Patents Assigned to W. Schlafhorst AG & Co.
  • Patent number: 6957578
    Abstract: A yarn sensor (25) for monitoring at least one parameter of a traveling yarn (17), e.g., in spinning and bobbin-winding machines, has a measuring gap (16) and a housing made of a non-conductive plastic material for containing electronic components. The housing surface is covered by a metallic coating such that the electronic components are surrounded by the coating (21). At least a portion of the surface inside the measuring gap (16) is free of the coating (21). The metallic coating is connected with a heat conductor to remove heat via the metallic coating (21). Undesirable effects on the measurement results can be substantially reduced, and the quality of the measurement results can be increased.
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: October 25, 2005
    Assignee: W. Schlafhorst AG & Co.
    Inventor: Olav Birlem
  • Patent number: 6889933
    Abstract: A tube plate supported in a freely rotatable manner in a creel of a cheese-producing textile machine is provided with a tensioning cone that fits into the cheese tube and fixes it. The tube plate includes a base body with the tensioning cone and a clamping ring, axially movable relative to and supported on the base body.
    Type: Grant
    Filed: April 28, 2003
    Date of Patent: May 10, 2005
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Paul Straaten, Dietmar Engelhardt
  • Patent number: 6886322
    Abstract: A yarn withdrawal nozzle for an open-end rotor spinning arrangement, having an inlet funnel and a coaxially arranged structure in the inlet funnel, as well as notches arranged in a spaced-apart manner that are positioned in the traveling direction of a yarn downstream of the coaxially arranged structure. The coaxially arranged structure is comprised of circularly-shaped beads or grooves of different diameters.
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: May 3, 2005
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Thomas Weide, Bert Schlömer
  • Patent number: 6886321
    Abstract: A conduit plate adapter for use with an open-end spinning device, comprising a base body having a central passage bore extending therethrough and a yarn withdrawal nozzle mouth fixedly secured directly in the central passage bore. The conduit plate adapter of the present invention is removably inserted into a conduit plate.
    Type: Grant
    Filed: May 29, 2003
    Date of Patent: May 3, 2005
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Eckhard Sonntag, Rolf Danner, Claus-Dieter Landolt, Michael Spitzer, Brigitte Riede
  • Patent number: 6865874
    Abstract: A method and device 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 by a traveling service unit (16) comprising an auxiliary yarn supply device (21). Each work station comprises a yarn spinning device (3) and a cheese winding device (4) with a creel (9). The auxiliary yarn supply device (21) delivers a starting portion of an auxiliary yarn (24) to a suction nozzle (14), which transfers the auxiliary yarn (24) to a spinning start member (20), after which the suction nozzle (14) pivots to re-take the auxiliary yarn (24) between the supply device (21) and the spinning start member (20) and removes the auxiliary yarn (24) after restarting the spinning operation, whereupon the yarn (7) is brought to the creel (9) of the work station (2).
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: March 15, 2005
    Assignee: W. Schlafhorst AG & Co.
    Inventor: Paul Straaten
  • Patent number: 6865876
    Abstract: A generally cylindrical opening roller unit of an open-end spinning device includes a unitary ring body having card clothing formed of at least one helical groove formed in the ring body, at least one helical ridge between courses of the groove, and saw teeth defined by transverse cuts on the ridge. The roller unit also includes an integrated annular collar that is at least codiametric with the teeth in order to protect the teeth. An integral transition area between the card clothing and the annular collars eliminates the problem of a tooth gap.
    Type: Grant
    Filed: May 29, 2003
    Date of Patent: March 15, 2005
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Claus-Dieter Landolt, Heinz-Georg Wassenhoven
  • Patent number: 6863466
    Abstract: An open-end spinning rotor (3) is supported by its rotor shaft (4) in a spinning-rotor bearing (5) with the rotor shaft (4) detachably connected via a coupling device (29) to a rotor cup (26) such that the rotor shaft (4) remains supported in the spinning-rotor bearing (5) when the rotor cup (26) is removed. The coupling device (29) comprises a magnetic device (30) for fixing rotor shaft (4) and rotor cup (26) axially relative to one another and a mechanical rotational safety mechanism (31) for fixing rotor shaft (4) and rotor cup (26) radially relative to one another.
    Type: Grant
    Filed: May 16, 2001
    Date of Patent: March 8, 2005
    Assignee: W. Schlafhorst AG & Co.
