US1772958A - Method of producing elastic fabric - Google Patents

Description

Aug. 312, 1930 -J. v MOORE METHOD OF PRODUCING ELASTIC FABRIC Original Filed March 1, 1929 1 N V EN TOR. fly? 17700712.

A TTORNEYzS in the appended claims.

Patentecl 12, 1930 UNITED STATES PATENT OFFICE JOHN V. MOORE, OF PAWTUOKE'I, RHODE ISLAN'D, ASSIGNOR TO MOORE FABRIC COM- PANY, OF PAWTUCKET, RHODE ISLAND, A CORPORATION OF RHODE ISLAND METHOD OF TRODUCING ELASTIC FABRIC Original application This is a division of my application, Serial No. 343,662, filed by me March 1, 1929. This invention relates to the production of curvilinear elastic fabric and more particularly to a method of producing relatively narrow elastic fabric, adapted for use in sanitary belts, garters and other similar articles.

It is the object of my invention to provide an improved method and procedure for producing such curvilinear elastic fabric.

My invention further relates to arrangements of operations which willbe hereinafter described and more particularly pointed out A form of mechanism by the use of which my invention may be practiced is shown in the drawings, in which T Fig. 1 is a perspective view of portions of a narrow fabric loom, and

Fig. 2 is a perspective view of a modified warp beam.

Referring portions of a to the drawings, I have "shown narrow fabric loom including a lay 11 having gu ding ciprocated, a reed 13, a plurality of harnesses 1 1, a warp guide-roll 15 at ably mounted above the guide-roll 15. The reed I3 is preferably graduated with the dents more closely together toward the left hand end of the reed as viewedin the draw- Tiroups of elastic Warp threads WV are wound on sectional warp beams 20, mounted for independentrotation' and'separately tensioned by friction devices 22, of which one only is shown. It will be understood, however, that one such device is provided for each warp beam 20.

The warps WV pass an elevated guide-bar 24 and thence to the assembly reed 16,,

Binder warps B a're'wound on a single cylindric al warp beam 30 mounted for separate rotation and separately tensioned/by a frietion device 31.

Thewoven fabric F passes over the breast beam 10 to a conical take-up roll 40, mounted on a shaft 41 and positively driven. A guideroll 42 increases the lap of the fabric F on the the rear of the. harnesses, and an assembly reed 16, prefer-.

from the beams 20 over of the fabric, 'ing of the elastic warps and still further reducing the relative contraction thereof at the be substituted for the straight warp filed March 1, 1929, Serial No. 343,662. Divided and this applicationfiled June 21,

1930. Serial No. 462,845.

take-up roll 40 and the fabric passes from the roll 42 to a conical cloth roll 44. A conical guide r011 46 may be provided on the breast beam 10.

- The method of production of curvilinear elastic fabric by use ofthe mechanism described is as follows:

The woven fabric is drawn downward by the conical take-up roll 40, but the non-elastic binder warp threads B are supplied from the cylindrical warp beam 30. The joint effect is to tension the binder warps increasing towards the large end of the take-up roll 40, leaving the binder warps toward the smaller end relatively slack.

The elastic warp'threads W are preferably woven under relatively heavy but substantially uniform tension, which tension is maintained substantially uniform during the weaving, as the warp beams are mounted to rotate independently and will let off a greater length of warp toward the side of the fabric corresponding to the larger end of the take-up roll 40;

The more tightly the binder warps are tcnsioned, the more firmly they bind the elastic warps. The nore tightly the elastic warps are bound into the fabric, the less they are able to contract when the fabric is released from the tension.

Consequently the edge of the fabric where the binder warps are under greater tension and more tightly the release than the edge of the fabric where the binder warps are relatively slack tensioned. The fabric will thus assume a curvilinear shape,'with the long edge of the fabric towards the larger end of the take-up roll 40.

The results thus far. described could be attained with a reed of uniform spacing, but the curvilinear effect is increased by use of the graduatedtreed 13, which crowds-the warp threads more closely together at the long edge thus increasing the close bindlong edge.

If still further curvature is desired, a slightly tapered warp beam 60 (Fig. 2) may beam 0 woven will be longer upon Y shown in Fig. 1. If the larger end of the warp beam 60 is placed at the right, or toward-the short edge of the woven fabric, the slackness of the binder warps on the short edge will be accentuated and a sharper curvature will be secured.

Claims to the. fabric per se are not made herein, as they form the subject matter of my original application, Ser. No. Claims to the mechanism and specific method claims based on the detailed operation thereof are not made herein, as they form the subject matter of a divisional application, Serial Nor 38,785 filed by me March 25, 1930.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is I tion of contraction from oneedge to th In testimony whereof fixed my signature.

1. The method of weaving curvilinear elastic fabric which consists in supplying elastic warp threads under substantially uniform tension, supplying binder warps, inserting weft and binding the elastic warps more firmly between said binder warps towards one edge of the fabric, thereby restricting the contraction of said elastic warps.

2, The method of weaving curvilinear elastic fabric which consists in supplying rubber warp threads of substantially uniform diameter and under substantially uniform tension, supp lying non-elastic warp threads, inserting weft threads and taking up the woven fabric, and invariably control.- ling the shrinkage of the rubber warp threads after the weft is inserted, whereby greater shrinkage occurs at one edge of the'woven fabric and curvature is effected.

3. The method of weaving curvilinear elastic fabric which consists in supplying rubber warp threads of substantially uniform diameter and under substantially uniform tension, supplying non-elastic warp threads relatively tight at one selvage and relatively loose at the other selvage at the point of weaving, inserting weft threads, and taking up the woven fabric, the non-elastic warp threads variably controlling the shrinkage of the rubber warp threads after the weft is inserted, whereby greater shrinkage occurs at one edge of the fabric and curvature is efiected.

4. The method of weaving curvilinear I progressively increasing e other of the'fabric.

I have hereunto af- JOHN v. MOORE.

CERTIFICATE OF CORREGTION.

Patent No. 1,772,958. Granted August 12, 1930, to

JOHN V. MOORE. v

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, line 34, claim 2, for the word "invariably" read in variably; and that the said Letters Patent should be read with this correction therein that the same may conformv t0 the record of the case in the Patent Office.

Signed and sealed this 21st day of ()ctobcr, A., D. 1930.

M. Moore;

(Seal) Acting Commissioner oi Patents. '7

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