Sulzer Brothers Limited

Walter Stark

Fredy Oderbolz

Hanspeter Bolt

Robert Szonyi

Werner Degen

Weft yarn faults encountered during the operation of rapier looms are corrected by correlating the detection of the fault to the angular position of the rotating main shaft of the loom. The loom has a shed with a giver side and a taker side, a giver rapier at the giver side and a taker rapier at the taker side. Position signals are stored in an electronic storage device for weft yarn faults which can occur at predetermined angular positions of the main shaft during operation of the loom. The weft yarn is monitored and a signal is generated when a faulty weft yarn is detected. This signal is compared with the position signals in a logic circuit to thereby determine the nature of the fault. After the nature of the fault has been determined, the faulty weft yarn is appropriately removed and, thereafter, weaving continues.

Clearing mispicks in rapier looms

A yarn selector unit of a loom has a number of feeders associated one each with a weft yarn. Each feeder is drivable by a tongue drivable selectively via a lever by way of a slide. The tongue and therefore the feeder are moved into a different position when it is required to present a weft yarn to a gripper or withdraw a weft yarn. The tongue is moved transversely by two actuators disposed opposite one another into a predetermined top or bottom position relative to the actuators by the action therefor. Positioning of the tongue relative to a tongue-moving slide is therefore always clearly defined so that misactuation of the yarn selector unit cannot occur.

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Galgenen, Switzerland

Walter Stark