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 bottin 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: 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: Individual fiber components are blended in accordance with the properties of a required intermediate product such as a card sliver or an end product such as a yarn. The fiber bales are combined into component groups and the fiber components in the groups are accurately supplied by metering devices to a blender in which the components are uniformly mixed. The product from the blender may be cleaned and thereafter carded into a sliver. The characteristics of the sliver, such as the color, fiber, fineness and quantity, are tested and adjustments made in the blending in dependence upon any deviation from preset values for the characteristics.

Abstract: The combing machine has at least one comber head which contains a continuously rotatable comb cylinder, a reciprocating nipper jaw unit and at least one detaching roller. The detaching roller is rotated during every revolution of the comb cylinder at first through a small angle in a backwards direction and then through a large angle in a forward direction. The rotations of the detaching rollers are produced by an electric motor which receives appropriate drive pulses fed from an electronic control unit.

Abstract: The bearing unit comprises a plurality of bearing elements rotatable relative to each other. A shell encircles the plurality of bearing elements. A body of resiliently compressible material is located between the shell and the plurality of bearing elements and possesses a predetermined compressibility. This body of resiliently compressible material retains the plurality of bearing elements relative to the shell and permits free adjustment of the plurality of bearing elements relative to the shell within limits determined by the predetermined compressibility of the resiliently compressible material.

Abstract: The drawframe has a preliminary drafting zone with a draft of from 4 to 8 as well as a main drafting zone with a draft of at least 30. In addition, a deflecting rod is disposed in the preliminary drafting zone in order to deflect the flow of fiber by about 1 millimeter. The deflecting rod is positioned centrally between the nips of the rollers defining the preliminary drafting zone. The guide surface of the deflecting rod may be convexly rounded not only transversely but also longitudinally in guiding the fiber flow thereover.

Abstract: For the automatic compensation of density or thickness variations of fiber material at textile machines there is measured the density of a fiber material mass fed to a fiber feed device and the density of the fiber material mass at the textile machine outlet. The resultant measurement signals are delivered to a control for regulating the rotational speed of a feed roll of the fiber feed device in accordance with both measured density signals. The fiber feed device comprises the feed roll and a coacting feed plate. The feed roll, although rotatable, is spatially stationary and is pivotal from a starting position in the absence of the fiber mass into an operative position into contact with an abutment when there is present a fiber mass whose density variations are to be detected. By positionally fixing the feed plate during the detection operation different forces arise, depending upon the thickness or density of the fiber mass, in the nipping zone between the feed roll and the feed plate.

Abstract: The drive system connects a servomotor via a clutch to a shaft after the motor has started up from a standstill to a speed in synchronism with the supply frequency to the servomotor. The clutch may also be actuated to disengage the servomotor from the shaft when the servomotor is slowed to a predetermined speed during stopping of the servomotor. A transmission is employed between the servomotor and the shaft to compensate for any shocks to the motor when engaging the clutch.

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: There are disclosed one-piece chuck structures for use in winding machines and particularly, but not exclusively, for use in high speed winding machines for the take-up of synthetic plastics filament. These one-piece chuck structures comprise a first elongated tubular portion adapted to receive one or more bobbin tubes and a second elongated tubular portion integral with the first elongated tubular portion and of reduced external diameter relative thereto. Bearings cooperate with the exterior of the second elongated tubular portion such that the first elongated tubular portion and the second elongated tubular portion are rotatable about a common longitudinal axis. Also disclosed are hollow bobbin tube-engaging elements as well as double-arm tube-positioning members which can be used with such and other chuck structures.

Abstract: The comber has at least one combing head comprising an oscillating nipper unit with an intermittently rotatable feed roller for advancing the lap feed to be combed in the combing head. An electric motor is provided to rotate the fed roller and is energized with drive pulses by a control unit. The magnitudes and phases of the drive pulses are adjustable in the control unit relative to the movements of the nipper unit. Consequently, the angle through which the feed roller rotates during a single reciprocation of the nipper unit and the instant of time of such rotation can be readily adjusted steplessly even with the comber runner. Also, a closed-loop control is possible if the angle through which the feed roller rotates is so adjusted in the control unit by a controller that the yarn count, as determined continuously by a sensor of the combed sliver deliver by the combing head always remains substantially constant.

