Boots – shoes – and leggings
Patent
1986-10-08
1987-10-27
Smith, Jerry
Boots, shoes, and leggings
19240, 19300, 318625, G06F 1546, D01H 532
Patent
active
047034319
ABSTRACT:
A spinning machine, especially a drawing frame comprising at least a pair of feed rollers provided at a fiber working portion for carding at least one sliver and for feeding said sliver to be carded and drafted, at least one first motor for driving said feed rollers, at least a pair of front rollers for drawing out and feeding said sliver just carded at the fiber working portion, at least one second motor for driving the front rollers, and an electronic rotation control unit for controlling the rotations of the two different motors so as to synchronize the rotation of the first motor with the rotation of the other motor, i.e. the second motor and to be equal to a predetermined set rotational speed ratio. With this construction according to the present invention, gear change can be dispensed with when modifying the draft rate, and the change of the draft rate can be promptly performed. In addition, in the particular embodiment according to the present invention, the electronic rotation control unit can be realized by use of a microprocessor having a ROM and a RAM as well as a CPU so that the rotation control of the various motors for controlling the feeding rollers, a gill box, and the front rollers as well as soft start/stop control can be carried out by the microprocessor.
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Amaike Kanetoshi
Sako Shizuka
Watanabe Youji
Chuba Seiko Co., Ltd.
Lastova John R.
Smith Jerry
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