Saurer-allma Gmbh

Rolf-Dieter Weber

Zdenek Hemala, Deceased

Waldemar Rothmeier

Hans Guggemos

A swingable spool holder for a spool which can be driven on its periphery is controlled by a pneumatic drive device which can swing the spool holder between an operating position and a rest position. A compressed-air line is connected to the pneumatic drive device, and to a control valve which can be moved into two switching positions by a feeler lever which engages the thread which is to be wound up. A throttle valve which is effective in one direction is provided in the compressed-air line, which throttle valve is influenced by pressure in the compressed-air line so that it throttles the compressed-air supply to the pneumatic drive in one switching position of the control valve and, in another switching position, permits the rapid escape of compressed-air from the pneumatic drive device into the compressed-air line. An arrangement cooperable with the pneumatic drive device and an operating rod which acts onto the spool holder effects a no-load stroke of the drive device of a predetermined length before the operating rod is moved by the drive device.

Pneumatic drive for a swingable spool holder

A double twisting spindle is equipped with a pneumatically operated threading device. An injector nozzle is provided in the spindle rotor, an air stream through which nozzle sucks a thread into a hollow spindle axle and moves the thread through a thread channel in the storage plate. A compressed-air supply device is arranged below the spindle rotor for supplying compressed air to a central connecting channel provided in the spindle rotor and in communication with the injector nozzle. A common operating lever is provided which first operates a spindle brake and then opens a valve of the compressed-air supply device. The connecting channel has at its open lower end a funnel-shaped enlargement. The compressed-air supply device is stationary and has a blow nozzle which is fixedly arranged a small distance from the lower end of the spindle rotor and has an outlet opening which is coaxial with the funnel-shaped portion, the diameter of the outlet opening being smaller than the inlet diameter of the funnel-shaped portion.

Growing community of inventors

Kempten, Germany

Rolf-Dieter Weber