Technique for controllably reciprocating the weft insertion port

Details Technique for controllably reciprocating the weft insertion port Technique for controllably reciprocating the weft insertion port

1976-08-30

1978-01-17

Kee Chi, James

Textiles: weaving

Weft manipulation

Weaving with stationary weft supply

139144, D03D 4724, D03D 4934

Patent

active

040686868

ABSTRACT:
Facilities for controllingly reciprocating a hydraulically-actuated piston coupled to a gripper shuttle are described. A first hydraulic fluid reservoir and the cylinder housing the shuttle-engaging piston are disposed in a unitary, substantially closed housing pivotally supported on a rotatable shaft of the loom. Piston-actuating fluid is cyclically introduced rearwardly of the piston into an elastomeric reservoir disposed behind and coupled to a perforated rear wall of the cylinder. Fluid from the first reservoir in the housing is periodically transferred into the second reservoir to launch the shuttle. To effect the return stroke of the piston, fluid from the first reservoir is transferred to the front end of the cylinder in timed relation to the fluid transfer to the second reservoir. Facilities are provided for controllably removing fluid from the second reservoir prior to the return stroke of the piston, and for abruptly removing hydraulic fluid from the front end of the cylinder prior to the launching stroke of the piston.

REFERENCES:
patent: 717965 (1903-01-01), Blundell
patent: 2677933 (1954-05-01), Hopkinson
patent: 3330305 (1967-07-01), Svaty et al.
patent: 3722552 (1973-03-01), Indra et al.

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