Selecting Patents (Class 139/453)
  • Patent number: 10472745
    Abstract: Apparatus and method for holding and feeding weft threads to the gripper of a weaving machine with drives, with which clamps for the weft threads are moved on motion paths into respectively a feed position, a transfer position and a ready position. The motion path of each clamp comprises a shape that is closed in itself. In that regard, the motion beginning of at least one of the clamps out of its ready position into its feed position takes place in a time segment that extends from the beginning of the beat-up motion of the weaving reed until the beat-up of the previously inserted weft thread against the beat-up line of the weaving machine.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: November 12, 2019
    Assignee: Lindauer DORNIER Gesellschaft mit beschraenkter Haftung
    Inventor: Markus Gielen
  • Publication number: 20120125476
    Abstract: A device (1) for transferring a preferably band-shaped weft material (6) from a feed unit to an insertion element (4) of a weaving machine comprises a clamping device (5) for clamping a free end (E) of the weft material (6). The clamping device (6) is conveyable essentially in the direction (BR) of motion of the insertion element (4) between at least two different operating positions. The device (1) includes a drive (8) for conveying the clamping device (5). In a method for transferring a preferably band-shaped weft material (6) from a bobbin or a feed unit to an insertion element (4) of a weaving machine, a free end (E) of the weft material (6) is clamped in a clamping device (5), the free end (E) is transferred to the insertion element (4), and then the clamping device (5) is opened and the weft material is inserted. The clamping device (5) is conveyed by means of a drive (8) essentially in the direction of motion of the insertion element (4) between at least two different operating positions.
    Type: Application
    Filed: July 6, 2010
    Publication date: May 24, 2012
    Applicant: LINDAUER DORNIER GESELLSCHAFT MBH
    Inventors: Thomas Laukamp, Herbert Mueller
  • Patent number: 7694697
    Abstract: The invention relates to a method and an apparatus for forming an insertion-side fabric selvedge (35) on a gripper weaving machine, whereby: a) selectively one of several weft threads (3, 4, 43, 44) that are provided on bobbins (1, 2, 41, 42) is positioned in the running path (5) of a gripper (6), while the other weft threads (3, 4, 43, 44) are held outside of the running path, whereby: b) the weft thread positioned in the running path is grasped and inserted into a loom shed by the gripper (6), whereby: c) thereafter the inserted weft thread (3) is beat-up against a binding line (33) by means of a weaving reed (31), whereby: d) the inserted weft thread (3) is cut-off on the insertion side directly after the beat-up, and e) the bobbin-side weft thread end of a respective cut-off weft thread (3) is respectively grasped and held by a different suction chamber of a suction chamber block (10, 20).
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: April 13, 2010
    Assignee: Lindauer DORNIER Gesellschaft mbH
    Inventors: Walter Lindenmueller, Leo Krez
  • Publication number: 20090151806
    Abstract: In some embodiments, a method includes providing a first controller; providing a second controller; using the second controller to control a plurality of valves to provide a sequence of air jets that propel a weft thread across at least a portion of a weft insertion region of an air jet loom; and using the first controller to control at least one aspect of the air jet loom not controlled by the second controller. In some embodiments, a method for a controller in an air jet loom includes (a) defining a reference loom configuration; (b) determining a characterization of the reference loom configuration; (c) determining a modified loom configuration by at least one change to the reference loom configuration; (d) determining a characterization of the modified loom configuration; and (e) revising the reference loom configuration if the characterization of the modified loom configuration satisfies a criteria.
    Type: Application
    Filed: September 15, 2008
    Publication date: June 18, 2009
    Inventors: John Wingate Jameson, Sarah Elizabeth Peach
  • Publication number: 20090014085
    Abstract: A control device (53) for a clutch assembly (11) of a dobby comprises a selecting finger (28) that is driven by an electromagnet (37). The selecting finger is rigidly connected to an armature (47) that has a curved armature section and a straight armature section. Together with an appropriately curved pole (45) of the magnetic circuit, the curved armature section forms an air gap (48) that is preferably not influenced by the pivot position of the selecting finger. The other pole (46) of the electromagnet (37) forms a preferably straight air gap (49), said air gap being variable and having a size that is a function of the pivot position of the selecting finger. Due to the existing lever ratios, the maximum width of the trapezoidal gap is substantially smaller than the path of the outer end of the selecting finger (28) between its two selection positions. The distance (A) between the pivot center (32) and the variable air gap (49) is substantially smaller than the length of the selecting finger (28).
