Abstract: A drawing roller unit is constructed with a godet and an electric motor mounted on a common shaft. A passage is provided throughout the unit to convey a non-flammable scavenging gas through the motor and the godet to reduce the risk of explosion due to sparking by the electric motor and/or other electrical parts of the drawing roller. The gas introduced can leave the unit only through a narrow gap. The pressure of the gas is consequently above atmosphere pressure and prevents the entrance of air.

Abstract: Threads consisting of one or more filaments are drawn by being pulled through a braking fluid. Threads consisting of a plurality of filaments are formed into a ribbon for the drawing process. Inside the drawing bath, the thread is heated to a temperature corresponding to its second order transition temperature and is braked in such a way that its tension reaches the tension necessary for drawing the filament or the filaments. Through setting and/or controlling the length of the thread path inside the braking fluid, the viscosity of the fluid, additional mechanical braking means and/or the flow characteristics in the bath, the process is made adaptable for different thread materials and different thread speeds and can be optimized for thread quality. The device for carrying out the process has a quasi-closed main chamber through which a braking fluid is circulated. An antechamber with a variable fluid level may be arranged in front of the entrance to the main chamber.

Abstract: A textile machine is provided with apparatus for preparing the trailing end of a lap and a leading end of a fresh lap so that each end has a reduced fiber mass per unit length of lap in the prepared end. These lap ends are thereafter superimposed and joined together for subsequent processing in a combing unit of a combing machine or a drafting unit of a ribbon lap machine. The respective ends of the two laps may be prepared by a tearing action caused by clamping of the respective lap end between two spaced apart nip lines which are moved away from each other and wherein the spacing is slightly more than the length of the longest fiber in the lap. Preparation of a lap end may also be accomplished using a suction head for clamping of a lap along a nip line in order to carry out tearing of the lap to produced a prepared end.

Abstract: The invention relates to the production of untwisted yarns from at least two fibril bundles. It gives intermediate method steps, which are so introduced between the main steps of the conventional production method for such yarns (spinning, stretching and texturing), that the reciprocal position of the individual fibril bundles resulting from the arrangement of the spinnerets can be retained through the process. A non-positively acting false twister for each individual fibril bundles, whose strength or thickness can be varied, also makes it possible to reproducibly vary the mixing the fibrils of the individual bundles in their contact zones.

Abstract: The method for mixing textile fibers utilizes a computer which is inputted with data concerning the characteristics of the fibers of the individual fiber bales to be processed as well as the data indicative of the desired characteristics of the board sliver or yarn which is to be manufactured from the fiber mixture obtained from the fibers of the individual bales. From the inputted data, the computer, in accordance with a predetermined computing algorithm, calculates a component distribution which comes close to the estimated component distribution and which satisfies the desired characteristics of the car sliver or yarn characteristics. The computer may also effect a correction of the computed component distribution taking into account boundary conditions with additional inputted information.

Abstract: The detaching roller aggregate comprises two pairs of cylinders each consisting of a detaching roller and a printing cylinder which are pressed against each other by means of a contact pressure device. The contact pressure device is arranged in such a way as to press the two cylinders of the second pair against each other with a larger force than the force pressing the two cylinders of the first pair together. The ratio of the two forces may be approximately 1.2:1 to 2:1. Due to the larger force with which the cylinders of the second pair are pressed against each other, a more even top fleece is produced, in particular during the combing of relatively long fibers and/or at high processing speeds.

Abstract: The combing machine as provided with a nipper jaw unit in which a nipper lip is provided on the top nipper plate to project in overlapping relation to the lower nipper plate for clamping a wadding therebetween. In a fully closed position of the nipper plates, with the nipper plates in contact, the nipper lip projects into the plane of the needles of the combing segment of the combed cylinder. However, the combed segment is provided with raised bearing segments to lift the nipper lip away from the needles over a safety clearance. In other embodiments, stops can be provided on the lower nipper to limit the movement of the top nipper towards the closed position.

Abstract: A draw frame with a main control for a drafting arrangement having at least one independent drive group for at least one drafting zone. Each independent drive group has an auxiliary closed loop control system having a controller. Fiber slivers are drawn through the drafting arrangement through the drafting zones. When the control the range of a certain controller is exceeded, a nominal adjustment of at least one drive group is effected through a control connection.

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 method for the production of untwisted yarns from at least two fibril bundles. Intermediate method steps, which are introduced between the main steps of the conventional production method for such yarns (Spinning, stretching and texturing), allows the receiprocal position of the individual fibril bundles resulting from the arrangement of the spinnerets to be retained through the process. A non-positively acting false twister for each individual fibril bundle, whose strength or thickness can be varied, also makes it possible to reproducibly vary the mixing of the fibrils of the individual bundles in their contact zones.

