US3613740A - Weft-passing device for a shuttleless loom - Google Patents

Weft-passing device for a shuttleless loom Download PDF

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Publication number
US3613740A
US3613740A US881118A US3613740DA US3613740A US 3613740 A US3613740 A US 3613740A US 881118 A US881118 A US 881118A US 3613740D A US3613740D A US 3613740DA US 3613740 A US3613740 A US 3613740A
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United States
Prior art keywords
movable jaw
needle
jaw
weft
extension
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Expired - Lifetime
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US881118A
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English (en)
Inventor
Bernard Geiger
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Alsacienne de Constructions Mecaniques SA
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Alsacienne de Constructions Mecaniques SA
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Application filed by Alsacienne de Constructions Mecaniques SA filed Critical Alsacienne de Constructions Mecaniques SA
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/20—Constructional features of the thread-engaging device on the inserters
    • D03D47/23—Thread grippers
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms

Definitions

  • a weft-transfer device for a shuttleless loom comprises a needle having at one end a grab with a fixed jaw and a pivotal jaw spring-urged t0 the closed position, a springloaded sliding catch for engaging a tail on the pivotal jaw and holding the latter open, a cam formation on said tail for engaging an abutment to effect engagement of the catch and tail, upon movement of the needle in one direction and near the end of its passage out of the shed, a projection connected to the sliding catch, and a stop which is engaged by said projection to release the catch when the needle moves in the other direction to its position for catching a weft thread.
  • This invention relates to weft-transfer devices for shuttleless weaving looms, and especially, but not exclusively, exit wefttransfer devices designed to take up, in the middle of the shed, the weft threads passed to them by a feeder weft-transfer device.
  • the invention relates to such a device of the type comprising a needle terminating in a grab having a fixed jaw and a movable jaw urged towards the fixed jaw by elastic return means, means for retaining the mobile jaw in the open position, means for neutralizing the said retaining means when the needle reaches a position for taking up a weft thread, and means for controlling the opening of the movable jaw when the needle is near the end of its passage out of the shed.
  • Known weft-transfer devices of this type have a disadvantage in that they comprise a large number of moving parts which react on one another so that their functioning is not as precise as is desirable in looms which are being made to operate faster and faster in order to comply with the evolution of a technology whose aim is continuously to increase performance and production.
  • such known devices have a further disadvantage, by virtue of their particular struc-' ture, in that they seem to have a certain sensitivity to accelerations, whether longitudinal or transverse, with the result that, from a certain speed of operation onwards, untimely occurrence of the opening or closing of the pincers tends to arise.
  • An object of the present invention is to provide a wefttransfer device of the type aforesaid, in which the above-mentioned drawbacks are obviated or mitigated.
  • a wefttransfer device for a shuttleless weaving loom comprising a needle terminating in a grab having a fixed jaw and a movable jaw urged by resilient return means towards the fixed jaw, means for retaining the movable jaw in an open condition, means for neutralizing the said retaining means when the needle reaches a position for catching a weft thread, and means for controlling the opening of the movable jaw when the needle is near the end of its passage out of the shed, in which the movable jaw is pivotable on the fixed jaw about a transverse axis, and has an extension beyond said axis, the means for retaining the movable jaw in the open condition comprises a slide movable longitudinally in the needle and resiliently urged against said extension of the movable jaw, said means for neutralizing said retaining means comprises a projection on a bolt which is movable longitudinally of the needle and is secured to said slide, and a stop in the path of said projection, the means for controlling the opening of the movable
  • the device thus, has only a small number of parts and, apart from its low cost, it is robust and reliable in operation, the more so in that it is substantially insensitive to accelerations, since the movable jaw is mounted on the fixed jaw, and is balanced by the presence of its said extension, and, in addition, the slide and its control bolt can be very light in weight, thus present only a negligible inertia relative to the strength of their return spring.
  • the locking of the grab in the open position and the clamping of the thread in the closed position easily resist forces clearly stronger than those which may arise as a result of the strongest acceleration occurring.
  • the slide and its control bolt can be very light in weight
  • opening of the grab is controlled by a stationary abutment against which the extension of the movable jaw bears directly, i.e., under the best circumstances for security and precise operation.
  • FIG. 1 is a plan view, with certain parts removed, of a wefttransfer device according to the present invention in the posi tion for drawing a weft thread;
  • FIG. 2 is a view corresponding to F I6. I showing the device towards the end of its exit passage;
  • FIG. 3 is a view corresponding to FIG. 1 showing the device with the needle near the end of its passage, where it is to catch a weft thread.
  • a weft-transfer device for a shuttleless weaving loom consists of a needle indicated generally by l, and a system indicated generally by 2 controlling the opening and closing of a grab.
  • the needle 1 reciprocates along reed 3 of the loom, and to this end, is fitted with a skid 4 adapted to run along the front face of said reed.
  • the needle 1 is actuated by means of a balland-socket joint 5 at its outer end through an appropriate system which does not form part of the present invention, and a detailed description of which can be found in the abovementioned French Patent.
