Patents Assigned to Lindauer Dornier Gesellschaft mbH
  • Publication number: 20030066602
    Abstract: A multilayer plastic film having a heat-sealable surface layer is initially provided at a process temperature above a heat-sealing temperature of the surface layer. To prevent the surface layer from adhering onto a deflection roller, this layer must be cooled below the heat-sealing temperature. A cooling arrangement is positioned directly upstream from the deflection roller and blows cold air onto the heat-sealable surface layer. Thereby, the surface layer is rapidly cooled below the heat-sealing temperature, while most of the multilayer film is not substantially cooled and remains close to the process temperature. A counter-heater may heat the opposite surface of the plastic film as the cooling arrangement cools the heat-sealable surface layer.
    Type: Application
    Filed: October 7, 2002
    Publication date: April 10, 2003
    Applicant: Lindauer DORNIER Gesellschaft mbH
    Inventors: Andreas Rutz, Adolf Mueller
  • Publication number: 20030066569
    Abstract: In a loom with a mechanical weft insertion the motion of each individual warp thread on its way from an uppermost position to a lowermost position and vice verse is controlled individually by a jacquard in such a way, that the motion profile includes a shed stopping in a weft entrance section and simultaneously in a weft exit section of a weaving width of the loom. Shed stopping is avoided at least in the center of the warp shed, namely in an intermediate section between the weft entrance and exit sections of the weaving width of a loom thereby providing sufficient time for the rapiers or grippers to be withdrawn from the shed without damaging the warp threads.
    Type: Application
    Filed: October 9, 2002
    Publication date: April 10, 2003
    Applicant: Lindauer DORNIER Gesellschaft mbH
    Inventor: Adnan Wahhoud
  • Publication number: 20020170615
    Abstract: An arrangement for supplying air with a controlled pressure to the main weft insertion nozzles of an air jet loom includes a single servovalve connected between a pressurized air source, an air vent, and a pressure manifold, and individual shut-off valves respectively interposed in branch lines connected from the pressure manifold to the individual nozzles. A pressure sensor measures the actual pressure provided to the manifold. An electronic controller receives a pressure control signal and controls the servovalve responsive to any difference between the pressure control signal and the actual measured pressure signal. The arrangement is simple, economical, and rapidly reacting, to avoid the need of individual throttle valves or pressure regulators for the individual nozzles.
    Type: Application
    Filed: May 16, 2002
    Publication date: November 21, 2002
    Applicant: Lindauer DORNIER Gesellschaft mbH
    Inventors: Markus Gielen, Adnan Wahhoud, Dieter Teufel, Peter Schiller, Matthias Armbrust
  • Patent number: 6460577
    Abstract: The heald shafts of a power loom are driven by electric D.C. or A.C. motors which have an external rotor or an armature connected to the respective heald shaft through two articulated couplings, for example snap locks, and a push-pull rod. The motors receive control signals from a computerized controller for reversing the motion direction of the external rotor or armature. The stators of the motors are rigidly mounted on a fixed axis secured to the loom frame.
    Type: Grant
    Filed: March 7, 2002
    Date of Patent: October 8, 2002
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventor: Valentin Krumm
  • Patent number: 6450210
    Abstract: A yarn cutting device for mechanical looms, having two mutually movable blades which are arranged on a mounting surface, at least one of the blades being operable by a drive. The drive is constructed as an electrically energized linear motor, whereby a compact flat construction is achieved which has few movable parts. One of the blade carriers is a rotor of the linear motor.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: September 17, 2002
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventors: Peter Schiller, Dieter Teufel
  • Publication number: 20020124901
    Abstract: The heald shafts of a power loom are driven by electric D.C. or A.C. motors which have a external rotor or an armature connected to the respective heald shaft through two articulated couplings, for example snap locks, and a push-pull rod. The motors receive control signals from a computerized controller for reversing the motion direction of the external rotor or armature. The stators of the motors are rigidly mounted on a fixed axis secured to the loom frame.
    Type: Application
    Filed: March 7, 2002
    Publication date: September 12, 2002
    Applicant: Lindauer DORNIER Gesellschaft mbH
    Inventor: Valentin Krumm
  • Patent number: 6439271
    Abstract: A valve arrangement of a loom includes valve modules held between flange plates and sharing a common inlet feeding into a common inner valve space. A valve outlet of each valve module leads to an insertion nozzle or nozzle group, and is controlled by a valve disk actuated by a piezoelectric actuator to rapidly dynamically adjust the pressure profile. A quality parameter, characteristic of the thread insertion flight time of each weft thread, is stored in a data bank and has a nominal pressure profile for achieving a nominal thread flight time allocated thereto. The actual thread flight time of each weft thread is measured and compared with the stored nominal thread flight time. A control signal responsive to the time difference is provided to the valve arrangement to control the piezoelectric actuator so as to adjust the pressure and/or the quantity of the pressure medium provided through the valve module to the connected insertion nozzle.
