US1779870A

US1779870A - Paper bag

Info

Publication number: US1779870A
Application number: US235192A
Authority: US
Inventors: Appel Daniel
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-11-23
Filing date: 1927-11-23
Publication date: 1930-10-28
Anticipated expiration: 1947-10-28

Description

D. APPEL PAPER BAG Oct. 28, 1930.

Filed Nov. 23, 1927 3 Sheets-Sheet 1- PIE-1 F'IE- 3 ram I. ms

FIE-4- nventoz D. APPEL PAPER BAG Oct. 28, 1930.

5 Sheets-Sheet 2 Filed Nov. 23, 1927 Quorum Oct. 28,1930.

D. APPEL PAPER BAG 5 Sheets-Sheet .3

Filed No v. 25, 1927 PIE-1U F'IE- 13 PIE-12 awvewtoz I I l l i I 1 i I .Eur UH BUCKLED uwwmmr- W l i g Patented Oct. 28, 1930 UNITED STATES DANIEL APPEL, OF CIIEVELAND, OHIO PAPER BAG Application filed November 23, 1527. Serial No. 235,192. i

My invention relates to an improvement in paper bags, my object in general being to provide a simple construction of bag which may be manufactured rapidly and economically in a flat state and thereafter readily unfolded and opened to provide a dished bottom adapted to support the bag in a stable upright position when placed at rest upon a flat surface. Broadly speaking it is an old prac- 1 tice to make flat seating or so-called square bottomed bags from plicated or bellows tubing, and I have devised and patented various forms of such paper bags and different methods and machines for producing them. I

- find from past experience that the various folds and tucks required to produce the square bottoms according to accepted prac- "tices decreases the speed of production and increases the cost however figured or esti- 7 mated, compared with the production of a paper bag having a simple hem or fold at one end according to an early and old practice.

Such simple folded bags are sold and'used extensively today, but it should be understood that these bags do not open up on definitely fixed lines to produce a flat supporting bottom and therefore they lack the advantages of the pre-formed square bottom type. In that connection it has been proposed heretofore to corrugate or score the folded bottom of the hemmed type of bag on straight lines transversely near its closed end and also diagonally" of the corners to promote unfolding movements of the bottom on rectangular lines so as to provide a square bottom, reference being bad to the Letters Patent of the United States No. 904,169 granted to H. G. Widmer, Nov. 17, 1908. The mere scorin or corrugating of the bag as taught by this not suflicient in itself however to permit the unfolding of the bottom to be effected so completely or effectually that it may be flattened out over its entire area by merely fiipidmer patent is bottom, and as a result the bottom is never absolutely fiat but bulges outwardly more or less on converging lines, the creasing or scoring of the bag determining the shape of the bottom and promoting the opening thereof, and also contributing materially to the production of a series of flat areas in the bottom which may be pressed and held to lie in approximately the sameflat plane. But in opening the bag the creased bottom is normally distended to such an extent that when an attempt is made to seat the bag in an upright position on its bottom the bag will tilt at an angle and fall on its side due to the unevenness or angularity of the bottom and its resiliency or springy qualities and makeup. Toovercome these objectionablefeatures I construct the bottom of the bag as hereinafter shown and described in detail,

whereb the bottom may be-caused to buckle 7 inward-y in or after opening the bag to permit the bag to be seated in a stable upright position on its bottom corner edges in lieu of its entire bottom area, preparatory to receiving the goods and being filled. I also 7 form the ends of the bag in a particular Way to promote effective sealing of the bottom and less resistance to the opening of the bag at its upper end and to the unfolding and buckling I of the bottom, all as hereinafter described and more particularly pointed out in the claims.