Abstract: The textile machine, for example a spinning machine, comprising at least one drawing system consisting of a plurality of runs, such as pairs of rollers and the like. At least two such runs each have a cylinder having markings which are detected by a sensor of a separate pulse generator. The output signal S.sub.1 of one pulse generator is applied to a count input of a counter while the output signal S.sub.2 of the other pulse generator is applied to a reset input of the counter. The counter can be reset by the output signal S.sub.2 only during a preset reset time window. When the counter has counted to the end of this time window, the counter furnishes a trigger signal S.sub.3 for an alarm and the like.

Abstract: The auxiliary device for drawing in a lap sheet between the calender rollers includes a curved plate and a flexible flat structure secured to a rear edge of the plate. The plate is introduced into a gap between the first two calender rollers and moved about the second roller until entering the gap between the second and third rollers. The start of a lap sheet is then placed on the flexible flat structure and secured thereon and the plate and flexible flat structure then advanced until the lap issues upwardly through the gap between the second and third rollers. The auxiliary device is then removed and the leading edge of the lap sheet introduced between the third and fourth calender rollers for delivery to a winding roller.

Abstract: The carriers which carry the roving bobbins are moved from the conveyors which are parallel to the spinning machine on branches which extend laterally into the spinning machine to effect a bobbin changeover of transverse rows of bobbins in the machine. The branches extend angularly, for example, at angles of 45.degree. to 90.degree. to the center plane of the spinning machine and may extend to near the center plane or across the width of the machine.

Abstract: For draft- and trouble-free coiling of a sliver arriving from a deflection roll into a sliver can, there is provided a coiler roll which, in cooperation with a nip or pinch roll, guides the sliver through an infeed funnel and deposits the sliver directly upon sliver coils already located in the sliver can. For this purpose, the circumference of the coiler roll projects by a predetermined amount deeper into the sliver can than the underside or lower surface of a coiler plate.

Abstract: The texturing nozzle is supplied with a heating medium such as hot air during a start-up phase for preheating of the nozzle and the associated parts of the texturing machine. After a predetermined temperature has been reached, superheated steam is delivered via change-over valve and a heater to the nozzle to carry out a texturing operation therein. The changeover valve may be operated to switch over to hot air during a running-down phase of the machine.

Abstract: The card for producing a fiber includes a swift and a doffer which takes the carded fibers off the swift and supplies them to a nip formed between at least two rotating rollers. The fiber web emerging from the nip is deposited on the top run of a transverse conveyor which moves axially of the rolls between guide rollers in order to convey the fiber web laterally away from the card. The conveyor has a shoulder on at least one longitudinal side against which the fiber web may abut during travel along the transverse conveyor.

Abstract: The combing machine has at least one combing head having combing elements and a carrier for a lap roll for combing. Two pairs of transport rollers and a pair of pressing rollers are provided in the path of the lap from the lap roll to the combing elements. A movable deflector or element is also disposed adjacent the pressing rollers for a lap end. An automatic lap change is carried out when the lap has approximately completely unwound from the roll. The transport roller pairs are used to tear the lap therebetween with the resulting lap end advancing to the pressing rollers which is then stopped. After a fresh lap roll is placed in the machine, the forward end of the lap is moved between the transporting rollers and severed to form a second lap end. The deflector element serves to place the end of the fresh lap onto the previous lap end for combining within the pressure rolls.

Abstract: The flat cleaning apparatus employs a comb for loosening fibers and dirt particles carried by the revolving flats of the revolving flat clothing. In addition, a casing which travels across the width of the revolving system has a suction nozzle for drawing up the loosened strips of fibers and dirt particles. In addition, a brush is provided downstream of the suction nozzle which is movable relative to the flats to clean between the flats so as to release deep-seated dirt after the strips are removed. The brush is mounted in a chamber which communicates with the suction nozzle so that a suction force is available for removing the deep-seated dirt brought up by the brush.

Abstract: The removal roll carrier can be inclined at an angle while the carrier is simultaneously moved vertically and while the removal apparatus moves over the line of fiber bales. This has the advantage that flocks can be removed from the bales not only in the horizontal direction but also in an inclined direction. A microprocessor controls the pivoting of the removal apparatus into a predetermined inclined position while simultaneously moving the removal apparatus vertically during movement of the machine frame along the path of the fiber bales.