    Type: Application
    Filed: June 25, 2008
    Publication date: January 15, 2009
    Applicant: GROZ-BECKERT KG
    Inventor: Armin Faller
  • Publication number: 20090000687
    Abstract: A shaft connecting device (18) that comprises a thrust rod (8) and a lateral support (4) that fit into each other with minimal transverse play. In addition, the shaft connecting device (18) comprises a clamping device (16) with a stop means (60, 60?, 66) and a fixation means (30, 30?), the latter connecting the lateral support (4) and the thrust rod (8) exclusively on their respective upper ends to each other. Any opening, closing and adjusting of the connections between the thrust rod (8) and the lateral support (4) is possible in a particularly simple and convenient manner. The lateral support (4) and the thrust rod (8) support each other, thus resulting in a high dynamic load-bearing capacity. The overall design is simple, clear and cost-effective.
    Type: Application
    Filed: June 26, 2008
    Publication date: January 1, 2009
    Applicant: Groz-Beckert KG
    Inventors: Karl-Heinz GESING, Johannes Bruske
  • Patent number: 7272244
    Abstract: The invention relates to a method for the production of images with high resolution jacquard fabric comprising the following steps: colour scanning of an output image to be reproduced on a fabric, video visualisation of said image with the largest number of colours possible with the means employed for said visualisation. The invention is characterised in that the method comprises further steps: selection of a number of base colours to be used for forming said image on said fabric, said number of base colours is related to the number of warp and weft threads which may be used in the loom and which are to be applied in the weaving of said fabric, reducing the original colours of the output image to a number of reduced colours which it is possible to produce by mixing the base colours of the warp and weft threads.
    Type: Grant
    Filed: September 19, 2001
    Date of Patent: September 18, 2007
    Assignee: Brevitex Etablissement pour l'Exploitation de Brevets Textiles
    Inventors: Alessandro Saporiti, Giovanni Saporiti
  • Patent number: 7219702
    Abstract: This invention concerns a weft thread clamp with two jaws (1), (2) that can be moved to an opened and closed position, with at least one jaw (1) being directly moveable to the closed position via fluid pressure. The moveable jaw is preferably (1) a moveable unit, preferably made of a light material or in a compact form, which is moveable as a complete unit under the influence of the fluid pressure. Such a weft thread clamp is more reliable and simpler, and has a quicker reaction speed than the known pneumatically controllable weft thread clamps. This invention also concerns a system for the presentation of weft threads to a weaving machine equipped with one or more such weft thread clamps, as well as a weaving machine equipped with such a presentation system.
    Type: Grant
    Filed: May 18, 2005
    Date of Patent: May 22, 2007
    Assignee: N.V. Michel Van de Wiele
    Inventors: Dominique Maes, Ferdi Dejaegere
  • Patent number: 7007723
    Abstract: The invention relates to a weft yarn clamp for clamping and releasing weft yarns of a weaving machine, the weft yarn clamp comprising a first and a second clamping element, at least one clamping element of which is a clamping means controlled by an actuator and the actuator comprising a pneumatic system, controlling a clamping means working against a spring force.
    Type: Grant
    Filed: April 22, 2002
    Date of Patent: March 7, 2006
    Assignee: N.V. Michel Van de Wiele
    Inventors: Johny Debaes, Ferdi Dejaegere
  • Patent number: 6948532
    Abstract: A method for the weft insertion in a jet weaving machine is proposed, in which in each work cycle a weft thread (S1) of predeterminable length which is to be inserted is drawn off from a winding drum (3) of a thread supply apparatus (2), the weft thread (S1) is inserted into an open shed (17) by means of a main nozzle (11) which is fed with a transport medium, is bound in into the cloth (G) through the change of shed, and is severed at the cloth edge which is near the main nozzle (11). In each work cycle the drawing off of the weft thread (S1) to be inserted is interrupted at least once in such a manner that at first a first predeterminable thread length is released for the drawing off from the winding drum (3) and then at least one further predeterminable thread length is also released for the drawing off from the winding drum (3).
    Type: Grant
    Filed: April 10, 2003
    Date of Patent: September 27, 2005
    Assignee: Sultex AG
    Inventor: Klaus Berktold
  • Patent number: 6840287
    Abstract: A weaving machine, in particular an airjet loom, which is fitted with a system (16) for cutting a filling thread (12?), which is being held ready for filling insertion, from a filling (12) already beaten into a fabric (10), wherein the system (16) includes a laser.
    Type: Grant
    Filed: June 9, 2004
    Date of Patent: January 11, 2005
    Assignee: Picanol N.V.
    Inventors: Jozef Peeters, Patrick Puissant
  • Patent number: 6810918
    Abstract: 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: Grant
    Filed: October 16, 2002
    Date of Patent: November 2, 2004
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventors: Werner Birner, Herbert Reinhardt, Christian Hannes
  • Patent number: 6763854
    Abstract: A weaving machine, in particular an airjet loom, which is fitted with a system (16) for cutting a filling thread (12′), which is being held ready for filling insertion, from a filling (12) already beaten into a fabric (10), wherein said system (16) includes a laser.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: July 20, 2004
    Assignee: Picanol N.V.