  • the needle 1 carries a grab indicated generally by 8 and consisting of a fixed jaw 11 integral with the skid 4, and a movable jaw 12 pivotally mounted on the fixed jaw 11 by means of pivot pin 13.
  • the grab 8 is resiliently urged towards its closed position, i.e., for clamping a weft thread 10, by a compression spring 16 of which one end presses against the inner face of a tail 17 on the movable jaw 12, and the other end presses against a regulating screw 18 located in the skid 4.
  • the grab 8 can be maintained in the open condition, as shown in FIG. 2, by retaining means consisting in this example of a slide 21 which has a recess 22 and which is mounted in a sliding fashion in the tubular body 6 of the needle 1.
  • the slide 21 is resiliently urged towards the tail 17 of the jaw 12 of the grab by a compression spring 23 which is located in the tubular body 6 of the needle 1, an of which one end presses against the face of the slide 21 opposite to the face with the recess 22, while its other end presses against an internal collar 25 in the needle 1.
  • the slide 21 can release the tail 17 of the jaw 12 under the action of neutralizing means which consist of a stop 28 belonging to the system for controlling opening and reengaging the grab and indicated by 2, the stop 28 being located in the path of an angled end portion 29 of a bolt 27 which is slidable in a bore 31 in a collar 25, and in a bore 32 in another similar collar 33, both being fixed in the tubular body of the needle I, the other end of bolt 27 being fixed to the slide 21.
  • neutralizing means consist of a stop 28 belonging to the system for controlling opening and reengaging the grab and indicated by 2, the stop 28 being located in the path of an angled end portion 29 of a bolt 27 which is slidable in a bore 31 in a collar 25, and in a bore 32 in another similar collar 33, both being fixed in the tubular body of the needle I, the other end of bolt 27 being fixed to the slide 21.
  • the stop 28 is fixed to a bracket 35 on the loom frame, at a point so placed that, when the said stop 28 is struck by the angled end portion 29 of the bolt 27, the grab is almost at the point at which it is to catch a weft thread, which in this example is passed to it in the middle of the shed by a supply needle.
  • a diagrammatic illustration is given of a fine adjustment means for positioning the stop 28, in the form of a rod 37 which is integral with said stop 28, and is fitted in a bore 38 in a boss 35, in which it can be secured by a setscrew 39.
  • the means controlling the opening of the grab 8 consists of a cam formation 42 formed by an enlargement projecting from the external face of the tail 17 of the jaw 12, and by a roller 43 which forms part of the system indicated generally by 2, and which lies in the path of said cam 42.
  • the roller 43 is mounted on one end of a lever 45 which can pivot on a pin 46 carried by the support 35.
  • a stop 47 limits the length of the pivotal movement of the lever 45 in the direction from the interior of the shed towards the outside, so that roller 43 obstructs the path of the cam 42 of the grab 8 when the needle 1 is moving to the left in the drawing, but the pivoting movement of the lever 45 in the direction of arrow f is free, so that the roller 43 can move clear of the cam 42 when the latter strikes it from left to right in the drawings, i.e., in the entry direction of the needle into the shed.
  • the parts of the jaws ll, 12 of the grab 8 adapted to catch and draw the weft thread 10, and indicated respectively by 51 and 52, are chromed or covered for example, by a high-adhesion material, such as that known in the trade by the name Vulcolan," or by ceramic plates, or by carbide when abrasive threads such as Verranne or natural silk threads, are to be caught.
  • the weft-transfer device functions as follows.
  • the stop 47 on the left-hand side of the lever 45, retains the roller 42 in the position shown in the drawings, in which it depresses the cam 42 of the grab 8 at the end of the latters exit passage; the weft thread is thus released exactly at the moment when the needle reaches its forward dead point, i.e., at the moment of beating-up of the weft.
  • a means of cleaning the grab 8 by a jet of air can be advantageously provided, using the blower device described in our French Pat. No. 1,563,122, so that the grab 8 is always quite clean at the moment of catching a weft thread.
  • a weft-thread passing device for a shuttleless weaving loom comprising a weft-thread pickup needle provided with a clamp having a fixed jaw and a movable jaw urged by resilient return means towards the fixed jaw, means for retaining the movable jaw in an open condition, means for neutralizing the said retaining condition, means for neutralizing the said retaining means when the needle reaches a position for catching a weft thread, and means for controlling the opening of the movable jaw when the needle is near the end of its passage out of the shed, in which the movable jaw is pivotable on the fixed jaw about a transverse axis, and has an extension beyond said axis, the means for retaining the movable jaw in the open condition comprises a slide movable longitudinally in the needle and resiliently urged against said extension of the movable jaw, the means for controlling the opening of the movable jaw comprises a stationary abutment located in the path of said extension of the movable jaw.
  • said means for neutralizing said retaining means comprises a projection on a rod which is movable longitudinally of the needle and is secured to said slide, and a stop in the path of said projection.
  • a weft-thread passing device for a shuttleless weaving loom comprising a weft-thread pickup needle provided with a clamp having a fixed jaw and a movable jaw urged by resilient return means towards the fixed jaw, means for retaining the movable jaw in an open condition, means for neutralizing the said retaining means when the needle reaches a position for catching a weft thread, and means for controlling the opening of the movable jaw when the needle is near the end of its passage out of the shed, in which the movable jaw is pivotable on the fixed jaw about a transverse axis, and has an extension beyond said axis, the means for retaining the movable jaw in the open condition comprises a slide movable longitudinally in the needle and resiliently urged against said extension of the movable jaw, said means for neutralizing said retaining means comprises a projection on a bolt which is movable longitudinally of the needle and is secured to said slide, and a stop in the path of said projection, the means for controlling the opening of the mov

