US1772945A

US1772945A - Production of narrow curvilinear elastic fabric

Info

Publication number: US1772945A
Application number: US343672A
Authority: US
Inventors: Charles T Hawley
Original assignee: Moore Fab Co
Current assignee: Moore Fab Co; MOORE FABRIC Co
Priority date: 1929-03-01
Filing date: 1929-03-01
Publication date: 1930-08-12
Anticipated expiration: 1947-08-12

Description

Aug. 12, 1930. T AWL Y 1,772,945

PRODUCTION OF NARROW CURVILINEAR ELASTIC FABRIC Filed March 1 1929 Fatenled Ange l2, ihfail GHARLES I. HAWLEY, F EfiLDilN, MASSACHUSETTS, ASSIGNOR 'llO MOORE FABRIC GOM'PANY, 0F EAWTUCKET, EEODE ISLAND, A CQR?QRATION 9F EEGDE ISLAND PRGDUCTIGH OF NAREORV CURVILENEAR ELASTIC FABRIC Application filed March 1,

This invention relates to the weaving of curvilinear elastic fabric and relates more particularly to the production of such fabric in a narrow Ware loom.

It is the general object of my invention to provide improved mechanism for weaving curvilinear elastic fabric and an improved method of operation thereof by which such fabric may be rapidly and economically pro- 10 duced and by which it may be provided with an inherent and permanent curvilinear set.

My invention further relates to arrangements and combinations of partsvwhich will be hereinafter described and more particu larly pointed out in the appended claims.

One form of mechanism adapted for the carrying out of my invention is shown in the drawings, in which thefigure is a perspective view of parts of a narrow ware loom on which curvilinear elastic fabric may be woven by my improved process.

Referring to the drawing, which is more or less diagrammatic, l have shown such parts of a narrow ware loom as are necessary to disclose and explain my invention. 1

I have shown a breast beam 10, and a lay 11 provided with guide blocks 12 for a narrow ware shuttle (not shown) and with a reed 13 which is preferably graduated, with the dents placed more closely together to ward the left hand end, as viewed in the drawing.

1 have also shown a plurality of harnesses 15, and a warp guide-roll 17 positioned substantially at the rear of the harnesses. Elastic warp threads W are supplied from a cylindrical warp beam 20, rotatably mounted and provided with a suitable friction device 22,

Non-elastic binder warps B are supplied from a tapered or conical warp beam 30, also rotatabiy mounted and provided with a friction device 82. lhe warp threads W and B pass from the warp beams over a guide-bar 34 and through an assembly reed 35 to the guide-roll 17. l The woven fabric F passes over a guideroll on the breast-beam it which guide- 5 roll may be tapered as indicated the drawing. The fabric F then passes around a 1923. Serial No. 343,672.

cylindrical take up roll and a cylindrical guide-roll 51 and is wound up on a conical or tapered cloth roll 52. The roll 50 is mounted on a shaft 5a, which is positively driven.

The usual mechanism is provided for raising and lowering the harnesses and for reciprocating the shuttle.

Production of curvilinear elastic fabric by the mechanism described is accomplished as follows As the weaving progresses, the woven tabric is drawn downward at a substantially uniform rate throughout its width by the cylindrical take-up roll 50, and the rubber warp threads W are supplied at a uniform rate of feed and under substantially uniform tension or retardation from the cylindrical warp beam 20. Y

'lhe binder warps B are drawn ofi of the tapered or conical warp beam 30 against the retarding effect of the friction device 32. Obviousl the warp threads at the. larger end. of t e warp beam 30 will be fed more rapidly from the revolving warp beam than the threads atthe smaller end, and will thus be under less tension as they are presented at the weaving point. The tight binder warps from the small and or the beam 30 will be bound closely about the elastic war threads W with which they are associate while the slack binder warps from the large end of the warp beam 30 will be more loosely bound about their associated elastic warp threads W,

It is the custom to weave all elastic warp threads in suchiabric in stretched or elongated condition and it is found that the more loosely the elastic warp threads W are bound into the fabric, the greater will be their shrinkage or contractiomwhen released from the weaving tension. Accordingly, the narrow fabric produced as above described will assume a curvilinear set when freed from the take-up roll 50, with the tight binder threads from the small end of the beam 30 disposed at the long edge of the curvilinear fabric.

