US1459547A - Elastic woven fabric - Google Patents

Description

Patented .fune T9, i923.

SATS

y attesti rar reca.

GEORGE C. MOORE AND THOMAS F. MOORE, F WESTERLY, RHODE TSLAND.

ELASTJIC WOVEN FABRIC.

Application med august 24.', 1922.' serial No. 584,044.'

To all whom it may concern.'

Be it known that we, GEORGE C, MOORE and THOMAS F. Moons, citizens of the United States, residing at Westerly, in the county of Washington, State of Rhode Island, have invented a certain new and useful Improvement in Elastic Woven Fabrics, of which the following is a specification, reference being had therein to the accompanying drawings.

Our invention is applicable in the production of elastic Woven fabrics containing wound or covered rubber strands.

An elastic woven fabric embodying our invention has novel texture, special characteristics, and a reticulated honeycomb surface effect in comparatively high relief due to diagonal raised wales extending oppositely in transverse directions, intersecting one another, and with intermediate hollows or depressions.

The nature, etc., of our novel and improved elastic woven fabric are substantially indicated in the drawings in which latter,-

Fig. 1 is a face view of a portion of the said fabric in its normal contracted state. Tn this view the ends of the different threads are supposed to have been trimmed away.

close to the edges of the closely woven fabric.

fabric in distended condition but with a.V

sli ht modificationvin the wefting.

ig. 3 is a diagram on the order of a View in section on line 3, 3, of Fig. 2.

Fig. 4 is a diagram illustrating the weave of the fabric.

Our fabric is composed, essentially, of pairs of heavy cordwarps constituted by wound or covered elastic strands which are indicated at 1, 1, Figs 2, 3 and 4; pairs 0f fine warp threads 2, 2, each such pair com# prising either two individual threads as in Figs. 2 and 4 of the drawings or two groups of threads; and weft or filling 3,- 3a, etc., y interwoven with the two sets'ofwarps. The

covering or wrapping of the respective rubber. strands is indicated at la. The wound or covered rubber strands l, 1, fine Warp threads 2, and weft or filling 3, 3a etc., are

interwoven substantially as indicated in' Figs. 3 and 4; namely The two fine warpthreads or groups of warp-threads 2, `2,

vshown in Fig. 4, but only one in each of Figs. 2l and 3. Then the ,two fine warpthreads or groupsof warp-threads appearl at the upper surface o fthe fabric, above one or more picks 3a 3a, of weft o r filling yoverl ing the wound or covered elastic strands, (lt'wo picks 3a 3a, being shown in Fig. 4, but only one in Figs. 2 and 3), and diverge from leach other in opposite directions so that they cross diagonally in opposite .directions laterally to the outer sides of the two elastic strands. Then the two fine warp-threads or groups of warp-threads appear at the under face of the fabric, at the said lopposite sides of the elastic strands, and are ound at the said under surface by one or more picks 3b, 3b, of weft or filling. The two fine warp-threads then cross back toward -each other at the upper surface of the fabric,

converging toward each other over the pair of elasticstrands andalso over oneor more picks 3, 3", of weft or filling overlying said.

strands. This completes one repeat of the Weave, inthe direction of the length of the fabric. yThen the two fine warp-threads pass down together between the two elastic strands, and are bound at the under surface of the fabric by oneor morevpi'cks 3, 3, ofv

weft or filling, as before, and so on ad innitum. y

It will of course be understood that in Fig.,4, and also in Fig. 3,the various threads, etc., have been spread widely apart for convenience in illustrating what has just been described. Fi 2 shows the woven fabric, on an enlarge scale, in its longitudinally extended state, with the rubber strandsv stretched lengthwise, and with the warp and weft-threads correspondingly spread but not to the extent of separating the picks of weft or filling from one another. As will be apparent in Fig. 2, as Vthe successive picks of weft or filling are' beaten up inthe progress of the weaving they are slld forward along the wound or covered 'elastic strands so asto produce acl'osely woven fabric structure.