    Inventors: Jozef Peeters, Patrick Puissant
  • Patent number: 6725886
    Abstract: A device for presenting weft yarns (1), (2) to two (or more) rapiers provided above one another of a weaving machine, comprising two yarn carriers (14), which are movable between a receiving position, in which each yarn carrier (14) is able to receive a respective weft yarn (1), (2) to carry along this yarn, and a presenting position in which each yarn carrier (14) is able to present a weft yarn (1), (2) carried along to a respective rapier in order to insert this yarn into a shed. The presenting arms (3), (4) are rotatable above one another in respective intersecting planes of movement. Preferably, the upper presenting arm (3) is rotatable in a horizontal plane of movement, while the lower presenting arm (4) is rotatable in a plane of movement that is inclined downwards in the direction of the presenting position. With a similar presenting device the weft yarns can be taken up very close to the fell of the fabric and cut through, waste selvedges becoming unnecessary and weft yarns can be saved.
    Type: Grant
    Filed: April 22, 2002
    Date of Patent: April 27, 2004
    Inventors: Ferdi Dejaegere, Johny Debaes
  • Publication number: 20030178089
    Abstract: The invention relates to an improvement in the art of loom and weaving room conditioning, in which the necessary moisture required by the yarn to perform best in the loom is metered exactly and directly on the yarn, whereby yarn breakage is reduced and weaving air room humidity can be lowered, thereby improving human comfort. Lint and dust generated by the weaving process are removed at their source so air contamination is lowered, improving hygienic conditions and reducing air filtration requirements. Heat generated by the weaving process is partly removed by water-cooling the lubricating oil, thereby reducing the weaving room heat load. Large peripherally located air conditioning units are replaced by smaller units, distributed over or under the roof of the room, each serving the area of 4-24 looms.
    Type: Application
    Filed: March 22, 2002
    Publication date: September 25, 2003
    Inventor: Hans Adolf Beeh
  • Patent number: 6539982
    Abstract: A loom with an insertion brake disposed between a yarn feeder and the shed of the loom, which insertion includes a movable brake element, which is capable of movement between two fixedly disposed yarn guides from a position of rest on one side of the yarn to an operative position on the other side of the yarn. The movable brake element is connected to a driving motor, the excitation of which is controlled by an electronic system, in which at least one program for the time and the position of the movable brake element is incorporated. The electronic system includes a position detection sensor for sensing the instantaneous position of the brake element.
    Type: Grant
    Filed: October 19, 2001
    Date of Patent: April 1, 2003
    Assignee: Te Strake Textile B.V.
    Inventor: Gijsbertus De Swart
  • Patent number: 6305435
    Abstract: The weaving machine contains an insertion system for a plurality of generally different weft threads, which comprises for each weft thread a thread supply (2), a thread store (3) and a color selector (4) for the selective serving of the weft threads as well as a rapier (10) for inserting the served weft thread. At least one common thread brake (7) is provided for all weft threads (1) in order to brake the respective served weft thread (1) during the insertion as required. In addition to the simple mechanical construction, the simple handling and controlling are seen as advantageous.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: October 23, 2001
    Assignee: Sulzer Textil AG
    Inventors: Karl Meier, Dietmar Markward
  • Patent number: 6230760
    Abstract: The apparatus contains a linear motor (1) with a stator (4) which has two permanent magnets (7) and with an armature (5) which has a winding (22), and a thread server finger (2) for the weft thread which is connected to the linear motor in order to present the weft thread to a rapier. The linear motor (1) and the thread server finger (2) are designed as a modular assembly.
    Type: Grant
    Filed: January 14, 2000
    Date of Patent: May 15, 2001
    Assignee: Sulzer Textil AG
    Inventors: Gianfranco Di Natale, Beat Vollenweider
  • Patent number: 6220307
    Abstract: A mechanism for a gripper Axminster loom is disclosed which includes a plurality of yarn carriers each of which is movable to any one of a plurality of predetermined positions. Each carrier guides a plurality of tuft yarn and is arranged to present one of the yarns to a gripper when the carrier is located at a corresponding one of the predetermined positions. The mechanism includes a plurality of independently controllable rotary drive motors, each of which is connected to drive an associated carrier for selectively moving the associated carrier to a selected one of the predetermined positions.
    Type: Grant
    Filed: January 21, 2000
    Date of Patent: April 24, 2001
    Assignee: Griffith Textile Machines Limited
    Inventor: John D. Griffith
  • Patent number: 6119733
    Abstract: A weft thread clamp for a weft thread presenting lever is positively actuated to selectively open or close the clamp and thereby release or hold the weft thread respectively. To achieve this, a second clamp element is movable or deflectable relative to a first clamp element of the clamp. The movable second clamp element may be directly embodied as an actuator, or may be driven by an actuating motion provided by an actuator located remotely from the clamp on the lever. In the latter case, a motion transmission arrangement such as a sheathed push-pull cable or a rod linkage operatively connects the actuator to the movable second clamp element. The actuator may be a piezoelectric, electromagnetic, hybrid pneumatic-electric, or hybrid hydraulic-electric device, or an electric motor. The loom control unit is connected to the actuator for providing control signals thereto.