    Type: Grant
    Filed: June 6, 2001
    Date of Patent: August 27, 2002
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventors: Peter Schiller, Dieter Teufel, Markus Gielen
  • Publication number: 20020112759
    Abstract: An apparatus for dosing lubricant into a compressed air flow includes a lubricant container, a pneumatically operated lubricant pump, an injection channel, a non-return valve interposed between the outlet of the pump and the injection channel, and an electronic sensor cooperating with or coupled to the non-return valve so that the sensor emits an electrical signal responsive and corresponding to the stroke travel of the non-return valve. When the pump carries out a lubricant injection cycle, the pressurized lubricant pushes open the non-return valve, flows into the injection channel and from there into a main channel through which compressed air flows. The travel of the valve is sensed by the sensor, and the sensor signal indicates whether the lubricant injection was proper or faulty, e.g. if the proper amount of lubricant was injected.
    Type: Application
    Filed: February 15, 2002
    Publication date: August 22, 2002
    Applicant: Lindauer DORNIER Gesellschaft mbH
    Inventor: Siegfried Jaeger
  • Patent number: 6431858
    Abstract: In an apparatus for heat treating a material web that enters and exits the apparatus through respective gaps, an air cushion generating unit includes a slot nozzle through which a ventilator blows a laminar flow of air, which then flows laminarly along a convexly curved surface of the unit, to form a laminar air cushion which flows directly along the material web through one of the gaps, then expands outside of this gap, and is sucked back into the air cushion generating unit and recirculated through the slot nozzle. The laminar air cushion steadily holds and supports the material web so that the mechanical gap size can be reduced while reducing losses of hot process air and still avoiding physical contact with the material web.
    Type: Grant
    Filed: February 14, 2001
    Date of Patent: August 13, 2002
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventor: Andreas Rutz
  • Publication number: 20020100151
    Abstract: A method and apparatus continuously monitor the functional condition of the successive bearings of the tenter clips or claws of a tenter chain as the bearings roll along a contact surface of the endless guide rail of a tentering machine. A sensing arrangement is integrated into the guide rail in the area of the contact surface thereof. The sensing arrangement senses a physical value indicative of the presence and condition of the respective bearing passing by the sensing arrangement. The sensing arrangement may include a pressurized air outlet and an adjacent pressure measuring channel connected to a pressure sensor to sense the back pressure created by a passing bearing. The sensing arrangement may alternatively include an electromagnetic eddy current sensor, or an optoelectronic light beam sensor.
    Type: Application
    Filed: January 23, 2002
    Publication date: August 1, 2002
    Applicant: Lindauer DORNIER Gesellschaft mbH
    Inventors: Kai Urbanzyk, Andreas Rutz
  • Patent number: 6418976
    Abstract: At least one of two flexible leaf springs that form a thread gap is controlled by a linearly moveable element of a linear motor or drive. Multi-thread brakes are formed by assembling a plurality of such brakes on a common support whereby a single stator may cooperate with a plurality of linearly moveable armatures forming a corresponding plurality of thread brakes or each thread brake may have its own stator and its own armature arranged in a row either linearly or along a curved support, whereby a compact structure is achieved.
    Type: Grant
    Filed: March 16, 2001
    Date of Patent: July 16, 2002
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventors: Heinz-Peter Loehr, Rainer Schuster
  • Patent number: 6418972
    Abstract: A reed in a loom is driven or oscillated back and forth to perform the beat-up motion by a direct reed drive that avoids using the main loom drive for operating the reed. The direct drive is an electromagnetic motor which uses as one of its components a reed support shaft (4) either as a rotor or as a stator. The reed support shaft acting as a rotor carries a reed slay which mounts the reed to the rotor. When the reed support shaft acts as a stator, the reed slay is mounted to separate rotor elements. In both instances the reed support shaft is part of a rotary or linear electromagnetic direct drive motor construction.
    Type: Grant
    Filed: May 2, 2001
    Date of Patent: July 16, 2002
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventors: Valentin Krumm, Heinz-Peter Loehr, Hans-Joachim Holz
  • Patent number: 6367511
    Abstract: A ground warp thread sheet and a pile warp thread sheet are supplied to a shed forming device. Two stop motions on separate planes respectively monitor the pile warp and the ground warp. The ground warp and the pile warp are deflected over a deflecting rod upstream from the shed forming device. The deflecting rod supports the ground warp and directs the pile warp to cross and interpenetrate through the ground warp before being deflected into the back shed. The vertices of the ground warp and pile warp back sheds are thus located on opposite sides of the deflecting rod. The pile warp crosses through the ground warp directly upstream from the deflecting rod, at a steep angle, for example from 45 to 135 °.
