By Gripper Needle On Insertion Stroke Patents (Class 139/444)
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Patent number: 8875747Abstract: A gripper head for the insertion of weft threads on a gripper weaving machine as well as a gripper weaving machine with such a gripper head. The gripper head thread clamp for the weft thread is controlled in a contact-free manner and with high transfer reliability of the weft thread even in the machine center.Type: GrantFiled: September 15, 2011Date of Patent: November 4, 2014Assignee: Lindauer DORNIER Gesellschaft mbHInventor: Markus Gielen
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Patent number: 7543610Abstract: A thread clamp for a rapier head (1) is presented which contains a clamping part (4) for firmly clamping a weft thread (3) and an actuator (5) for moving the clamping part (4). The actuator (5) includes a ferromagnetic core (12), an armature (11) and at least one winding (13) which is arranged on the core or armature in order to produce a magnetic field in the latter and to move the armature and the clamping part, which is operatively connected to the latter, with the core (12) having two limbs (12.1, 12.2) between which the armature (11) is movably arranged, and with each limb being provided with a permanent magnet (14.1, 14.2) in order to hold the armature at one of the two rest positions in the current-free state of the winding.Type: GrantFiled: June 11, 2007Date of Patent: June 9, 2009Assignee: Sultex AGInventors: Erich Kläui, Marius Bachofen, Dietmar Markward
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Patent number: 7231943Abstract: A power weaving loom includes weft thread insertion and collecting bands (6, 7). Drive units drive the bands and cause leading parts of the bands to move towards and away from one another between sides of the weaving machine and an approximately half-width position (13) of the machine. The bands include grippers (6b, 7b), which allow the weft thread to be drawn from a first side of the machine to the approximately half-width position and then to a second side of the machine. The drive units include servomotors which are coordinated to act upon the bands via motion-transmitting members with a torque that allows inward and return motions of the bands during brief shedding times, thus providing high machine picking speeds even in machines of great width.Type: GrantFiled: December 29, 2003Date of Patent: June 19, 2007Assignee: Texo ABInventor: Stefan Svensson
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Patent number: 7128098Abstract: A thread section of a weft thread is held precisely ready for a receiving rapier in a feed rapier on a rapier loom despite the effects of retarding forces. Deflections of the thread section by the head of a receiving gripper are compensated for, whereby the feed rapier is provided with a thread clamp on the side facing the feed device for the weft thread, which releases on tension forces occurring in the thread section and permits a deflection of the thread section.Type: GrantFiled: September 20, 2002Date of Patent: October 31, 2006Assignee: Picanol N.V.Inventor: Eddy Verclyte
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Patent number: 7114530Abstract: A receiving gripper for a rapier loom, wherein at least the moving part is made of a ceramic material.Type: GrantFiled: February 8, 2002Date of Patent: October 3, 2006Assignee: PICANOL N.V.Inventors: Denis Moeneclaey, Patrick Strubbe
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Patent number: 7044174Abstract: A stop element (24) is used to open a gripper clamp (20) of a weaving machine (3) and is associated to the gripper clamp's stop piece (21) and the stop element during the slow mode operation of the weaving machine is transversely moved into the path of the gripper clamp's stop piece (21) after the clamp already has moved into the vicinity of the stop element (24).Type: GrantFiled: June 25, 2002Date of Patent: May 16, 2006Assignee: Picanol N.V.Inventor: Patrick Strubbe
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Patent number: 6988516Abstract: A device for driving and guiding a rapier of a weaving machine, comprises a rotatable drive wheel (1) provided for driving a rapier rod (14) in a back and forth movement and a guide channel formed by adjustable guide bodies (10), (11) in order to guide the said rapier rod (14) according to a guide path in co-operation with the drive wheel (1). The guide bodies (10), (11) are part of a guide unit (9) which, as a whole, is adjustable in order to modify the distance between the guide path and the rotation shaft (2) of the drive wheel (1), and where the drive wheel (1) is continuously adjustable in the longitudinal direction of its shaft (2). With this device the clearances of the rapier rod with respect to the drive wheel can be performed easily, rapidly and with great precision, so that this device is able to work with a minimum development of heat and wear.Type: GrantFiled: August 29, 2002Date of Patent: January 24, 2006Assignee: N.V. Michel Van de WieleInventors: Johny Debaes, Dominique Maes, Jo Hullebusch
