Patents Assigned to Fritz Stahlecker
  • Patent number: 6360416
    Abstract: Traversing yarn guiding rods in textile machines producing X-packages are often made of carbon fibers for the purpose of reducing the inertia force. These kinds of traversing yarn guiding rods are prone to wear at their bearing points. For this reason, the bearings, having a distance to one another which corresponds to at least twice, preferably three times the traversing stroke, are collectively replaced from time to time, in such a way that the yarn guide rod is supported at different places than before. The replacement bearings are applied staggered to the old bearing points in such a way that the new bearing points now have a distance to the exposed previous bearing points, which distance corresponds to at least one traverse stroke. This results in the replacement bearings acting with a non-worn part of the fiber guiding rod. The life of the yarn guiding rod is thus significantly increased.
    Type: Grant
    Filed: September 15, 1999
    Date of Patent: March 26, 2002
    Assignees: Fritz Stahlecker, Hans Stahlecker
    Inventor: Fritz Stahlecker
  • Patent number: 6336257
    Abstract: The present invention relates to a fine-toothed combing structure of an opening roller for an open-end spining machine. The teeth of the fine-toothed combing structure have a spacing which measures at least three times the height of the teeth. The front angle should not measure more than 10°. This fine-toothed combing structure is preferably used for synthetic fibers.
    Type: Grant
    Filed: April 18, 2000
    Date of Patent: January 8, 2002
    Assignees: Fritz Stahlecker, Hans Stahlecker
    Inventor: Kurt Lang
  • Patent number: 6332245
    Abstract: A condensing zone for condensing a drafted, still twist-free fiber strand is arranged downstream of a front roller pair of a drafting unit of a spinning machine. An air-permeable transport belt transports the fiber strand through the condensing zone. The transport belt slides hereby over a stationary sliding surface, in which a suction slit of a suction channel is located. At the end of the condensing zone, the fiber strand is pressed with the transport belt by a nipping roller to the sliding surface. The nipping roller as well as the front pressure roller of the drafting unit are supported in a top weighting arm. A separate pressure spring is arranged each for the top pressure roller and for the nipping roller. It can be provided that the nipping roller is arranged at a holding device, which can be swivelled around a swivel axle, which lies coaxially to the axle of the front pressure roller.
    Type: Grant
    Filed: January 23, 2001
    Date of Patent: December 25, 2001
    Assignees: Fritz Stahlecker
    Inventor: Hans Stahlecker
  • Patent number: 6327747
    Abstract: In a process for condensing a drafted fiber strand in a condensing zone arranged downstream of a front roller pair of a drafting apparatus, the fiber strand is transported through the condensing zone by means of a perforated, suctioned transport belt. It is hereby provided that the fiber strand has the same direction of motion as the transport belt. Furthermore, it is ensured that a sufficient amount of the fibers located in the fiber strand are still nipped by the front roller pair during condensing. This results in the advantage that the front ends of the fibers of the fiber strand to be condensed do not insert themselves into the perforation of the transport belt, thus leading to clogging.
    Type: Grant
    Filed: May 19, 2000
    Date of Patent: December 11, 2001
    Assignees: Fritz Stahlecker, Hans Stahlecker
    Inventor: Gerd Stahlecker
  • Patent number: 6286295
    Abstract: A yarn withdrawal nozzle for an open-end rotor spinning apparatus comprises a short, funnel-shaped yarn deflecting surface, which begins at a plane front surface and graduates into a yarn withdrawal channel. The radius of curvature of the yarn deflecting surface measures a maximum of 3 mm. The front surface is formed as a tangential surface to the yarn deflecting surface, The small radius of curvature facilitates in particular the spinning of polyester yarns at a high rotor speed.
    Type: Grant
    Filed: January 11, 2000
    Date of Patent: September 11, 2001
    Assignees: Fritz Stahlecker, Hans Stahlecker
    Inventor: Kurt Lang
  • Publication number: 20010014995
    Abstract: A condensing zone for condensing a drafted fiber strand is disposed downstream of a front roller pair of a drafting unit of a ring spinning machine. The condensing zone comprises a stationary sliding surface having a suction slit, over which the fiber strand is transported by an air-permeable transport belt. The condensing zone is bordered on its exit side by a nipping roller disposed on the transport belt. The nipping roller drives the transport belt and is in turn driven by the front pressure roller of the drafting unit. The front pressure roller is, for this purpose, connected with the nipping roller via a drive belt, preferably a toothed belt. The nipping roller and the front pressure roller are arranged on supporting arms which can be spread apart and which tension the drive belt.