This curvilinear effect will be produced to a certain extent if the reed 13 is uniformly graduated throughout its length, but the ct fee is iaterially increased i a raduated is used by which the arp threads are crowded toward that edge of the fabric where the more strongly tensioned binder warp threads are found. The crowding of the warp threads laterally still further prevents contraction of the threads when the fabric is released.

This method of weaving a curvilinear elastic fabric has been found very satisfactory in use and the fabric is produced with substantially the same speed and economy as straight fabric of similar width.

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 s 1. In a narrow ware loom, in combination, a single cylindrical warp beam for elastic warp threads, a single tapered warp beam for non-elastic binder warp threads, weaving mechanism, and a'take-up device by which the entire width of fabric is taken up at sub stantially uniformvspeed with the elastic warp threads under substantially uniform tension and with the binder warps decreasing intension toward the larger end of the tapered warp beam, whereby a curvilinear set is given to said fabric.

2. In a narrow ware loom, in combination, means to supply elastic warp threads at a uniform rate and under uniform tension, means to supply binder warps at a rate relatively decreasing toward one edge of the fabric, weaving mechanism, and means to take up the woven fabric at a uniform rate throughout its width.

3. In a narrow ware loom, in combination, means to supply elastic warp threads at a uniform rate and under tension, means to crowd the warp threads more closely together toward one edge of the fabric, means to supply binder warps at a rate relatively decreasing toward the more closely crowded edge of the fabric, weaving mechanism, and means to take up the woven fabric at a uni form rate throughout its width.

4. In a narrow ware loom, a' single cylindrical warp beam to supply elastic warp to a piece of curvilinear elastic fabric, a single tapered warp beam to supply non-elastic binder warps for said piece of fabric, weaving mechanism, and a cylindrical take-up roll for the woven fabric, whereby the elastic warps will be more closely bound into the fabric at the edge thereof corresponding to the smaller end of said tapered warp beam.

5. In a narrow ware loom, a single cylindrical warp beam to supply elastic warp to a piece of curvilinear elastic fabric, a single tapered warp beam to supply nonelastic binder warps for said piece of fabric, means to crowd the warp threadsmore closely together toward the smaller end of tapered beam, weaving mechanism, and a cylin= drical take-u roll for the woven fabric whereby the e astic warps will be more closely wound into the fabric at the ed e thereof corresponding to the smaller en of said tapered warp beam.

6. In a narrow ware loom, means to supply uniform lengths of elastic warp threads to a piece of fabric, means to supply binder warp threads progressively increasing in length toward one edge of the fabric, weaving mechanism, and take-up mechanism acting uniformly on all parts of the fabric.

7. In a narrow ware loom, means to supply uniform len the of elastic warp threads .to a piece of 'abric, means to supply binder warp threads in lengths progressively increasing toward one edge of the fabric, means to crowd the warp threads together toward the edge where the shorter lengths of nonelastic warp threads are supplied, weaving mechanism, and take-up mechanism acting uniformly on all parts of the fabric.

8. The method of weaving a piece of narrow curvilinear elastic fabric which consists in supplying elastic warp threads at a uni form rate of feed and under substantially uniform tension throughout the width of the fabric, providing non-elastic binder warp threads at a rate of feed gradually increasing toward one edge of said piece of fabric, inserting filling in said fabric, and taking up said fabric at a uniform rate throughout its width.

9. The method of weaving a piece of narrow curvilinear elastic fabric which consists in supplying elastic warp threads at a uniform rate of feed and under substantially uniform tension throughout the width of the fabric, providing non-elastic binder warp threads at a rate of feed gradually increasing toward one edge of said piece of fabric, crowding the warp threads toward the edge of the fabric where the binder warps have the less feed, inserting filling in said fabric, and taking up said fabric at a uniform .rate throughout its width.

In testimony whereof I have hereunto affixed my signature.

CHARLES 'll. HAWLEY.