US2061375A - Bag or sack - Google Patents

Description

Patented Nov. 17, 1936 l UNITED STATES PATE-NT OFFICE l 2,061,375 BAG on SACK Joseph D. Gramer, Goshen, Ind., assignor to The Chase Bag Company, New York, N. Y., a corporation of YDelaware Application October 6, 1934, Serial No. 747,184

3 Claims. (Cl. 150-1) My invention relates to bags or 'sacks and is This cement film reenforces the weakened areasy an improvement pertaining more particularly to and has a shock-absorbing and dampening aclined heavy duty bags in which the body of the vtion so that certain stresses and shocks are abbagV is `composed of an outer covering and an sorbed, and breakage of the lining at the folds 5 inner preferably air-tight and liquid tight one prevented. 5 way stretchable lining. The outer Vcovering of Preferably the cement film or coating is apsuch bags is ordinarilyv made of textile fabric plied by spreading the cementitious liquid upon such as burlap to withstand rough handling. the lining and then covering the same with a The inner lining consists of a sheet or sheets of paper strip or a layer of powdered material so paper or other similar material, creped'transas to permit of -continuous manufacturing op- 10 versely to yield without cracking, when the bag erations without danger of .cementing the inner is folded or otherwise strained, and while ordiwalls of the lining together. However except for narily connected to the outer covering by a layer convenience Vin manufacturing and to facilitate of Waterproof binder such as asphaltum, the liner stacking the bags before the cement has dried,

may be loosely arranged within the fabric backthe use of powder or other covering for the 15 ing. latex is not necessary.

Bags ofthe kind referred to are made from The novel features that I consider charactube sections of this composite or multi-ply materistic of my invention are set forth with parterial, formed in tubing machines of old and ticularity in the appended claims. The invenwell known construction. These machines emtion itself, however will best be understood from 20 body tube-forming devices through which the the following description of a specific embodimaterial is drawn under a pulling tension by ment when read in connection with the accommeans of superposed draw rollers which fricpanying drawing, in which tionally engage the formed tube for further ad- Figure 1 is a plan view of a paper-lined burvancement and also to flatten same. This conlap bag having the reenforcing latex film applied 25 ventional mode of making the bags seems to to the folded areas of the paper lining, the difweaken the folded areas of the liner as indicated ferent layers of the outer coveringand inner 1inby the high percentage of liners which rupture ing being partly broken away to disclose the at these particular areas. It has been proposed construction of the bag, its seam and the latex to overcome the above defects by employing so film.

called double stretch liners, made from paper Figure 2 is an enlarged transversal sectional creped or wrinkled in two substantially rectanguview on line 2--2 of Figure l, the bag being larly related directions in contradistinction to broken away intermediate its width. paper liners such as described as being creped Figure 3 is an enlarged longitudinal sectional transversely to permit of stretching longitudi- View on line 3-3 of Figure 2; and 35 nally of the bag. However the results obtained Figure 4 is an enlarged fragmentary sectional with so-called double stretch liners likewise have view similar to Figure 3 of a bag in whichrthe not been satisfactory. reenforcing of the bent area of the lining is.v ef- Having in mind the above defects in bags of fected by means of an uncovered yielding cemthe type referred to, it is the primary object of entitous film. 40

my invention to provide a paper-lined burlap In the preferred embodiment of my invention bag with a lining strengthened and reenforced shown in Figures 1 to 3 of the drawing, the bag 2 at its bent or folded area-s, so as to obviate or is formed from a composite sheet including an materially reduce the high percentage of breakouter layer of woven fabric 3, such as burlap. age of these areas. This outer layer carries an inner lining member 45 The reenforced areas of the lining must of 4 fastened thereto by means of a layer of watercourse yield to stresses incident to rough hanproof binder 5. The liner 4 preferably consists dling, etcl and therefore it is another object of of two smooth sheets of tough thin preferably my invention to provide yieldable or resilient retransversely creped paper 6, secured together by enforcing means capable of stretching with the means of an interposed layer of waterproof 50 folded areas of the lining. binder 1, such as asphaltum.

