Patents Assigned to Barmag AG
  • Textile machine with product transport apparatus
    Patent number: 5520345
    Abstract: The present invention relates to a textile machine for producing/processing yarns, in which the empty tubes and full yarn packages are transported by a product transport system which includes a guideway for the product conveying devices, and a separate overhead rail which supports a tractor drive unit. The tractor drive unit may be coupled to either end of the product conveying devices by an elongate chain, which permits the product conveying devices to be moved onto and from said tracks which extend along an aisle along the front of the textile machine.
    Type: Grant
    Filed: July 25, 1994
    Date of Patent: May 28, 1996
    Assignee: Barmag AG
    Inventors: Udo Teich, Detlef Hammerschmidt
  • Melt spinning apparatus
    Patent number: 5513973
    Abstract: A melt spinning apparatus is disclosed which includes a supporting housing, a melt supply block mounted in the upper end of the housing, and a spin plate mounted adjacent the lower end of the housing so as to define a spinning chamber between the block and plate. A melt diverting plate is positioned in the spinning chamber for deflecting the melt entering into the chamber, and the melt diverting plate is configured such that substantially the same pressure drop occurs in the melt as it moves from the melt supply duct to all portions of the upper surface of the spin plate, so as to achieve a substantially uniform denier among the resulting filaments.
    Type: Grant
    Filed: January 18, 1994
    Date of Patent: May 7, 1996
    Assignee: Barmag AG
    Inventors: Gerd Keil, Erich Lenk, Eberhard Fenger
  • Apparatus and method for weighing textile packages
    Patent number: 5504278
    Abstract: An apparatus for weighing full yarn packages which are supported on a transport unit which moves along a trackway in the textile plant. The weighing apparatus includes a weighing station which is positioned at a fixed location along the path of travel of the transport unit, and the weighing station temporarily supports the weight of each package on the transport unit and so as to permit the weight of each package to be sensed.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: April 2, 1996
    Assignee: Barmag AG
    Inventors: August L. Deters, Udo Teich, Frank Adenheuer, Martin Broich
  • Rotatably supported roll
    Patent number: 5484370
    Abstract: A rotatably supported roll (1), which is adapted to form a nip with a second roll, so as to advance therebetween a web of material. The load in the nip between the rolls can be controlled by an adjustable camber. To this end, an interior hollow space (13) is provided in the roll (1), which is filled with an incompressible pressure medium, and put under a controlled pressure, so as to cause the roll jacket (10/12) to bulge radially outwardly. This bulging can be significantly supported and influenced by a predetermined progression of the wall thickness of the jacket (10/12) in the axial direction of the roll.
    Type: Grant
    Filed: June 1, 1994
    Date of Patent: January 16, 1996
    Assignee: Barmag AG
    Inventors: Dietmar Jenke, Josef Majsai, Winfried Wubken
  • Yarn texturing apparatus
    Patent number: 5469609
    Abstract: A yarn texturing apparatus which comprises a nozzle having a passageway through which the yarn is advanced, and a duct system for introducing heated air into the passageway. A perforated stuffer box is disposed adjacent the outlet end of the passageway. The duct system for the heated air includes an annular duct surrounding the passageway, and a supply duct communicating with the annular duct. Also, an adjustable deflector is mounted in the supply duct immediately adjacent the annular duct for imparting a circumferential component to the heated air as it enters the annular duct, and which in turn imparts a slight twist to the advancing yarn so as to facilitate its smooth advance.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: November 28, 1995
    Assignee: Barmag AG
    Inventor: Horst Beifuss
  • Method and apparatus for producing a wound package of an endless thermoplastic material
    Patent number: 5469149
    Abstract: A method and apparatus for continuously producing an endless thermoplastic material, such as yarn or tape, and winding the material into a package. A physical parameter of the package, such as its diameter or weight, is monitored, and a control signal is generated which is a function of the monitored physical parameter. The control signal is then compared to a predetermined reference signal, and an output signal is generated when the difference between the control signal and the reference signal exceeds a predetermined deviation. The output signal thus represents the quality of the material in the package, and it may be used to permit classification of the final product or to control the operating conditions of the apparatus so as to maintain a desired quality level.
    Type: Grant
    Filed: July 19, 1993
    Date of Patent: November 21, 1995
    Assignee: Barmag AG
    Inventors: Tobias Binner, Klaus Schafer
  • Friction false twist unit
    Patent number: 5463861
    Abstract: The invention relates to a friction false twist unit for crimping synthetic filament yarns, the friction element shafts of which are movable with a radial play, and which are influenced in their movement by friction dampers.
