US2316261A

US2316261A - Folding box

Info

Publication number: US2316261A
Application number: US374141A
Authority: US
Inventors: Levkoff David
Original assignee: Individual
Current assignee: Individual
Priority date: 1941-01-13
Filing date: 1941-01-13
Publication date: 1943-04-13
Anticipated expiration: 1960-04-13

Description

April-13;- 1943. D. LEVKOFF\ 2,316,261

FOLDING BOX K Filed Jan. 15, 1941 2 Sheets-Sheet 1 24 W0 LEV/KOF/ INVENTOR D. LEVKOFF 2,316,261

FOLDING BOX I Fi1 ed Jan. 1 1941 2 sheetsrsheet 2 Y 04 W0 Afwror/i INVENTQR Patented Apr. 13, 1943 UNITED STATES PATENT OFFICE 2 Claims.

This invention relates to improvements in folding boxes.

The primary object of the invention resides in a cardboard box which may be collapsed into a fiat condition for compact storing and shipping, and which may be expeditiously set up for use as the occasion arises.

Another feature of the invention resides in a folding cardboard box which may be instantly erected from a flat folded collapsed position by grasping the end walls of the box and swinging them to their vertical upstanding position, whereupon the other walls of the box are drawn into and automatically locked in their related positions.

Another feature of the invention is the provision of a collapsible box having the above features which is constructed from a single blank of cardboard which is cut, scored, folded, and metal stitched in a novel manner to make the same simple and inexpensive of manufacture, and rigid when set up for use.

Other features of the invention will become apparent as the following specification is read in conjunction with the accompanying drawings, in which:

Figure l is a plan view of the blank from which the box is constructed.

Figure 2 is a top plan view of the box in collapsed position with the cover extended.

Figure 3 is a perspective view of the box in collapsed position with the cover folded over the flattened body portion of the box.

Figure 4 is a perspective View of the box set up for use with the cover open.

Figure 5 is a horizontal sectional view on the line 5-5 of Figure 4.

Figure 6 is a fragmentary Vertical longitudinal sectional view on the line 6-6 of Figure 4, with the cover in closed position.

Figure 7 is a vertical transverse sectional view on the line 1-! of Figure 4, with the cover in closed position.

Referring to the drawings by reference characters the numeral l0 designates a blank of cardboard from which my improved folding box is constructed. The blank I9 is cut and scored to provide a bottom wall H, separated from the front wall l2 by a longitudinal fold line [3, and a rear wall It which is separated from the bot-. tom wall by a longitudinal fold line l5. Transverse fold lines Iii-l6 separate the ends of the bottom wall H from like end walls 11-, and extending beyond the end walls l'l-il and foldable on the fold lines l8-l8 are inwardly fold able flaps l3-l9 having round corner edges. The front wall l2 has a longitudinal flap 20 formed integral therewith and which is provided with round corner edges and is adapted to be folded inwardly on the longitudinal fold line 2|.

Rear corner webs 22-22 are provided at onposite ends of the rear wall. It and are folded inwardly on the fold lines 23-23, which are disposed in alinement and form a continuation of the transverse fold lines Iii-l6. The rear corner webs 22-22 are integral with the rear ends of the end walls I'l-l'l along the fold lines 24-23, which fold lines are continuations of the fold line 15. Each corner web 22 is divided by a diagonal fold line 25 into a pair of like triangular

shaped web sections

26 and 21, which sections fold upon themselves when the box is in a set up position for use. The diagonal fold lines 25 extend from the rear corners of the bottom wall H to the respective diagonally opposite corners of the webs. Formed integral with each web section 23 is an elongated pocket flap 28 having an attaching portion or tab 29 extending beyond the free side edge of the web 22 of the blank iii. The flaps 23-28 have their inner free corners rounded and are inwardly foldable on the respective fold lines 30-30.

Formed integral with the front ends of the end walls ll-ll are front corner webs 3l-3I which fold inwardly on fold lines 32-32 which are coextensive with the longitudinal fold line l3. The front corner webs 3l-3l are free of the front wall l2 and each web has its inner edge 33 cut at an angle with respect to the opposite outer edge, which outer edge is in alinement with the outer edge of the rear corner web 22, and

fold line l8. Each front corner web 3| is divided by a diagonal fold line 34 into a triangular shaped web section 35 and a four sided attaching section 36. The fold line 34 extends from the front corner edge of the bottom wall II to the outer side edge of the corner web 3|, but short of the free end thereof, whereby a portion of the attaching section 36 will extend beyond the sides of the triangular web section 35 when the corner web 3! is folded on the diagonal fold line 34.

Formed integral with the top of the rear wall it along the longitudinal fold line 31 is a cover 33 having a front flap 39 foldable on the longitudinal fold line 40.

After the blank It has been out and scored in the manner hereinbefore explained, it is partially folded and stitched in a novel manner now to be explained and as clearly illustrated in Figure 2 of the drawings.

Assume that the blank l3 shown in Figure 1 has its inner side face up. The first step is to fold the front corner web flaps 3l-3l on the lines 34-34. To accomplish this, the attaching web sections 36-36 are folded upwardly and over the section 35-35, after which the end walls Il-ll and rear corner webs 22-22 are folded inwardly on the fold lines iii-l6 and 23-23. This operation causes the attaching sections 36-36 of the front webs to lie fiat against the front wall l2 and to extend inwardly beyond the edges of the triangular web fold sections 35-35. The flaps 28-28 are folded inwardly over the respective corner webs 22-22, whereupon the attaching portions 29-29 extend inwardly beyond the inner side edges of the webs 22-22. The flap 20 is folded inwardly over the folded front corner webs 3i, and the blank is now folded in position to be stitched and metal staples or stitching 4i passes through the extension portions 29 f the flaps 28 and through the rear walls i l, and similar staples or stitching 52 passes through the flap and the attaching sections 38-36 of the front corner webs Ell-3|.

