US2620116A

US2620116A - Double-walled carton

Info

Publication number: US2620116A
Application number: US148295A
Authority: US
Inventors: Linus J Mcdonough
Original assignee: CORSON Manufacturing Co
Current assignee: CORSON Manufacturing Co
Priority date: 1950-03-08
Filing date: 1950-03-08
Publication date: 1952-12-02
Anticipated expiration: 1969-12-02

Description

Dec. 2, 1952 L, J MCDQNOUGH 2,620,116

DOUBLE-WALLED CARTON Filed March 8, 1950 #58 32 F] G. 4, INVENTOR.

ILINUS J MDONOUGH Patented Dec. 2, 1952 DOUBLE-WALLED CARTON Linus J. McDonough, Lockport, N.

Y., assignor to Corson Manufacturing Company, Lockport,

N. Y., a corporation Application March 8, 1950, Serial No. 148,295

2 Claims.

This invention relates generally to folding boxes or cartons and more particularly to cartons of the double-walled type adapted for protection of the contents.

Inthe past, various forms of double-walled cartons have been developed of light-weight materials to provide inexpensive containers for economical shipment, storage and display of fragile merchandise. And as the need for such containers has increased, so has the need increased for simplicity of construction and speed in manufacturing.

The present invention provides an improved, double-walled container comprising a single sheet of material which, when folded, produces a smaller box held firmly in spaced relationship inside a larger box. Much the same result is gained by this simple, single-sheet box as is found in the complex standard box with a corrugated sleeve or liner.

A distinct contribution to the basic problem here is found in U. S. Patent No. 975,121 issued November 8, 1910 to James H. Carter. Carter has developed a double-walled box by folding a single sheet of flexible material into a series of parallel sections with a suitable adhesive applied longitudinally along the marginal area of one of the intermediate sections. The box as fully described hereinafter, however, embodies a further improved product more easily adapted to simple and high speed production methods.

A primary object of this invention is to provide a single-sheet, double-walled carton comprising two spaced boxes, one within the other, formed in a single operation with a minimum of folding and gluing by standard production machines.

Still another object is to produce the desired container wherein the inner and outer boxes are integrally joined and interlocked for practical rigidity.

A further object of the invention is to provide a double-walled box having sufiicient bottom or end reinforcement without complex folds.

Anadditional object of this container lies in the simple construction whereby the final packing by the distributor may be accomplished at great speed by machine or manually, thus promoting economy and eflicient handling of merchandise.

More specifically, and in accordance with the preferred form, the invention resides in an integral, intermediate section which connects the inner and outer boxes rigidly but without placing strain upon the gluing or adhesive area. This is accomplished by a score line or lines on the connecting section near the adhesive area thereon.

The invention is described in detail with reference to the accompanying drawing in which:

Figure 1 is a plan view of the completed sheet or blank showing the outer face;

Figure 2 is a perspective view of the box, with its bottom end open, formed by folding the blank in Figure 1, there being a side portion cut away to show the integral connecting section;

Figure 3 is a sectional view taken through the box completed, folded and closed in an upright position with sections l4 and 28 removed, and t Figure 4 is a transverse sectional view taken along the line AA of Figure 2, showing particularly the integral connecting section.

As shown in Figure 1, the container is formed from a single sheet or blank of flexible material (e. g. paper stock or cardboard) divided generally into two main portions B and C, designating, respectively, the inner and outer boxes or receptacles which comprise inner and outer sleeve portions respectively.

Portion B, basically, is rectangular and subdivided by four parallel sections In, I2, l4 and I6 by score or folding lines I 8, 20, 22 and 24. The sections I 0, l2, I4 and I6 thus form the outside walls of the inner box or sleeve.

Portion C, similarly, comprises four

parallel sections

26, 28, 3B and 32, divided by the

fold lines

34, 36, 38 and 40. These latter sections form the outer box or sleeve. In addition, portion C is provided with

flaps

42, 44, 46, 48, and 52 which act as top and bottom closures for the completed carton. Portion. B also has a flap 56 which forms the bottom member of the inner box and acts as additional protection for the contents. A plurality of spacing tongues or lugs 58 are cut from the portion B and are arranged at spaced intervals in staggered relation with each other upon opposite sides of the fold lines 18, 2|, 22 and 24 and on the free or outer edge of section II] at 58'.

An important section 60 of the blank connects portions B and C and is the keystone to the construction of the carton. The shaded area 62 of section 60 represents a coating of adhesive against which the marginal portion of the inner face of section 32 is pressed thus binding the two boxes firmly together. In this preferred form, a single score line 64 extends along the innermost edge of the adhesive area and thus permits the nonadhesive portion of section 60 to be bent slightly without placing undue strain on the binding adhesive. Particular attention is directed tothe tion C is folded or wrapped around the inner box and is spaced therefrom by the tongues 58. As

previously mentioned, a suitable adhesive is applied to the area 62 and isengaged by the inner face of section 32. As the final folding is completed, tension is placed on the'adhesive'area andv section 60 bends along line 64 thereby producing an accurate rectangular. carton held firmly together Without undue stress or strain. A clear representation of. the completed box is best shown by reference to the enlarged view of Figure 4.