    Type: Grant
    Filed: August 9, 1993
    Date of Patent: November 7, 1995
    Assignee: Barmag AG
    Inventor: Hellmut Lorenz
  • Method and apparatus of monitoring the quality of a false twist textured yarn
    Patent number: 5440870
    Abstract: A method and apparatus for monitoring the quality of the yarn processed on a false twist texturing machine is disclosed, and which includes sensing the tension of the advancing yarn at a location immediately downstream of the false twist unit, and determining the coefficient of variation of the sensed tension. An error signal is generated whenever the coefficient of variation exceeds a predetermined upper limit and whenever the coefficient of variation drops below a predetermined lower limit. Also, an alarm signal is generated whenever the error signal exceeds the predetermined upper limit for a predetermined time, and whenever the error signal drops below the predetermined lower limit for a predetermined time, and the alarm signals are counted so as to provide an indication of the quality of the yarn.
    Type: Grant
    Filed: January 9, 1992
    Date of Patent: August 15, 1995
    Assignee: Barmag AG
    Inventor: Bernd Neumann
  • Apparatus for making a synthetic filament yarn
    Patent number: 5433591
    Abstract: An apparatus for producing a synthetic filament yarn including a spinneret and cooling shaft. A plurality of air deflecting members in the form of coaxial tubes or flat plates are mounted within the cooling shaft so that the upper edge of each tube or plate lies closely adjacent the periphery of the bundle of extruded filaments, and the lower edge of each tube or plate is at a distance from the filaments greater than that of the upper edge. The deflecting members thus serve to shield the filaments from air turbulence and also to remove from the filaments a significant portion of the heated air which is entrained with the advancing filaments.
    Type: Grant
    Filed: May 19, 1993
    Date of Patent: July 18, 1995
    Assignee: Barmag AG
    Inventors: Martin Zingsem, Detlev Schulz
  • False twist crimping machine
    Patent number: 5431002
    Abstract: A false twist crimping machine has a secondary heater positioned downstream of the false twist zone, which comprises a slightly curved, upright, externally heated tube. The upright heating tube has a downstream end which connects with a horizontally directed transport tube which extends laterally across the service aisle of the machine adjacent the floor, and to a side frame which mounts the package take-up system. The inside diameter and length of the transport tube closely correspond to the inside diameter and length of the heating tube.
    Type: Grant
    Filed: October 8, 1993
    Date of Patent: July 11, 1995
    Assignee: Barmag AG
    Inventor: Heinz Treptow
  • Suction apparatus for withdrawing advancing yarns to a waste container
    Patent number: 5423170
    Abstract: A yarn winding machine having a suction apparatus for withdrawing the severed advancing yarns during the bobbin changing operation. The suction apparatus comprises a tubular duct which extends the length of the winding machine, and the duct mounts a yarn intake tube of relatively small diameter in front of each of the side by side winding stations of the machine. A yarn is adapted to be sucked into and through each of the yarn intake tubes by the relatively high speed air current flowing therethrough, and the yarn then advances into the tubular duct and to a waste container.
    Type: Grant
    Filed: April 12, 1993
    Date of Patent: June 13, 1995
    Assignee: Barmag Ag
    Inventors: Peter Dammann, Klaus Bartkowiak
  • Godet for guiding and heating an advancing yarn
    Patent number: 5421070
    Abstract: A godet for guiding and heating an advancing yarn, which includes a shaft mounted for rotation about its axis, and a casing coaxially and releasably mounted to the shaft. An induction coil heating system is fixedly mounted between the shaft and the outer wall of the casing, and the heating system includes a tubular core having a plurality of induction coils mounted thereon. A plurality of annular ribs are positioned on the core and on the inside of the outer wall of the casing for providing an advantageous magnetic flux path between a core and casing.
    Type: Grant
    Filed: December 3, 1993
    Date of Patent: June 6, 1995
    Assignee: Barmag AG
    Inventor: Erich Lenk
  • Apparatus and method for blending yarn strands
    Patent number: 5400486
    Abstract: An apparatus for forming a blended yarn from a plurality of yarn strands is disclosed, and wherein the yarns are advanced to contact the surface of a feed roll in a side by side arrangement. A guide roll for each of the yarn strands is positioned upstream of the feed roll, and one or more of the guide rolls has a circumferential configuration which serves to repeatedly move the advancing yarn strands relative to each other so that the strands laterally cross each other on the surface of the feed roll in a predetermined pattern.
    Type: Grant
    Filed: July 5, 1994
    Date of Patent: March 28, 1995
    Assignee: Barmag AG
    Inventors: Donald J. Dobbins, Klaus Gerhards
  • Product conveying apparatus
    Patent number: 5398801
    Abstract: A conveying apparatus for supporting an article such as a product carrier during its conveyance is disclosed. The conveying apparatus includes a transferring track segment and a receiving track segment which are positioned laterally side by side, and with the transferring track segment being progressively inclined from a horizontal orientation to a laterally tilted orientation, and with the receiving track segment being progressively inclined from a laterally tilted orientation to a horizontal orientation. As result, the article being conveyed is rotated about a longitudinal axis and transferred to the receiving track segment. The apparatus finds particular utility in a yarn spinning plant, wherein yarn packages may be conveyed in a horizontal orientation and then rotated to a vertical orientation to facilitate packaging.