In the drawings hereto annexed Figs. 1 and 2 are elevations of the obverse and reverse sides of a plicated tube from which my improved bag is made, and Fig. 3 is an end elevation of the same tube. Fig. 4 is an elevation of the tube unfolded and flattened out, the parallel lines intermediate the longitudinal side edges of the sheet representing the fold lines or creases which produce the plaits or bellows folds. Fig. 5 is an elevation of the obverse side of a completed bag in its flat state, andFig. 6 a similar view of the reverse or rear side. Fig. 7 is a sectional view of the bag on line-77 of Fig. 6, each ply of the paper being shown as a single line and the plies being separated to avoid dis- I tortion and deceptive delineation. Figs. 8 and 9 are similar sectional views longitudi- 1 nally of the bag, online 88 and 9Y9, respectively, of Fig. 5. Fig. is a side view of the bag opened to that degree or extent as easily obtained by flipping the bag and filling it with air. Fig. 11 is an edge elevation and Fig. 12 a bottom View of the bag as opened and shown in Fig. 10. Fig. 13 is a sectional view vertically of the bag showing the bottom as dished or buckled inwardly and seated at its bottom edges upon a flat surface, and Fig. 14 is a corresponding sectional view of thebottom part of the bag in a plane at right angles to Fig. 13. Fig.

15 is a perspective View of the bag fully opened and seated upon a table.

Now reverting to Figs. 1 to 4, the bag is made'of a sheet of paper 2 which is folded lengthwise on parallel lines 3 to provide a plicated or bellows shaped tube A as shown in Fig. 3. The cross sectional shape of this tube is as commonly employed, but instead of severing the tube stock transversely as customarily I divide the same with a serrated cutter in such a manner that each side fold or plait 4 and 5 between the front and

rear walls

6 and 7 of the tube will have a tri angular portion thereof exposed at each end of the tube. As a result the end of the tube which is to be folded back upon itself to form a bottom closure, may be provided with paste or an adhesive the full width of the tube, including the ends of both of the plaits or folds at each side of the tube where the

triangular portions

8 and 9 are exposed, see Fig. 2. In severing the tube in the offset way as shown the line of severance of one plait at each side of'the tube is parallel with the transverse lineof severance of the main walls of the tube, and the line of-severance' of the companion plait is diagonally from the folded outer edge to the inner folded edge of the plaits. .The cutting of the plaits on such diagonal lines also removes a triangular section from one ply in the finished bottom ly across the middle portion of the tube and then on sloping lines 1111 across the plaited sides of the tube. In effect the fold line is akin to a curved line, which may be used if desired, or the fold line may be in the form of an obtuse angle which the present showing of fold line closely resembles. In folding the tube end insuch amanner a closed bottom is produced which may be easily buckled inwardly after the, bag has been opened and the bottom unfolded. The purpose of that is to project the main area of the unfolded bottom'apart from the surface upon which the bag is to be seated and to providestraight linear resting edges only .walls also act with bracing effect on the side walls of the bag at the bottom corners. The dimensions of the bottom and the production of a rectangular or square sided'bottom is definitely fixed by creasing or scoring the closed end of the flat tube on a straight line 14 transversely of the body of the plicated tube and also on straight lines 1515 diagonally of the plaited sides across its end closure folds. Such scoringis not in itself novel or new as explained herein but is desirable because the bottom will unfold readily on definite rectangular lines and open more easily by dipping and filling-the bag with airf The creases or folds across the bottom are also. preferably soft folds, and

the longitudinal folds which produce the.

plicated sides of thebag are also preferably soft folds to promote easy opening and unfolding movements. It is also desirable that the mouth of the bag open fully and quickly in the initial sweeps of the bag through the air by the operator, it being understood that the bag is grasped between the thumb and forefinger centrally of the exposed flap at the upper or open end of the bag. Accordingly. :I provide a crease or break line 16 transversely of the flattened tube or body of the bag near its open end so that the walls in this end portion of the bag will have a tendency to gap open when the longer flap is gripped and held preparatory to imparting a sweeping airfilling movement to the bag. Thus the bag will open instantly and freely and the bottom will be distended on the rectangular lines given to it by the creases and the plicated sides of the bag will be unfolded fully and to such an extent at or near the bottom that a part thereof will bulge outwardly on angular lines as indicated in Figs. 10 to 12. It is not contended that the bottom flattens out completely in the preliminary opening'movement given to the bag as that is not the case in the present bag or in the creased bag such as heretofore made and known. The bottom is only partially unfolded, but by creasing the bag and making a fold across the'bottom on an arc. curve, or the acute angular lines shown the bottom may be readily opened and then easily buckled inward or dished.