Abstract: The nipper unit comprises a lower nipper as well as a an upper nipper and an auxiliary nipper, the latter two each being movable with respect to the lower nipper between a closed position and an open position. The auxiliary nipper is spring-loaded against its closed position. If the upper nipper is in its opened position, the auxiliary nipper is in its closed position and is used to tightly clamp a lap on a lower nipper plate while a previously combed fiber tuft is detached therefrom. When the upper nipper moves to its closed position, stop elements arranged on the upper nipper come into contact with stop surfaces arranged on the auxiliary nipper and open the auxiliary nipper so that the lap on the lower nipper plate can be advanced. The timing of the opening of the auxiliary nipper is determined by the position of the stop elements on the upper nipper.

Abstract: A ring spinning machine comprises at least one group of spinning stations or points (11) arranged adjacent each other at equal intervals, a bobbin change device (14) for simultaneous replacement of full bobbins (15 ) spooled with yarn by empty bobbins (16) at each spinning point (11) and an endless conveyor (17) which extends along the spinning points (11) and is led from one end of the spinning point group (12) to the other back on itself and on which at the interval of the spinning points (11) upright bobbin pegs (13) are arranged in such a manner that in a bobbin change position of the endless conveyor (17) each spinning point (11) is exactly aligned with a bobbin peg (13) associated individually therewith. Each bobbin peg (13) is arranged on its own peg support tray (18).

Abstract: An endless conveyor for ring spinning machines comprises bobbin pegs (13) for receiving full and/or empty bobbins which seen in the conveying direction of the endless conveyor (17) must assume an exact position on the endless conveyor (17) in order in a predetermined bobbin change position to come into alignment with a spinning point (11) or other bobbin support arrangement and thus ensure a perfect bobbin transfer from or to the bobbin peg (13). Each bobbin peg (13) is mounted on the endless conveyor (17) adjustably in the conveying direction via a driver (19).

Abstract: The grippers are mounted on a doffer bar so as to disengage from both the top and bottom of the bar should a mis-alignment occur relative to a bobbin tube. The removal or separation of a gripper from the bar causes a pneumatic or electrical signal to be generated which can be used to indicate the individual disturbance location. A light may also be provided at each gripper station in order to indicate a position of a disturbance.

Abstract: An endless conveyor in a ring spinning machine comprises bobbin pegs for receiving full and empty bobbins which must assume an exact position in order in a predetermined bobbin change position of the endless conveyor to come into alignment with a spindle or bobbin support arrangement and thus ensure bobbin transfer from or to the bobbin peg. The endless conveyor is divided in the longitudinal direction into various sections which are connected by connecting links or locks of different length in such a manner that a plurality of bobbin pegs arranged on a section in the bobbin change position of the endless conveyor can be exactly aligned with the associated spinning points by inserting locks of different length or by changing the effective length of the locks at both ends.

Abstract: A ring spinning machine is provided with a carrier rail extending along each row of spinning stations for slidably guiding peg trays. A guide rail is secured to the carrier rail for receiving connecting pieces in snap-fitted relation which serve to move the peg trays along the carrier rail. The connecting pieces are secured to a vertically disposed conveyor belt so that the conveyor belt is guided by the connecting pieces along the spinning stations.

Abstract: The drawroll unit has a heatable galette in which the shaft of the gallette is mounted in bearings which, in turn, are mounted via vibration damping devices in a stationary housing. The vibration damping devices may be in the form of bodies of interlaced wire, O-rings or the like. The vibration damping devices serve to damp vibrations of the shaft in a critical speed range within the normal speed range of the rotor so that the galette can be operated at any speed within the normal speed range.

Abstract: The combing head has a pair of lateral guide elements mounted on the lower nipper part with each having a fiber guide surface disposed in front of the front edge of the lower nipper plate in order to laterally guide the fiber tuft extending from the lower nipper plate. The lateral guide elements are connected with a second pair of lateral guide elements on the lower nipper plate behind the front edge of the lower nipper plate. The second pair of guide elements also have fiber guide surfaces for guiding the lateral side edges of the fiber tuft. The pairs of guide elements each define a space therebetween of decreasing width in a perpendicular direction relative to the plane of the lower nipper plate.

Abstract: A conveying system is provided for conveying lap rolls between different stories of a building. The conveying system includes an elevator and a transfer station on each story. A control unit controls the elevator and transfer stations independently of the operation of the machines on the two stories for the conveyance of the lap rolls as well as other intermediate products.

Abstract: There is disclosed a method for the adjustment of an optical row of sensors which, for guiding a driverless vehicle along an optical guideway, is secured at the vehicle transversly with respect to the vehicle travel direction. Known systems attempt to accomplish a compensation of component tolerances by carrying out an adjustment between the measurement signals of the sensors. However, this leads to inaccurate measurement values. A post-adjustment of a contrast value is not contemplated with these systems. The invention eliminates these inaccuracies and affords an exact post-adjustment. On the one hand, this is attained in that the sensors are adjusted by a calibration surface and the adjustment values for controlling the sensors are stored in an adjustment table. On the other hand, it is proposed to perform the adjustment operation at the site of use of the equipment and to provide an adaptive post-adjustment of the thus set adjustment table.