Spindelfabrik Suessen Schurr Stahlecker & Grill Gmbh

Spindelfabrik Sussen, Schurr, Stahlecker & Grill Gmbh

Other

Hans and Fritz Stahlecker

Maschinenfabrik Rieter Ag

Norbert Barauke

Hans Stahlecker

Kurt Lang

Gernot Schaeffler

Martin Widmann

Nora Stopp

An endless transport belt transports a drafted fiber strand through a fiber bundling zone. The transport belt is provided with a perforation for a suction air stream which suctions the fiber strand. The transport belt is provided with a sufficiently smooth surface for sliding over a suction device. The transport belt can be in the form of an endless woven or knitted sieve belt or alternatively in the form of an extruded plastic apron having punched out holes.

Endless transport belt for transporting a drafted fiber strand and method of making same

A condensing zone is arranged downstream of the drafting apparatus of a ring spinning machine, through which condensing zone an air permeable transport belt transports the drafted fiber strand. A cleaning element is arranged at the transporting element, which cleaning element takes the form of, for example, a cleaning roller, and which is pressed using a light pressure onto the transporting belt. The rotation direction of the cleaning roller preferably runs in the opposite direction to the direction of motion of the transport belt. The driven bottom roller of the front roller pair of the drafting apparatus can serve as a cleaning roller.

Apparatus for condensing a drafted fiber strand

A condensing zone is arranged downstream of the front roller pair of a drafting arrangement of a spinning machine, in which condensing zone a drafted roving or a sliver is condensed. The condensing zone has a suction device which has a closed hollow profile and which serves as a sliding surface for a circulating sieve belt. The sieve belt transports the drafted fiber strand to a nipping roller, which presses the fiber strand and the sieve belt against the sliding surface at a nipping point. The fiber strand travels over an essentially in transport direction extending suction slit located in the condensing zone, which suction slit extends to the nipping point.

Arrangement and method for condensing a drafted fiber strand and method for making yarn therefrom

Arrangement for condensing a drafted fiber strand and method for making

A condensing zone is arranged downstream of the front roller pair of a drafting arrangement of a spinning machine, in which condensing zone a ready drafted fiber strand is condensed by means of rolling in the edge fibers before the yarn to be spun is imparted a twist. The condensing arrangement comprises a sliding surface having a suction slit extending essentially in a fiber strand transport direction, as well as a perforated transport belt which transports the fiber strand over the sliding surface and the suction slit. The sliding surface is the outer contour of a hollow profile, to which a suction device is connected. The transport belt consists of such a thin material that the fiber strand is disposed on the sliding surface and the suction slit at practically no distance thereto. The transport belt is preferably made from polyamide multifilament yarns.

Device for condensing a drafted fiber strand

In order to avoid a damaging of the guiding table and of the bottom apron guided around it when a lap formation occurs on the bottom delivery roller of a drafting unit, it is known to arrange the table top of the guiding table so that it can be swivelled away. In this known construction, a leaf spring is provided which holds the table top in its swivel position. In order to ensure a secure and precise guiding during the swivel movement of the table top, the new apron table is constructed with a projection which is provided on both sides with opposite surfaces which are positively guided during a swivel movement of the table top in a receiving device developed as a connecting link guide.

Apron table arrangement for a drafting unit

In the case of a textile machine comprising drafting units that are disposed next to one another, the bottom cylinders are arranged in the longitudinal direction of the machine so that they continue along several or all drafting units. The continuous bottom cylinders are disposed at several bearing points which are arranged at a spacing from one another in the longitudinal direction of the machine. It is provided, in the case of the delivery bottom cylinder, to design at least some of the bearing points such that they can be radially adjusted. As a result, radial directional deviations of the delivery bottom cylinder can be compensated which occur along its longitudinal dimension.

Textile machine comprising a plurality of drafting units arranged next

In the case of a drafting unit for a spinning machine comprising several drivable bottom rollers, it is provided that the feeding bottom roller is constructed as a sleeve which can be connected with a drive shaft by coupling devices. The coupling devices comprise a swivelling lever which can be applied radially to the drive shaft and which engages in a catch of the drive shaft. The swivel shaft of the swivelling lever is arranged on the sleeve.

Drafting roller sleeve with drive engaging/disengaging lever

In the case of a drafting unit for a spinning machine comprising several top rollers and bottom rollers, continuous cleaning belts are provided which are arranged and held in such a manner that, because of the inherent weight of at least one of the deflecting rollers, they are tensioned, on the one hand, and, on the other hand, are brought to rest against the top rollers or bottom rollers.

Drafting unit with at least one cleaning belt

In a spinning machine with a plurality of adjacently disposed drawing or drafting roller arrangements with which the lower rollers are arranged as lower roller cylinders extending in the machine longitudinal direction, a central control device and adjusting arrangement is provided for the adjustment of the distance of the lower roller cylinders. The central control device is linked to several locations at a lower roller cylinder or to several bearing seats of a lower roller cylinder, whereby all bearing seats of this lower roller cylinder are loosened at guide holders whereby then the bearing seats and the lower roller cylinder are simultaneously brought into the desired position by activating the control device. When in the adjusted position the bearing seats are again fixedly attached to the guide holders.

Spinning machine drafting roller adjusting arrangement

A device for interrupting the feed of a roving to drawing frames of a thread spinning machine of the type wherein each drawing frame comprises a plurality of pairs of upper and lower drawing rollers, of which the lower drawing roller, located on a roving in-feed side of the drawing frame, is provided with a clamping segment for interrupting the roving feed in a released position thereof in response to a broken-end detector, which monitors the presence of a spun thread, is improved by the provision of a suction device, associated with the drawing rollers on a thread formation side of the drawing frames, for collecting rovings present in a drawing frame when the roving feed thereto is interrupted. In accordance with a perferred embodiment, the suction device comprises suction tubes which are mounted for movement away from the drawing rollers and lockable in respective operating and nonoperating positions. According to another feature, the broken-end detector is mounted to an end of the suction tubes which face a drawing roller, which is downstream-most in a direction of the roving feed.

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Donzdorf, Germany

Norbert Barauke