Motive drive for warp selection

Details Motive drive for warp selection Motive drive for warp selection

2001-03-13

2002-10-29

Vanatta, A. (Department: 3765)

Textiles: weaving

Warp manipulation

Shedding

C310S311000, C139S319000, C139S055100

Reexamination Certificate

active

06470919

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a motive assembly for selectively controlling shedding of warp threads in a loom.
SUMMARY OF THE INVENTION
According to a general aspect of the present invention there is provided a motive assembly for moving a plurality of warp yarns in a loom between upper and lower shed positions, the motive assembly including a plurality of selectively controllable ultrasonic cyclic motors, each of which is drivingly connected to one or a group of said warp yarns for moving the warp yarn(s) between upper and lower shed positions.
Preferably the ultrasonic cyclic motor is a piezo motor, preferably operating at a frequency of between 20-40 KHz.
The motor may be drivingly connected to the warp yarn by a rigid elongate heald rod which is driven by the motor. The motor may directly contact the elongate heald rod in order to displace it longitudinally. Alternatively, the motor may drive the heald rod indirectly via a transmission means such as a drive gear or wheel.


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patent: 98 07200 (1998-02-01), None

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