Elastic and non-elastic narrow fabrics : $b and a chapter on narrow fabrics made on knitting machinesBrown, Samuel
History
Elastic and non-elastic narrow fabrics : $b and a chapter on narrow fabrics made on knitting machines
Brown, Samuel
Elastic fabrics; Looms; Rubber industry and trade; Textile fabrics; Weaving
Where there is limited loom space, and where a small number of threads
are employed, as in the narrower garter fabrics, it is not as practical
to have the warps made mechanically, and for this reason they are not
likely to be put on the beams with as much uniformity of tension. In
such cases it becomes necessary to have some automatic device that will
correct any irregularities and maintain a uniform delivery throughout.
The device for doing this is shown at Fig. 4.
The warp carrier A is fastened to the back rail, which carries the warp,
over which is passed the friction cloth G which is hung from a rod D.
The friction cloth is fastened at the bottom to the graduated warp lever
E, which is bolted to the bottom rail H, as shown. The rubber threads
constituting the warp pass in a direct line to the harness C, and then
to the breast beam B. The lever E, and the weights F, allow for proper
adjustment of the friction cloth so as to keep the lever level as the
warp beam empties.
[Illustration: Fig. 3.—Rubber Warping Machine]
In making the rubber warps for narrow fabrics such as garters and
suspenders, where the last described method of warp delivery takes place,
it is customary to work from an entire sheet of rubber, splitting it up
into the required sections or strips of the various sizes called for in
the warps. This splitting and warping process must be done in a long room
where the warp can be stretched out to its full length, if possible,
after it is unchained. These warps are usually about 60 yards long. The
“head” of the sheet, or the part where the cutting knife has not gone
through, is spread out flat on a series of hooks at the beaming machine
and the tail end is fixed securely on a strong hook at the other end of
the room.
The requisite number of threads for the several warps which are to be
beamed are counted off and each different section is fastened to a beam.
The end knot is laid snugly in the counter-sink made in the beam barrel
for this purpose. A wide reed is used, covering the number of beams
operated in the machine, which is usually about four, and the threads are
reeded over spaces opposite the different beams. This reed can be moved
sidewise across the face of the beams and each warp properly centered so
as to keep the warp level. The operator then starts the beaming machine,
which may be operated either by hand or power, and the warps are wound
up. At the same time a helper walks towards the beamer carrying the tail
end of the warps and keeping the tension as nearly uniform as possible.
When the warps are all wound on the several beams, a lease is taken
in each of them in the ordinary manner, and each separate section is
securely fastened.
[Illustration: Fig. 4.—Automatic Friction Let-Off for Rubber Warps]
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