    Type: Grant
    Filed: November 16, 1999
    Date of Patent: September 19, 2000
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventors: Stephan Arndt, Horst Haeussler, Kurt Motz, Peter Schiller
  • Patent number: 6112776
    Abstract: The weaving machine with a weft monitoring insertion system (1) for a large number of different weft threads (11, 11', 11") comprises a weft insertion member (6, 60), thread brakes (3), a weft thread selector (4) for the serving of a thread (11, 11', 11") or of more than one thread at the same time, a thread monitor (51) for weft threads (11) which are correctly inserted, and an electronic and programmable control member (8) for the setting of the thread brakes. The weft threads (11), when correctly inserted, form incoming angles (.alpha.) at the thread monitor in the presence of a deflection which depend on the choice of the weft thread. Utilizing the thread monitor (51) a signal can be produced for the control member (8) which is dependent on the incoming angle and the thread tension. Control signals can be calculated and produced in the control member as a result of this signal and as a result of information on the current serving of the weft thread or of the weft threads, i.e.
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: September 5, 2000
    Assignee: Sulzer Textil AG
    Inventor: Klaus Berktold
  • Patent number: 6053216
    Abstract: A thread tensioning and drawing-back device for pile warp threads of a weaving machine, which device comprises provisions (2) for braking, by spring elements, pile warp threads (4) taken up by a weaving machine, and provisions (5) for drawing back the pile warp threads (4) in case of variations of warp length resulting from changing the shed position of the weaving machine, in which the provisions (2) for braking the pile warp threads (4) consist of disk springs (2) placed next to each other in a row on a horizontal spindle (3), each provided for braking one pile warp thread (4). The device can furthermore comprise preferably detachable tension spindles (11), (12) at the entrance to the disk yarn brakes (2) and at the exit from the disk yarn brakes (2).
    Type: Grant
    Filed: April 8, 1998
    Date of Patent: April 25, 2000
    Assignee: N.V. Michel Van de Wiele
    Inventors: Johnny Debaes, Nico Seynaeve
  • Patent number: 6026864
    Abstract: A modular device for weft yarn presentation in a shuttleless loom, operated by linear electric motors which present the yarn by using rods mounted on sliders which rotate to transition the rods from raised standby positions to lowered delivery positions. The linear motors include fixed plates and pivotally mounted sliders, each carrying a rod. The fixed plates are assembled such that the plates angularly diverge from one another from adjacent the pivotal mounting between the sliders and plates and form acute angles therebetween. By using this arrangement, the delivery segment for the yarns is significantly shorter and the angle of presentation of the yarns is substantially narrower.
    Type: Grant
    Filed: May 11, 1998
    Date of Patent: February 22, 2000
    Inventors: Luciano Corain, Luigi Corazzola, Giulio Bortoli
  • Patent number: 6026865
    Abstract: A controlled weft thread presenting and clamping arrangement minimizes weft thread waste and ensures proper tensioning of the weft thread during its presentation to the insertion gripper, in a gripper loom for weaving with plural different weft threads. The arrangement includes a control shaft (13) that has a drive key (14) protruding therefrom in a reference plane (7), and that is rotatably supported on a support bracket (10, 11, 12), which may be mounted on the loom. Weft thread presenting levers (15) each carrying a respective clamp (16) are movably arranged on the shaft (13), which passes through a hole in each of the presenting levers (15). A translational drive (22) acts on a presenting lever support (17) to translationally move all of the presenting levers (15) in unison together axially along the shaft (13) until a selected lever (15) is positioned in the reference plane (7), with the lever's drive groove 15B engaged on the drive key (14) of the shaft (13).
    Type: Grant
    Filed: September 9, 1998
    Date of Patent: February 22, 2000
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventors: Valentin Krumm, Horst Haeussler, Stephan Arndt, Siegbert Gsell, Peter Schiller, Herbert Mueller
  • Patent number: 6006795
    Abstract: A device for weft yarn presentation in a shuttleless loom is operated by linear electric motors. The motors include fixed plates and movable plates pivotally mounted to the fixed plates. Yarn presenting rods are carried by the pivotal plates and rotate from raised stand-by positions to lowered delivery positions. The respective axes of rotation of the pivoted plates are arranged on a line skewed to the path of movement of the gripper so that the weft yarn delivery positions are close together.
