US2274714A

US2274714A - Folding box

Info

Publication number: US2274714A
Application number: US335905A
Authority: US
Inventors: Levkoff David
Original assignee: Individual
Current assignee: Individual
Priority date: 1940-05-18
Filing date: 1940-05-18
Publication date: 1942-03-03
Anticipated expiration: 1959-03-03

Description

D. LEVKOFF FOLDING BOX March 3, 1942.

2 Sheets-Sheet 1 Filed May 18, 1940 04x00 Ale-W405? INVENT OR.

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I ATTOZP/VZQ/JI D. LEVKOFF FOLDING BOX March 3, 1942.

Filed May 18, 1940 2 Sheets-Sheet-Z FIG. 5.

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INVENTOR.

ATTOfi/VAVSZ Patented Mar. 3, 1942 ouns-o STATES PATENT OFFICE FOLDING BOX David Levkoff, Brooklyn, N. Y. Application May 18, 1940, Serial No. 335,905

4 Claims.

This invention relates to folding boxes of the knock-down, set-up type.

The primary object of the invention resides in a collapsible cardboard box which is cut from a a collapsible four sided box which is constructed of a single blank of cardboard in which the side walls of the box are formed from portions of the blank inwardly of the confining edges thereof, whereby a saving of stock is obtained over such box blanks which have their side walls projecting from the body portion of the blank.

A further feature of the invention is the provision of a collapsible cardboard box which is rigid when set up for use, and in which the flaps for locking the box in set up position also serve to reinforce the opposed end walls.

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

Figure 1 is a plan view of an inner side of the blank from which one form of the invention is constructed.

Figure 2 is a top plan view of the box in collapsed condition.

Figure 3 is a perspective view of the box in partially erected position.

Figure 4 is a perspective view of the box in set up position for use.

Figure 5 is a vertical sectional view on the line 55 of Figure 4.

Figure 6 is a vertical sectional view on the line 8-45 of Figure 4.

Figure '7 is a plan .view of the blank from which a modified form of box is constructed.

Figure 8 is a top plan view of the modified form of box in collapsed condition.

Figure 9 is a perspective view of the modified form of box in fully erected position for use.

Figure 10 is a vertical sectional view on the line l|l||i of Figure 9.

Figure 11 is a vertical sectional view on the line of Figure 9.

Referring to the form of the invention illustrated in Figures 1 to 6 inclusive, and at present to Figure l, the letter A designates a substantially rectangular shaped blank of foldable cardboard which is scored longitudinally on the score line i0 approximately midway of its width to divide the blank into two foldable sections B and C, and on a score line H inwardly of one of thelongitudinal edges to provide a section D which has glue l2 applied to the inner side thereof. The blank A is scored transversely on the parallel score lines I3, l4, l5 and I6, which together with the score line i0, divides the section B into a bottom wall ll, outer end walls iii-l8, and locking The sections B and D may be termed end sections of the blank which section C may be termed an intermediate section of the blank. The score lines l0, II, and I 4 define. one auxiliary end wall 20, while a second auxiliary end wall 20 is bounded by the score lines III, II, and I5. That portion of the section C-between the auxiliary end walls 202|l is severed by a slit or slot 2| which extends entirely thereacross and terminates substantially midway the height of the auxiliary end walls 2020. The slit or slot 2| divides a portion of the section 0 into a pair of side walls 22-22, one of which is bounded by the score lines l0, l4, and I5, and the other by the score lines I I, I4, and IS. The width of the slot 2| predetermines the height of the side walls, the maximum identical height of both side walls being formed by a slit instead of a slot. The ends of the slit or slot 2| extend into the auxiliary end walls 20-2ll and are joined by four diagonal score lines 23 which extend to the four bottom corners of the side walls 22-22. The diagonal score lines 23 are disposed at a substantially forty-five degree angle relatlveto the score lines with which they connect, and in this instance the walls adjacent the ends of the slot 2| are curved so as to meet with the score lines 23. The score lines 23 divide each inner end wall into a substantially triangular shape folding web section 24.

To effect a folding of the blank A for gluing, the same is folded on the score line l0- so that the sectiton C overlies one side of the section B, whereupon the section or glue flap D is folded on the score line to lie against and adhere to the other side of the section B as clearly illustrated in Figure 2 of the drawings. The box may now be said to be in collapsed position for all walls are fiat and the collapsed boxes may be stacked for compact shipping and storage purposes.

