On Open-end Machine Patents (Class 57/263)
  • Publication number: 20030038205
    Abstract: A service unit for the automatic servicing of work stations of a textile machine for manufacturing cheeses, in particular for an open-end rotor spinning machine. The service unit comprises a pneumatic auxiliary yarn supply and removal device with a pivotably supported yarn supply tube and a yarn cutting device.
    Type: Application
    Filed: August 20, 2002
    Publication date: February 27, 2003
    Applicant: W. Schlafhorst AG & Co.
    Inventor: Heinz-Josef Peuker
  • Publication number: 20030029153
    Abstract: A service unit for restarting a spinning operation at work stations (2) of an open-end spinning machine (1) after replacement of a cheese (8) with an empty tube in the winding device of a work station, comprises an auxiliary yarn supply device (21) and a yarn moving device (23) for fixing a new spinning yarn on the tube. The yarn moving device (23) is movable from a resting position (R) entraining the auxiliary yarn (24) to the winding device (4), and, after restarting the spinning operation, for positioning the yarn (7) connected to the auxiliary yarn (24) in a slot created by a tube plate opener (32) of the service unit between one of the tube plates (30) of the winding device (4) and an end of the tube (10). The yarn (7) is subsequently severed by a cutting device (31), and stored intermediately in a storage device (55).
    Type: Application
    Filed: August 9, 2002
    Publication date: February 13, 2003
    Applicant: W. Schlafhorst AG & Co.
    Inventor: Paul Straaten
  • Patent number: 6412266
    Abstract: In a spinning machine with at least one spinning station possessing a feed drum, driven by a single drive, a disintegrator, a rotor, a withdrawal roll and a spool roll, provisions have been made that the spinning station has an additional single drive respectively for the withdrawal roll and/or the spool roll and/or a paraffin roll. The speed of rotation ratio of the single drives can be preset to specified values.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: July 2, 2002
    Assignee: Rieter Ingolstadt Spinnereimaschinenbau AG
    Inventors: Anton Paweletz, Bernd Bahlmann, Erich Bock, Edmund Schuller
  • Patent number: 6363705
    Abstract: A method for spinning fibers onto the free ends of the two threads of a yarn that is produced during an integrated spinning and twisting process and a two-for-one spinning and twisting apparatus for performing the method are provided. The method includes gripping a twisted yarn, separating two threads of the twisted yarn in a manner such that the twist which was originally present in each individual thread prior to the doubling of the thread with the other thread returns to the now separated thread portion, and forming a thread loop of each separated thread portion. Each thread loop is clamped and respective portions of the two branches of the thread loop extend to a spinning rotor and the spindle hollow axle. Spinning is commenced in coordination with winding and the thread loop is dissolved as the now joined thread is drawn into the spindle hollow axle.
    Type: Grant
    Filed: April 30, 2001
    Date of Patent: April 2, 2002
    Assignee: Volkmann GmbH
    Inventor: Siegfried Brenk
  • Patent number: 6339921
    Abstract: A piecing device with an evaluation arrangement for determining parameters of an automatic piecing process at a spinning station (1) of an open-end spinning frame, wherein a control device is provided which, initially in a test phase, controls the creation of at least one test piecing without a supplementary delivery of additional fiber and the subsequent removal of the created test piecing. The evaluation device is designed for determining the length of a thinner extent of the test piecing downstream of the test piecing as viewed in the direction of yarn travel, and for the determination from the detected length of the thinner extent an amount of supplementary delivery of additional fiber required for compensating the thinner extent. A reduction of the draft which is effective during the test phase assures an interference-free checking of the test piecing. The optimization phase for piecings is shortened and leads to a more accurate result when determining the supplementary delivery of additional fiber.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: January 22, 2002
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Manfred Lassmann, Heribert Mertens
  • Patent number: 6321521
    Abstract: For the purpose of cleaning an open-end spinning rotor, the fiber feed is usually interrupted and the open-end spinning rotor slowed down. Subsequently, in the case of many embodiments, after a cover is removed from the vacuum chamber, cleaning elements are inserted into the exposed rotor cup. According to the present invention, it is provided that before the open-end spinning rotor is actually uncovered, namely before it comes to a standstill, the cover is moved just a short distance away from the vacuum chamber and thereafter, that the vacuum chamber is again closed over momentarily. In this way, a fiber ring present in the inside of the rotor cup can be more easily removed before the actual cleaning of the open-end spinning rotor.
