Patents Assigned to Lindauer Dornier
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Patent number: 6748981Abstract: 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: GrantFiled: May 16, 2002Date of Patent: June 15, 2004Assignee: Lindauer Dornier Gesellschaft mbHInventors: Markus Gielen, Adnan Wahhoud, Dieter Teufel, Peter Schiller, Matthias Armbrust
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Patent number: 6663678Abstract: Tubular knit goods including natural fibers and synthetic elastomeric fibers are steam treated and then circularly expanded and heat-fixed while being transported vertically downwardly over a circular spreader in a heat fixing chamber. The goods build up a buffer or excess material reserve on the conical feed section of the circular spreader, either by using a greater transport velocity into the feed section than that out of the feed section and along the spreader, or by starting to feed the goods into the feed section for a time before starting to draw the goods out of the feed section and then transporting the goods to and from the feed section at the same velocity. The goods relax in the buffer. Transporting the goods vertically downwardly over the circular spreader during the heat-fixing uses gravity advantageously, and reduces tension in the goods.Type: GrantFiled: December 24, 2001Date of Patent: December 16, 2003Assignee: Lindauer Dornier Gesellschaft mbHInventors: Werner Strudel, Guenter Euscher, Oliver Hostenkamp
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Publication number: 20030196718Abstract: A thread brake arrangement for use in a textile processing machine includes two brake elements with the thread running therebetween. An actuator, preferably a piezoelectric actuator, variably actuates one of the brake elements relative to the other to exert an adjustable braking force onto the thread. The thread exerts a reaction force in the thread running direction onto the brake elements. At least one of the brake elements is movably supported to be movable along the thread running direction, and is mechanically coupled to a force transducer that measures the reaction force, which is proportional or equal to the thread tension force. A regulating arrangement receives the measured force signal, and controls the actuator to adjust the adjustable brake element, so as to vary the applied braking force and thus regulate the arising thread tension responsive to and dependent on the measured reaction force.Type: ApplicationFiled: April 23, 2003Publication date: October 23, 2003Applicant: Lindauer DORNIER Gesellschaft mbHInventors: Wilhelm Herrlein, Manuel Renz
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Publication number: 20030183295Abstract: In a gripper weaving loom which weaves several different types of weft threads into a fabric, it is desirable to keep weft material waste to a minimum. For this purpose a weft thread (7) already inserted into the loom shed is simultaneously held by a weft presenting clamp (13) and by a holding clamp (18). As soon as the weft is held by both clamps the weft is cut by a cutter (20) effective between the two clamps to form a trailing weft end (7B) of the already inserted weft and a leading weft end (7A) of a weft yet to be inserted. The holding clamp (18) keeps holding the trailing end (7B) until beat-up of the weft by the reed (4) is completed. For this purpose, the holding clamp (18) moves with the reed (4) into the beat-up position. When beat-up is completed the holding clamp (18) releases the trailing weft end (7B) and returns into a weft receiving position (22B). The weft presenting clamp (13) still holds the leading end (12A).Type: ApplicationFiled: March 27, 2003Publication date: October 2, 2003Applicant: Lindauer DORNIER Gesellschaft mbHInventors: Wilhelm Herrlein, Manuel Renz
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Publication number: 20030172984Abstract: A fabric spreader arrangement for a loom includes a spreader rod rotatably received in a hollow space of a spreader body. The fabric is looped around the spreader rod in the hollow space. To achieve a low wear, a light weight, and an excellent fabric spreading effect, the spreader rod is a one-piece hollow cylindrical metal body extending entirely over the weaving width, preferably made of V4A stainless steel, having an outer diameter of at least 10 mm (and preferably 15 mm) with a wall thickness of at least 0.4 mm (and preferably 0.7 mm), and having an outer circumferential surface that has been surface treated to achieve a surface roughness with a peak-to-valley roughness measurement of at least 10 &mgr;m (and preferably 20 to 50 &mgr;m).Type: ApplicationFiled: March 12, 2003Publication date: September 18, 2003Applicant: Lindauer DORNIER Gesellschaft mbHInventor: Valentin Krumm
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Patent number: 6615462Abstract: A circular spreader for spreading tubular textile goods includes a spreader arrangement with an inlet mandrel and an outlet mandrel at opposite ends thereof inside the tubular goods, an inlet support structure arranged around the inlet mandrel outside of the tubular goods with an inlet guide gap therebetween, and an outlet support structure arranged around the outlet mandrel outside of the tubular goods with an outlet guide gap therebetween. The mandrels and the support structures are magnetic, to magnetically repel each other across the guide gaps. The components may be permanent magnets or electromagnets, or have separate discrete magnets provided thereon. The spreader arrangement is supported by magnetic levitation relative to the support structures, without direct contact therebetween. The tubular goods pass through the guide gaps with low friction, no pressing force exerted thereon, and no impairment of the structure or quality thereof.Type: GrantFiled: October 29, 2002Date of Patent: September 9, 2003Assignee: Lindauer Dornier Gesellschaft mbHInventor: Werner Strudel
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Patent number: 6609831Abstract: 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: GrantFiled: January 23, 2002Date of Patent: August 26, 2003Assignee: Lindauer Dornier Gesellschaft mbHInventors: Kai Urbanzyk, Andreas Rutz
