Process for obtaining a woven cloth
AssigneeCortex, LLC
InventorClaude Corbiere
Life of this patent
Estimating the term…
Abstract
A method for obtaining a woven fabric which comprises continuously unwinding from a single warp beam, a set of parallel warp yarns; passing the set of warp yarns on a whip-roll; forming a shed using heald means; inserting a weft yarn in the shed in the proximity of a face stitch to form a fabric; and finally uniformly pulling and batching the resulting fabric. In one aspect of the invention, the method consists of, in the proximity of the shed opening stitch, heating the warp yarns, and then cooling said warp yarns in the shed before they reach the heald means, characterized in that only part (34) of the warp yarns is heated. In one aspect of the invention, the shed may be defined in the forward movement direction of the warp, for example, by the opening stitch and the face stitch.
Claims26
A process for heat treating warp yarns in a loom during a weaving process, the process comprising:
- unwinding a sheet of parallel warp yarns (3) from a single warp beam(1);
- passing said sheet over a back-rest roller (4);
- forming a shed (9) by means of healds (7,8), said shed being defined, in the direction of advance of the warp, at the entrance of the shed by an opening point (15) and on the other side by a fell point (10);
- inserting a weft yarn (16) into the shed in the vicinity of the fell point (10) in order to form a cloth;
- and
- pulling and uniformly winding up the cloth;
- wherein the process further comprises heating only a portion of the warp yarns (3) and cooling the warp yarns;
- and further comprising, after passing the sheet over the back-rest roller, separating the sheet into two series of yarns (33, 34) and maintaining a gap between the two series of yarns (33, 34) wherein only one of the two series of yarns is subjected to the heating operation.
A process for heat treating warp yarns in a loom during a weaving process, the process comprising:
- unwinding a sheet of parallel warp yarns (3) from a single warp beam(1);
- passing said sheet over a back-rest roller (4);
- forming a shed (9) by means of healds (7,8), said shed being defined, in the direction of advance of the warp, at the entrance of the shed by an opening point (15) and on the other side by a fell point (10);
- inserting a weft yarn(16) into the shed in the vicinity of the fell point (10) in order to form a cloth;
- and
- pulling and uniformly winding up the cloth;
- wherein the process further comprises heating only a portion of the warp yarns (3) and cooling the warp yarns;
- wherein the heating is carried out on the warp yarns at a temperature high enough to cause an elongation and a local reduction in the elastic modulus thereof, and
- wherein the process further comprises a subsequent heat treatment step or a treatment in a free state.
A process for heat treating warp yarns in a loom during a weaving process, the process comprising:
- unwinding a sheet of parallel warp yarns (3) from a single warp beam(1);
- passing said sheet over a back-rest roller (4);
- forming a shed (9) by means of healds (7,8), said shed being defined, in the direction of advance of the warp, at the entrance of the shed by an opening point (15) and on the other side by a fell point (10);
- inserting a weft yarn (16) into the shed in the vicinity of the fell point (10) in order to form a cloth;
- and
- pulling and uniformly winding up the cloth;
- wherein the process further comprises heating only a portion of the warp yarns (3) and cooling the warp yarns, and wherein the process further comprises a calendaring step.
A textile cloth obtained according to a process comprising:
- unwinding a sheet of parallel warp yarns (3) from a single warp beam(1),
- passing said sheet over a back-rest roller (4);
- forming a shed (9) by means of healds (7,8), said shed being defined, in the direction of advance of the warp, at the entrance of the shed by an opening point (15) and on the other side by a fell point (10);
- inserting a weft yarn(16) into the shed in the vicinity of the fell point (10) in order to form a cloth;
- and
- pulling and uniformly winding up the cloth;
- wherein the process further comprises heating only a portion of the warp yarns (3) and cooling the warp yarns, and wherein the warp yarns are crepe yarns.
A process for heat treating warp yarns in a loom during a weaving process, the process comprising:
- unwinding a sheet of parallel warp yarns (3) from a single warp beam(1);
- passing said sheet over a back-rest roller (4);
- forming a shed (9) by means of healds (7,8), said shed being defined, in the direction of advance of the warp, at the entrance of the shed by an opening point (15) and on the other side by a fell point (10);
- inserting a weft yarn (16) into the shed in the vicinity of the fell point (10) in order to form a cloth;
- and
- pulling and uniformly winding up the cloth;
- wherein the process further comprises heating only a portion of the warp yarns (3) and cooling the warp yarns;
- and
- further comprising contacting only the heated portion of the warp yarns with a transfer paper, the transfer paper carrying dye patterns, wherein the transfer paper moves in speed relationship with the warp yarns and wherein the dye patterns are transferred only to the heated warp yarns;
- and
- wherein the transfer paper comprises a pattern of parallel stripes in the direction of run of the paper and in that at least one of the boundaries of said stripes is brought close to that portion of the warp yarns on which the printing takes place.
Dependencies are inferred from the claim text.