    Type: Grant
    Filed: May 11, 1998
    Date of Patent: December 28, 1999
    Inventors: Luciano Corain, Luigi Corazzola, Giulio Bortoli
  • Patent number: 5725029
    Abstract: An apparatus for reducing the load on a weft thread being inserted into a loom shed reduces the necessary number of weft thread monitors or stop motion devices functioning as thread tension sensors while still ensuring a reliable tension measurement, especially in a gripper loom in which a plurality of different weft thread types are to be respectively inserted into the loom shed using a weft thread selector and insertion arrangement. A single first thread tension sensor (14) is provided to be common to all of the weft thread types (6) that are to be inserted. The sensor (14) is arranged in a first arrangement plane at a location downstream of the weft thread selector and change arrangement (8). A single second thread tension sensor (19) is arranged in a second arrangement plane at a location between the first thread tension sensor (14) and the weft thread selector and change arrangement (8).
    Type: Grant
    Filed: September 18, 1996
    Date of Patent: March 10, 1998
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventors: Heinz-Peter Loehr, Rainer Schuster
  • Patent number: 5694982
    Abstract: A weft selection device for a weaving machine has at least two drop wires with feed-through eyes. The drop wires are fixed rotatably in two planes lying above one another to take a weft thread extending through the feed-through eye within or beyond the reach of a gripper. Each drop wire has a bent end containing the feed-through eye. The drop wires are fixed rotatably in pairs on common fixing device. The top drop wire of each pair is bent upwards and the bottom drop wire of each pair is bent downwards. A free space is provided above and below the fixing device of each pair to allow through unimpeded the weft threads. Thus, it allows for an arrangement with a minimum angle of bend of the weft threads after they have passed through the feed-through eyes. The present weft change motion is suitable for coarse and stiff yarn.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: December 9, 1997
    Assignee: N.V. Michel Van de Wiele
    Inventor: Johnny Debaes
  • Patent number: 5544679
    Abstract: A feed mechanism for several weft yarns, each with its own feed device capable of selecting the weft yarn to be inserted, includes sensors for monitoring the weft yarns for quality defects and for, upon detection a defect in a weft yarn, precluding the weft yarn from being selected for insertion until the portion of the weft yarn with the defect has been shunted into a region from where it can no longer be woven into the fabric.
    Type: Grant
    Filed: November 29, 1994
    Date of Patent: August 13, 1996
    Assignee: Picanol N.V.
    Inventor: Jo Tacq
  • Patent number: 5501250
    Abstract: Method to delete and reintroduce individual yarns as needed when they are being fed to a textile process by cutting an individual yarn, that is being forwarded to the process, rapidly to prevent producing a disruptive tension change in the process or in other yarns being forwarded to the process to produce an upstream cut end of an individual yarn; holding the upstream cut end of said individual yarn in an elongated condition at a ready position for reintroducing to the process; and reintroducing said yarn at said ready position to the textile process according to the following steps; metering said individual yarn from said source at a controlled rate; passing said cut end of yarn with a first individual yarn forwarding jet for forwarding said cut end from said ready position and maintaining said cut end of yarn in an elongated condition during said metering; directing said elongated, cut end of yarn in a path past an individual yarn cutter; passing for forwarding said elongated cut end of yarn from said cutt
    Type: Grant
    Filed: November 22, 1994
    Date of Patent: March 26, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Donald W. Edwards, Peter Popper, David P. Rule, William C. Walker
  • Patent number: 5492153
    Abstract: A weft yarn presentation apparatus has a weft sequence control having weft thread presenting devices (1), a controlled thread clamping device (2) with several clamps (3a-3f) and a guide member (4) with a slit (5). The association of the weft thread presenting devices (1) with the clamps (3a-3f) guarantees that there is no cross-over of the tracks of the weft threads, and the displacement of the clamps in the reference plane (6) does not influence these tracks. The weft thread is presented to the gripper in the reference plane (6), through matching of the movements of the clamp and of the associated weft thread presenting device (1) so that contact between the weft threads is prevented.
    Type: Grant
    Filed: August 12, 1994
    Date of Patent: February 20, 1996
    Assignee: Sulzer Rueti AG
    Inventors: Angelo Stacher, Theo Thalmann
  • Patent number: 5477892
    Abstract: A device for continuously regulating the feeler sensitivity in the control of weft insertion in a loom. The device includes a selector having a memory into which the sensitivity value corresponding to the count of the weft passing through the eye of each rod is fed. The selector is electrically connected to a piezoelectric sensor-comparator, and is controlled by a logic control unit. The logic control unit provides electrical pulses or signals for selecting weft presenter rods of a presenter, and the same signal from the logic control unit is provided to the selector, such that the selector utilizes the signal from the logic control unit for providing the feeler sensitivity information to the sensor-comparator.
    Type: Grant
    Filed: May 9, 1994
    Date of Patent: December 26, 1995
    Assignee: Nuovopignone-Industrie Meccaniche E Fonderia S.p.A.