    Type: Grant
    Filed: November 14, 2000
    Date of Patent: November 27, 2001
    Inventor: Mathias Burchert
  • Patent number: 6314712
    Abstract: The present invention relates to a process for the control of the piecing process in a spinning device, in particular an open-end spinning device with rotors, as well as to a device to carry out the process. It is the object of the present invention to make it possible to trigger the piecing process without having to change the structure of the rotor or of the bearing disks of a spinning device. This problem is solved in that the piecing process is carried out and/or controlled in function of physical magnitudes or states and/or their changes in a spinning device. According to the invention, the device is provided with a measuring device to detect physical magnitudes connected with the control of the piecing process.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: November 13, 2001
    Assignee: Rieter Ingolstadt Spinnereimaschinenbau AG
    Inventor: Wolfgang Thierron
  • Patent number: 6298648
    Abstract: Multiple twist spindle to impart two+two twists to textile yarns and threads, whether they be continuous filaments or discontinuous fibres, the spindle comprising a spindle support (16) which supports a support (13) for the feed bobbin (12) maintained substantially stationary and two counter-rotating parts, respectively the inner rotary part (18a) and the outer rotary part (18b), the counter-rotating parts (18a, 18b) being coaxial to each other and substantially coaxial to the axis (19) of the spindle (10), the thread (F) unwinding from the feed bobbin (12) and leaving the inversion element (15) located above the bobbin (12) is induced by the counter-rotating parts (18a, 18b) to follow a path which first descends and then ascends, and then sent to collection means, the paths defining respectively an inner balloon (11a) and an outer balloon (11b) rotating outside the feed bobbin (12), the thread (F) receiving two twists for each revolution of each of the counter-rotating parts (18a, 18b), there being incl
    Type: Grant
    Filed: December 3, 1999
    Date of Patent: October 9, 2001
    Inventor: Armando D'Agnolo
  • Patent number: 6276122
    Abstract: The invention concerns an apparatus for the guidance of a spun thread in a spinning station, wherein, after the thread has been produced, it runs in its travel direction through a withdrawal device, a measuring instrument, and a traversing apparatus. The invention makes possible a smooth and stable thread guidance between the withdrawal device and the traversing apparatus, so that both the run of the thread and the quality of wound filament of the thread can be monitored. Between the measuring instrument and the traverse apparatus, at least one deflection roll is provided.
    Type: Grant
    Filed: October 27, 1999
    Date of Patent: August 21, 2001
    Assignee: Rieter Ingolstadt Spinnereimaschinenbau AG
    Inventors: Thorsten Büchner, Bernd Bahlmann, Edmund Schuller
  • Patent number: 6272832
    Abstract: A service unit (16) for a cheese-producing textile machine (1), in particular an open-end spinning machine, has manipulation devices for repairing ordinary yarn breaks, an auxiliary yarn transport device (34) for piecing yarn following a cheese/empty tube exchange, and a control device (24) storing a first program with optimal operating parameters for piecing an ordinary yarn break and a second program setting differing operating parameters for producing a safety piecing following a cheese/empty tube exchange.
    Type: Grant
    Filed: April 19, 2000
    Date of Patent: August 14, 2001
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Heinz-Dieter Göbbels, Bert Hurtz
  • Patent number: 6226971
    Abstract: In regard to maintenance services at work station, which is located within the maintenance area of a programmable maintenance device along a plurality of similar work stations, attempts of the same maintenance, which have failed at various work stations have been counted. After reaching a specified number of similar failed maintenance procedures, at various work stations (10, 10a, 10b, 10c) a preset function, for instance an alarm, is released. On the other hand, where successful maintenance procedures have been executed, the numbering of the failed attempts reverts to the zero point.
    Type: Grant
    Filed: May 19, 1999
    Date of Patent: May 8, 2001
    Assignee: Rieter Ingolstadt Spinnereimaschinenbau AG
    Inventor: Adalbert Stephan
  • Patent number: 6220009
    Abstract: A damping device for the spinning rotor (3) of an open-end spinning device (1). The spinning rotor (3) is fixed radially and axially via a magnet support arrangement (43), supported in a galvanically separated manner as regards the housing of the spinning device (1) and rotates with a high rotary frequency. The damping device (42) converts oscillations occurring especially during the acceleration phase and when passing through the natural frequency range directly into friction losses.
    Type: Grant
    Filed: April 27, 1999
    Date of Patent: April 24, 2001
    Assignee: W. Schlafhorst AG & Co.
    Inventor: Norbert Coenen
  • Patent number: 6212868
    Abstract: The spinning rotors of open-end spinning aggregates are supported on supporting discs. For the purposes of non-contact revolution counting, a front side of a supporting disc is provided with at least one permanent magnet. A signal receiver of a maintenance device selectively arrangeable at the spinning aggregates is arranged at the permanent magnet. The distance between the permanent magnet and the signal receiver is bridged by a ferromagnetic information transmitter, which is preferably arranged on a swivelling housing section of the spinning aggregate.
    Type: Grant
    Filed: November 17, 1999
    Date of Patent: April 10, 2001
    Inventor: Hans Braxmeier
  • Patent number: 6199359
    Abstract: A positioning unit for a yarn splicer mountable to a creel in a yarn winding operation includes a rolling unit attachable to the creel, a main support member secured to the rolling unit, and a slide unit supporting the yarn splicer. The slide unit is slidably mounted to the main support member. In one arrangement, the main support member includes an air cylinder, and the slide unit includes an actuator driven by the air cylinder. In another arrangement, the slide unit is secured to the main support member for manual positioning by a creel attendant and is supported by a counterweight assembly. The positioning unit enables a creel attendant to easily and readily position a mechanical splicer or the like relative to yarn packages on a creel to facilitate yarn package maintenance.
