Textiles: weaving – Warp manipulation – Feeding
Patent
1989-03-29
1990-07-24
Falik, Andrew M.
Textiles: weaving
Warp manipulation
Feeding
139110, 139309, 139311, 139 1E, D03D 4904
Patent
active
049429086
ABSTRACT:
A warp transfer control system for a loom, includes a first actuator for varying a warp let-off speed, a second actuator for varying a fabric take-up speed to change a filling density, and a control unit which has a take-up control section for controlling the second actuator, a feedback control section for controlling the let-off speed through the first actuator when no change is required in the filling density, and a feedforward control section for changing the let-off speed so as to improve an appearance quality of a fabric when the density is changed. When a change from a first filling density to a second density is required, the feedforward section first changes the let-off speed excessively from a first let-off speed corresponding to the first density beyond a second let-off speed corresponding to the second density, and holds the let-off speed at such an excessive level for a limited duration.
REFERENCES:
patent: 4480665 (1984-11-01), Imamura et al.
patent: 4605044 (1986-08-01), Sakano
patent: 4619294 (1986-10-01), Sainen et al.
patent: 4817677 (1989-04-01), Deconinck et al.
Falik Andrew M.
Nissan Motor Co,. Ltd.
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