    Inventors: Luciano Corain, Ruggero Manzardo
  • Patent number: 5458163
    Abstract: A weft thread or weft threads are selected from a plurality of weft thread supply spools in a shuttleless loom for presenting the selected weft thread or weft threads to the gripper of the gripper rod. In order to equip each loom with the required number of weft selector and needle moving devices and in order to make these devices exchangeable, the individual selector and needle moving devices are constructed as insert cassettes which are exchangeable against one another as desired. For this purpose the exchangeable cassette which is equipped with an electric drive motor and preferably also with a control for the electric drive motor, is combined with a carrier and guide mechanism for supporting the cassette and guiding the respective weft presenting needle. Each cassette comprises at least one weft presenting needle and each cassette is individually connected in a releasable manner to the carrier and guide mechanism and independently of all other cassettes.
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: October 17, 1995
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventors: Walter Lindenmuller, Rainer Schuster
  • Patent number: 5425399
    Abstract: A weft picking system for an air jet loom is provided with a microcomputer as a controller. The weft picking system comprises a weft traction device including a pair of rollers, one of which is driven by an inverter motor. A weft yarn fed from a weft measuring and storing device can be placed between the rollers to be drawn toward a weft posture regulating nozzle. The weft posture regulating nozzle is arranged to project the weft yarn into the shed of warp yarns and regulates the posture of the weft yarn under the influence of air jet ejected from the nozzle and from a plurality of sub-nozzles. The rollers always rotate during a weaving operation of the loom. A change-over device is provided to change the weft yarn from a first state of being placed between the rollers to a second state of separating from the rollers or vice versa.
    Type: Grant
    Filed: April 14, 1994
    Date of Patent: June 20, 1995
    Assignee: Nissan Texsys Co., Ltd.
    Inventors: Akio Shindo, Takao Ishido, Takatugu Kato, Ryozo Yuzawa, Masaichi Nishijima, Yuji Kato, Nobuhiko Hayashi, Takashi Ogasawara, Kenichi Nakajima, Tetsuhiro Kajiwara, Shogo Sasaki
  • Patent number: 5406986
    Abstract: A faulty weft separating apparatus in a rapier loom for multiple colors which separates a faulty weft from other normal wefts and removes the faulty weft by way of a weft removing apparatus when a faulty weft insertion occurs. A set of guiding members are disposed on the insertion side of a fabric and when a weft is inserted properly, the guiding members are located at the retraction position to store the inserted weft in a storage section. When a faulty weft insertion occurs, the guiding members swing to the fabric winding side to allow the faulty weft to enter a positioning section, thus separating the faulty weft from other normal wefts. The separated faulty weft is picked up by a hook and wound by a weft removing apparatus.
    Type: Grant
    Filed: September 30, 1993
    Date of Patent: April 18, 1995
    Assignee: Tsudakoma Kogyo Kabushiki Kaisha
    Inventors: Kiyoyasu Oda, Akihiko Yamamoto
  • Patent number: 5400834
    Abstract: In an apparatus for selecting and feeding wefts to an insertion device of a weaving machine, the feeders are directly connected to eccentric drives which have an excursion corresponding at least to the paths covered by the feeders between their rest and feed positions, and each feeder is associated with a guide and arranged to compensate for transverse displacements of the eccentric drives which deviate from the reciprocating motions of the feeders. The feeders have an excursion corresponding to at least the distance between the rest and feed positions of the feeder, with each feeder together with a drive motor, the eccentric drive, and the guide forming a module to simplify matching of yarn feeders to the requirements of a specific fabric and exchange of units in case of a defect. Advantageously, the modules of neighboring feeders may be mounted in mirror-symmetric manner relative to a common plane in which all of the feeders are mounted.
    Type: Grant
    Filed: November 3, 1993
    Date of Patent: March 28, 1995
    Assignee: Picanol, N.V.
    Inventors: Dirk Lewyllie, Bernard Vancayzeele, Geert Geerardyn
  • Patent number: 5295516
    Abstract: A method of operating a direct weaving apparatus which may include a loop provided with picking nozzles and a weft yarn processing machine having a yarn processing unit for processing yarns, feed rollers and yarn storage drums. The start of the yarn storage drums may be controlled in connection with the start of the weft yarn processing machine. The respective operating speeds of the feed rollers of the weft yarn processing machine may be held constant and the yarn storage drums may be operated in synchronism with the corresponding feed rollers respectively at winding speeds slightly higher than the respective feed speeds of the corresponding feed rollers.
    Type: Grant
    Filed: July 7, 1992
    Date of Patent: March 22, 1994
    Assignee: Murata Kikai Kabushiki Kaisha
    Inventors: Tadashi Tanaka, Yasuhiro Inoue, Hirohiko Iida, Morio Sakurai, Kazuro Tokuda
  • Patent number: 5293907
    Abstract: A loom speed controlling apparatus includes a counter adapted to output a current pick number, a data memory for storing the maximum allowable loom speed values depending upon physical characteristics of various filling yarns in correlation with pick numbers, and a discriminator for determining a target rotational speed of a driving motor for the loom in accordance with the current pick number supplied from the counter and data supplied from the data memory. An indexing signal generator is connected to an input of the counter and an inverter for variable-speed operation of the loom driving motor is connected to an output of the discriminator and the index signal generator includes a plurality of proximity switches adapted to be disposed close to a loom spindle and the indexing signal generator.