    Type: Grant
    Filed: January 29, 1999
    Date of Patent: March 13, 2001
    Assignee: Cone Mills Corporation
    Inventors: Rubin Hart, Maurice Willis
  • Patent number: 6101803
    Abstract: For piecing a yarn end at a spinning station of an open-end rotor spinning machine, the previously stopped feed roller is re-activated for a short pre-feeding period. The fiber beard, which has been thinned out by the still rotating open roller, can thus renew itself. The fibers which are combed during this pre-feeding period are removed as waste when the spinning rotor is at a standstill. After completion of the pre-feeding period, the feed roller is rotated in reverse so far back until the fiber beard leaves the area of effect of the opening roller. The feed roller is activated again for the actual piecing process.
    Type: Grant
    Filed: March 22, 1999
    Date of Patent: August 15, 2000
    Assignee: Novibra GmbH
    Inventors: Gerd Stahlecker, Hans Braxmeier
  • Patent number: 6079195
    Abstract: A procedure is described in which an open-end rotor spinning machine already in operation can be modernized by means of re-equipping it with new parts. This machine comprises device means for interrupting the spinning process at a spinning station for the purpose of a doffing operation. The machine comprises a doffing arrangement which is movable relative to the spinning stations, which doffing arrangement comprises devices for exchanging a full bobbin for an empty yarn-winding tube. The machine comprises further at least one piecing arrangement movable in relation to the spinning stations, which is designed to restart spinning at the spinning station with a starting winding already connected to the yarn-winding tube. It is an object of the modernization that the piecing arrangement is replaced with a new piecing arrangement, which is designed to restart spinning with a starting yarn which is not connected to the yarn-winding tube, and subsequently to attach a newly spun yarn to the yarn-winding tube.
    Type: Grant
    Filed: April 22, 1999
    Date of Patent: June 27, 2000
    Assignees: Fritz Stahlecker, Hans Stahlecker
    Inventor: Gerd Stahlecker
  • Patent number: 6035622
    Abstract: In a method and apparatus for determining a variation in criteria, parameters and/or command values of an automatic piecing operation at an automatic piecing apparatus of an automatic spinner, a piecer and/or a length of thread in which the piecer is located is measured in accordance with criteria of diameter or diameter per unit of length and evaluated for improving the piecer, with at least one sensor disposed in a thread travel path, upon resumption of winding after a piecing operation in which a spun yarn is received. A piece of thread containing the piecer is scanned by measuring with the at least one sensor in terms of location of thick and/or thin places with respect to the piecer at defined measurement points, as further criteria of the piecing operation. The measured data are continuously input into event counters connected downstream of the at least one sensor.
    Type: Grant
    Filed: September 23, 1991
    Date of Patent: March 14, 2000
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Hermann-Josef Fox, Manfred Lassmann
  • Patent number: 6009700
    Abstract: In an open-end spinning machine (1) with a plurality of open-end spinning devices (3), each having a spinning rotor (15) whose rotor shaft (26) is seated in the bearing wedge of an axial thrust-free support disk bearing (27) and is positioned by a magnetic bearing (29), and a service unit (10), which automatically services the spinning devices, a sensor device (41) is provided on the service unit (10), which is connected to the control device (18) of the service unit (10) and checks an identification marker (34) applied to each spinning rotor (15). The control device (18) actuates a yarn piecing operation by the service unit only upon detection of an identification marker (34) identifying the spinning rotor (15) to be compatible with the associated spinning device.
    Type: Grant
    Filed: December 10, 1998
    Date of Patent: January 4, 2000
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Heinz-Georg Wassenhoven, Willi Wassen, Maximilian Preutenborbeck, Claus-Dieter Landolt, John Cundill
  • Patent number: 6009642
    Abstract: This method provides various high-power-ratio snow removal devices which clear paths narrower than the motor vehicles. We use small, light, low-priced, yet also safe, durable devices to clear the narrow swaths. High power ratios result from applying motor vehicle horsepower to small snow removal devices similar to those found on lawn tractors. Such devices may comprise moldboard plows (FIGS. 3, 9, 10, 11, 15, 16), snow throwers (FIGS. 7 and 13), or combinations of both types (FIG. 12 and 17). Quick-connect and quick-release fittings (FIGS. 3A, 3B, 6, 8, 9A, 9B, 14) position each device for temporary propulsion by a vehicle. The connectors allow quick conversion of the family car to a plowing machine, and when plowing is done, quick re-conversion. A moldboard plow of about half the car's width (FIG. 3) is our preferred embodiment. The mini-moldboard (FIG. 10) is least expensive. Deepest snow can be handled by our tall, narrow moldboard (FIG. 15).
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: January 4, 2000
    Inventor: Gordon W. Nugent
  • Patent number: 6003295
    Abstract: In order that stray fibers do not settle in the rotor during the spinning start process at the spinning box of a rotor spinning machine, an openable air valve is provided for initially cleaned the rotor by delivering an air current into the rotor either by drawing ambient air through the valve as a consequence of the spinning vacuum or by blowing in compressed air through the valve. As an alternative to known spring-loaded ball valves pose the danger that the spring ceases to perform due to deposits of dust and fibers, the present invention provides a magnet arranged in association with the valve seat in the area of its valve opening to attract the ball, which consists of a magnetizable material, and thereby hold the ball in closed position.