    Type: Application
    Filed: February 12, 2001
    Publication date: August 23, 2001
    Applicant: Fritz Stahlecker and Hans Stahlecker
    Inventor: Gerd Stahlecker
  • Publication number: 20010011410
    Abstract: A condensing zone for condensing a drafted, still twist-free fiber strand is arranged downstream of a front roller pair of a drafting unit of a spinning machine. An air-permeable transport belt transports the fiber strand through the condensing zone. The transport belt slides hereby over a stationary sliding surface, in which a suction slit of a suction channel is located. At the end of the condensing zone, the fiber strand is pressed with the transport belt by a nipping roller to the sliding surface. The nipping roller as well as the front pressure roller of the drafting unit are supported in a top weighting arm. A separate pressure spring is arranged each for the top pressure roller and for the nipping roller. It can be provided that the nipping roller is arranged at a holding device, which can be swivelled around a swivel axle, which lies coaxially to the axle of the front pressure roller.
    Type: Application
    Filed: January 23, 2001
    Publication date: August 9, 2001
    Applicant: Fritz Stahlecker and Hans Stahlecker
    Inventor: Hans Stahlecker
  • Publication number: 20010009052
    Abstract: An air-permeable transport belt, drivable by a drive roller, is provided for transporting a fiber strand to be condensed over a sliding surface of a spinning machine condensing zone which includes a suction slit. The transport belt has at least one area arranged to contact the drive roller, which area differs in relation to its surface structure from an area arranged to contact the sliding surface and from an area arranged to contact the fiber strand.
    Type: Application
    Filed: January 17, 2001
    Publication date: July 26, 2001
    Applicant: Fritz Stahlecker and Hans Stahlecker
    Inventor: Fritz Stahlecker
  • Publication number: 20010003324
    Abstract: In order to transport a fiber strand to be pneumatically condensed over a suction slit of a condensing zone of a spinning machine, a transport belt is provided which comprises, at least in the effective area of the suction slit, a porous area. The porous area can, for example, be created by dissolving granulate components from a fine-grained granulate blend.
    Type: Application
    Filed: November 29, 2000
    Publication date: June 14, 2001
    Applicant: Fritz Stahlecker and Hans Stahlecker.
    Inventor: Peter Blankenhorn
  • Patent number: 6209300
    Abstract: A condensing zone for pneumatic condensing of the drafted, still twist-free fiber strand is arranged downstream of the drafting apparatus of a ring spinning machine. The condensing zone is limited by a delivery roller pair, whose driven bottom roller is a suction roller, which is arranged directly downstream of the front roller pair of the drafting apparatus. The fiber strand loops the suction roller at an angle of at least 45°.
    Type: Grant
    Filed: January 7, 2000
    Date of Patent: April 3, 2001
    Assignees: Fritz Stahlecker
    Inventor: Hans Stahlecker
  • Patent number: 6209303
    Abstract: An arrangement and method for spinning a yarn from a plurality of yarn components includes a drafting arrangement, a condensing zone arranged downstream thereof and also a ring spindle which twists all yarn components jointly. The condensing zone has a stationary sliding surface for a perforated transport belt which transports the yarn components through said condensing zone. At least one suction slit is located on the sliding surface, which suction slit extends essentially in a transport direction of the yarn components. The condensing zone is defined on its exit side by a nipping roller, which presses the yarn components and the transport belt onto the sliding surface. The at least one suction slit extends to the nipping point. The yarn components may be a sliver or roving and a core yarn, or two slivers or rovings, which, with or without any core yarn, together form the subsequent yarn.
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: April 3, 2001
    Assignees: Fritz Stahlecker, Hans Stahlecker
    Inventor: Hans Stahlecker
  • Patent number: 6185790
    Abstract: A condensing zone for condensing a drafted twist-free fiber strand is arranged downstream of a drafting arrangement of a ring spinning machine. The condensing zone includes a stationary sliding surface having a suction slit extending essentially in a fiber strand transport direction. A perforated transport belt transports the fiber strand over the suction slit of the sliding surface. The transport belt wraps around a bottom roller of a front roller pair of the drafting arrangement and is driven by the bottom roller. The transport belt drives in turn a nipping roller, which limits the condensing zone on its exit side with a nipping point serving as a twist block. The nipping roller presses the fiber strand and the transport belt against the sliding surface of the condensing zone.
    Type: Grant
    Filed: July 29, 1999
    Date of Patent: February 13, 2001
    Assignees: Fritz Stahlecker
    Inventor: Hans Stahlecker
  • Patent number: 6161258
    Abstract: An arrangement for condensing a drafted fiber strand is arranged at each spinning station of a spinning machine. The condensing arrangements each comprise a transport surface which transports the fiber strand over a suction slit of a suction device. A joint suction device having its own fan is provided for a certain number of spinning stations so that differences in underpressure between the individual spinning stations are avoided to a great extent.