    Type: Grant
    Filed: September 11, 1992
    Date of Patent: March 15, 1994
    Assignee: Tsudakoma Kogyo Kabushiki Kaisha
    Inventor: Zenji Tamura
  • Patent number: 5247968
    Abstract: A projectile loom is distinguished by a combination wherein a weft yarn changer (1) has a low-weight body (11) and low-weight yarn transfer elements (2) and the multiple weft device is driven directly by a highly dynamic servo motor (3). The loom can be operated at speeds above 350 rpm. The changer body (11) is made, for example, of aluminum and the slide bar (2a) of the yarn transfer element (2) is made of a mixture of plastics and fibers.
    Type: Grant
    Filed: September 1, 1992
    Date of Patent: September 28, 1993
    Assignee: Sulzer Brothers Limited
    Inventors: Oskar Hubner, Rudolf Stauner
  • Patent number: 5209272
    Abstract: A weft yarn changer on a projectile loom has a pivoted changer member (1) for at least two yarn transfer elements (2) each in the form of a slide rod (2a) and a yarn gripper (21). Slide bars for the yarn transfer elements (2) are provided on the changer member (1) and are connected by at least one lightweight plastics holder to a tube effective as a drive shaft of the changer member or as a pivot spindle. The inventive weft yarn changer yields reduced actuation times.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: May 11, 1993
    Assignee: Sulzer Brothers Limited
    Inventors: Peter Riesen, Marc Gianotti
  • Patent number: 5186218
    Abstract: A weft yarn changer on a projectile loom has a pivoted changer member (1) for at least two yarn transfer elements (2) each in the form of a slide rod (2a) and a yarn gripper (21). The slide rod (2a) is made of plastic and is longer radially than tangentially in the pivoting direction relative to the pivoting axis. A duct (24) oriented in the sliding direction forms a cavity which is particularly suitable as a yarn guide. The inventive yarn changer has short actuation times.
    Type: Grant
    Filed: March 17, 1992
    Date of Patent: February 16, 1993
    Assignee: Sulzer Brothers Limited
    Inventor: Peter Riesen
  • Patent number: 5179980
    Abstract: A yarn brake which can be used in projectile looms and rapier looms is actuated by a stepping motor with the rotational movement of a drive shaft of the stepping motor being converted to a linear movement of the braking member of the yarn brake.
    Type: Grant
    Filed: September 4, 1991
    Date of Patent: January 19, 1993
    Assignee: Sulzer Brothers Limited
    Inventors: Oskar Hubner, Rudolf Stauner
  • Patent number: 5172735
    Abstract: A weft thread selecting and supplying device has an electronically controllable electric motor (2) with a drive wheel (4) and a guide wheel (5), and a gear belt (6) which loops around these wheels. Thread suppliers (7, 7a) are connected to both longitudinal runs of the gear belt (6) and staggered relative to each other so that one thread supplier (7a) is in a ready position (B) and the other is in a transfer position (U). The thread suppliers (7, 7a) have thread eyes (9) through which the weft threads (17, 17a) run. In the ready position (B) the weft thread (14a) is outside of the take along range of a weft thread insertion gripper head (15). In the transfer position (U) the weft thread (17) is in a position to be gripped by the gripper head (15). The electric motor (2) rotates the drive wheel (4) in accordance with the pattern being woven and in synchronism with the weaving cycle, whereby the drive wheel (4) moves the gear belt (6).
    Type: Grant
    Filed: October 4, 1991
    Date of Patent: December 22, 1992
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventor: Walter Kleiner
  • Patent number: 5103876
    Abstract: The metering device for metering the weft yarn of a loom comprises a metering roller which is disposed between a supply unit and a draw off unit and which, in metering operation, is wrapped around by the weft yarn and determines the weft yarn draw off speed. In the event of a weft yarn break, a new waft start is injected past the metering roller into a catching nozzle and by way of a deflector into a yarn accumulator. A brake terminates the injection step. While a draw off element applies tension to the yarn, the yarn is wrapped automatically and in a number of turns around the metering roller by being moved into a catching zone of a catcher, which is rotatable around the metering roller axis, through the agency of a relative movement between the injected weft yarn and the catcher. During one revolution of the catcher around the roller axis, the weft yarn is deposited on the metering roller in the form of a wrapping.
