US1849025A - Elastic fabric - Google Patents

Description

' O. F. NEIDEL ELASTIC FABRIC March 8, 1932.

Filed Aug. 15, 1929 jaw/2W.- O QM Patented Mar. 8, 1932 UNITED STATES PATENT OFFICE OSCAR I.'NEIDEL, OF WESTERLY, RHODE ISLAND, ASSIGNOR TO GEORGE C. MOORE COM- PANY, OF WESTERLY, RHODE ISLAND, A CORPORATION OF RHODE ISLAND ELASTIC FABRIC Application filed August 15, 1929. I Serial No. 386,112.

on them through the incorporation therein of threads or strands of. rubber, manufacturers have made numerous endeavors to secure the rubber threads or strands against relative displacement in the direction of the length thereof. An aim in this connection is to prevent creeping of the rubber threads or strands, and especially of end-portions-thereof, as at the ends of pieces of elastic webbing, or elsewhere in'the webbing in case a rubber thread or strand should be severed by the needle employed for a sewing operation, or should break when extended, as a result of being nicked by the needle or of other cause of weakness.

.plish such object and attain the said aim through, the employment of specially-prepared rubber threads or strands; briefly stated, through the employment of composite elastic cords, each .comprising a plurality of rubber threads or strands, with the component threads or strands individuall furnished with fibrous wrappings, and with the plurality collectively enclosed with a similar covering. Having reference to the drawin s,- Fig. 1 is indicative of a piece 0 webbing containing the invention.

Fig. 2 is a view illustrating one of the composite elastic cords aforesai The rubber threads or strands composing a composite cord are indicated individually at 1, 1, in Figs. 1 and 2. Fig. 2 shows each individual rubber thread or strand spirallyenwrapped with a thread 2. Fig. 2 shows, also, two individually wrapped or covered rubber threads or strands side by side and bound together by an external enclosing fibrous wrapping 3. Fig. 1 shows a webbing 4 in which composite cords on the order of that of Fig. 2 are interwoven with fibrous warp threads and weft or filling.

In Fig. 2 only one thread 2 is shown wrapped around each rubber thread or strand. If preferred, two or more of such threads may be employed upon each rubber thread or strand. The thread 2 upon one rubber thread or strand is shown wrapped around the latter in one direction (to the right) while that upon the other is shown wrapped in the other direction (to the left). This feature of enwrapping the difierent individual rubber threads or strands in different directions is advantageous in some connections, inasmuch as it renders the resultant cord less liable to twist and kink, than one having the individual rubber threads or strands composing a composite elastic cord respectively wound in one and the same direction. However, if preferred, the different individual rubber threads or strands respectively may be wound in one and the same direction.

In Fig. 2 the external enclosing fibrous wrapping 3 is composed of a plurality of threads wound side by side in a single layer. The number of threads comprised in such layer may be greater or less than that shown, and, if found desirable, an additional layer may be applied outsidethe first layer, wound in the direction opposite to that of the first layer. i

My invention combines, with the advantage that is secured through the employment of a plurality of rubber threads or strands in a composite cord, the merit of ensuring more effectually against creeping of the individual rubber threads or strands in the final product. In the case of fabrics in which, as

usual heretofore, elastic cords comprising each a single rubber thread or strand are posite elastic cords composed of a plurality of rubber threads or strands, is that the likelihood of both or all thereof being severed or nicked by a needle is not so great. My invention ensures more effectually against creeping than the various expedients heretofore known, in virtue (l) of the hold of the rimary wrapping 2 upon the individual ruber thread or strand, and (2) of the interengagement of the spiral turns of the embracing external Wrapping 3 With the spiral turns of such primary wrapping.

The invention is applicable in the case of fabrics produced by knitting, braiding, &c., as well as those produced by weaving.

What is claimed as the invention is:

1. An elastic fabric having included in the fabric-construction thereof composite elastic cords, each of such cords comprising a plurality of individual rubber threads respectively enwrapped spirally with covering thread and collectively bound together by an enclosing fibrous wrapping.

2. A composite elastic cord comprising a plurality of individual. rubber threads respectively enwrapped spirally with covering thread and collectively bound together by an enclosing fibrous Wrapping.

OSCAR F. NEIDEL.

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