FABRIC FOR UPHOLSTERY PURPOSES.

The object of this invention is to produce a firm, solid,

dust-resisting, and durable woven cloth, composed, preferably,

entirely of cotton, but it may be of a cotton warp combined with a

linen or other weft, and is particularly applicable for covering the

seats and cushions of railway and other carriages, for upholstering

purposes, for bed ticking, and for various other uses. To effect this

object, a cotton warp and, preferably, a cotton weft also are

employed, or a linen, worsted, or other weft may be used. Both the

yarns for warp and weft may be either dull or polished, according to

the appearance and finish of cloth desired. The fabric is woven in a

plain loom, and the ends are drawn through say eight heald shafts, but

four, sixteen, or thirty-two heald shafts might be employed. When

eight heald shafts are employed, the warp is drawn as follows: The 1st

warp end in the first heald shaft, the 2d warp end in the second heald

shaft, and so on, the remaining six warp ends being drawn in, in

consecutive order, through the remaining six heald shafts; the 9th

warp end is drawn in through the first heald shaft, and so on, the

drawing in of the other ends being repeated as above. The order of the

shedding is as follows: 1st change. The 1st and 3d heald shafts fall,

the rest remaining up. 2d change. The 5th and 7th shafts fall, and the

1st and 3d rise. 3d change. The 2d and 4th shafts fall, and the 5th

and 7th rise. 4th change. The 6th and 8th shafts fall, and the 2d and

4th shafts rise. The result is that each weft thread, a, passes under

six warp threads, b, and over two warp threads, in the manner

illustrated by the accompanying diagram. In drawing in, when four

heald shafts are employed, the 1st warp end is drawn in through the

1st heald shaft, the 2d through the 2d shaft, the 3d through the 1st,

the 4th through the 2d, the 5th through the 3d, the 6th through the

4th, the 7th through the 3d, and 8th through the 4th shaft, and

repeating with the 9th end through the 1st shaft. In shedding, the 1st

heald shaft is lowered, then the 3d, then the 2d, and then 4th. The

result, in this case, is still the same, viz., that each weft thread

passes under six warp ends and over two warp ends. Although a cotton

warp is spoken of in some cases, worsted or other yarn can be added to

the cotton warp to obtain a variation in the pattern or

design.--_Jour. of Fabrics._

[Illustration]

* * * * *

Scientific American Supplement, No. 794, March 21, 1891 · 第 20 / 71 题