Thence the buckling may be effected by a light pressure of one finger, or the bag may be held at its open end and the converging bottom placed at rest against a raised object or the corner edge of a counter or other object and then by merely pressing the bag downward the bottom will flatten out completely and a slight continuing pressure will then cause the bottom to buckle inwardly due to either the pressure as applied or to the inherent spring-like qualities in the paper. The bag will then stand evenly in an open upright position on the angular corners bordering all four sides of the bottom so that it may be easily filled as illustrated in Fig. 15. Inasmuch as an irregular or bent fold line is produced transversely of the plicated tube .in closing the end thereof, it -follows that when the end flap is folded back upon the body the flap or folded part will wrinkle or gather slightly,and therefore I prefer to gather or tuck this stock in a definite place or places. In the bag shown in the drawings the gathered material or tucks 17 are in the region of and substantially parallel with the inner fold line of the side plications. In producing the main fold line for the bottom it may be made on a curved line but preferably it is made on straight lines which are angularly related and which follow a curved line, and these straight lines meet preferably where the diagonal creases and the inner fold lines of the plicated sides of the tube intersect. In that case the tucks 17 for the reverted part or closure flap 18 of the bottom will extend from the intersection of the angular fold and crease lines above referred to on lines substantially parallel with the inner fold lines of the plicated sides of .the tube. In folding the bottom end of the tube on an irregular line or convexly as stated, a surplus of materials is provided in the areas which form the ultimate bottom of the bag. As creased and folded the area is not a true rectangle .but it is approximately rectangular. For that reason the bottom may be dished or buckled inwardly to permit the bag to be seated solely at the border or bottom corner edgesof the bag when opened. In view of the fact that the bottom fold is made by, simply doubling back the stock upon itself, which places all of the folded material or plies on one side of the bag, I crease the tube from the opposite or obverse side so that all the depressions or grooves are on the obverse face and the raised or ribbed portions are placed entirely on the flap side of the bag. The purpose of this simple expedient, and the use of a plain crease, corresponding in cross, section to a single shallow V-shaped depression, is to reduce the resistance of the greater number of plies or thicker portion in the flap side of the bag and to promote a freer and fuller opening of the bag when it is dipped through the air.

What I claim, is: 1. A paper bag having plicated side walls,

including an end portion whichcis folded and pasted back upon itself to form a bottom closure, the fold line for said bottom closure being offset relatively to a straight line transversely of the bag to permit the bottom of the bag to buckle inwardly when the bag is opened and to provide spaced restportions for the bag.

2. A paper bag having plicated sides and a reverted end forming a closure and bottom,

the closed endv portion of the bag being creased transversely and diagonally to permit the bottom to unfold into a rectan ular shape, and the fold line for the reverte end of the bag being offset at its middle'relative ly to a straight line transversely of the bag to provide a slight surplus of stock in the bottom which will permit the bottom to be dished inwardly in opening the bag and thereby permit the bag to be seated upon the border edges of said bottom.

3. A paper bag formed ofa. plicated tube having-one end folded back upon itself, and secured thereto by an adhesive to form a closed bottom, the folded bottom area of the tube being creased transversely and also diagonally at its corners, to permit easy unfold= ing of the bottom and to produce a. rectangular bottom when unfolded, the area of said bottom as creased and folded having a slight excess of stock to prevent the bottom from lying absolutely fiat when opened and to permit it to be buckled inwardly to provide separate border rests for the bag. 7

4. A paper bag made of plicated tubing having one end folded and secured upon itself on a convex line, the folded overlapping material being I gathered at isolated places,

Whereby when said bag is opened the-bottom may be dished inwardly to support the bag on the edges bordering the unfolded bottom. I I

between the plicated sides'and thence on slanting lines toward the opposite end of the tube to the outer side edges of the plicated sides, the end flap being gathered in the region of the inner fold lines of the plicated portions of the tube, and the body of the tube jacent the folded flap and also creased di-. agonally from the side edges of the tube to being creased transversely its full width adthe junoture of the straight and slanting fold lines. a

7. A paper bag made of plicated tubing which is sealed at one end and formed With a bottom area approximating a rectangle, said bottom having surplus stock in its middle portion to permit said bottom to be dished inwardly when said tube is fully opened.

In testimony whereof I afiix my signature. I

' DANIEL 'APPEL.