Abstract: In addition to removing noil from a combing machine, the lap pieces which occur during a lap change operation are suctioned off and recycled into the combing process so as to reduce the amount of waste generated by the combing process. The noil and lap pieces can be removed from the combing heads through a common suction tube and conveyed separately via connecting pipes to separate points. The lap pieces which have been separated can be transported into a drum separator with the fiber material of the lap pieces being separated and recycled for the production of new laps.

Abstract: An apparatus for controlling a fiber processing plant including a series of processing stages in order to supply fibrous material as a product with predetermined qualities, whereby the qualities of the product can be influenced by suitable, selectively adjustable treatment of fibrous material during its passage through the plant and whereby in at least one of the intermediate stages of the plant an ascertainable quality of the product of this stage is determined. In this intermediate stage a signal is obtained which is equivalent to the ascertainable quality and which is used for controlling the previous stages.

Abstract: Combing machine. The combing machine includes a process control computer for the preparatory machine of a textile spinning mill, the former being located upstream of a combing machine which reacts to signals from the combing machine, which signals are representative both of the evenness of feed material supplied to a controlled drafting arrangement as well as of the comber waste share, with the computer producing a signal which is indicative of a change in the evenness behavior of the machines located upstream of the combing machine when the evenness of the feed material changes while the comber waste share remains unchanged. A method for operating the combing machine is also set forth.

Abstract: In addition to removing noil from a combing machine, the lap pieces which occur during a lap change operation are suctioned off and recycled into the combing process so as to reduce the amount of waste generated by the combing process. The noil and lap pieces can be removed from the combing heads through a common suction tube and conveyed separately via connecting pipes to separate points. The lap pieces which have been separated can be transported into a drum separator with the fiber material of the lap pieces being separated and recycled for the production of new laps.

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: 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: The lap winder has two rotatable lap rollers which support a lap during winding. A drive motor drives the lap rollers through the intermediary of a transmission or gearing. A brake mechanism acts on at least one of the lap rollers or on an element co-rotating or fixedly connected for rotation with one of the lap rollers. When the lap winder stops then the brake mechanism is actuated and takes-up the kinetic energy of the lap rollers and that of the lap supported on the lap rollers. The braking forces for the lap rollers and for the lap therefore do not have to be transmitted through the transmission or gearing. There are thus avoided heavy loading and wear of the transmission or gearing.

Abstract: The combing machine comprises a continuously rotatable circular-comb cylinder carrying a circular-comb segment and detaching segment. The detaching segment cooperates with a detaching pressure roll. The combing machine also contains a nipper unit comprising a lower nipper which is stationary relative to the axis of the continuously rotatable circular-comb cylinder, and an upper nipper which is movable relative to the lower nipper. The fibers detached by the detaching segment together with the detaching pressure roll are sucked as fiber clusters into a suction shaft or tube, or can be united to form a sliver at a rotatable screening or sieve drum. The suction shaft includes a flexible membrane to close the shaft. The combining machine is of simple construction and economical to manufacture and renders possible a high operating speed and, therefore, a higher output, particularly in the absence of a top comb between the lower nipper and the detaching pressure roll.

Abstract: The combing machine comprises a continuously rotatable circular-comb cylinder carrying a circular-comb segment and a detaching segment. The detaching segment cooperates with a detaching pressure roll. The combing machine also contains a nipper unit comprising a lower nipper which is stationary relative to the axis of the continuously rotatable circular-comb cylinder, and an upper nipper which is movable relative to the lower nipper. The fibers detached by the detaching segment together with the detaching pressure roll are sucked as fiber clusters into a suction shaft or tube, or can be united to form a sliver at a rotatable screening or sieve drum. The combing machine is of simple construction and economical to manufacture and renders possible a high operating speed and, therefore, a higher output, particularly in the absence of a top comb between the lower nipper and the detaching pressure roll.

Abstract: The combing machine comprises a nipper unit possessing a bottom nipper and a top nipper which is pivotable relative to the bottom nipper about a pivot axle. An additional nipper is pivotable relative to the bottom nipper about a shaft or journal which extends at a suitable distance from and substantially parallel to the pivot axle of the top nipper. The additional nipper is coupled to the top nipper by means of at least one link. In this manner, pivoting movements of the top nipper cause the additional nipper to be pivoted each time in the opposite direction with respect to the direction of motion of the bottom nipper. When the nipper unit is in an advanced end position, the top nipper is open and the additional nipper is closed. The additional nipper firmly holds the lap, and a tuft combed out of the latter is detached by a detaching roll. No separate pivot drive is required for the additional nipper.

