US1477963A

US1477963A - Reenforced paper-box member

Info

Publication number: US1477963A
Application number: US513272A
Authority: US
Inventors: Elie W Labombarde
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-11-07
Filing date: 1921-11-07
Publication date: 1923-12-18
Anticipated expiration: 1940-12-18

Description

Dec. 18 1923. 1,477,963

E. W. LABOMBARDE REENFORCED PAPER BOX MEMBER Filed Nov. *7, 1921 av I Patented Dec. 18, 1923.

urea STATES ELIE W. LABOMBARDE, OF NASHUA, NEW HAMP$HIRE BEENFORCED PAPER-BOX MEMBER.

Application filed November To all whom it may concern:

Be it known that I, ELIE W. LABOMBARDE, a citizen of the United States, and resident of Nashua, in the county of Hillsborough and State of New Hampshire, have invented certain new and useful Improvements in Reenforced Paper-Box Members, of which the following is a specification.

This invention relates to paper boxes of that type which have side and end walls perpendicular to the body portion which forms the bottom or top of the member according to whether said member is the receiving member of the box or the lid or cover therefor, and the invention has particular reference to means for reinforcing the corners of such members.

To open a closed box of this type it is customary to engage an edge of the lid or cover and lift it. This causes a strain which frequently results in breaking the corner. Hence the object of my invention is primarily to reinforce the corners of box lids or covers although I do not limit myself thereto since the same construction is advantageous for the receiving members of boxes.

Among prior structures designed to secure the production of pasteboard boxes with strong corners, stay strips of paper or cloth, or lengths of string, have been arranged to extend around the box members. The difliculty of locating such stays in cor rect position led to the employment of relatively small stays or strips extending across the crease lines on which the blank is folded to set up condition, and pasted to the blank on both sides of said crease lines. Such stays or strips are usually of very strong material, such as kraft paper, their tensile strength being greater than that of the pasteboard or box blank. They are pasted down both sides of the crease lines of the blank while the latter are fiat, and therefore, when the blank is folded on the crease lines the presence of such pasted stays causes a resistance to the folding and frequently results in a prying apart of the material of the relatively weak paste-board, leaving a weakened or broken corner.

An important feature of my present invention is that I locate reinforcing tabs on the creased blanks so as to cross the crease line thereof, but leave said tabs free to slide on the surface of the blank when the blank is folded, thereby avoiding any straining effect on the blank due to the presence of the tabs.

Of the accompanying drawings, in which I have selected a box lid or cover to illustrate my invention Figure 1 is a plan view of the cut and creased blank with reinforcing tabs located at the corners.

Figures 2, 3 and 4 are perspective views illustrating successive steps in the conversion of the blank to box member form.

Figure 5 represents a section on line 55 of Figure 4.

Referring first to F i ure 1, the blank is out and. creased to form a central or body portion 12, double side wall sections 13, 1 1-, and

end wall sections

15, 16, each vall section 13 having tongues 17. This is a wellknown form of blank.

My invention consists in the tabs which, in the illustrated embodiment, are indicated at a. Said tabs are preferably made of kraft paper and in practice are thinner than indicated in the drawings. They are shown rather thick merely for clearness of illustration. The tabs are of a size to overlie portions of the

sections

13 and 14 and tongues 17 and to extend out over the space or re-entrant angle between the edges of sections 14 and tongues 17 The tabs are ontirely free fromthat is, they are not adhesively secured totwo of the blank portions over which they lie. In fact for some purposes they need not be attached to any portion of the blank at all except for the fact that if not held they would be liable to slip out of position during the folding operation. This is because their reinforcing effect is due to the interfolding presently described, and not to their being adhesively connected.

As shown, the tabs a extend across the crease lines between sections 13, 1 and the crease lines between sections 13 and tongues 17. They are preferably held in their lo cated positions by any suitable adhesive indicated by the dotted areas in Figure 1. In other words, the tabs a are indicated as attached solely to the ends of the sections 13 and are entirely free from any connection with the sections 1 1 or the tongues 17 When the blank is folded, it is customary to first (either by hand or machinery) apply stripes of glue the full length of sections 14 as indicated by the dotted areas thereon in Figure 1. Then the sections 14 are folded in and glued down on sections 13. This folds each tab (0 over as indicated in Figure 2. The portion of the tab folded over, not being attached to section 1a, is free toslide relatively theretoand accommodate itself thereto without causing any strain on the crease line between

sections

13 and 14.

The next foldin steps are to turn the folded parts 13, let up and the tongues 17 in at a right angle thereto as shown in Figure 3, the latter causing no strain in the now upright portion of the box member for the same reason as explained in connection with the first folding operation.

The final folding is effected by bending the end wall sections 15 up against the outer faces of the tongues 17 (compare Figs. 3 and 1-) and folding the sections 16 over inside and securing them by any suitable adhesive or well-known interlocking feature not necessary to illustrate.

By referring to lligure 5 in connection with Figure 1 it will be seen that no adhesive is necessary to enable the tabs (4 to perform their reinforcing function. The interfolding of the tabs with the wall sections results in the tabs extending around the angles as shown in Figure 5 in such manner as to reinforce those angles without relying upon any adhesive whatever. by the omission of adhesive the tabs effect the reinforcing without straining the angular portionsof the box member which are outside thereof.

While Figure 5 indicates but a single thickness of the tab a, due to said figure indicating a section on line 5-5 of Figure 4, it will be readily understood from Figure 3 that the tab a is a double thickness around sizes of the different portions may be such as tomake deeper box members, or boxes the length of which relatively to their widths ma be greater or lesser than illustrated.

Flaving now described. my invention, I claim: 7

1. A creased box member blank having reinforcing tabs located in positions crossing the crease lines and free to shift relatively to said lines when the blank is folded.

2. A creased box member blank having re inforcing tabs located in positions crossing the crease lines, each of said tabs being secured to the blank solely at one side of said lines.

A creased box member blank having foldable wall sections and having reinforcing tabs, each tab being secured at a single point or area to the blank and having free portions to be interfolded with said wall sections.

4t. A creased and foldable box member blank having reinforcing tabs extending across the crease lines and secured to the blank, each tab having a portion of its area unsecured to the portion of the blank which it overlaps, whereby strain on the crease lines when the blank is folded is avoided.

5. A box mcmberhaving folded wall portions including tongues extending around the corners thereof, and reinforcing tabs extending around said corners and. inter ELIE w. LABOMBARDE.

Witnesses:

KATHRYN Gross, HAZEL M. JEWELL.