Weft-switching system with telescoping nozzles

Details Weft-switching system with telescoping nozzles Weft-switching system with telescoping nozzles

1990-03-16

1991-05-28

Falik, Andrew M.

Textiles: weaving

Weft manipulation

Weaving with stationary weft supply

1394351, 139452, D03D 4730

Patent

active

050185578

ABSTRACT:
A shuttleless loom has an injection nozzle that is movable limitedly in the warp direction to one side of the warp and that has a filament-receiving upstream end and a filament-ejecting downstream end from which a weft filament is project in the weft direction through the warp. Separate generally stationary first and second yarn supplies to one side of the warp are associated with respective telescoping feed nozzles to the one side of the warp and each having a generally stationary upstream end and a downstream end displaceable between an advanced position relatively close to the injection nozzle and a retracted position relatively far from the injection nozzle. Respective actuators can displace the first and second nozzles between their positions and respective first and second feeders between the nozzles and the respective supplies supply filaments from the respective supplies to the upstream ends of the respective nozzles so that the respective filaments are ejected from the respective downstream ends thereof. A controller connected to the actuators switches the loom from the filament of one of the supplies to the filament of the other supply by displacing the downstream end of the telescoping nozzle of the other supply to the advanced position and then pneumatically blowing the respective filament from the downstream end of the nozzle of the other supply into the upstream end of the injection nozzle.

REFERENCES:
patent: 3342220 (1967-09-01), Bartosels et al.
patent: 4756341 (1988-07-01), Takehana
patent: 4856691 (1989-08-01), Takehana et al.

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