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Publication number: 20030084951Abstract: A direct drive for a loom reed includes a linear motor carrying out a linear oscillating motion, or an arc segment motor carrying out a pivoting oscillating motion, or a circular coaxial motor carrying out a pivoting oscillating motion. The circular coaxial motor has a hollow shaft rotor arranged within a hollow shaft stator, and may further have an additional hollow shaft stator arranged within the rotor in a sandwich motor construction. The arc segment motor and the linear motor may similarly have a rotor member sandwiched between two stator members. Two motor units can be provided respectively above and below the weaving plane to drive the reed together. With these measures, the driving force is increased, yet the drive arrangement is confined to the available installation space.Type: ApplicationFiled: November 7, 2002Publication date: May 8, 2003Applicant: Lindauer DORNIER GmbHInventors: Dietmar Von Zwehl, Michael Lehmann, Dieter Mayer
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Publication number: 20030079322Abstract: A circular spreader for spreading tubular textile goods includes a spreader arrangement with an inlet mandrel and an outlet mandrel at opposite ends thereof inside the tubular goods, an inlet support structure arranged around the inlet mandrel outside of the tubular goods with an inlet guide gap therebetween, and an outlet support structure arranged around the outlet mandrel outside of the tubular goods with an outlet guide gap therebetween. The mandrels and the support structures are magnetic, to magnetically repel each other across the guide gaps. The components may be permanent magnets or electromagnets, or have separate discrete magnets provided thereon. The spreader arrangement is supported by magnetic levitation relative to the support structures, without direct contact therebetween. The tubular goods pass through the guide gaps with low friction, no pressing force exerted thereon, and no impairment of the structure or quality thereof.Type: ApplicationFiled: October 29, 2002Publication date: May 1, 2003Applicant: Lindauer DORNIER Gesellschaft mbHInventor: Werner Strudel
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Publication number: 20030075230Abstract: A supply spool supplies a weft thread through an adjustable actuated thread brake and a thread tension sensor to a weft thread accumulator, from which an accumulated insertion length of the thread is provided to a weft insertion device. The tension sensor provides a measured actual thread tension signal to a control arrangement, which compares the actual tension to a selected rated tension, and, dependent on the deviation therebetween, provides a control signal to an actuator of the thread brake, so that the actual thread tension constantly corresponds to the selected rated tension. Another sensor provides a signal indicating a change from an empty spool to a full spool. Responsive thereto, the control arrangement actuates the thread brake to an adjustable starting brake setting as a coarse adjustment. Then the self-regulating fine adjustment is continued. A constant winding tension and thread accumulation length are achieved in the thread accumulator.Type: ApplicationFiled: October 16, 2002Publication date: April 24, 2003Applicant: Lindauer DORNIER Gesellschaft mbHInventors: Werner Birner, Herbert Reinhardt, Christian Hannes
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Publication number: 20030070721Abstract: The shed of a fluidic weaving loom is not changed simultaneously for all warp threads, but rather continuously starting at the weft entrance and continuing helically, so to speak, to the exit of the warp shed. This sequential shed closure takes place with a so-called domino effect along a helical line curved in space, whereby additional time is gained for stretching the inserted weft thread and temporarily stopping the shed formation or shedding is avoided.Type: ApplicationFiled: October 9, 2002Publication date: April 17, 2003Applicant: Lindauer DORNIER Gesellschaft mbHInventor: Adnan Wahhoud
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Publication number: 20030066602Abstract: 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: ApplicationFiled: October 7, 2002Publication date: April 10, 2003Applicant: Lindauer DORNIER Gesellschaft mbHInventors: Andreas Rutz, Adolf Mueller
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Publication number: 20030066569Abstract: 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: ApplicationFiled: October 9, 2002Publication date: April 10, 2003Applicant: Lindauer DORNIER Gesellschaft mbHInventor: Adnan Wahhoud
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Publication number: 20020170615Abstract: 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: ApplicationFiled: May 16, 2002Publication date: November 21, 2002Applicant: Lindauer DORNIER Gesellschaft mbHInventors: Markus Gielen, Adnan Wahhoud, Dieter Teufel, Peter Schiller, Matthias Armbrust
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Patent number: 6460577Abstract: 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: GrantFiled: March 7, 2002Date of Patent: October 8, 2002Assignee: Lindauer Dornier Gesellschaft mbHInventor: Valentin Krumm
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Patent number: 6450210Abstract: 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: GrantFiled: March 20, 2001Date of Patent: September 17, 2002Assignee: Lindauer Dornier Gesellschaft mbHInventors: Peter Schiller, Dieter Teufel
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Publication number: 20020124901Abstract: 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: ApplicationFiled: March 7, 2002Publication date: September 12, 2002Applicant: Lindauer DORNIER Gesellschaft mbHInventor: Valentin Krumm
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Patent number: 6439271Abstract: 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: GrantFiled: June 6, 2001Date of Patent: August 27, 2002Assignee: Lindauer Dornier Gesellschaft mbHInventors: Peter Schiller, Dieter Teufel, Markus Gielen
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Publication number: 20020112759Abstract: 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: ApplicationFiled: February 15, 2002Publication date: August 22, 2002Applicant: Lindauer DORNIER Gesellschaft mbHInventor: Siegfried Jaeger
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Patent number: 6431858Abstract: 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: GrantFiled: February 14, 2001Date of Patent: August 13, 2002Assignee: Lindauer Dornier Gesellschaft mbHInventor: Andreas Rutz