US1612022A - Bag fabric - Google Patents

Description

Dec:a 2% 1926. v 3,632,4122 J. H. HOWARTH BAG FABRIC Original Filed D90. 50, 1924 ljqgl.

Patented Dec. 28, 1926.

UNITED STATES PATENT OFFIC JOHN HENRY HOWARTH, OF LANETT, ALABAMA, ASSIGNOR TO WEST POINT MANU- FAGTUBING G0., 015 LANG-DALE, ALABAMA, A CORPORATION OF ALABAMA.

BAG FABRIC.

Original application filedmecember 30, 1924, Serial No. 758,821. Divided and this application filed May This invention relates to fabrics, more particularly to woven bag fabrics, and is a division of a co-pending application, Serial N o. 7 58,821, filed Dec. 30, 1924.

An object of the invention is to provide a fabric having a plurality of series of tubular bag sections separated by a longitudinal portion forming the bag bottoms, and by transversely extending port-ions which separate the sections. The tubular sections are open at the fabric edges to form the bag mouths, and the fabric is provided at each edge with a selvage whereby each section, as woven, constitutes a finished'bag.

Itis broadly old in the art to provide a bag fabric of this general character, as is illustrated, for example, in the patent to Grauwiler, 264,526, Sept. 19, 1882. The present invention, however, marks a distinct improvement over the fabric of this patent in the provision of sclvage edges which eliminatc the necessity for hems of tubular construction or otherwise formed, and also in,

the formation of the longitudinally extending separating strip between the two bag sections as will be described in detail.

In the accompanying drawings there is shown one embodiment of the invention, and in these drawings:

Figure 1 is a diagrammatic face view of the fabric. I

Figure 2 is a longitudinal sectional view on the line 2-2 of Figure l. I

Figure 3 is a cross sectional view along the line 33 of Figure 1, illustrating the weave of the central division strip, and

Figure 1 is a transverse sectional view on the line 4-4 of Figure 1.

Referring to the drawings in detail, indicates tubular bag sections arranged in two parallel series which are separated by an intermediate longitudinal portion 11 of different weave, and which forms the closed bottoms of the bag sections. At the edges of the fabric, the tubular sections are open (Figure 4) to form bag months 12, and each layer is provided with a selvage 13, where by the bag may be completely woven in the loom, and it is unnecessary to hem or otherwise form the bag mouths to prevent ravelling. The'several sections are separated by transverse portions 14;, which extend entirelyacross the fabric and are of different weave center in a single shuttle Serial No. 27,827.

from the tubular sections. Preferably, both the transverse portions 14 and the longitudinal portion 11 are of tape-like formation which is obtained by uniting the warps of the upper and lower plies of the tubular sections. The transverse portions 14 will notbe described in detail, since they may be of any ordinary formation, but referring to the longitudinal division strip 11 (Figure 3), it will be noted that the same has an intermediate portion 11 which is more loosely woven than the remainder, and in which the warps are more widely spaced. That is to say, the portion 11 has at each side of the intermediate zone 11' more closely woven sections 11 which constitute the bag bottoms, and the loosely woven zone serves as a division line along which the two series of bag sections may be separated in the loom or after the fabric has been removed from the loom.

This fabric is preferably woven in the loom of my copending application, above referred to, which is provided with two sets of four harnesses arranged side by side, whereby the weft threads may cross at the center of the fabric within the longitudinal portion 11. In Figure 3, the cross of the weft threads is illustrated. At each side of the central portion or strip 11, the fabric is formed into upper and lower plies 15-, 16. It will be noted that the second and fourth picks 17, 18, remain in the lower and upper plies respectively. The first pick 19 is in diflerent plies at opposite sides of the center stri 11, and the third pick 20, likewise crosses from one ply to the other at opposite sides of the longitudinal dividing portion 11. By this crossing the weave, the fabric is closed at its loom, and thereby there is provided the fabric having two parallel series of bag sections with the mouths of the section open at the sides of the fabric.

Obviously,- changes may be made in the particular weave Withoutdeparting from the invention which is defined in the follor. ing claim.

11 claim:

As a new article of manufacture, a bag fabric comprising two parallel series of-tubular bag sections, both sides of the fabric being open-to form the bag mouths, transversely disposed portions of different weave separating said sections, and a longitudipart provided with Warp threads which are nally extending centrally disposed section of spaced apart a greater distance than the different Weave separating said two series, Warp threads of said tape portions whereby 10 said longitudinally extending section being to provide a division line.

woven to form two spaced tape portions In testimony whereof I have hereunto set which constitute the bag bot-toms, said tape my hand.

portions being separated by an intermediate JOHN HENRY HOWVARTH.

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