    Type: Grant
    Filed: May 14, 1998
    Date of Patent: December 21, 1999
    Assignee: W. Schlafhorst AG & Co.
    Inventor: Brigitte Riede
  • Patent number: 5964084
    Abstract: An open-end spinning device (1) has a spinning rotor (2) supported by its rotor shaft (3) in the bearing wedges (4, 4') of a supporting plate bearing (5). A rotor brake (12) arranged in the area of the supporting plate bearing (4) has brake elements (13) operable vertically downwardly on the rotor shaft (3). The brake elements (13) of the rotor brake (12) are arranged centered above the respective bearing wedges (4, 4') of the supporting plate bearing (5) and are seated in a box-like component (14) to be linearly displaced in the vertical direction (R).
    Type: Grant
    Filed: April 27, 1998
    Date of Patent: October 12, 1999
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Heinz-Georg Wassenhoven, Bert Schlomer, Lothar Winzen
  • Patent number: 5960623
    Abstract: A side disc (2) for axial introduction onto a support disc (1) for a support disc bearing of the rotor of an open-ended rotor spinning machine having at least one reflecting region on the side of the side disc (2) facing a light source which is being otherwise substantially non-reflecting, wherein the reflecting region in the side disc (2) has one or more reflectors (3) worked into the side disc, is characterized in that the side disc (2) is made from injection moulded transparent and preferentially colourless plastic, and the reflectors (3) are fashioned on the side of the side disc (2) facing away from the light source in a form of cats-eye structures, and the region of the formed reflectors (3) is stepped-back with respect to other portions of the side of the side disc (2) facing away from the light source, and a fitted member (5) is provided for which is mounted into a recess (6) of the side disc (2) containing the reflector (3) and which completely covers, in a dust-tight manner, the region of the corres
    Type: Grant
    Filed: October 21, 1998
    Date of Patent: October 5, 1999
    Inventor: Friedrich Legrom
  • Patent number: 5927061
    Abstract: The present invention relates to a process to piece a yarn (2) to an open-end spinning device (1), in which a plurality of handling devices (4) on a service unit (3) traveling alongside a plurality of identical open-end spinning devices (1) execute different work motions and in which a yarn end is taken over by a presentation device (31) and is conveyed to the open-end spinning device (1), and is then returned into same for piecing. In this process all the handling devices (4) go through a joint motion phase and if necessary through an individual motion phase. To carry out this process the handling devices (4) are mounted on a common bearing device (5) which can be moved back and forth between at least two work positions (I, II) by means of a drive arrangement (50) controlled by the control device (6).
    Type: Grant
    Filed: August 12, 1997
    Date of Patent: July 27, 1999
    Assignee: Rieter Ingolstadt Spinnereimaschinenbau AG
    Inventor: Dietmar Greis
  • Patent number: 5916118
    Abstract: So that stray fibers do not become attached to the rotor during a yam piecing process in the spinning box of a rotor spinning machine, the rotor may be cleaned by an air flow generated by drawing air into the rotor by the prevailing spinning vacuum or by blowing compressed air into the rotor through a closable opening in the rotor chamber. To avoid the danger that soiling of the closure of the opening will permit aspiration of secondary air and impair control of the air supply, the closure is formed as a slide member with a leading edge configured for cleaning the opening during closing movement.
    Type: Grant
    Filed: March 5, 1998
    Date of Patent: June 29, 1999
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Heinz-George Wassenhoven, Jochen Dressen
  • Patent number: 5916119
    Abstract: The present invention relates to a device for the control of an air stream in an open-end spinning device (6). The open-end spinning device (6) is equipped with an air channel (8) opening into the second housing compartment (600) of the open-end spinning device (6), which is connected via a valve (82) to a connection opening (83). An air channel (95) with a presentation end (950) located on a traveling service carriage (9) can be presented to this connection opening (83). This presentation end (950) is connected by means of a movable intermediate segment (951) to the air channel (95) and is capable of movement relative to same so that when the connection opening (83) is swiveled, it follows this movement without changing its position relative to the connection opening (83).
    Type: Grant
    Filed: July 23, 1997
    Date of Patent: June 29, 1999
    Assignee: Rieter Ingolstadt Spinnereimaschinenbau AG
    Inventors: Kurt Lovas, Edmund Schuller
  • Patent number: 5867975
    Abstract: The present invention concerns an apparatus, in particular a cover for a rotor (51), for the initiation of the spinning of a thread in an open-end spinning apparatus (1), which apparatus possesses a fiber feed conduit (6) which extends from a disintegrating apparatus (4) to a spin rotor (50), which is installed in a rotor housing (5) in combination with a controllable vacuum source, and which rotor (50) is covered with a rotor cover (51) which also accepts the fiber feed conduit (6), at least partially. The apparatus exhibits further a service wagon (2) for the open-end spinning apparatus (1), which wagon carries a suction line (20) to a connection piece (7) of the open-end spinning apparatus (1). The connection piece (7) is in communication with a connection opening (70) in the fiber feed conduit (6) and is in a break-away sealed connection with the rotor cover (51).
