US340076A - Paper bag - Google Patents

Description

(No Model.) 4 Sheets-Sheet 1. D. APPEL.

PAPER BAG. y. No. 340,076. Patented Apr. 2o, 1886.

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D. APPEL.

PAPER BAG. No. 340,076. Patented Apr. 20, 1886.

(No Model.) 4 Sheets-Sheet; 3.

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y PAPER BAG. No. 340,076. Patented Apr. 20, 1886.

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PAPER BAG.

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, UNITED STATES PATENT OFFICE.,

DANIEL APPEL, OF CLEVELAND,"OHIO, ASSIGNOR TO THE UNION PAPER BAG MACHINE COMPANY, OF PHILADELPHIA, PENNSYLVANIA.

PAPER BAG.

SPECIFICATION forming part of Letters Patent No. 340,076. dated April 20, 1886.

Application filed July 25, 1885. Serial No. 172,619. (No model.)

To all wh/0m it may concern:

Be it known that l, DANN-1L APPEL, a citizen of the United States, residing' at Cleveland, county of Cuyahoga, and State of Ohio, have invented certain new and useful Improvements in Paper Bags, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to that general class of paper bags which are known in the art.- as bellowssided Satchel-bottom bags, it being the object of the invention to produce a bag of this class in which the plies of paper forming the bottom shall be niore evenly dist-ributed, so as to provide a stronger and at the same time more flexible bottom than has been provided in those bags of this class which have heretofore been constructed.

As a full understanding of the invention can be best given by a detailed description of the manner in which the bag is constructed, such description will now be given, reference being had to the accompanying drawings,in which- Figure lis a view of a number of the blanks from which the bag is made before they have been severed from each other, or while they are still in web form. Fig. 2 is a perspective view, upon an enlarged scale, of the bottomforming end of the blank after it has been folded into tubular form. Fig. 3 is a side view of the same. Fig. 4 is an edge View ofthe same, showing it somewhat distended, so as to partially open the bellows folds. Fig. 5 is a View similar to Fig. 2, illustrating the first step in the operation of forming the bagbottom. Fig. 6 is a view similar to Fig. 3, showing the blank after this step has been completed. Fig. 7 is an edge view of the blank when in the condition shown in Fig. 6. Fig. 8 is a view similar to Fig. 7, illustrating one part of the second step in the formation of the bag-bottom. Fig. 9 is a view similar to Figs. 7 and 8, illustrating the other part of the second or final step in the operation of forniing the bag-bottom. Fig. 10 is a view similar to Figs. 3 and 6, showing the completed bag. Fig. l1 isa longitudinal section of the same. Fig. 12 is a perspective view of the bottom of the completed bag when distended. Fig. 13 is an inside View of the bottom of the bag when distended; and Fig. 1 4 is a view similar to Fig. 9, illustrating a slight modification, which will be hereinafter referred to.

The bags containing this invention may be made from detached blanks which have been previously cut to the proper dimensions; but in practice a continuous web or strip of paper will preferably be employed, as is common in the manufacture of other classes of paper bags.

Vhen the bags are made from a continuous web, the web will first be provided with slits c, as shown in Fig. l, which will be located in transverse rows across the web, and at such distances apart along its length that when it is severed upon the lines b to form the blanks A they will be at the bottom-forming end of each blank. After being provided with the slits a the edges of the web will be folded inward on the lines c, then outward on thelines e, inward again on the lines f, outward again on the lines g, and then inward on the lines h, after which the edges ofthe web will be united by suitable lines of paste applied thereto, thus producing the double bellows-sided tube illustrated in Fig. 2, the slits a being coincident with the two inward folds t' t' of the bellows upon each side of the tube, as shown in Fig. 4.

Then the bags are made from a continuous web, the blanks A may be severed from the web afterit has been converted into tubular form, as just described, or the severing of the blank from the web may be delayed until after the bottom is formed, as will be present-ly described.

\Vhen the bags are made from detached blanks,the slits a, will be made in the bottomforming end of the blank, after which the blank will be folded into tubular form, as just described.

After the tube has been formed, as just described, whether it be in the form of a continuons web or a detached blank, the operation of closing the end of the tube to form the bagbottom is as follows: The sides k of the bottom-'forming end will be separated or drawn apart, and one of the sides will be folded back upon the line Z onto the body of the blank, as shown in Figs. 5, 6, 7, and 8. This operation will be facilitated by creasing the material upon the line Z, though it may be performed without such creasing. The strain upon the material during this operationv will cause the naps m,

which are formed by the slits a in the ends ofthe outward folds a of the bellows, to turn inward toward each other, as shown in Fig. 5, in which position -they will be pressed dat onto the body of the blank and their edges united by a line ofpaste applied thereto, as shown in Fig. 6. This completes the first step in the formation of the bag-bottom. After this is done the sides lc, one after the other, will be folded inwardly over on the lines o, as shown in Figs. 8 and 9, in which position they will be pressed flat and secured to the flaps m and to each other by lines of paste, as indicated in Fig. 6. This constitutes the second step in the formation of the bag-bottom, and brings the bag to the condition shown in Figs. l0 and .'ll.

Although it is preferable that the sides k should overlap each other when folded over onto the flaps m, it is not necessary that they should do so, as when the Haps m overlap, a perfectly-tight bagbottom will be formed, even if the sides 7c do not overlap, and even if they do not quite meet each other, as shown in Fig. 14. The same is true in regard to the flaps m. 1t is preferable that they should overlap, as shown; but when the sides k overlap, a tight bottom will be formed, even if the aps m do not meet.

The bag thus constructed will readily assume a square or rectangular shape, as shown in Fig. 12, in the act ot' filling, without being previously opened by hand, and in addition to this it will be seen thatthe plies ofpaper forming the bottom of the bag are so distributed as to give a practically uniform thickness to the bottom, the two interior flaps m extending entirely across the bottomin one direction, and being united at their edges by aline of paste, as shown in Fig. 13, While the sides k extend entirely across the bottom in the opposite direction, crossing the aps m, and being united by a line of paste extending in the opposite directiomas shown 'in Fig. 12,.,l

thus giving to the bag the additional strength due to the two pasted seams crossing each other on the bottom of the bag in opposite di-.

rections.

What I claim is- 1. A bag having bellows sides formed by the inward folds and outward folds n, and

a .satchel-bottom consisting of the interior apsm and the inwardly-folded sides k, substantially as described.

2. A bag having bellows sides lormedfby .the inward folds z' and outward folds n, and

Witnesses:

GEO. H. GRAHAM, T. H. PALMER.

DANIELr APPEL.

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