To set up the box for use from the collapsed position illustrated in Figure 2, the operator with both hands, grasps the respective side walls 22 and pulls outwardly thereon which causes the respective side walls to hinge on the lines I 0 andl l, and simultaneously effects a breaking of the webs 24 on the diagonal score line 23 which permits the inner end walls 20-20 and outer end walls |B-|8 to move to upstanding position by hinging on the respective score lines I4 and i5. As the side walls, auxiliary and outer end walls move into erect position, the webs 24 fold upon and assume a fiat position against the auxiliary end walls, whereupon the flaps |9-|9 may be manually folded inwardly on the score lines l4 and Hi to a position fiat against the auxiliary end walls 2020 and folded webs 24. The flaps l9 may be cut to a size which requires that they be forcibly wedged into engagement with the side and bottom walls of the box whereby they may be frictionally held, or as shown in the drawing, the bottom edges of the flaps |9 may have projecting tongues 25 which enter respective slots 26 in the bottom wall H in line with the score lines I4 and I5. The box is now in complete set up position as illustrated in Figures 4 to 6 inclusive, and

any conventional form of cardboard cover of the slip-on type may be applied over the open top thereof.

In Figures 1 to 6 inclusive, the glue seam is disposed along the bottom wall I! of the box, but it is possible to construct a folding box which performs the same function by positioning the glue seam centrally across the bottom as illustrated in Figures 7 to 11 inclusive, and this form of the invention will now be fully described.

In the form of the invention illustrated in Figures 7 to 11 inclusive, the letter A designates the substantially rectangular blank of cardboard from which the folding box is constructed and which is scored longitudinally on the parallel score lines l|l-| which divides the blank into end sections B and D' and an intermediate sec tion C. The blank A. is scored transversely on the parallel score lines l3, l4, I5, and I6, which with the score line I ll and H divide the end sections B and D into bottom wall section H'- H, outer end wall sections |8|8', and a pair of locking flap sections |9-|9. The combined width of the sections B'D is greater than the width of the section so that when the box is initially folded for glueing, the sections 13' and D overlap, and the inner side of the overlapping portion of the section D is provided with glue l2.

Formed from the section C is a pair of auxiliary end walls 2|l-20', one of the end walls 20 being bounded by the score lines I0, I and I4, and by an edge of the blank, While the other end wall 20' is bounded by the score lines ID, and I6. That portion between the auxiliary end wall sections 2|l20' is severed by a slit or slot 2| which extends entirely thereacross, and terminates substantially midway of the height of the auxiliary end wall sections 2|l'20. The slit or slot 2| divides a portion of the section 0' into a pair of side wall sections 221-22. The ends of the slit or slot 2| which extend into the end walls 20 are joined by four diagonal score lines 23 which extend to the four bottom corners of the side walls 2222. The diagonal score lines 23' are disposed at a substantially forty-five degree angle relative to the intersecting score lines with which they connect. Each inner end Wall section 20 is provided with a pair of the diagonal score lines 23 which divide each end wall section 20 into a pair of substantially triangular shape folding web sections 24.

So far, I have only described a pair of coacting flap sections |9'-|9 which. fold inwardly over one of the auxiliary end walls 20, and if desired, a similar pair of flap sections |9--|9' may be arranged for like folding over the other auxiliary end wall 20'. However, by forming the second inwardly folding flap l9" coextensive with the other inner end wall section 20, I am able to cut the blank A from stock without any loss, except that portion of the blank which is removed to form the slot 2|, but if only a slit is formed instead of a slot there is no loss of stock. The flap I9" is taken from that end of an adjacent blankI 9A which is cut to form the flap sections To effect a folding of the blank A for glueing, the same is folded on the score lines ||l-| I so that the sections B and D overlap with the glue side l2 of the section D overlapping the adjacent portion of the section B as illustrated in Figure 8 of the drawing. When in this position the box is in collapsed position and may be set up by manually grasping the side walls 22'-22' and pulling outwardly thereon which si multaneously moves the inner and outer end walls to erect position, during which time the webs 24' fold flat against the auxiliary end walls 20-2|l'. The flap sections |9|9 having been fixedly connected by the glueing operation, they form a single flap which with the flap l9" are folded inwardly and downwardly against the inner end walls and folded webs 24'. In this form the flaps I9 and I9" have a tight frictional wedge fit between their free edges and adjacent Walls ofthe box as illustrated in Figures 9 to 11 inclusive. Articles packed in the box when in set up position will act to prevent any tendency of the flaps l9-|9 from accidentally unfolding.