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: February 9, 1999
    Assignee: Rieter Ingolstadt Spinnereimaschinenbau AG
    Inventors: Josef Breitenhuber, Anton Furtmeier, Adam Gensberger
  • Patent number: 5865022
    Abstract: A method and apparatus for piecing a broken end of yarn at an open end spinning station utilizing a piecing cart servicing the spinning station. To repair the yarn break, a defined yarn length is unwound off the winding bobbin and is temporarily stored in a yarn reservoir disposed between a yarn draw-off device and a lap drive of the piecing cart. Subsequently, the winding bobbin is acceleratively driven by the lap drive sufficiently in advance of actuating the yarn draw-off device to achieve a predetermined winding speed as of the time the withdrawal of spun yarn from the spinning unit resumes.
    Type: Grant
    Filed: September 8, 1997
    Date of Patent: February 2, 1999
    Inventors: Eike-Thomas Bode, Gerd Jansen
  • Patent number: 5832709
    Abstract: A method includes dividing a yarn into various sections with reference to the pieced yarn section, with each section being characteristic of the piecing process. A yarn profile in each section is measured and evaluated against criteria specific to each section, whereby a yarn defect and its position on the yarn are determined and from which the cause for the defect is determined. The pieced yarn section is also divided into three subsections and each subsection is measured and evaluated against certain subsection criteria for the detection of fluff, trash accumulation and fiber sloughing.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: November 10, 1998
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Manfred Lassmann, Heribert Mertens
  • Patent number: 5809764
    Abstract: A piecing method for a spinning machine wherein, following stoppage of the spinning operations, after cutting the sliver (S) between the usually rotating draft rollers (13) and the stopped draft rollers (12) and before the restarting of drafting and spinning, the sliver (S) is once again cut between the usually rotating draft rollers (13) and the stopped draft rollers (12) by driving the stopped draft rollers (12) for a predetermined period of time and then stopping again, thus sliver (S) is supplied to the twisting part (2) by then driving the stopped draft rollers (12). Therefore, not only can the sliver fiber density of the sliver end supplied to the piecing area during piecing be increased, but that length of the tip of the sliver can also be shortened. Accordingly, the strength of the piecing part is increased and the length of the piecing part can be shortened.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: September 22, 1998
    Assignee: Murata Kikai Kabushiki Kaisha
    Inventor: Kenji Baba
  • Patent number: 5802835
    Abstract: A negative pressure distribution system for a textile spinning machine includes a negative pressure channel and a plurality of lines configured to deliver negative pressure to a device in the textile machine to carry out a desired task. A distributor is disposed between the negative pressure channel and the negative pressure lines. The distributor includes a housing having a variably positionable valve within the housing. The valve is positionable between a closed position wherein the negative pressure lines are pneumatically isolated from the negative pressure channel and a plurality of operable positions wherein at least one of the negative pressure lines is in communication with the negative pressure channel through the housing.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: September 8, 1998
    Assignee: Rieter Ingolstadt Spinnereimaschinenbau AG
    Inventor: Adalbert Stephan
  • Patent number: 5799476
    Abstract: In order to increase the operating efficiency of the spinning machine and in order to generate a response suitable to the hierarchy or quality of the error message in case of an error in the yarn or in another electrical or mechanical device of the spinning machine, the parameter signal of the yarn obtained by a measuring device (20) is transmitted to an evaluating phase (21,22) which emits error message signals. These are attributed in an attribution section (23) to pre-defined error groups (A,B,C,D). Each one of the output signals of the attribution section represents a group of errors and generate (automatically) graduated responses for the elimination of errors.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: September 1, 1998
    Assignee: Rieter Ingolstadt Spinnereimaschinenbau AG
    Inventor: Bernd Bahlmann
  • Patent number: 5787699
    Abstract: An inner rotor 5 has a recess 7 formed at a position corresponding to a navel 6 and the recess 7 has a taper surface 7a formed to the peripheral edge thereof. The end surface 6c of the navel 6 can be moved together with a support member 12 to an ordinary spinning position where it can be engaged with a thread Y drawn out through a thread guide and to a thread piecing position where it cannot be engaged therewith. When the thread is pieced, the navel 6 is disposed at the thread piecing position and after a seed thread is introduced into an outer rotor 2 from a thread drawing-out path 6b in the state that both the rotors 2, 5 are rotated, a fiber bundle in a fiber collecting portion 2a is drawn out together with the seed thread and a thread is spun without passing through the thread guide. Thereafter, the navel 6 is moved to the ordinary spinning position.