    Type: Grant
    Filed: August 6, 1999
    Date of Patent: December 19, 2000
    Assignees: Fritz Stahlecker, Hans Stahlecker
    Inventor: Hans Stahlecker
  • Patent number: 6092356
    Abstract: A process for open-end spinning provides for at least one sliver being opened into single fibers. A wide fiber veil is formed from parallel single fibers extending in the direction of motion, which fiber veil is fed to a transporting surface by means of a moving collecting surface. The single fibers are transferred from the collecting surface to the transporting surface at a transfer point, whereby the direction of motion of the fiber veil is abruptly changed, however the current relative position of the single fibers remaining essentially constant. This motion direction change occurs at the transfer point, with the respective front part of the fiber veil being transferred to the transporting surface as a fiber group in a predetermined sequence, and the transporting surface moves transversely to the direction of motion of the collecting surface.
    Type: Grant
    Filed: October 16, 1998
    Date of Patent: July 25, 2000
    Assignees: Fritz Stahlecker, Hans Stahlecker
    Inventor: Fritz Stahlecker
  • 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: 6055801
    Abstract: An open-end spinning machine comprises a plurality of adjacently arranged spinning aggregates. Each spinning aggregate consists essentially of a rotor unit comprising a spinning rotor, and an opening unit for opening a fed sliver into single fibers. The opening unit and the rotor unit each comprise a plurality of components. In order to modernize the open-end spinning machine, at least one of the above mentioned components is replaced by at least one modernized component in such a way that the efficiency of the spinning aggregate is improved.
    Type: Grant
    Filed: November 5, 1996
    Date of Patent: May 2, 2000
    Assignees: Fritz Stahlecker, Hans Stahlecker
    Inventor: Fritz Stahlecker
  • Patent number: 6052872
    Abstract: A draft free condensing zone for condensing a drafted fiber strand is provided between a front roller pair of a drafting unit of a ring spinning machine and a delivery roller pair arranged downstream thereof. The apparatus for condensing comprises an air-permeable und suctioned sliding surface which is in contact with the fiber strand, under which sliding surface is located a suction slit which is stationarily arranged and extends essentially in transport direction of the fiber strand. The sliding surface is the front surface of a rotating disc, whose rotational axle extends essentially perpendicular to the transport direction of the fiber strand.
    Type: Grant
    Filed: July 27, 1999
    Date of Patent: April 25, 2000
    Assignees: Fritz Stahlecker, Hans Stahlecker
    Inventors: Kurt Lang, Fritz Stahlecker
  • Patent number: 6032453
    Abstract: The fiber sliding surface and the fiber collecting groove of an open-end spinning rotor are provided with hard particles embedded therein. After a certain length of operation time of the spinning rotor, the particles in the fiber collecting groove have a larger particle size than the particles in the fiber sliding surface. Thus it is ensured that the fiber collecting groove has a better "grip effect" relative to the fibers to be spun than the smoother fiber sliding surface.
    Type: Grant
    Filed: September 22, 1998
    Date of Patent: March 7, 2000
    Assignees: Fritz Stahlecker, Hans Stahlecker
    Inventor: Fritz Stahlecker
  • Patent number: 6029436
    Abstract: In the case of a rotor cup for an open-end spinning aggregate comprising a rough-surfaced fiber collecting groove and a smooth fiber sliding surface it is provided that hard particles are rolled into the fiber collecting groove. The fiber collecting groove is preferably provided with a soft nickel plating before the particles are rolled in, after which the nickel plating is then hardened.
    Type: Grant
    Filed: August 14, 1998
    Date of Patent: February 29, 2000
    Assignees: Fritz Stahlecker, Hans Stahlecker
    Inventor: Gerd Stahlecker
  • Patent number: 5974778
    Abstract: In the case of an arrangement for open-end spinning, a driven suction roller is provided which in a take-up zone takes up fiber material opened to single fibers and transports it to a suctioned yarn formation line. The yarn formation line is defined by a suction insert arranged in the inside of the suction roller, and extends transversely to the transport direction of the suction roller on the surface thereof. In extension of the yarn formation line a twist device is provided. On the side facing away from the twist device, the suction roller is supported on the suction insert while freely overhanging same, so that the twist device reaches directly up to the suctioned yarn formation line. The yarn formation line is preferably inclined at an angle towards the take-up zone on the side facing away from the twist device.
    Type: Grant
    Filed: September 13, 1997
    Date of Patent: November 2, 1999
    Assignees: Hans Stahlecker, Fritz Stahlecker
    Inventor: Fritz Stahlecker