    Type: Grant
    Filed: May 14, 2001
    Date of Patent: April 9, 2002
    Assignee: Lindauer DORNIER Gesellschaft mbH
    Inventors: Adnan Wahhoud, Peter Czura, Herbert Mueller
  • Patent number: 6364235
    Abstract: A weft thread pre-winder or pre-spooling device for an air jet loom includes a thread storage drum (6) made up of several drum segments (7) that are each adjustable in the radial direction so as to adjust the diameter and circumference of the thread storage drum. Thereby the amount of stored thread can be adjusted. Open gaps or interspaces (8) are formed between respective adjacent drum segments (7), and become larger or smaller depending on the radial adjustment of the segments. Especially for threads that form only a small thread balloon while being drawn-off from the thread storage drum, the threads would tend to get into these interspaces and become caught on the edges or corners of the drum segments, which would lead to energy losses in the thread and interfere with the proper weft insertion and thread transport.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: April 2, 2002
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventor: Adnan Wahhoud
  • Patent number: 6318414
    Abstract: A solenoid valve, particularly for use in air nozzle weaving machines, has a valve housing with at least one valve inlet and at least one valve outlet. An electromagnetically actuated valve body is arranged in a passage area between the valve inlet and the valve outlet. In order to permit a fast and operationally reliable exchange of the parts of the solenoid valve subjected to wear, it is provided that a fastening flange, the valve body, as well as the electromagnetic drive together form a first valve subassembly which is subjected to a rapid exchange. The valve housing with its connections forms a second valve subassembly which is fixedly arranged on the machine.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: November 20, 2001
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventors: Peter Schiller, Dieter Teufel
  • Patent number: 6315008
    Abstract: A warp thread control system for forming the loom shed as a first control section (1) and a second warp control section (16). The first section is equipped with at least one guide element (2) for guiding the leno threads (3) and a guide rod (4) carrying a multitude of passages 6 arranged and parallel to one another for guiding the ground threads (5). The second warp control section (16) includes a thread detour element (17) for detouring the leno threads (3) and a needle bar (18) carrying a multitude of needles (19) with needle eyes (19.1) for guiding the leno threads (3). Both the first warp control section (1) and the second warp control section (16) are positioned on the side of the reed facing the warp threads whereby the positioning may differ either above or below a weaving plane (28) or partially above and partially below the weaving plane (28). Preferably but not necessarily both warp control sections are driven by a common drive (11).
    Type: Grant
    Filed: January 29, 2001
    Date of Patent: November 13, 2001
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventors: Peter D. Dornier, Adnan Wahhoud, Valentin Krumm, Horst Haeussler, Juergen Vossen, Josef Hehle
  • Patent number: 6311737
    Abstract: A leno ground fabric is produced over the entire weaving width of a loom by using two heald frames each having a length corresponding to the weaving width. The heald frames are equipped with a multitude of lifting healds or heddles and with a multitude of half healds or heddles that move the leno warp thread and the ground warp threads for the shed formation over the entire loom width.
    Type: Grant
    Filed: February 1, 2001
    Date of Patent: November 6, 2001
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventors: Adnan Wahhoud, Peter Czura, Josef Hehle
  • Patent number: 6307340
    Abstract: A main drive shaft of a power loom reaches the rated operating rpm of the loom by the time of the first beat-up of the reed, thus avoiding start-up faults in the fabric. A flywheel mass is accelerated to a start-up rpm that is higher than the rated operating rpm before it is coupled with the main drive shaft. The start-up rpm is determined automatically and iteratively, with ever-increasing accuracy in successive starts of the loom. When the main drive shaft is coupled to the flywheel mass, the flywheel mass rpm decreases simultaneously as the main drive shaft rpm increases from standstill to the operating rpm. The actual main drive shaft rpm is measured at least at the time of the first beat-up and any deviation from the rated operating rpm is evaluated by the loom control.
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: October 23, 2001
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventors: Arno Wagner, Herbert Mueller
  • Patent number: 6286561
    Abstract: The removal or transport of cut-off catch selvages in a loom is monitored by one or more sensors which produce a sensor output signal that represents the actual movement of the cut-off catch selvage. The sensor output signal is processed in an evaluation processor for producing a fault signal if and when the sensor output signal deviates from a predetermined standard or reference signal. The fault signal is used to trigger an alarm and/or stop the loom.
    Type: Grant
    Filed: November 13, 2000
    Date of Patent: September 11, 2001
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventors: Matthias Armbrust, Michael Birk
  • Patent number: 6257284
    Abstract: A woof yarn tension device for weaving machines, has a controllable tension device which acts upon the woof yarn and which, at least on the output side, has a yarn guide eye. In order to reduce the stressing of the woof yarn, the number of the deflection points for the woof yarn existing on the feeding side are reduced in that the yarn guide eye of the woof yarn tension device is simultaneously constructed as a woof yarn monitor.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: July 10, 2001
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventor: Rainer Schuster