US1938910A - Method of making foldable paper boxes - Google Patents

Description

1933- cs. M. KELLER METHOD OF MAKING FOLDABLE PAPER BOXES Filed July 2, 1932 2 Sheets-Sheet l NVENTOR 'Gcozye l7. Keller LEM, ATTORNEY Dec. 12, 1933.

G. M. KELLER METHOD OF MAKING FOLDABLE PAPER BOXES Filed July 2,1932 2 Sheets-Sheet 2 u i J I l l INVENTOR Ecoryc /Z ltcller ATTORNEY Patented Dec. 12, 1933 UNITED STATES PATENT OFFICE METHOD OF MAKING FOLDABLE PAPER BOXES Application July 2, 1932. Serial No. 620,645

1 Claim.

This invention relates to improvements in the method of making paper boxes, and particularly to boxes of the kind used for containing various articles of merchandise and displaying them for 5 sale, and which have openings in their front walls closed with substantially transparent material to form windows through which the articles contained in the package are visible.

The principal object of the invention is to provide an improved method for making a paper box of this kind which is simple, rapid, and more economical than methods heretofore employed.

Another object of the invention is the provision of a method of making a foldable paper box having a transparent window therein by providing a blank sheet from which a plurality of boxes may be cut, cutting window openingsin said sheet arranged in rows and so spaced that they appear in the front walls of the boxes when the latter are cut from the sheet, pasting an elongated strip of thin substantially transparent material over the rows of openings on the rear side of the sheet to close the openings therewith, and then cutting the boxes from the sheet and with them the strips over the openings, and scoring the box for folding at one operation.

To these and other ends, the invention consists in the construction and arrangement of parts that will appear from the following description when read in conjunction with the accompanying drawings, the novel features being pointed out in the claim at the end of the specification.

in the drawings:

Fig. l is a fragmentary plan view of a blank from which a plurality of folding boxes may be cut, the window openings having been cut therein:

Fig. 2 is a similar view illustrating the application of the transparent strip;

Fig. 3 is a similar view showing the blank cut and scored for folding;

Fig. 4 is a plan view of one of the boxes detached from the blank, and

Fig. 5 is an isometric view of the completed box.

In the past, it has been the practice to make these boxes by cutting and scoring the blank, separating the boxes from the blank, pasting a transparent strip over the window opening, and then folding the box and pasting it in assembled form. Making boxes by this method, particularly small boxes, is very slow and expensive on account of the difficulty in handling and pasting the small pieces of transparent material. The

present invention contemplates the pasting of long strips of transparent material on the blank and over a plurality of window openings at one operation.

Referring particularly to the drawings, 1 indi- G0 cates a blank of suitable sheet foldable material from which a plurality of folded paper boxes may be made, and preferably of such material as heavy paper, cardboard, pasteboard, or the like, and having the window openings 2 out therefrom and arranged in alinement both vertically and horizontally across the sheet. In cutting out these openings, a pile of the sheets are cut at one operation and the pieces 3 are not cut entirely free but short distances are left uncut, as indicated at 4 in the drawings, which serve to retain the pieces in the blank sheets. The pieces are then removed, preferably by arranging them over and opening in a bench through which they are driven from the sheets with a suitable instrument, such as a hammer.

The sheets having the window openings in them are then spread on a table or bench, one at a time, and a suitable adhesive, such as glue or paste, is applied thereto in parallel bands 5 across the entire blank sheet on its rear side and adjacent the openings, and above and below the rows of horizontally alined openings. The transparent strip 6, which may be of suitable bl-E1151 parent or translucent material such as celluloid or cellulose acetate, is then applied to the bands of adhesive on the blank and over the window openings in the blank. No adhesive is applied between adjacent ends of alined openings, and consequently the transparent strip 6 is unsecured between the ends of the openings, or between the ends of the opening and the ends of the individual box after the boxes are cut from the blank. This operation is preferably carried out by two persons working together with the blank sheet on a table between them, one of them ap plying the adhesive in two bands for each horizontal row of openings at one operation while the other applies the long strip of thin transparent material to the bands of adhesive and over all of the window openings in one horizontal row. The strip of material may be conveniently applied from a roll on which it is wound.

When the transparent strips have been pasted on all the rows of window openings in the sheet, 105 the boxes are cut and scored or creased for folding, as shown in Fig. 3. This may be done by means of a press or other suitable means. In cutting out the boxes it is common practice to I leave short uncut portions along some of the lines to be cut, so that the blank boxes are retained in the sheet after cutting so that waste fragments do not interfere with the cutting operation. These short uncut portions are thereafter easily torn in any suitable or preferred manner to remove the individual boxes 7 in flat form, as shown in Fig. 4, each of which comprises end tabs 8 and 9, one of which is provided on the end of the rear wall 11 and the other on the end of the front wall 12 of the box, which wall also has the window 2 provided therein. The tabs 8 and 9 are separated from the front and rear walls by end walls 13 and 14, which are scored, as shown in the drawings, to insure easy and perfect folding. Side walls 15 and 16 of the box are formed on the sides of the front wall and scored, as shown. One of the side walls, the wall 16 in the embodiment illustrated, connects the front wall with the rear wall. The ends of the side walls are provided with scored tabs 17, to fold under the end walls when the box is closed. On the side edge of the rear wall opposite the side wall 16 is a tab 18 scored from said rear wall to be foldable thereon and arranged to overlap the side wall 15 when the box is folded and to which it is pasted by applying a suitable adhesive thereto, resulting in a completed box, as seen in Fig. 5, open at its ends.

By the above described method, boxes of this kind can be produced very economically, since by handling them in sheets a large number of small parts are avoided. Again by pasting the transparent sheet on a number of boxes in substantially one operation, the handling of a large number of very thin small pieces, which can be handled only with difficulty and slowly, is avoided. If desired to print a label or design on the outside of the box, the designs or labels may be printed on the sheets in a well known manner before the window openings are cut therein.

Although only one manner of carrying out the invention is shown and described herein, it will be understood that this application is intended to cover such changes or modifications as come within the spirit of the invention or scope of the following claim.

I claim:

The method of making foldable paper boxes having windows therein, which consists in cutting openings for the windows in a plurality of boxes in a blank sheet of material in alined rows, applying adhesive material to said blank sheet in parallel bands, said bands of adhesive material extending throughout the length of the blank sheet and located between and adjacent to said rows of openings, pasting an elongated strip of transparent material over each alined row of openings and in contact with the adjacent bands of adhesive material, and cutting and scoring the foldable boxes from the sheet, each box containing one of said openings with a portion of the transparent strip secured along lines extending parallel to the length of said opening and adjacent thereto, said strip being unsecured between the ends of the opening and the ends of the box.

GEORGE M. KELLER.

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