Abstract: A spinning machine includes a yarn draw-off apparatus having a pair of rollers including a draw-off roller being continuously rotatable in a draw-off direction and a shiftable contact roller to be pressed against the draw-off roller for clamping a spun yarn in a gap between the rollers and transporting the yarn. A method and apparatus for drawing-off a yarn produced in the spinning machine include driving the contact roller at a predeterminable circumferential speed prior to beginning drawing-off yarn while the gap between the rollers is open, before pressing the contact roller against the draw-off roller for drawing-off the yarn and closing the gap between the rollers.

Abstract: In the case of a process for producing packages used as feeding packages for twisting, it is provided that two prestrengthened yarn components are wound up side-by-side as a double yarn. If one yarn component breaks, the winding-up is interrupted. The unbroken yarn component is gripped and held ready at a given point so that it may be taken up for a piecing and wound off the partially wound spool, while taking along the broken yarn component from the partially wound spool.

Abstract: In the event of a yarn breakage the pressing roll of the inlet roll pair of a drafting arrangement is raised by a slubbing guide element from the inlet drafting roll or cylinder while simultaneously forming a clamping location for the slubbing or other fiber material.

Abstract: A device, to be incorporated in a spinning frame and including supply rollers for the input of a sliver, a sliver control and drawing station for transforming said sliver into a yarn, and a yarn winding outlet station, comprises on the one hand, between the control and drawing station and the yarn winding outlet station, detector means for detecting the presence of the yarn, and, on the other hand, sensitive means responsive to said detector means for stopping the sliver feed by the supply rollers in case of absence of yarn as detected at the outlet.

Abstract: A stop motion apparatus for a drafting device for roving in a textile machine includes a stop member into roving stopping engagement with the intake feed rollers of the drafting device by operation of an actuating rod. The actuating rod includes a notch having an undercut surface for engagement by a plunger element. Preferably, the undercut surface is transversely arcuate and the plunger element includes a plastic sleeve element compatibly configured with the actuating rod notch. the plunger element is selectively insertable into, and retractable from, the notch of the operating rod by an electromagentic assembly operatively connected to a yarn break monitor. The stop motion apparatus includes a shaft having a forked end for manually clearing the plunger element from the actuating rod notch.

Abstract: In an arrangement for interrupting the operation of an individual drafting frame at a spinning machine, devices are provided for reducing the contact of a sliver with the bottom rollers and particularly for lifting the sliver off the bottom rollers which are operative when the pressure rollers are lifted off the bottom rollers.

Abstract: An apparatus for supporting a stop member of a stop motion device of a textile ring spinning machine is provided. The apparatus includes a carriage having a cam portion for removably receiving and manipulating the projecting cam follower portion of the stop member, a device for reciprocating the carriage and a device for releasably positioning the carriage on the reciprocating device in a predetermined position. The carriage is disengagable from the positioning device for movement therefrom sufficiently to permit removal and replacement of the stop member from the carriage and is reengagable with the positioning device for positioning the carriage in its predetermined position. Preferably, the carriage and the positioning device each includes cooperatively configured portions for releasable interengagement with one another to position the carriage in its predetermined position.

Abstract: An improvement in a roving stop motion for a spinning machine of the type having a series of pairs of drafting rollers, the stop motion including a clamping member mounted on a lever arm drivenly connected to an actuating rod by a carriage which is selectively mountable at differing locations along the actuating rod. The actuating rod is responsive to roving breakage to drive the lever arm to cause the clamping member to separate the feed rollers from one another and press the roving against one roller. The positionability of the carriage enables the lever arm to be properly disposed with respect to the feed rollers when the spacing between the roller pairs is varied.

Abstract: Apparatus for spinning yarn from roving including a spinning frame with spinning units arranged thereon. The roving to be drawn is fed from a common double-roving bobbin to each of two neighboring spinning units, further referred to as spinning units pair. At least one stopping device is assigned to each of the spinning units of the spinning units pair, to stop and release again the roving feed to the two drawing frames of the respective spinning units pair. The purpose of the stopping device is to reduce the loss of roving and to avoid the danger of yarn lapping on the drawing rollers. The stopping device can be actuated by each of two yarn break sensors of the spinning units pair for the simultaneous arrest of the roving. In a second embodiment a yarn-setting carriage is provided on the spinning frame to correct a yarn break, such correction occuring only when all correction hindering conditions are absent.

Abstract: A clamp is disclosed to be mounted on a yarn spinning machine and, if a roving of the yarn should break, serves to clamp the roving preventing it from further unravelling. The clamp comprises a housing body including a member for defining a passage guide for the roving and a blocking element mounted by the housing body to be moved by a biasing spring from a detained position to a roving clamping position. A sensor is provided to sense the breakage of the roving for actuating an electromagnet for releasing a lever that normally engages and holds the blocking member in its retained position, whereby the blocking element is moved by the spring to it's clamping position to thereby retain and clamp the roving against the member. A guide channel is attached to the housing body and further supports a fastening mechanism for mounting the clamp to the spinning machine.

Abstract: Roving or sliver clamping device at the drafting unit of a spinning machine, with a clamp segment which enters in the operative position between the upper inlet roller and the lower inlet roller of the drafting unit, and which clamp segment raises the upper inlet roller from the lower inlet roller, and clamps the roving or sliver against the upper inlet roller, whereby the clamp segment is acted upon by an actuating element which causes its roving or sliver-clamping position, and the clamp segment is maintained in the position in which the roving or sliver clamping device is at rest by a holding element. The holding element includes means for storing energy and it positively counteracts the actuating element.

Abstract: A roving moving to a spinning machine passes between top and bottom input rolls of which the top roll is adapted, upon breakage of the roving, to be raised by a lift member which is movable into engagement with the spindle of the top roll and carries with it a clamping element which serves to clamp the incoming broken end of the roving against the top roll to retain it ready for subsequent rethreading into the nip of subsequent drafting rollers.

Abstract: A yarn stop-motion device for use with a yarn-processing apparatus comprising yarn break-detector means, yarn cutting means and yarn guide means positioned close to each other and combined in a single unit. This device is characterized in that the yarn guide means releases the yarn into the yarn cutting means upon detection of a yarn break by said yarn break-detector means.

Abstract: A yarn throwing and twisting machine has at each of a number of working positions two or more throwing spindles, a twisting spindle, a manually disengageable yarn feeder, and yarn break detectors. Pneumatic jacks are provided to disengage the spindles and feeder upon yarn breakage and are controlled by air supplied through a solenoid valve responsive to the yarn break detectors and by a manually operable valve between the throwing and twisting spindles. The solenoid valve is closed, however, upon manually disengagement of the yarn feeder for the purpose of allowing starting up at an individual working position after yarn breakage.