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ln this extended state of the fabric, on one transverse line portions of the respect-ive pairs of elastic strands 1, l, are seen, alternated with those portions of pick 3 of weft or filling which overlie and are hcld up by the pairs of fine warp- threads 2, 2, between the successive pairs of elastic strands. 0n the next adjacent transverse line the pick 3a of weft or filling appears, overlaid by the diverging portions ofy the pairs olf fine warp-uy threads2, 2. '0n the next adjacent transverse line, portions of the elastic strands are seen, alternated with those portions of pick 3b of weft or filling 'which overlie andV are held up by the spread apart portions of the said pairs of fine Warp-threads. Aswill be observed the spread apart portions of one pair of the fine warp-threads touch those of the corresponding parts of the pair at either side of such pair. Qn the next adjacent transverse line, the pick 3c appears, overlaid by the converging portions of the pairs of fine warp-threads. The next adjacent transverse line is a repetition of that mentioned first, namely, showing portions of the respective pairs of elastic strands 1, l, alternatedwith those portions of the next pick -3 of weft or filling which overlie and are held up by the pairs of fine warp- threads 2, 2, between the successive pairs of elastic' strands.

As will be apparent from inspection of the drawings, the picks 3", 3, of weft or filling are elevated above the elastic strands l, 1, and the portions of the fine warp- threads 2, 2, which cross laterally back and forth over the said picks also are made prominent. The crossing portions of said fine Warp-threads produce a waviness of the said 'picks in the top plane of the fabric. rlhe curves of the waves alternately tend toward each other in the case of a pick 3L and the adjoining pick 3, as in Fig. 2, and when lthe fabric after being woven assumes its contracted condition as in Fig. 1 the prominences of the curves are pressed together as in said figure. Consequently, the said crossing por-- tions of the fine warp-threads, blending with those portions of 'the picks 3a, 3, which are not covered by such ycrossing portions, join in producing a raised reticulated honeycomb effect observable in the case of the normal fabric as represented in Fig. l.

The described mode of interweaving effects a yery secure locking of the elastic strands against lengthwise creeping. This is4 due to the` fact that each fine warp-thread in crossing from one side to the other of an elastic strand and back again ,loops under one or more picks of weft or filling at each Side of the elastic strand. Thereby, by reason of the loop or noose of the fine warpthread over the elastic strand at two points and under one or more picks of weft or filling between such points, the elastic ing been stretched operates against the weft or filling at the under side of the web to tighten the weft or filling against the line Warp which passes under the same, while in the next repeat the same condition exists and' at 'the same time between the repeats the crossing portion of the fine warp-thread and the picks of weft or filling which intervene between such portion andthe elastic strand are in like manner acted upon by the expanding elastic strand, with the result that close contact and firm engagement of the successive picks of weft or filling with the elastic strands are caused to occur.

A fabric made in accordance with the invention is very serviceable in the production of elastic girdles, surgical bandages, corsetv inserts, and the like, it having marked advantages both in respect of reduced cost of manufacture and otherwise over lthe knitted fabrics heretofore largely used for such purposes, and also over. fabrics of other con-` structions required to have a more or less porous character coupled with an attractive appearance.

A woven fabric embodying the present invention has the characteristic of remaining perfectly flat, and admits of being cut at the required intervals without the tendency to excessive raveling and waste which exists in the case of knit fabrics, and also without the tendency characterizing the latter to roll toward the back of the fabric. The described mode of combining and interweaving the component threads prevents Ithe ends of the elastic strands from creeping into the fabric when the fabric is stretched. A very desirable pattern is obtained. Alsoa fabric which is more porous, and at the saine time firm and flat, than can be obtained by any other method of construction known to me.

What vis claimed as the invention is The described elastic woven fabric composed of warps and wefts or filling in sets comprising a pair of wound or covered elastic strands, a pair of warp-threads,l or a pair of groups thereof, and weft or filling, said fabric having they pair of elastic strands covered at face and back of the fabric by the interwoven weft or filling and warpthreads, with the pair of warp-threads first located between the two elastic strands and bound at" the under face of the fabric by one or moreV picks of weft or filling below the elastic strands, then crossed at the top face of the fabric above one or more-picks of weft or filling overlying the elastic strands, and' diverging from each other in opposite directions to the outer side of the two elastic strands, then bound at the under face of the fabric by weft or filling, and then crossed.y

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vback toward each other at the'upper surface In testimony whereof We ax our signaof the fabric, converging toward each other tures, in presence of two Witnesses. over the pair of elastic strands and also over GEORGE C. MOORE. one or more plcks of weft or lhng and then 5 passing down together between the two elas- THOMAS F' MOORE' tic strands and bound by weft or filling at Witnesses: the under face of the fabric as before, and ELLA LEIPER,

so on. BmNIoEv f: l

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