To obtain these objects, I have devised a paper- The web of material, comprising the outer layer lined burlap bag inwhich the folded areas of the 3 and the lining member 4 secured thereto, is lining are covered with a film of a yielding or folded at 8 and 9 and joined by an overlapping elastic cement, such as latex or processed rubber. seam I0 arranged in the middle of the seamed 55 side wall I I of the bag. A very tight seam is assured by overlapping the edges I2, I2 of the outer fabric layer 3 with respect to each other, and by overlapping the edges I4, I4' of the lining member, all as clearly disclosed in Figures 1 and 2. These overlapping portions are pasted together by any suitable adhesive such as waterproof binder 5. To facilitate the overlapping of the layer 3 and the lining member 4, the layer 3 and the lining member 4 are laterally offset with respect to each other, that is, one edge of the fabric extends beyond the corresponding edge of the liner 4 to form an unlined marginal portion I5. It will also be noted that one of the paper sheets 6, preferably the outer one, is somewhat wider than its companion sheet, and is offset transversely with relation thereto thus providing extended portions or strips II on the respective sheets which project beyond the corresponding edges I 6 of the other sheets and beyond the edges of the binder between these sheets. The thickness of the seam is thusv reduced and a substantially air-tight and water-tight seal is had. The extended edges I'I and other overlapping parts are pasted to the opposing parts by any suitable waterproof adhesive of sufficient strength.

The bottom edge of the thusformed tube is seamed by a binding strip I8, consisting of two layers of woven fabric I9, 20 secured to each other by means of a waterproof binder 2I, such as an asphaltic material. Preferably as shown, a sheet of tough paper 22 is inserted between the outerfabric layer I9 and the binder 2I to prevent the latter from being pressed through the texture of the outer layer I9, the paper sheet 22 being suitably pasted or otherwise secured to the layer I9. The bag when filledi is closed at its top by a binding strip I8 as indicated in dotted lines in Figure l.

The folded or bent portions 23 of the lining members 4 (only one of which is shown) are provided with thin, yielding cementitious films 24, which are preferably formed by spreading a solution of latex, processed rubber or other elastic cementitious material over and adjacent to the folded areas. 'I'he films extend from the top to the bottom of the bag, and are preferably protected by strips of preferably transversely creped paper 25, to permit of continuous manufacturing of the tube sections in a tubing machine of common construction, without danger of the opposing areas 23 sticking to each other. Numerous comparative tests have proven that the paper strips 25, do not fortify the folded areas against breakage to any appreciable degree, and consequently any suitable covering medium for the resilient film may be employed, such as talcum or other powdered material.

The films 24 yield under the abrupt and excessive stresses to which the liner is subjected, and take up part of these stresses by their yielding and absorbing action. This action may best be compared with that of a shock absorber.

As the creped paper strips 25 have little or no reenforcing effect on the areas 23 it is obvious that these strips can readily be omitted without danger of liner breakage or manufacturing difficulties, if means is provided for quickly drying the films, or otherwise preventing sticking of the lining members, at the reenforced areas 23. Such a simplified structure is disclosed in Figure 4 of the drawing, in which the latex film 24 is openly exposed.

Air and water-tight lined burlap bags reenforced in the manner described will' stand eX- cessive wear and abuse even though the sheets 6 of the lining are creped and stretchable in one direction only, and have also proven to be far superior to bags in which the lining isV creped and/or folded or corrugated in two directions.

Although I have shown and described certain specific embodiments of my invention, I am fully aware that many modifications thereof are possible. My invention, therefore, is not to be restricted except insofar as is necessitated by the prior art and by the spirit of the appended claims.

Having thus described my invention, what I claim is:

l. In a flat bag, a creped paper lining folded at the edges of the bag, thin films of latex extending lengthwise of the folded areas at a rightangle to the crepes from top to the bottom of said lining and creped paper strips for covering and protecting said film, said strips being held in place by the adhesive action of said films.

2. A doubled walled bag formed of textile fabric and creped paper lining secured thereto by a waterproof binder uniting said fabric and paper over their entire opposed surfaces, folded areas in said bag, and thin films of an elastic adhesive material lengthwise of the folds of said paper lining for reenforcing the folded areas thereof, and protective means covering said elastic adhesive material.

3. A double walled bag formed of textile fabric, and a creped paper lining secured thereto by a waterproof binder uniting said fabric and paper over their entire opposed surfaces, thin films of latex lengthwise of the folds of saidpaper lining and at a right-angle to the crepes thereof for reenforcing the folded areas of said lining, and means for covering said films.

JOSEPH D. CRAMER.

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