Leesona Corporation

Karl W Wueger

Charles W Brouwer

Larry C Cowan

Robert Horton

H Gary Osbon

Air weft insertion nozzle control system

An intermittently-operating strand delivery system having:

Strand delivery system

A strand is furnished to a strand consuming unit, e.g. loom, having a periodic demand for a finite length of strand by:

Strand delivery and storage system

A method and apparatus for inserting a weft strand into the shed of a loom or the like in which a confined zone is provided in proximity to the shed serving as a guide for a weft strand passing through the zone, and a sustained pulse of a supersonic gaseous medium is abruptly expelled from the zone directed toward said shed to thereby pass the weft strand through at least a portion of the shed. The strand is preferably confined to a pre-selected path during passage of the pulse of medium and the strand through at least the stated portion of said shed.

Air weft insertion system

Loss of tension in individual warp threads is detected in the lease zone by directing a flow of air against one side of the warp threads within the lease zone to displace any relatively untensioned thread toward the opposite side of said zone and detecting such displacement photoelectrically. Preferably, the photoelectric detector is insensitive to disturbances other than thread displacement.

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Wakefield, RI, United States of America

Karl W Wueger