Assembly of the carton by machine is somewhat different from the basic folding described above. Usually; standard machinery for folding this rectangular carton'folds the blank four'times, that is,'.along the lines 20, 24; 36 and 40; This type of folding-produces a flattened box for convenient shipment bythe manufacturer to the packer. The remaining folding necessary for completing the box vform is done by pressure against the outer edges-of thefiattened box whereby the inner and outer boxes are snapped into placein one operation. Specific details of the various methods of folding and of the numerous box sizes and shapes possible is not included in this description because of modifications obvious to one skilled in the-art; The folding of the tabs or

flaps

42, 44, 4'63"4'8I50, 52 'and 56' to form top and bottom closures is also obvious and subject to variations of size and-location The carton illustrated herein, for example, is adapted particularly for glass bottles where the bottle cap itself is sufficient top protection and the flap 56 is adequate bottom reinforcement.

Reference'is made further to Figure 4 for a better understanding of the essential features of this invention. The connecting section 60 is clearly shown in final position and bent along score line 64 near the adhesive area 62 so that uniform spacing by the tongues 58 is maintained around the inner box. Tongues or tabs 58' on the free end of section lie adjacent the tongues 58 on section 60.

The present disclosure is for the purpose of iilustration only and sizes, proportions and specific arrangements of the various parts may be made without departing from the spirit of the invention;

Having thus described my invention, I claim:

1. A duplex box formed of a single blank, comprising a plurality of aligned successive sections folded around each other along parallel marginal lines in one direction only and formin an inner sleeve portion and an outer sleeve portion spaced from and surrounding the same, the inner sleeve portion including four successive sections forming a rectangular structure, the outer sleeve portion including four successive sections forming a rectangular structure, and a fifth connecting section joining said inner and outer sleeve portions connected to the fourth section of the inner sleeve portion along a marginal fold line and having a fold line atthe juncture of said fifth connectin section and the first section of the outer sleeve;

said fifth connecting section having a score line extending throughout the length thereof intermediate of and parallel to the parallel marginal fold lines of the fifth connecting section thereby dividing said fifth connecting section into a first portion lying intermediate the fold line connecting it to the fourth section and said score line and a second portion intermediate the other marginal fold line and said score line, said first portion of the fifth connecting section extending from the marginal fold line connecting said fourth and fifth sections at a diverging acute angle to the first section of said sections comprising said inner sleeve portion, the terminal section of said outersleeve portion overlying said second portion of said fifth connecting section and bein engaged therewith, whereby said angular divergent position of said first portion of said fifth connecting section permits said last named portion to extend diagonally between said spaced inner and outer sleeves to impart stability to said box and said score line in the fifth connecting section relieves undue strain on the engagement between said terminal section and said second portion of the fifth connecting section, said fourth section of the'inne'r sleeve and the first portion of the fifth connecting section at their common fold line having cuts formed therein along opposite sides of said last named fold line to provide oppositely extending tongues of length corresponding to the distance between the inner and outer sleeves and said first section of the inner sleeve having similar tongues projecting from its terminal elongated edge adapted to project through said cuts in the fourth section of the inner sleeve and lie adjacent said tongues on said first portion of said fifth connecting section 2. A duplex box formed of a single blank, com: prising a plurality of aligned successive sections folded around each other along parallel marginal lines in one direction only and forming an inner sleeve portion and an outer sleeve portion spaced from and surrounding the same, the inner sleeve portion including four successive sections forming a rectangular structure, the outer sleeve portion including four successive sections forminga rectangular structure, and a fifth connecting section joining said inner and outer sleeve portions connected to the fourth section of the inner sleeve portion along a marginal fold line and having a fold line at the juncture of said fifth connecting section and the first section of the outer sleeve, said fifth connecting section having a score line extending throughout the length thereof intermediate of and parallel to the parallel marginal fold lines of the fifth connecting section thereby dividing said fifth connecting section into a first portion lying intermediate the fold line connecting it to the fourth section and said score line and a second portion intermediate the other marginal fold lineandsaid score line, said first portion of the fifth connecting section extending from the marginal fold line connecting said fourth and fifth sections at a diverging acute angle to the first section of said sections comprising said inner sleeve portion, the "terminal section of said-outer sleeve portion overlying said second portion of said fifth connecting section and being engaged therewith, whereby said angular divergent position of said firstportion of said fifth connecting section permits said last named portion to extend diagonally between said spaced inner and outer sleeves to impart stability to said box and saidscore line inthe fifth connecting section relieves undue strain on the engagement between said terminal section and said second portion of the fifth connecting section, the first section of the inner sleeve having tongues projecting from its terminal edge to lie in the plane of said first section and each of the four sections of the inner sleeve having tongues extending from the marginal fold lines thereof to form four sets of tongues to serve as spacers at each of the four corners of the inner sleeve. said four sets of tongues being formed by making cuts along opposite sides of the marginal fold lines to'provide oppositely extending tongues of length corresponding to the distance between the inner and outer sleeves, said first named tongues extending through cuts in the fourth section and lying adjacent the tongues on said first portion of said fifth connecting section.

LINUS J. MCDONOUGH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS