Zellweger Uster Ag

Hans Wilhelm

Silvio Jaeger

Hermann Eglseer

Raymond Schelling

Alfred Schneller

Karl Schlegel

Apparatus for handling the drop wires after the warp-yarn draw-in has taken place contains rail-like carrier members (12) provided for lining up the drop wires. Threaded spindles (34) are arranged on top parts of the carrier members in position to engage the drop wires on the carrier members. The threaded spindles (34) are for displacing the drop wires in the longitudinal direction of the carrier members. The displacement of the drop wires on the carrier members is thereby automated, and the stress on the warp yarns is kept as low as possible.

Drop wire handling apparatus for warp yarn drawing-in machine

Machine for the automatic drawing-in of warp threads

An automatic drawing-in machine separates warp yarn ends from one another and presents a separated end portion to a pick-up location in alignment with harness components such as a heald and/or a drop wire and/or a reed gap which have themselves been brought to their intended drawing-in positions by different, separately operated systems. Then a drawing-in member engages the yarn end and pulls it through the designed harness component(s). The drawing-in machine (SE) contains a drawing-in member, an arrangement for manipulating the individual harness elements, and a control stage (SM) for controlling the various functions of the drawing-in machine. The latter is composed of modules (PM, SM, XM, AM) for the various functions. The individual modules forming functional, independent units and being connected to one another via interfaces. The modules are controlled by a higher-level computer of the control stage (SM), via which the cross connections between the individual modules also run. The module autonomy enables increased redundancy of individual functions and enables them to be activated individually. In effect, the individual functions depend on one another only to a very small degree and faults are simple to localize.

Apparatus for drawing in warp threads

A drawing-in machine for threading weaving machine harnesses is provided with apparatus for separating one at a time the drop-wires to be threaded from a stack of drop-wires. The stack of drop-wires is moved toward a stop located adjacent a slit. A selecting member (31) in the form of a friction wheel contacts the front face of the forwardmost drop-wire of the stack of drop-wires to urge that drop-wire transversely into the slit so as to separate that drop-wire from the stack. The selecting member moves the front drop-wire from the drop-wire stack into an intermediate position from which it can be separated completely from the stack and threaded with a warp thread. The drop-wires do not need to have any specific configuration at the point of application of the selecting member and they also do not need to be lined up or arranged in a specific manner. The friction wheel contacting the drop-wires at their front face is able to singularize all types of drop-wires.

Growing community of inventors

Chur, Switzerland

Hans Wilhelm