    Type: Grant
    Filed: September 14, 1992
    Date of Patent: March 21, 1995
    Assignee: Barmag AG
    Inventors: Manfred Langen, Hans-Peter Schmitz, Udo Teich
  • Hydraulic system
    Patent number: 5394696
    Abstract: In a hydraulic system, several consumers (4) are supplied by a common pump. In so doing, the consumers (4) are controlled by control valves (6). When the required oil flows exceed the quantity which can maximally be delivered, a control becomes operative which allows to adapt the reference value signals by which the valves (6) are controlled, to the actually measured pump flow, preferably to the weighting of the actually measured pump flow with the maximally predetermined pump flow.
    Type: Grant
    Filed: October 15, 1992
    Date of Patent: March 7, 1995
    Assignee: Barmag AG
    Inventors: Otwin Eich, Franz-Peter Salz
  • Method and apparatus for controlling the yarn tension in a false twist texturing machine
    Patent number: 5369945
    Abstract: A method and apparatus for controlling a false twist texturing machine, which extends the previously known process for controlling operation during the normal operation of the machine, to exceptional operating conditions, such as during yarn thread-up and/or restarting after a temporary stoppage of operation by reason of a power failure. In accordance with the invention, the known method which includes control of the frictional force imparted to the yarn as a function of the yarn tension, is modified in such a manner that during periods other than normal operation, the control of the frictional force as a function of the yarn tension is terminated, and a predetermined frictional force is imparted to the yarn.
    Type: Grant
    Filed: February 9, 1993
    Date of Patent: December 6, 1994
    Assignee: Barmag AG
    Inventors: Bernd Wessolowski, Bernd Neumann, Hellmut Lorenz
  • Godet for heating an advancing yarn
    Patent number: 5362945
    Abstract: A godet for heating an advancing yarn including a rotatably mounted godet casing of magnetically conductive material, a stationary primary winding, and a power supply for powering the primary winding at least about 300 Hz. The godet casing is formed of iron and acts as both the secondary winding and core for the primary winding. Accordingly, the godet casing does not need a separate and defined secondary winding, nor does the godet casing include a copper insert or copper coating on the interior of the casing.
    Type: Grant
    Filed: April 24, 1992
    Date of Patent: November 8, 1994
    Assignee: Barmag AG
    Inventor: Uwe Baader
  • Melt spinning apparatus and method
    Patent number: 5354529
    Abstract: A melt spinning apparatus adapted for spinning a plurality of preferably monofilaments each having a denier which is maintained within close tolerances. The apparatus comprises a nozzle head having a plurality of vertical bores which are annularly arranged about a central axis and a nozzle assembly in each of the bores. A separate melt delivery system delivers pressurized melt to each nozzle assembly, and in a preferred embodiment, each separate melt delivery system comprises one of the discharge outlets of a planetary gear pump.
    Type: Grant
    Filed: November 23, 1990
    Date of Patent: October 11, 1994
    Assignee: Barmag AG
    Inventors: Hans-Peter Berger, Ralph Sievering
  • Apparatus for melt spinning multicomponent yarns
    Patent number: 5352106
    Abstract: A spinning apparatus for melt spinning thermoplastic multicomponent yarn is disclosed, in which a nozzle pack (22) is joined by bolts with a filter cup (13), with the entire unit being mounted by a thread (21) on a connecting plug (20) of the pump or distributor block (10). The nozzle pack (22) is adapted to produce bicomponent yarns, and the exchange of a single blending plate (37) allows the apparatus to produce different structures of bicomponent filaments. Such spinning apparatus enhance the flexibility of the synthetic fiber producer and reduce the cost for spare parts, since it is necessary to keep available only additional blending plates (37), but not entire nozzle packs (22).
    Type: Grant
    Filed: August 6, 1992
    Date of Patent: October 4, 1994
    Assignee: Barmag AG
    Inventors: Erich Lenk, Ralph Sievering, Gerd Zimmerbeutel, Gerhard Nickisch
  • Apparatus for loading winding tubes
    Patent number: 5350128
    Abstract: An apparatus is disclosed for transporting empty yarn winding tubes from a tube supply magazine, and then loading the tubes onto the transport: mandrel, of a service carriage. A rake removes the empty tubes in layers from a cardboard carton and delivers the tubes in a predetermined orientation to a channeled tube receiving tray, and the tubes are then individually dispensed from the tray and moved coaxially onto the transport mandrel of a service carriage.
    Type: Grant
    Filed: September 14, 1992
    Date of Patent: September 27, 1994
    Assignee: Barmag, AG
    Inventors: Ludger A. Deters, Frank Adenheuer