Method and apparatus for the insertion of a weft thread
AssigneeSultex AG
InventorsRemo D'Incau, Marius Bachofen, Davide Maccabruni
Life of this patent
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Abstract
A method for the insertion of a weft thread into a shed of a rapier weaving machine is presented in which the weft thread (3) is taken up by a bringer rapier (10) and fixedly clamped in the same by means of a thread clamp, is inserted into the shed by means of the bringer rapier and is taken up by a taker rapier. In the said method the clamping force of the thread clamp in the bringer rapier is additionally controlled during the weft insertion in such a way that the clamping force (F0) during the take-up of the weft thread and/or during the transfer of the weft thread is reduced relative to the clamping force (F1) in the insertion phase lying therebetween.
Claims19
A method for the insertion of a weft thread into a shed of a rapier weaving machine in which the weft thread
- is taken up by a bringer rapier and fixedly clamped in the same by means of a thread clamp;
- is inserted by means of the bringer rapier into the shed;
- is taken over by a taker rapier and fixedly clamped in the same by means of a thread clamp;
- and
- the insertion of the weft thread is continued by means of the taker rapier, wherein
- the clamping force of the thread clamp in the bringer rapier is controlled during the weft insertion in that
- the clamping force of the thread clamp is reduced by means of at least one magnet and a magnetizable part cooperating with the at least one magnet during the take-up of the weft thread and/or during the take-over of the weft thread relative to the clamping force in the insertion phase lying therebetween, and one of the at least one magnet and the magnetizable part is arranged on a part of the thread clamp and the other is mounted outside of the rapier and is stationary with respect to the rapier.
An apparatus for the insertion of a weft thread into a shed of a rapier weaving machine, said apparatus including a thread clamp for a bringer rapier, wherein the apparatus additionally includes at least one magnet and a magnetizable part cooperating with the at least one magnet in order to reduce the clamping force of the thread clamp during the take-up of the weft thread and/or during the take-over of the weft thread to a taker rapier relative to the clamping force in the insertion phase lying therebetween, to a predetermined value and wherein one of the at least one magnet and of the magnetizable part is arranged on a part of the thread clamp and the other is mounted outside of the rapier and is stationary with respect to the rapier.
A rapier weaving machine equipped for the insertion of a weft thread into a shed of a rapier weaving machine in which the weft thread
- is taken up by a bringer rapier and fixedly clamped in the same by means of a thread clamp;
- is inserted by means of the bringer rapier into the shed;
- is taken over by a taker rapier and fixedly clamped in the same by means of a thread clamp;
- and
- the insertion of the weft thread is continued by means of the taker rapier, wherein
- the clamping force of the thread clamp in the bringer rapier is controlled during the weft insertion in that
- the clamping force of the thread clamp is reduced by means of at least one magnet and of a magnetizable part cooperating with the at least one magnet during the take-up of the weft thread and/or during the take-over of the weft thread relative to the clamping force in the insertion phase lying therebetween, and one of at least one magnet and of the magnetizable part is arranged on a part of the thread clamp and the other one is mounted outside of the rapier and is stationary with respect to the rapier.
Dependencies are inferred from the claim text.