glue flap 31 is connected to the panel 33 along the fold line 33.

Connected to the panels 30, 3 I, 32, 'and 33 along the fold line 4G, I provide closing aps 4I, 42, 43. and 44, respectively. These closing flaps are designed to fold into overlying relationship with the flaps 4I and 43 lowermost and in opposed coplaner relationship and the flaps 42 and 44 folded thereover and secured thereto.

At the lower end of the carton I provide closing flaps 45, 45, fl1 and 49 which are connected to the panels I0, il, I2, and I3 along the fold line 50. These closing iiaps form a closure similar to that described at the top of the carton, the flaps 45 and 41 being folded into coplaner relationship and adhered to the flaps 46 and 49.

In order that the carton stock may compress together at the corners and bulge inwardly of the carton an amount suflicient to prevent splitting of the flap bearing edge I provide wide creases 5I, 52, 53, and 54 at the upper extremity of the fold lines I9, I4, I5, and I6, respectively. These enlarged creases lie inwardly of the flap bearing edge of the carton in folded form thereof so that as the carton folds the stock forming the wall panels I0, Il, I2, and I3 may bulge inwardly to prevent splitting of the outer lamination of stock. Even when relatively thin stock is used to form the carton the three thicknesses of material at the upper edge thereof tend to split the edge ofthe container as illustrated in Figures 6 and 1 ofthe drawings. When folded along both lines 20 and 29 the carton is ready for gluing into tubular form.

The carton blank is next folded for gluing the same into tubular form. This is preferably ac complished by folding the blank along the fold line Id and then along the fold line I5. Figure 6 shows this step of the operation, although in ac- 'tual practice the glue flap I1 is adhered to the panel i3 when the blank is in fiat form with the panels l@ and I3 overlying the panels II and I2. Simultaneously with the attachment of the glue flap l1 to the panel I3, the glue flap 31 is adhered to the outer surface of the panel 33. Thus both the walls of the inner container and the depending walls of the removable closure are secured together. The carton blanks remain in flat folded form until desired for use. They are then set up by sealing either the upper or lower end, filling the carton, and folding and closing the end flaps on the other end of the carton. Thus no unusual apparatus is required during the folding and sealing operation and the reverse folding of the carton blank in the formation thereof may be accomplished without special equipment.

After the carton has been sealed it has the appearance of Figures 2 and 3 of the drawings. The upper edge of the carton is double providing a rounded appearance. When it is desired to remove the contents of the-carton the cover is detached from the base along the perforated line 29, whereupon the cover may be removed as best illustrated in Figure 4 of the drawings. After removing a part of the contents the cover may be reinserted onto the bottom portion of the carton if desired.

ItV should be noted that the increase in the size of the fold line inwardly of the flap bearing edge of the carton allows the material to bulge inwardly more than usual at the corners of the carton, thus allowing a restriction in the size of the carton at the top and preventing the corners of the outer lamination of stock from splitting. In finished form the walls depending ufrom the removable closure are of but slightly greater periphery than the remainder of the walls of the carton due to the inward compression of the upper portion ofthe carton. It is true that the outer lamination of stock will stretch slightly, but any considerable stretching is rendered unnecessary by the inward bulge of the carton corners.

In accordance with the patent statutes, I have described the principles of construction and corners of the outer lamination without such a lline 29. This produces a, cartonblank having three thicknesses of carton stock at the upper -rst panels, a series of second panels integrally connected to said first panels along a weakened line of separation and folded to overlie said first panels, and closure flaps secured to said second panels.

l2. A carton blank comprising a series of side l wall panels and a glue iiap connected along substantially parallel score lines, the glue flap projecting from one end of the blank, a series of l 2,414,5as

panels and projecting from the end of the blank l0 opposite that from which the rst named glue flap projects, and closure flap means foldably connected along a common line of fold to said cover edge panels and foldable to form a carton closure. A

3. A carton comprising a series of side wall panels connected along substantially parallel score lines, means connecting said wall panels in tubular relation, the upper ends of said core lines being of magnied width, a series of ange 20 Number panels connected to the upper edges of said wall A panels and folded to overlle, and be secured to, the outer surfaces of said wall panels between said score line ends of magnified width, means securing said llange panels in surfacel contacting 25 relation to the portions of the side wall panels which they overlie, a series of cover edge panels foldabiy connected together and connected to said ange panels along weakened lines of separation, said cover edge panels overlying the ange panels, means connecting said cover edge panels in tubular relation, closure aps foldably connected to said cover edge panels and secured together to form a top closure, said cover edge panels and closure aps forming a telescoping 'removable carton top, said weakened lines of separation forming the sole connection between the removable carton top and the remainder of the body. A

REYNOLDS GUYER.

'I REFERENCES CITED The following referenlces are of record in the le of this patent:

UNITED STATES PATENTS Name Date 1,119,208 Weiss Dec. 1. 1914 1,132,292 Weiss Mar. 16, 1915 1,146,115 Weiss July 13, 1915 1,473,432 Huye Nov. 6, 1923 2,178,967 Market Nov. '1, 1939 2,179,555 Kelis Nov. 14, 1939 2,220,388 Beaman et al. Nov. 5, 1949

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