    Inventor: Stephan Bühren
  • Patent number: 6854256
    Abstract: A spinning device comprising a spinning box housing; a spinning rotor having a spinning cup on a rotor shaft; a cover element; a traveling belt acting tangentially on the rotor shaft; a rotor brake; a pivotable expander roller moveable within a maximum pivot angle via a pressure lever system connected to the brake gear of the rotor brake between an operative position when the spinning box is closed in an inoperative position wherein the expander roller is automatically lifted off the tangential belt and the rotor brake is applied to the rotor shaft when the spinning box is opened; a brake and locking lever having a locking recess in contact with an arresting roller arranged on the cover element; and an arrangement in the pressure lever system for absorbing shock-like forces acting on the expander roller and for preventing the forces from being transmitted to the brake and locking lever.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: February 15, 2005
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Heinz-Georg Wassenhoven, Michael Spitzer, Dieter Haaken, Harry Gatzke, Detlef Schelter, Elisabeth Klaczynski, Hans-Josef Schröder
  • Publication number: 20050011178
    Abstract: A yarn withdrawal nozzle for an open-end rotor spinning arrangement, having an inlet funnel and a coaxially arranged structure in the inlet funnel, as well as notches arranged in a spaced-apart manner that are positioned in the traveling direction of a yarn downstream of the coaxially arranged structure. The coaxially arranged structure is comprised of circularly-shaped beads or grooves of different diameters.
    Type: Application
    Filed: July 16, 2003
    Publication date: January 20, 2005
    Applicant: W. Schlafhorst AG & Co.
    Inventors: Thomas Weide, Bert Schlomer
  • Patent number: 6820407
    Abstract: An opening arrangement for an open-end spinning device with a rotating opening roller having opening elements stationarily arranged on its circumference for opening a delivered sliver into individual fibers and for combing out the fibers at a comb-out point. The opening roller has a mechanical stripping arrangement that rotates along with it. The stripping arrangement includes ejectors that are pivotably fastened on the opening roller. Each ejector is arranged between the opening elements and extends over the opening roller transversely in relation to the direction of rotation. The ejector strips combed-out fibers off the opening elements and improves the opening of the opening roller as well as the transfer of the fibers from the opening roller. The opening arrangement is advantageously employed with an open-end spinning frame.
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: November 23, 2004
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Helmut Feuerlohn, Thomas Weide
  • Patent number: 6817169
    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: Grant
    Filed: August 9, 2002
    Date of Patent: November 16, 2004
    Assignee: W. Schlafhorst AG & Co.
    Inventor: Paul Straaten
  • Patent number: 6804945
    Abstract: An open-end rotor spinning machine having at least two identical work stations, wherein each work station comprises an open-end spinning device for producing a yarn, a winding device with a creel, a yarn cross-winding device for producing a cheese, a vacuum-chargeable, pivotably seated suction nozzle having a yarn catch element arranged thereon, a device for preparing a yarn for piecing, and a stationary yarn guide device wherein the stationary yarn guide device and the yarn catch element are cooperatively arranged for retrieving the yarn from the cheese and transferring the yarn to the open-end spinning device.
    Type: Grant
    Filed: August 8, 2002
    Date of Patent: October 19, 2004
    Assignee: W. Schlafhorst AG & Co.
    Inventor: Paul Straaten
  • Patent number: 6796116
    Abstract: An open-end spinning device with an opening device for opening continuously supplied sliver material by means of a rapidly running opening cylinder, which opening device is arranged in front of a sliver spreading device (78) with cooperating pairs of spreading cylinders. The spreading cylinders (79, 80, 81, 82) comprise flanges that engage into recesses of the opposing spreading cylinder. The spacing between the particular cooperating spreading cylinders (79, 80, 81, 82) can be periodically varied. An unobjectionable opening process with a low speed of the opening cylinder and with a widened opening cylinder can be achieved with the sliver spreading device (78) of the invention which process is associated with a high-precision dosing and high yarn uniformity.
    Type: Grant
    Filed: July 19, 2002
    Date of Patent: September 28, 2004
    Assignee: W. Schlafhorst AG & Co.
    Inventor: Hans Raasch
  • Patent number: 6792744
    Abstract: A spinning device for producing a spun yarn by a circulating air flow in a housing has an adjustment device (17) for controlling the angular position of the fiber ends wrapped around a spindle head, and in turn, the angular position of the fibers wrapped around the produced yarn, by adjusting a linear component of an air flow into the spinning device as a function of the yarn withdrawal speed, whereby a yarn is produced of a required yarn strength even during a spinning start phase in the process of making the spun yarn.
