Abstract: The invention relates to a drafting device with twin top front rollers surrounded by aprons in which the aprons are guided around deflection members arranged above the area facing away from the clamping surface of the front roller pair. In order to achieve a low-friction, brake-free and low-wear running of the aprons, they are guided with only a slight tension around the deflection members. For this, the tendency of the aprons to assume a circular form in the circumferential direction is utilized. This tendency brings about, with the appropriately selected interval between the top front rollers and between the surfaces of the deflection members, the low contact pressure on the surfaces striven for and the low tractive tension in the aprons striven for.

Abstract: In the pneumatic pressing of textile strands in a drafting frame the pressure in the pressure line is monitored by a pressure sensor and/or a flowmeter and used to control a value between the pressure source and that pressure line. According to the invention a disturbance signal is outputted when the pressure in the line drops below a threshold, the control signal for the valve exceeds a threshold, the displacement of the value member exceeds a certain level and the flow rate exceeds a value so as to indicate leakage beyond a tolerance level.

Abstract: The combing machine is provided with a plurality of combing devices for delivering a plurality of combed slivers as well as a drafting system for receiving and drafting the combed slivers for delivery to a can press. A measuring device is provided to measure the thickness of the sliver delivered to the drafting system and to deliver a signal to a control unit which, in turn, regulates the drafting of the sliver within the drafting system in accordance with the received signal in order to obtain an evened combed sliver.

Abstract: A draft device for a spinning machine comprises a plurality of pairs of a top roller and a bottom roller, a draft cradle for supporting shafts of the top roller and a belt tenser. Top roller shafts are supported by a top roller support which is rotatably supported on a frame at one end thereof and side plates for fitting the top roller shafts therein, and spring members for pressing the roller shafts are disposed within the top roller support. A tenser of the belt tenser has an engaging portion wherein the top roller shaft is loosely fitted.

Abstract: A bottom tenser utilized for a drafting means of a spinning frame, especially for fasciated yarn spinning, in which a fiber bundle is attenuated at a high speed exceeding 100 m/min. The bottom tenser as well as a bottom roller corresponding to the tenser is provided with a free end through which an apron is easily removable from and mountable on the tenser and the roller. The tenser may be constituted by a body and at least a guide wall movable relative to the body. The guide wall prevents lateral movement of the apron in its operative position and, in turn, is displaced or removed from the body in its non-operative position so as not to obstruct an apron exchanging operation.