Zellweger Uster, Inc.

Zellweger Luwa Ag

Zellweger Uster Ag

Staubli Ag

Martin Plaschy

August Baumgartner

Walter Krebs

Reinhard Furrer

Felix Walser

Method and device for fixing the ends of a yarn layer wound in an

Method and device for determining strength properties of the warp

Simplified warp change in which a winding unit and clamping members are

Clamping device for a plane thread layer and use of said device

A tying machine includes a tying device, grippers for two groups of warp threads (K.sub.a, K.sub.n) which are to be tied together and a device for separating the outermost warp thread of each group and moving it out of the plane of the warp. In the region between the separating device and a gripper, the warp threads are guided over a thread guide where the outermost warp thread is deflected and moved out of the plane of the warp. A measuring device for measuring the force exerted by a deflected warp thread on the point of deflection or on the separating device is arranged in the region of deflection, and the signal of this measuring device serves as criterion for the presence of a double thread. The measuring device may be a piezoelectric pressure convertor or an elongation measuring strip or a piezo sensor which is sensitive to deflection. Thus, the measuring device is virtually unaffected by dirt or dust. Since the signal produced by a double thread is twice as great as that produced by a single thread, such double threads are reliably recognized.

Monitoring device for double threads in warp tying machines

This invention relates to a method and an apparatus for avoiding untwisting during the formation of a binding of two fiber bundles. The rotational direction of deformation members acting on the fiber bundles is selected to be different in different groups of deformation members in order to reproduce or to increase the original twist during the binding operation.

Production of bindings of fiber bundles

Growing community of inventors

Hombrechtikon, Switzerland

Martin Plaschy