    Type: Grant
    Filed: July 10, 1996
    Date of Patent: August 4, 1998
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Toshio Morishita, Atsuo Sakakibara
  • Patent number: 5778651
    Abstract: Method and apparatus for spinning-in yarn on an open end spinning machine following a yarn rupture, wherein the machine includes a plurality of operating units which wind yarn on respective bobbins and an attending device movable along the operating units to the unit at which a rupture occurred. Upon a yarn rupture, the winding of the bobbin is halted, and the bobbin is permitted to be unwound a metered length. A detecting nozzle detects the yarn end and sucks in the yarn end and moves away from the bobbin. A catching arm supports the yarn. A tension roller receives the yarn on it. The tension roller is located on a spinning head which is swingable from a position toward the bobbin to a position toward the rotor and the head is then movable to move the yarn on the roller toward the rotor. A clamp on the spinning head clamps the yarn and a trimmer trims the yarn to form the yarn end. An ancillary compensator at the spinning head deflects the yarn to compensate and then releases the yarn.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: July 14, 1998
    Assignee: Rieter Elitex a.s. Usti nad Orlici
    Inventors: Zdenek Spindler, Vojtech Novotny
  • Patent number: 5765770
    Abstract: A textile machine includes a cheese or cross-wound bobbin winder with winding stations each having a creel for holding a cheese, a reversible rotary cheese drive, a suction nozzle and a swivel drive for swivelling the suction nozzle to the jacket surface of the cheese. A method for grasping a yarn end resting on the cheese includes adjusting a search time during which the inward-swivelled suction nozzle is positioned at the reverse-rotating cheese, in dependence on the instantaneous diameter of the cheese, and on the reverse speed of the rotary cheese drive, which is kept constant over the entire search time.
    Type: Grant
    Filed: July 28, 1995
    Date of Patent: June 16, 1998
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Ferdinand-Josef Hermanns, Robert Hartel, Herbert Henze, Karl-Josef Hohne, Herbert Knors, Dietmar Engelhardt, Wilhelm Zitzen, Manfred Veyes, Herbert Merkens, Wolfram Weissenfels, Hermann Rutten, Dirk Jagers, Berndt Pommer
  • Patent number: 5732543
    Abstract: A pneumatic cleaning device (10) for the spinning stations of an open-end spinning machine (1) is disposed on the sliver draw-in arm (22) of a traveling service unit (16) for unitary movement with the draw-in arm between a resting position (I) and an operating position (II). In the operating position (II), two suction nozzles of the cleaning device are positioned in the area of the sliver opening device of a spinning station at which the service unit is positioned. One suction nozzle is pivotable by an electric motor drive acting through a lever linkage arrangement to cover the area below the dirt outlet opening of the sliver opening device.
    Type: Grant
    Filed: August 5, 1996
    Date of Patent: March 31, 1998
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Helmut Bungter, Jurgen Backhaus
  • Patent number: 5694756
    Abstract: When an open-end rotor spinning device is stopped, a short yarn end is produced. For this, and in synchronization with the interruption of fiber feeding to the opener device (116), the fibers which continue to be combed out of the leading end of the fiber sliver (2), as well as the fibers still present in the clothing of the opener device (116), are prevented from continuing to accumulate on the fiber collection surface (136) of the spinning rotor (13). To carry out this process, the device (115) for the stoppage of the fiber feeding device (110) is connected to a control device (3) by means of which a device (134, 135, 172, 173) for the shortening of the yarn end can be switched on temporarily as the spinning device (11) is stopped.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: December 9, 1997
    Assignee: Reiter Ingolstadt Spinnereimaschinenbau AG
    Inventor: Gallus Lindner
  • Patent number: 5682718
    Abstract: A yarn being spun in a spinning station of a spinning machine is drawn off with an apparatus which includes a pair of rollers for clamping the spun yarn in a gap between the rollers and transporting the spun yarn. The rollers include a draw-off roller being driven continuously in a draw-off direction at a given circumferential speed and a switchable feed roller for contacting the draw-off roller and for being driven through friction by the draw-off roller when contacting the draw-off roller. A method for drawing off the spun yarn includes positioning the yarn to be drawn off between the rollers while the feed roller is not contacting the draw-off roller. The feed roller is driven with a fluid in a circumferential direction and accelerated to a circumferential speed being at most the given circumferential speed. The feed roller is then placed in contact with the draw-off roller.
    Type: Grant
    Filed: September 11, 1995
    Date of Patent: November 4, 1997
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Andreas Bennewitz, Michael Stein
  • Patent number: 5676322
    Abstract: In order to form a yarn reserve winding on the edge of a rotating empty winder tube after a doffing action on a package-producing spinning aggregate, the rotational speed of a drive roller which drives the winder tube is kept constant. The delivery speed of a delivery device, which draws the yarn from the spinning aggregate and delivers it to the winder tube, can be regulated. The yarn tension between the delivery device and the winder tube is thus kept constant during the forming of the yarn reserve winding as well as during and after the transfer of the yarn to a traversing device.
    Type: Grant
    Filed: May 7, 1996
    Date of Patent: October 14, 1997
    Assignees: Fritz Stahlecker, Hans Stahlecker
    Inventor: Fritz Stahlecker
  • Patent number: 5640839
    Abstract: A method of spinning-in yarn on open-end spinning machines in which an interruption of the spinning process is followed by the stop of the feed of the sliver (4) into the singling-out device (2) whose combing roller (22) keeps turning, and the rotor is stopped at least during its cleaning. When the rotor (1) has re-started the yarn end is returned to it and brought into contact with the newly formed fiber band. Prior to the re-starting of the rotor (1) and at the latest simultaneously with the start of the feed device (3) of the sliver (4), the surface of the combing roller (22) is acted upon by a pressure air stream acting in the sense of rotation of the combing roller (22) between the place of supply of the sliver (4) to the combing roller (22) and the mouth of the fiber feed channel (212) to the rotor (1) so as to remove from the clothing (221) of the combing roller (22) fibers and sticking impurities. The invention also relates to a device for carrying out the method.
