Rieter Ingolstadt Spinnereimaschinenbau Ag

Jurgen Sauer

Michael Ueding

Michael Maria Strobel

Albert Kriegler

To piece an open-end spinning device, the yarn end is introduced into the spinning rotor while the spinning rotor is stopped. An auxiliary suction air stream prevailing at the opener roller housing takes effect and sucks the yarn into the fiber feeding channel where it is held. The spinning rotor which was stopped until then is then again driven. Following this, the negative spinning pressure is switched on while the auxiliary suction air stream is simultaneously switched off. This causes the yarn end to be taken out of the fiber feeding channel and to be fed to the fiber collection surface of the spinning rotor where it is combined with the fibers which are again conveyed to the fiber collection surface. The yarn is then withdrawn in the form of a continuous yarn through the yarn draw-off pipe and out of the spinning rotor.

Process and device for piecing an open-end spinning device

A flat can for receiving textile fiber slivers deposited therein while a jigging motion is imparted thereto comprises can sides defining an upper can bead at the top thereof. A can plate is configured to be vertically movable within the can sides between an empty position and a full position. In the empty position the can plate is at a height lower than the upper can bead. The can plate may comprise a rim around the circumference thereof which has a top generally adjacent to the upper can bead when the can plate is at the empty position. The rim may include oppositely facing incline surfaces at the ends thereof. The can sides may also include stops defined on the inner surface thereof. The stops serve to define the upper limit of travel of the can plate within the can.

Flat can

The invention is a process and a device for the jigging of a flat can in a textile draw frame. According to the invention, the flat can is subjected to different dynamic moments in the translational movement along the jigging path. It is a characteristic of the invention that the speed is regularly modified in proximity of the reversal points (P1, P2), i.e. in the area of the reversal paths (UW1, UW2). The jigging device is provided with a driving device which renders the constant translational movement changeable in proximity of the reversal point (P1, P2). The driving device may be a servomotor controlled by a computer which serves as the control device. In another embodiment the diving device is a different, less expensive electric motor on the drive shaft of which belt pulleys capable of being coupled are installed.

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Ingolstadt, Germany

Jurgen Sauer