US520587A - Peooess of making paper bags - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1. E; E. GLAUSSEN. PROCESS OF MAKING PAPER BAGS.

No. 520,587. Patented May 29, 1894.

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(No Model.) 2 Sheets-Sheet 2. E. E. 'OLAUSSEN. PROCESS OF MAKING PAPER BAGS.

No. 520,587. Patented May 29, 1894.

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NITED STAT S ATENT FFIQE.

EDWARD E. OLAUSSEN, OF HARTFORD, CONNECTICUT, ASSIGNOR TO ALBERT H. \VALKER," TRUSTEE, OF SAME PLACE.

PROCESS OF MAKING PAPER BAGS.

SPECIFICATION forming part of Letters Patent No. 520,587, dated May 29, 1894.

Application filed August 18 1892. Serial No. 443.36 1. (No specimens.)

f0 aZZ whom it may concern.-

Be it known that I, EDWARD E. CLAUssEN, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Processes of Making Paper Bags, of which the following is a full, clear, and exact specification.

This invention is a new and useful process of making square bottomed paper bags, which when folded have bellows sides and flat bottoms.

Figure 1 is a perspective View of a length of paper tubing such as is produced by the first step in my process. Figs. 2, 3 and 4 are a plan, a side, and an end View respectively of the blank of Fig. 1 with its side plies turned in. Figs. 5, 6 and 7 are a plan, a side, and an end View respectively of a hollow former and of a pair of folding fingers at the sides of Fig. 8 is a plan View of the blank of Figs. 2, 3 and 4, when that blank is flattened together. Fig. 9 is a plan view of the blank of Fig. 8 with the upper half of its folded end turned back on the line ab upon the body of the blank, forming a truncated diamond shape. Fig. 10 is a plan of the completed bag and Fig. 11 is a perspective view of that bag opened into rectangular form. Figs. 12 and 13 are perspective views representing the operation'of my process upon a continuous length of tubing, the tube being broken 01f at X in Fig. 12, and continued at the corresponding point X in Fig. 13. Fig. 14 is a modification of what is shown in Fig. 8.

Following is a detailed description of my new process.

The numeral 1 represents a hollow former, the cross section of which resembles the outline of a capital letter I turned on its side. The side walls 7 and 8, corresponding to the top and bottom crosses of the I, are flat, but the upper and lower walls are each in the form of a truncated V, the angular sides of which extend from the borders of the side walls 7 and 8, at an angle of about forty-five degrees therewith as shown at O in Fig. 7. The width of the angularsides of the V is equal to about one half the width of one of the side walls 7 or 8.

' Having thus particularly described the brought into substantial conformity with the walls of the former, as shown by dot-anddash lines in Figs. 5, 6 and 7. One end of that tube is provided with the slits 3, 4, 5 and 6 as seen in Fig. 1, and that slitted end of the tube is made to project beyond the front or left hand end of the former as seen in Figs.

5 and 6. Upon the oscillating shafts 9 and 10, and adjacent to the angular edges 13 and 14 of the former 1 are arranged a pair of curved fingers 11 and 12. The Walls of the projecting portion of the blank arethen folded inwardly against the front end of the walls 7 and 8, and the edges 13 and 14 of the former 1, by the action of the fingers 11 and 12, which are turned from their outer positions shown in Fig 5, to their inner dotted positions 15 and 16 shown in that figure. A triangular portion of each of the side walls of the tube, bounded by the lines 34, 35 and 36 of Fig. 3, is carried by the fingers 11 and 12 against the insides of the walls 7 and 8 of the former 1. The fingers are then returned to their open positions, and the blank is drawn off from the former, appearing as in Figs. 2, 3 and 4 with the two inturned folds l7 and 18. The next step in the process consists in flattening the blank into the form shown in Fig. 8. This is done by bringing together the corners, 23 and 24, pushing the side walls, 22 and 22', inwardly toward each other and forming inwardly projecting longitudinal tucks, the inner edges of which are represented by the dotted lines 25 and 26. The upper half, 27, of that folded portion of the blank which is at the left of the linea-b, is next folded over on that line down upon the body of-the blank, thus producing the diamond shaped form, 28, of Fig. 9, having the inwardly projecting triangular folds 29 and 30, and the longitudinal tucks, 25 and 26.

Paste is next applied to the blank as shown at 31, in Fig. 9, and the process is completed by folding over the flaps 32 and 33 and pressing them down upon the blank, thus finishing the rectangular bottom as shown in Fig. 10.

The above description applies to the folding of a single blank by my new process, but that process may be performed continuously upon a continuous length of tubing, as illustrated by Figs. 12 and 13, and as will next be described. In those figures the tube is provided with slits, 3 and 4, in its upper wall, and also with corresponding slits on its under wall, not shown. The tube is partly sev-' ered at and 46, the lines of severance running across the side walls, 22 and 22, and extending inwardly across the upper and lower walls to the front ends of the four slits. Those slits and partial severance cuts are at intervals equaling the lengths of blanks required. The tubing 40 is drawn over a ho1- lowI shaped former at 47, where the tube assumes the form shown in Fig. 1. As the tube is drawn to the position 48, the front ends of the severed side walls are turned inwardly nto the form shown in Figs. 2, 3 and 4. Pass- -1ng along to the positions 49 and 50, the remalnlng portions of the side walls are pushed inward and the blank is gradually flattened down to the form shown in Fig. 8. At the position 50, of Fig. 12, the central portion of the upper wall is severed at 5 1 and the upper half, 27, of the blank is folded over on the line ab back upon the body of the blank,as

' shown in the position 52 of Fig. 13, forming the diamond shape as in Fig. 9. Lines 31, of paste, are then applied to the diamond. The rearward flap 53 is next folded forward upon the body of the diamond and'the central portion of the lower wall is severed at 54 from the preceding blank, as shown at the position 55. Then the forward flap, 56, is folded over and pressed down upon the rearward flap, thus completing the process as shown at 57, and producing abag similar to that of Fig. 10. The operation of turning in the side Walls in the process illustrated by Figs. 12 and 13 may be performed by the fingers of the hands, by mechanical means, as for example, such as those shown in Figs. 5, 6 and 7, or by means of atmospheric pressure in any one of several well-known methods. The triangular inward folds 29 and 30, which when folded together as in Fig. 8, appear as two small triangles c and d respectively, may be folded as represented by c and d in Fig. 14, without departingfrom the spirit of this invention, as the position of those folds in those figures is only a transitory one.

The characteristic and distinguishing features of this invention are:the production of a paper tube having the described I shaped cross section, and the conversion of that tube into a paper bag by turning in a portion of the side walls to form the bottom while the tube is the I shaped form; then in collapsing the tube and forming the diamond'and finally in completing the bag by cross folding the flaps.

I claim as my invention 1. The process of making a paper bag having bellows sides and a flat bottom, which consists in making an I shaped tube, cutting continuous tube, which process consists in forming that tube with an I shaped cross section and defining the length of a blank by the cuts 45 and 46, and the slits 3,4, 5and 6, then turning in the leading ends of the side walls of that blank and flattening it by collapsing the remaining portions of those side walls, then severing the central portion of the upper wall and folding the forward upper half of the blank on the line a-b then completing the bag by cross folding the flaps 53 and 56; all substantially as described.

EDWARD E. OLAUSSEN.

\Vitnesses:

W. J. BELOHER, W. H. HoNIss.

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