    Type: Grant
    Filed: February 8, 1995
    Date of Patent: June 24, 1997
    Assignee: Rieter Elitex a.s.
    Inventors: Vojtech Novotny, Zdenek Spindler
  • Patent number: 5640838
    Abstract: In preparation of the piecing process in an open-end rotor spinning device, negative pressure is first applied in a housing containing the spinning rotor, and the rotor cover is brought from its operating position into a fiber evacuation position in which it is lifted off from the housing. Fiber feeding is then switched on. The fiber stream produced thereby, together with the air stream which conveys the fibers is deflected and is evacuated by means of the negative pressure prevailing in the housing over the open rotor edge from the interior of the rotor and from the housing, until the rotor cover is brought back into its operating position to convey fibers to the fiber collection groove.
    Type: Grant
    Filed: May 1, 1995
    Date of Patent: June 24, 1997
    Assignee: Rieter Ingolstadt Spinnereimaschinenbau AG
    Inventors: Werner Billner, Josef Breitenhuber
  • Patent number: 5634602
    Abstract: An open end spinning machine with an associated service device having a supplementary yarn conveying device utilizing a delivery tube disposed on a delivery tube holder which can be pivoted into various work positions. A yarn guide plate is movably seated in the area of the delivery tube holder and has a yarn guide notch as well as a yarn placement slit and can be selectively controlled by means of a thrust cylinder. By pivoting the yarn guide plate, the yarn extending through the yarn guide notch is transferred to specially designed yarn catch devices of a tube supporting disk seated in a creel of a work station of the spinning machine. Subsequently, the grasped yarn slides automatically into the yarn placement slit which is disposed below the notch and, while being securely guided in the yarn placement slit, is wound as a reserve winding on the empty tube rotating in the creel.
    Type: Grant
    Filed: November 21, 1995
    Date of Patent: June 3, 1997
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Heinz-Dieter Gobbels, Stephan Kaspers, Hans-Willi Esser, Volker Reichardt
  • Patent number: 5626011
    Abstract: In a method for joining a thread a spindle rotor with hollow spindle shaft is rotatably supported on a machine frame. A radially outwardly extending yarn guide channel is connected to the hollow spindle shaft. Two spinning devices with upwardly open spinning rotors are supported above the spindle rotor symmetrical to the central axis of the spindle rotor. A centering point is positioned on an extension of the central axis of the spindle rotor. A spun yarn is spun in each spinning device from dissolved fiber material and led upwardly away from the spinning rotors, reversed in their direction of movement by 180.degree., and introduced into the hollow spindle axle. The spun yarns form a yarn balloon between the yarn guide channel and the centering point, and twisted yarn is removed from the centering point. The dissolved fiber material is fed to the spinning devices through the yarn balloon.
    Type: Grant
    Filed: September 6, 1995
    Date of Patent: May 6, 1997
    Assignee: Palitex Project-Company GmbH
    Inventors: Ulrich Ballhausen, Guido Spix, Wilfried Rutten
  • Patent number: 5600945
    Abstract: Spinning stations of open-end spinning frames are cleaned from time to time to increase productivity, e.g. each time a sliver can change is made although, if the times between the exchange of two cans are too long, cleaning may be performed at a preset cycle. The sliver must be removed from the spinning station for this purpose. To be able to reintroduce a defined length of the removed sliver into the spinning station at the end of a cleaning operation, the end of the sliver is aspirated from between the draw-in roller and the gripping table of the spinning station by means of an aspiration and blower nozzle and pulled out of the spinning box of the spinning station and, after the cleaning operation, the sliver is introduced into the spinning station by means of the aspiration and blower nozzle. The aspiration nozzle has an insert with bores for causing the tip end of the sliver to assume a particular shape.
    Type: Grant
    Filed: August 14, 1995
    Date of Patent: February 11, 1997
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Waldemar Schmidke, Jurgen Backhaus, Willi Wilms, Harry Gatzke
  • Patent number: 5586427
    Abstract: A yarn draw-off device for use with a spinning machine includes a pressure roller and a rotatably driven draw-off shaft. The pressure roller is in contact with the draw-off shaft and is rotatably driven by the shaft. An adjustable mounting device is provided for the pressure roller. The pressure roller is rotatably mounted on the mounting device. The mounting device is selectively movable relative to the draw-off shaft so as to vary the contact pressure between the pressure roller and the draw-off shaft.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: December 24, 1996
    Assignee: Rieter Ingolstadt Spinnereimaschinenbau AG
    Inventors: Romeo Pohn, Edmund Schuller
  • Patent number: 5584170
    Abstract: In the case of a method for closed-loop controlling the revolutions of an open-end spinning rotor during automatic piecing, the spinning rotor is run up to its operating speed from a standstill by being coupled to a tangential drive belt, which runs at operating speed. The spinning rotor thereby passes through a suitable speed range for piecing, and is kept at this speed range for a predetermined time span by changes in the driving effect of the tangential drive belt. This occurs in that the revolutions of the spinning rotor are measured, and dependent on these readings, the revolutions are closed-loop controlled by device of reducing and increasing the driving effect, for example by device of intermittent activating of the rotor brake.