To unfold the blank from the position shown in Figure 2, it is only necessary for an operator to grasp the flaps l9-l 9 and/or end walls lT-l? and pull outwardly thereon which causes the end walls to move to vertical position. As the end walls l'l-ll are swung outwardly, the rear corner webs 22-22 fold on the diagonal fold lines whereas the front corner webs 3l-3i unfold on the fold lines 34. The rear pocket flaps 28 and the front pocket flap 2D flex outwardly as the corner webs move to their opening position and when the corner webs reach their final position, the folded sections 21-21 are received beneath the pocket flaps 23-28 and the front corner webs 22-22 unfold and engage beneath the front corner flap 20 as best illustrated in Figure 5 of the drawings. With the corner webs locked beneath the

flaps

23 and 23, the box assumes the set up position shown in Figure 4. The side flaps 19-!!! may now be folded inwardly, and when it is desired to close the body of the box, the cover 38 is swung down and the flap 39 is inserted inwardly of the front wall of the box so as to lie against the inwardly folded locking flap 2%. The inwardly extending side flap Ill-I9 act to support the cover 38 at its opposite ends.

To collapse the box from its set up position, the cover 39 is swung open and the operator proceeds to pull outwardly on the end walls H-ll which causes the corner webs to flex the pocket flaps 23-28 and the ends of the front locking flaps 20 away from the adjacent walls of the box to permit of the unfolding of the rear corner webs 22 and for the folding of the front corner webs 3|, whereupon the box assumes the flat collapsed position shown in Figure 2. Should it be desired to more compactly fold the collapsed box, the same may be folded on the

alined score lines

15 and 24 to the position shown in Figure 3 of the drawings.

Whereas I have shown and described the pocket flaps 28 and the front lock flaps 2% as being secured by metal staples or stitching, the same may be glued if desired. However, I have found that metal staples or stitching provides a more positive and inexpensive means of attaching the inner ends of the pocket flaps 28-28 to the rear wall and the attaching sections -36 of the front corner webs and the pocket flap 2!) to the front wall.

By reason of the construction herein shown and described, it is possible for me to construct a collapsible cardboard box with a cover, at less cost than heretofore, for there is a minimum amount of waste when cutting the blank A from the stock material.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent of the United States, is:

l. A collapsible box comprising a single lanl;

of cardboard cut, scored and folded to provide a rectangular shape bottom wall, end walls hinged to said bottom wall, front and rear walls hinged to said bottom wall, a pair of rear foldable corner webs hinged to the rear ends of said end walls, each of said rear corner webs having a diagonal fold line dividing the same into an attaching section and a triangular shape web fold section having a free edge, pocket flaps connected to the attaching sections of said rear corner webs along hinge scores and being foldable inwardly thereover, fastening tabs integral with the outer ends of the pocket flaps extending beyond the plane of said free edge, said attaching sections lying flat against the inner side of said rear wall, means securing the fastening tabs of said pocket flaps to the rear wall, a pair of front foldable corner webs hinged to the front ends of said end walls, each of said front corner webs having a diagonal line dividing the same into an attaching section and a web fold section having a free edge, the attaching section of said front corner webs fitting flat against the inner side of said front wall, a front pocket flap folded inwardly from the top edge of said front wall and overlying said front corner webs, means securing the inner end portions of the attaching sections of said front corner webs and the front pocket flap fiat against the front wall, whereby the free edges of the triangular shaped web fold sections of the front and rear corner webs flex the pocket flaps outwardly to enable portions of the web fold sections to interlock with the respective front and rear pocket flaps when the box is in set up position, and a cover hinged to the top of the rear wall for overlying the open top of the body of the box when the cover is in closed position thereover.

2. A corner lock construction for collapsible cardboard boxes having a rectangular shaped bottom wall, adjacent side and end walls integral with the bottom wall and connected to the side and end edges thereof along hinge scores, a square shaped corner web integral with the adjacent ends of the side and end walls and connected thereto along hinge scores, a diagonal hinge score extending across the corner web from the corner of the bottom wall to the opposite corner of the web and which divides the same into a triangular attaching web section and a foldable lock web section, a pocket flap integral with the top edge of the attaching web section and connected thereto along a hinge score disposed in alinement with the top edge of the side wall, a tab extension integral with the pocket flap and projecting beyond the plane of the free edge of the foldable lock web section, said end wall being folded inwardly over the bottom wall and said corner web being flatly folded over the adjacent end portion of the side wall, said pocket flap being folded inwardly over a portion of the corner web to lap a free edge portion of the lock web section and to cause the tab extension to project beyond the free edge portion to lap the adjacent portion of the side wall, and a staple passing through the tab extension and side Wall for securing the same together, whereby outward swinging movement of the end wall to vertical position will cause the free edge of the lock web section to forcibly flex the Pocket flap outwardly and swing the side wall to vertical position and subsequently permit the lock web sec tion to assume a locked position intermediate the attaching web section and the locking flap.

DAVID LEVKOFF.