Abstract: A drafting mechanism for spinning machines for drafting a staple fiber web, a staple fiber sliver or a staple fiber slubbing has at least an input roller pair, two intermediate roller pairs, and an output roller pair each having a lower roller and a pressure roller, a first group of support elements arranged to receive the lower rollers at their both ends and a second group of support elements arranged to receive the pressure rollers at their both ends, and the support elements receiving the lower rollers and/or the support elements receiving the pressure rollers are connectable to each other on both sides of the rollers by respective connecting elements.

Abstract: A winding apparatus for forming laps has two winding rollers and on each side thereof a carrier arm for receiving a lap bobbin. Each carrier arm is pivotably connected on one end with a sliding guide and on the other end with a pivoting mechanism. A hinge joint and a pivot pin provide these pivotal connections. The pivot mechanism is pivotally supported in side walls of the apparatus by shafts. The pivotal movement is accomplished by a pressure air cyclinder. During pivoting of the pivoting mechanism about the shafts the carrier arms are shifted in a predetermined direction. In FIG. 1, the lowermost position of the therein depicted carrier arm is shown in which the lap bobbin rests on the winding rollers. Through rotation of the winding rollers the lap bobbin rotated and takes up a web delivered from calender rollers for the formation of a lap. The build-up of the lap causes lifting of the carrier arms in such predetermined direction.

Abstract: A filter drum is screened off at the matted fibers take-off position on its interior face via a sealing membrane which is pressed by support sheets and a tightening element against the interior face. The drum is positioned within a housing whose interior is subjected to a suction force and is sealed off from the atmosphere by lip seals. A gap between a compression roll and a take-off roll is tightly filled by the compressed layer of matted fibers so that the entry of leakage air is prevented.

Abstract: An apparatus for controlling the working conditions between two rotating cylinders equipped with a point clothing wherein complete elimination of the disturbing influences of the centrifugal force and the increase in temperature of the cylinders onto the working conditions is achieved.

Abstract: The present invention concerns a method for processing a fiber sliver in a drafting arrangement, and a drafting arrangement for implementing the method. The objective for a drafting arrangement, which can be adapted to a wide range of staple lengths, to draft a fiber sliver at high speeds, has led to the following features of the invention:(a) The fiber sliver is deflected simultaneously in the drafting process systematically in such a manner that, the fiber sliver can be inserted into the subsequently arranged funnel and the subsequently arranged pair of calender rolls without further deflection.(b) All bottom rolls are fixedly arranged.(c) The first pressure rolls limiting the pre-drafting zone and the main drafting zone, respectively, are arranged to be shiftable along an arc about the rotational axis of the corresponding bottom roll in such a manner that the drafting zones are adaptable to the fiber length.

Abstract: The working conditions between two rotating cylinders (4,5), which are provided with a point clothing (9,19) and are processing or mutually transferring a fibre web, of a processing machine of the staple fibre spinning plant are always maintained on a predetermined value by adapting the distance between the surfaces of the two cylinders (4,5). For this purpose moving means (21) are used, which permit very precise setting of the distance between the rotational axes (8,14) of the two cylinders (4,5), and which are controlled by control means (22). To the control means (22) the measuring signal of a characteristic directly connected with the diameter of one of the cylinders (4 or 5), as scanned by a measuring element (25), is transmitted, and the control means (22) control the moving elements (21) in function of this characteristic. Thus complete elimination of the disturbing influences of the centrifugal force and of the increase in temperature of the cylinders onto the working conditions is achieved.

Abstract: A web crushing arrangement for a card web comprises cooperating working rolls (6,7) which are supported by a pressure-loadable support member (23), elastic pressure transmitting means (26,29) being provided between the working roll (7) and the support member (23). By supplying compressed air between the surface of the working roll (7) and the pressing surface (27), of the pressing slat (26) facing and shaped to be complementary to it, an air film is generated between the complementary surfaces.