    Type: Grant
    Filed: January 26, 1995
    Date of Patent: December 17, 1996
    Assignee: Novibra GmbH
    Inventor: Gerd Stahlecker
  • Patent number: 5557916
    Abstract: The process and device for setting optimal piecing parameters in the spinning machine when changing batches includes entering and storing in a memory of a central machine computer spinning machine data relevant to the piecing operation. At the start of the piecing operation, the machine data is transmitted from the central machine computer to a microcomputer of a piecing device. The microcomputer contains a piecing program and a database of piecing parameters pertaining to the piecing process. An optimal set of piecing parameters is computed with the piecing program in the microcomputer. The microcomputer incorporates the spinning machine data and computes from the database an optimal basic set of piecing parameters. The optimal set of piecing parameters is displayed at an optical display unit associated with the microcomputer and can be manually adjusted.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: September 24, 1996
    Assignee: Rieter Ingolstadt Spinnereimaschinenbau AG
    Inventors: Susanne Messmer, Josef Muller
  • Patent number: 5535580
    Abstract: A process and device for piecing in an open-end spinning device includes switching on a fiber feeding device for a predetermined period of time so that fibers which are undesired for piecing are combed out of the leading end of the fiber sliver which is presented to an opener device. The combed out fibers are deflected from the fiber collection surface. The fiber feeding device is switched off after the predetermined period of time once the undesired fibers have been combed out and is maintained in an off condition for a short period of time so that the fibers remaining in the leading end of the fiber silver are only minimally damaged by the opener device. The fiber feeding device is switched back on and the fiber stream is deflected from the fiber collection surface as the stream increases to full strength. The fiber stream is subsequently deflected to the fiber collection surface for piecing in coordination with backfeeding of a yarn end to the fiber collection surface.
    Type: Grant
    Filed: February 7, 1995
    Date of Patent: July 16, 1996
    Assignee: Rieter Ingolstadt Spinnereimaschinenbau AG
    Inventors: Brandl Sebastian, Susanne Messmer, Lindner Gallus
  • Patent number: 5509261
    Abstract: A rotor spinning machine has a plurality of simultaneously operated spinning stations each with a spinning rotor, an opening roller, a feed roller for delivering sliver to the opening roller, and a stepping motor connect directly to the feed roller for driving thereof. An actuating arrangement is provided for selectively actuating each stepping motor in a normal increment mode during spinning operation and in a microincrement mode during yarn piecing operations.
    Type: Grant
    Filed: March 21, 1994
    Date of Patent: April 23, 1996
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Heinz-Georg Wassenhoven, Manfred Lassmann
  • Patent number: 5490375
    Abstract: The invention relates to a method of respinning-in in open-end spinning machines after a bobbin removal from the swinging arms (51, 52) of the bobbin holder (5) or at the beginning of spinning at an empty spinning station, and to a device for carrying out the method. During the fixing of the empty tube (8) between the swinging arms (51, 52) of the bobbin holder (5) at a spinning station at rest, an ancillary yarn (15) is inserted between a swinging arm (51) and the edge of the tube (8) and then gripped the swinging arm (51), then its opposite end is adapted for one spinning-in in an attending device (9) and spun-in, then is this ancillary yarn (15) together with the beginning of the newly spun yarn wound onto the tube (8) as yarn reserve, whereupon the yarn is handed over to the distributing mechanism of the machine for producing a cross-wound bobbin.
    Type: Grant
    Filed: November 30, 1994
    Date of Patent: February 13, 1996
    Assignee: Elitex USTI Nad Orlici
    Inventors: Zdenek Spindler, Frantisek Burysek, Jiri Nemec, Vojtech Novotny, Josef Lasko, Miroslav Blasel, Oldrich Talacko
  • Patent number: 5473879
    Abstract: An open-end spinning machine embodied as a yarn piecing unit for automatically repairing yarn breaks during bobbin winding and for replacing finished bobbins with empty tubes, and an auxiliary yarn transport arrangement for supplying and removing an auxiliary yarn used for the piecing operation. The auxiliary yarn transport arrangement has a yarn supply tube that can be positioned among various operating positions: (a) a first position wherein the auxiliary yarn is transferred to a yarn locating nozzle of the piecing unit; (b) a second operating position wherein the piecing cycle is initiated by spinning an end of the auxiliary yarn with individual fibers fed into the spinning rotor of the spinning machine; and (c) a third operating position wherein the auxiliary yarn and its pieced end is severed from the trailing length of newly spun yarn from the spinning rotor and the new yarn is applied to an empty tube in the winding creel of the spinning machine.
    Type: Grant
    Filed: April 22, 1994
    Date of Patent: December 12, 1995
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Heinz-Dieter Gobbels, Hans Raasch