In the preceding specification, I have referred to a four sided box which may be square, or rectangular in configuration, and to distinguish the opposed upstanding walls of the box. I have referred to a pair of opposed walls as being side walls, and the other pair as being end walls. However, all of the upstanding walls may be referred to as side walls if desired, and any interpretation of the appended claims should be so construed.

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

1. A folding rectangular cardboard box blank including a rectangular panel forming at least a portion of the bottom wall, a rectangular onepiece panel integral with the bottom wall panel and of a width substantially equal to that of the bottom wall and of a length equal to the combined length of the bottom and end walls of the box formed by said blank, said one-piece panel having transverse fold lines adjacent each end defining an intermediate side wall forming panel and auxiliary end wall panels, said one-piece panel further having a longitudinal medial slot extending entirely across the side wall forming panel and separating the same into separate side wall panels, said slot extending into the auxiliary end wall panels with its ends terminating in the auxiliary end wall panels substantially midway of the height thereof, the edges of the slot along the side wall forming panel forming the top edges of the side wall panels and the bottom edges of the side wall panels lying along the outer edges of the said one piece panel, diagonal hinge scores extending from the bottom corners of the side wall panels to the respective adjacentv terminal ends of the slot and being disposed at a substantially forty-five degree angle relative to the bottom edges of the adjacent side wall panels to provide folding corner webs, and end wall panels integrally connected to the respective auxiliary end wall panels along hinge scores for folding inwardly against the respective auxiliary end wall panels when the blank is folded to erected box forming position. v

2. A folding rectangular carboard box blan including a rectangular bottom wall panel, a rectangular one-piece panel integral with the bottom wall panel and having one of its sides connected thereto along a hinge score, a glue flap connected to the other opposite side of the onepiece panel, said one-piece panel being of a width substantially equal to that of the bottom wall panel and of a length equal to the combined length or the bottom wall panel and end 'walls of the box formed by said blank, said one-piece panel having transverse fold lines adjacent each end defining an intermediate side wall forming panel and auxiliary end wall panels, said onepiece panel further having a longitudinal medial slot extending entirely across the side wall forming panel and separating the same into separate side wall panels, said slot extending into the auxiliary end wall panels with its ends terminating in the auxiliary end wall panels substantially midway of the height thereof, the edges of the slot along the side wall forming panel forming the top edges of the side wall panels and the bottom edges of the side wall panels lying along the 3. A folding cardboard box blank as set forth in claim 2, including locking flap panels connected to the respective end wall panels along hinge scores and being .foldable inwardly against the respective auxiliary end wall panels for securing the folded blank in box forming position for use.

4. A folding rectangular cardboard box blank including a pair of rectangular panel sections which combined form a rectangular bottom wall,

a rectangular one-piece panel integral with the bottom wall panels and of a width substantially equal to that of the bottom wall and of a length equal to the combined length of the bottom and end walls of the box formed by said blank, said 'one-piece panel having transverse fold lines adjacent each end defining an intermediate side wall forming panel and auxiliary end wall panels, said one-piece panel further having a longitudinal medial slot extending entirely across the side wall forming panel and separating the same into separate side wall panels, said slot extending into the auxiliary end wall panels with its ends terminating in the auxiliary end wall panels substantially midway of the height thereof, the edges of the slot along the side wall forming panel forming the top edges of the side wall panels and the bottom edges of the side wall panels lying along the outer edges of the said one-piece panel, diagonal hinge scores extending from the bottom corners of the side wall panels to the respective adjacent terminal ends of the slot and being disposed at a substantially forty-five degree angle relative to the bottom edges of the adjacent side wall panels to provide folding corner webs, and end wall locking panels integrally connected to the respective end wall panels along hinge scoresg DAVID LEVKOFF.