    Type: Grant
    Filed: February 26, 1991
    Date of Patent: April 14, 1992
    Assignee: Sulzer Brothers Limited
    Inventors: Rolf Benz, John D. Griffith
  • Patent number: 5090457
    Abstract: Device for selection and presentation of the weft yarns for high-speed looms, in which the mechanism of selection of the weft yarns comprises a set of collars, each equipped with an iron armature. The collars are slid through a free end of selectors and cooperate with a transverse lifting beam as well as with a corresponding set of permanent magnets equipped with a coil in order to nullify the magnetic field generated by the same magnet.
    Type: Grant
    Filed: June 22, 1990
    Date of Patent: February 25, 1992
    Assignee: Nuovopignone-Industrie Meccaniche e Fonderia S.p.A.
    Inventors: Luciano Corain, Gianni Maitan, Luigi Corazzola
  • Patent number: 5090456
    Abstract: A picking apparatus of a rapier loom has gripping bodies between a weft selection device and a yarn cutter. The gripping bodies are movable up and down. The gripping bodies selectively grip a plurality of weft yarns in accordance with a color pattern. One yarn cutter cuts the weft yarn gripped by the gripping bodies and severs the cut weft yarn from a woven cloth after the weft yarn is picked. Thus, neither catch cords nor an extra length of fringe nor a selvage cutter are needed.
    Type: Grant
    Filed: October 4, 1990
    Date of Patent: February 25, 1992
    Assignee: Tsudakoma Corp.
    Inventor: Junya Kasahara
  • Patent number: 5074340
    Abstract: A yarn selector unit of a loom has a number of feeders associated one each with a weft yarn. Each feeder is drivable by a tongue drivable selectively via a lever by way of a slide. The tongue and therefore the feeder are moved into a different position when it is required to present a weft yarn to a gripper or withdraw a weft yarn. The tongue is moved transversely by two actuators disposed opposite one another into a predetermined top or bottom position relative to the actuators by the action therefor. Positioning of the tongue relative to a tongue-moving slide is therefore always clearly defined so that misactuation of the yarn selector unit cannot occur.
    Type: Grant
    Filed: May 22, 1990
    Date of Patent: December 24, 1991
    Assignee: Sulzer Brothers Limited
    Inventors: Fredy Oderbolz, Robert Szonyi, Walter Stark
  • Patent number: 5031671
    Abstract: The weft yarn changer includes a multi-pivot transmission which is driven by a thrust rod. In addition, the thrust rod is driven by a rocking lever which can be coupled and uncoupled from the thrust rod by an actuating element in the form of a double-acting solenoid. When a weft change is to the effected, the solenoid actuates a tappet to deflect the thrust rod laterally so that a pin on the rocking lever engages in a bore of the thrust rod in order to couple the thrust rod to the rocking lever for a subsequent actuating motion.
    Type: Grant
    Filed: July 5, 1990
    Date of Patent: July 16, 1991
    Assignee: Sulzer Brothers Limited
    Inventor: Peter Riesen
  • Patent number: 5020573
    Abstract: A control mechanism for the selection of the weft yarns in rapier looms with presenting needles on presenting levers, controlled by a plurality of levers and connecting elements from a series of electro-magnets, wherein the presenting and control levers can moves rotatably to and fro about the respective shafts on which they are mounted.
    Type: Grant
    Filed: January 23, 1990
    Date of Patent: June 4, 1991
    Assignee: N.V. Michel Van de Wiele
    Inventor: Johnny Debaes
  • Patent number: 5016676
    Abstract: In a loom a weft filament is fed from a supply and inserted in a weft direction through a warp so as to project from a downstream edge of the warp and the presence of the filament is detected by a sensor at the downstream edge. If no presence is detected, a deweaving device is operated that in a deweaving step strips the filament from the warp and ejects it therefrom past the sensor. A controller is connected to the sensor and loom for shutting down the loom when the sensor detects that no filament is ejected by the deweaver during and immediately after the deweaving step, shutting down the loom when the sensor detects a filament immediately after the deweaving step, and restarting the loom when the sensor detects a filament during but not immediately after the deweaving step.
    Type: Grant
    Filed: February 7, 1990
    Date of Patent: May 21, 1991
    Assignee: S. A. Saurer Diederichs
    Inventors: Roger Fourneaux, Gilles Grandvallet
  • Patent number: 5012844
    Abstract: A loom is provided with a closed path for the weft yarn from a yarn package to a picking nozzle. A first yarn guiding passage extends from a yarn clamp to a weft yarn storage device while a second yarn guiding passage extends from the storage device to the picking nozzle. Sensors are disposed along the path of the yarn in order to sense the presence or absence of a thread for searching/rethreading purposes. The second yarn guiding passage is articulated to the storage device and the picking nozzle in order to follow movements of the picking nozzles relative to a reed.
    Type: Grant
    Filed: October 4, 1989
    Date of Patent: May 7, 1991
    Assignee: Sulzer Brothers Limited
    Inventor: John D. Griffith