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Patent number: 6845792Abstract: Thread clamping arrangement for a carrier gripper of a rapier loom wherein the arrangement includes a rigid support coupled to a lateral wall of a body of the carrier gripper. Each of an elongated first clamping element and an elongated second clamping element are provided. A clamping gap is formed by the first and second clamping elements. A magnet is included that exerts an attracting force on each of the first and second clamping elements.Type: GrantFiled: April 1, 2002Date of Patent: January 25, 2005Assignee: Gividi-Italia SpAInventors: Diego Armando Scari, Marco Scari
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Patent number: 5862837Abstract: A thread holder comprises two holding members which form a gap that has a round cross-sectional shape and increasing width. Each of the thread holders is journalled on the other holding member at at least one bearing location which is executed as a bearing surface. With this arrangement the journalled holding member can easily assume a holding position that is ideal for a thread being used. The thread holder is suitable in particular for a bringer rapier of a rapier weaving machine.Type: GrantFiled: October 15, 1996Date of Patent: January 26, 1999Assignee: Sulzer Rueti AGInventors: Kurt Guenther, Anton Egloff, Paul Lincke
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Patent number: 5114775Abstract: A gripper rod for shuttleless looms has a toothed rack made of fiber reinforced composite material. The prepregs are stacked in such a way that the fiber orientation in one layer crosses the fiber orientation of at least one neighboring layer. A sufficient number of layers are preferably stacked relative to a central plane of symmetry. The so prepared stack is then placed into a pressing die to form the toothed rack configuration. Due to the pressing, the initial fiber orientation changes so that the fibers after the pressing extend approximately in parallel to the surfaces of the toothed rack, especially at the tooth flank forming surfaces and along the edges, whereby the strength of the toothed rack and the wear and tear resistance, especially of the tooth flanks is improved. The angular orientation of the fiber directions relative to a longitudinal edge of a prepreg may be within the range of about 15.degree. to about 25.degree.Type: GrantFiled: April 25, 1990Date of Patent: May 19, 1992Assignee: Lindauer Dornier Gesellschaft m.b.HInventors: Rainer Gsell, Philip White
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Patent number: 4558722Abstract: In a shuttleless weaving machine wherein the filling yarn is inserted from both sides of the shed by means of gripper systems provided with filling yarn clamping devices and advanced into and then retracted from the shed. The filling yarn is transferred from one gripper system to the other by a controlled opening and closing of the clamping devices. For this purpose, a guide rod mounted in a straight guide on the reed stay and displaceable toward the shed is provided, which is equipped at its end with a control finger. The control finger passes through the warp yarns of the shed and actuates the clamping device in the shed. The control motion is transmitted through a cam follower roller mounted on a rocker lever hinged to a coupling link which in turn is pivoted or hinged to the guide rod. The control finger is entirely pulled downwardly out of the shed for the reed beat-up. The masses which must be accelerated together with the reed are low and control finger vibrations are eliminated.Type: GrantFiled: March 20, 1984Date of Patent: December 17, 1985Assignee: Lindauer Dornier Gesellschaft mbHInventors: Fritz Gehring, Stephan Arndt, Harald Storr
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Patent number: 4320785Abstract: A mechanism on shuttleless looms for the transfer of the end 17' of the weft yarn from a yarn holder 26, 27 on a nosegripper 6 of a yarn insertion needle to a yarn clamp 13, 14 arranged on the machine frame and immovable in the weft direction. The yarn clamp 13, 14 includes a carrier which can move to swing in time with the reed 2 and has two oscillating levers 7, 10 which carry at their ends the jaws 13, 14 which grip the weft yarn. The one oscillating lever 7 is connected rigidly to the carrier, while the other lever 10 is stressed elastically via a rubber sleeve 12 into the gripping position with the one oscillating lever 7. The jaw 14 is held back by cooperation with a stop 15, while the jaw 13 moves on. The yarn clamp 13, 14 hereby automatically gets spread for the release of the end of the weft yarn or respectively for accepting the next weft yarn end.Type: GrantFiled: February 4, 1980Date of Patent: March 23, 1982Assignee: Adolph Saurer LimitedInventor: Rudolf Zwiener
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Patent number: 4100941Abstract: A rapier for use with a rapier loom has a drive member which is spaced laterally from the rapier but extends parallel to the rapier, the rapier and drive member being connected together by the butt end of the rapier, so that in use the drive member can pass underneath the shed and need not enter the shed with the rapier.Type: GrantFiled: June 4, 1976Date of Patent: July 18, 1978Assignee: Northrop Weaving Machinery LimitedInventors: David Ainsworth, Allan Beckett, Cyril Millward Atkinson
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Patent number: 3998248Abstract: A weft band with carrier for looper looms in which the weft band has a material recess or recesses in the area of the connection of the weft band to the looper.Type: GrantFiled: November 25, 1974Date of Patent: December 21, 1976Assignee: Ruti Machinery Works Ltd.Inventor: Erwin Weidmann