    Type: Grant
    Filed: January 16, 2003
    Date of Patent: September 21, 2004
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Helmut Feuerlohn, Thomas Weide
  • Patent number: 6789381
    Abstract: A yarn splicing device with a splicing channel that can be charged with compressed air for the pneumatic connection of two yarn ends. The yarn splicing device has two rotatably seated prism elements, each of which is pivotable between a non-splicing position and a splicing position. The two prism elements are designed such that in the splicing position, a splicing channel is formed between them.
    Type: Grant
    Filed: October 10, 2002
    Date of Patent: September 14, 2004
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Wolfgang Irmen, Bernhard Schmitz, Norbert Corres
  • Patent number: 6744498
    Abstract: Yarn impurities are detectable by a method and device wherein a first diameterdependent signal is obtained in a first measurement of a linearly traveling yarn, the intensity of the light for a second measurement is set as a function of the first signal to compensate for the effect of the yarn diameter on the light reflected by the yarn and then the second electrical signal can be directly evaluated for detecting yarn impurities. The invention improves the detection of impurities, for example in connection with spinning and bobbin winding machines.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: June 1, 2004
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Herbert Henze, Olav Birlem
  • Patent number: 6722118
    Abstract: It is the object of the invention to propose a method for open-end rotor spinning, wherein the formation of cover yarn, in particular the so-called “belly bands”, is at least appreciably reduced. In accordance with the invention, the fiber flow exiting a fiber guide channel has a directional component in the direction of rotation of the rotor, while the yarn leg (3) extending, from the draw-off nozzle to the rotor groove, is curved opposite the direction of rotation of the rotor, at least near the rotor groove (1), during the spinning process. The creation of this direction of curvature of the yarn leg (3) takes place during the piecing process.
    Type: Grant
    Filed: June 21, 2002
    Date of Patent: April 20, 2004
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Jürgen Meyer, Manfred Lassmann
  • Patent number: 6720695
    Abstract: A rotor spinning device with a contactless passive radial bearing for the spinning rotor. A damping device exerts magnetic forces on the rotor shaft (9) of the spinning rotor by means of operating elements (11, 12), and in this manner damps radially directed oscillations of the spinning rotor. The stationary operating elements (11, 12), which are embodied as magnetic elements, act directly on a magnetic element (8), which is fixedly connected with the rotor shaft (9), wherein the magnetic element (8) is an operative element of the passive bearing of the spinning rotor. A rapid, effective damping of the oscillations is possible without large expenditures.
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: April 13, 2004
    Assignee: W. Schlafhorst AG & Co.
    Inventor: Norbert Coenen
  • Patent number: 6702223
    Abstract: A winding head of a cheese-producing textile machine, having a device for the accurate determination of the length of yarn traveling through a measuring head (7), and having an evaluating device for accumulating the yarn lengths that have passed. The winding head has a device for determining yarn length portions which are removed in the course of a yarn connecting process. The evaluation device is adapted to subtract the removed yarn lengths from the total length of the yarn (2) which has passed through the measuring head.
    Type: Grant
    Filed: April 15, 2002
    Date of Patent: March 9, 2004
    Assignee: W. Schlafhorst AG & Co.
    Inventors: Andreas Krüger, Christian Sturm
  • Patent number: 6694718
    Abstract: A yarn splicing device for producing a knot-free yarn connection, particularly with elastic yarns, comprises a splicing body (25) formed with a splicing channel (26) to receive the yarns to be spliced and having at least one compressed air inlet opening (29) for pneumatic splicing of their constituent fibers. Yarn clamping devices (43, 44) and cutting devices (41, 42) are provided adjacent the splicing channel. Preparatory nozzles (53, 54) act to prepare the yarn ends for splicing and pneumatically hold the yarn ends to be spliced. Restraining devices (49; 50) are arranged along the splicing extent of the yarn between the clamping devices (43; 44) and the preparatory nozzles (53; 54) to pneumatically resist contraction of the yarn ends up to the preparatory nozzle (53; 54). The number of unsuccessful yarn splicing attempts with elastic yarns thereby can be reduced.
    Type: Grant
    Filed: May 22, 2002
    Date of Patent: February 24, 2004
    Assignee: W. Schlafhorst AG & Co.
    Inventor: Baldur Humml