Weaving loom and method for weaving a multilayer fabric
AssigneeStaubli Bayreuth GmbH
InventorsJens Ignatzy, Andreas Schnabel
Life of this patent
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Abstract
A weaving loom for weaving a multilayer fabric with weft insertion mechanism (90) and main heddles moved by a Jacquard main shedding mechanism for guiding main warp yarns (12) and defining a main harness width (W11). According to the invention, the weaving loom includes auxiliary heddles (21) moved by an auxiliary shedding mechanism, for guiding auxiliary warp yarns (22) and defining a clamping area (W21) arranged within the main harness width (W11). At a first pick, the auxiliary heddles are configured for closing the auxiliary shed of auxiliary warp yarns for clamping an inserted weft (100) while the main shed is still open.
Claims18
A weaving loom for weaving a multilayer fabric comprising warp yarns and weft yarns, the weft yarns being of different lengths, wherein the weaving loom comprises:
- insertion means, configured for:
- picking a weft at a pickup position along a weft axis of the weaving loom,
- drawing the weft from the pickup position into a shed of warp yarns along the weft axis, and
- releasing the weft at a given position along the weft axis;
- main heddles, configured for guiding main warp yarns and defining a main harness width along the weft axis;
- a main shedding mechanism of the Jacquard type, configured for moving the main heddles along a vertical path;
- a set of first auxiliary heddles, configured for guiding first auxiliary warp yarns and defining a first clamping area along the weft axis, the first clamping area being arranged within the main harness width;
- and
- a first auxiliary shedding mechanism, configured for moving the first auxiliary heddles;
- wherein the weaving loom is configured for, at a first pick:
- opening a main shed of main warp yarns by means of the main heddles, moved by the main shedding mechanism, and opening a first auxiliary shed of first auxiliary warp yarns by means of the first auxiliary heddles, moved by the first auxiliary shedding mechanism, for the insertion of a first weft by the insertion means;
- and
- closing the first auxiliary shed by means of the first auxiliary heddles, moved by the first auxiliary shedding mechanism, for clamping the first weft with the first auxiliary warp yarns in the first clamping area, after the insertion means have drawn the first weft through the first clamping area and while the main shed is still open.
A method for weaving a multilayer fabric comprising warp yarns and weft, the weft yarns being of different lengths, by means of a weaving loom comprising:
- insertion means, configured for:
- picking a weft at a pickup position along a weft axis of the weaving loom,
- drawing the weft from the pickup position into a shed of warp yarns along the weft axis, and
- releasing the weft at a given position along the weft axis;
- main heddles, configured for guiding main warp yarns and defining a main harness width along the weft axis;
- a main shedding mechanism of the Jacquard type, configured for moving the main heddles vertically along a vertical path;
- a set of first auxiliary heddles, configured for guiding first auxiliary warp yarns and defining a first clamping area along the weft axis, the first clamping area being arranged within the main harness width;
- and
- a first auxiliary shedding mechanism, configured for moving the first auxiliary heddles;
- wherein the method comprises, at a first pick:
- opening a main shed of main warp yarns by means of the main heddles, moved by the main shedding mechanism, and opening a first auxiliary shed of auxiliary warp yarns by means of the first auxiliary heddles, moved by the first auxiliary shedding mechanism;
- by means of the insertion means, picking a first weft at the pickup position;
- by means of the insertion means, drawing the first weft from the pickup position into the main shed and into the first auxiliary shed;
- closing the first auxiliary shed by means of the first auxiliary heddles, moved by the first auxiliary shedding mechanism, for clamping the first weft with the first auxiliary warp yarns in the first clamping area, after the insertion means have drawn the first weft through the first clamping area and while the main shed is still open;
- by means of the insertion means, releasing the first weft;
- and
- by means of the main heddles, closing the main shed.
Dependencies are inferred from the claim text.