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US881118A 1968-12-03 1969-12-01 Weft-passing device for a shuttleless loom Expired - Lifetime US3613740A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR176354 1968-12-03

Publications (1)

Publication Number Publication Date
US3613740A true US3613740A (en) 1971-10-19

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US881118A Expired - Lifetime US3613740A (en) 1968-12-03 1969-12-01 Weft-passing device for a shuttleless loom

Country Status (9)

Country Link
US (1) US3613740A (fr)
BE (1) BE742522A (fr)
CH (1) CH501078A (fr)
DE (1) DE1961689B2 (fr)
ES (1) ES374159A1 (fr)
FR (1) FR1598258A (fr)
GB (1) GB1270598A (fr)
NL (1) NL151752B (fr)
SU (1) SU386523A3 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4899451A (fr) * 1972-04-04 1973-12-15
US3901284A (en) * 1973-01-22 1975-08-26 Saurer Diederichs Sa Weft carrier for a shuttleless loom
US3927699A (en) * 1974-10-29 1975-12-23 Rockwell International Corp Weft carrier control apparatus
US3931837A (en) * 1975-03-05 1976-01-13 Rockwell International Corporation Carrier for shuttleless loom
US4357964A (en) * 1979-09-05 1982-11-09 Ruti Machinery Works Ltd. Threaded light metal gripper with reinforcement rib
US4915138A (en) * 1987-08-27 1990-04-10 N.V. Michel Van De Wiele Increased picking frequency of pile wire looms
US4922970A (en) * 1988-07-25 1990-05-08 Lindauer Dornier Gesellschaft Mbh Weft thread inserting gripper having a guide element for a shuttleless loom
US6065506A (en) * 1997-07-29 2000-05-23 Gividi-Italia S.P.A. Rapier loom thread gripper with elastic tongue
US6105626A (en) * 1998-07-09 2000-08-22 N. V. Michel Van De Wiele Gripper rapier wedge gap arrangement
WO2002077342A1 (fr) * 2001-03-21 2002-10-03 Picanol N.V. Pince de prehension pour metier a tisser a pince
US20030217781A1 (en) * 2002-05-21 2003-11-27 Koen Bruynoghe Gripper for an axminster gripper weaving machine

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1460145A (en) * 1973-01-24 1976-12-31 Mackie Sons Ltd Looms
US3851677A (en) * 1973-08-13 1974-12-03 Alfa Laval Bergedorfer Eisen Shuttle loom
FR2606040B1 (fr) * 1986-10-31 1988-12-02 Materiel Textile Ste Alsacienn Dispositif pour l'insertion des fils de trame sur les metiers a tisser sans navette
BE1010195A3 (nl) * 1996-04-19 1998-02-03 Picanol Nv Inrichting en werkwijze voor het openen van een grijperklem.
EP0904437A1 (fr) * 1996-04-19 1999-03-31 Picanol N.V. Dispositif pour ouvrir une pince de rapiere d'un metier mecanique
DE10247375A1 (de) * 2002-10-10 2004-05-06 Lindauer Dornier Gmbh Verfahren zur gesteuerten Öffnungsbewegung der Fadenklemme eines Schussfadengreifers in Webmaschinen und Schussfadengreifer
DE10252053A1 (de) * 2002-11-08 2004-06-09 Lindauer Dornier Gmbh Verfahren zum Steuern von Komponenten eines Arbeitsmittels in Webmaschinen und Webmaschine zur Verfahrensdurchführung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2960117A (en) * 1955-08-05 1960-11-15 Weaving Res & Textile Commissi Weft inserting device for looms
FR1391346A (fr) * 1964-04-20 1965-03-05 Fonderie Officine Di Gorizia S Aiguille de tirage de la trame dans les métiers à tissage sans navette
US3384126A (en) * 1964-12-09 1968-05-21 Golobart Ramon Balaguer Weft thread inserting device in weaving machines
US3386477A (en) * 1965-03-27 1968-06-04 Durand Marcel Hydraulic drive means for the weft inserting means in needle loom

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2960117A (en) * 1955-08-05 1960-11-15 Weaving Res & Textile Commissi Weft inserting device for looms
FR1391346A (fr) * 1964-04-20 1965-03-05 Fonderie Officine Di Gorizia S Aiguille de tirage de la trame dans les métiers à tissage sans navette
US3384126A (en) * 1964-12-09 1968-05-21 Golobart Ramon Balaguer Weft thread inserting device in weaving machines
US3386477A (en) * 1965-03-27 1968-06-04 Durand Marcel Hydraulic drive means for the weft inserting means in needle loom

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4899451A (fr) * 1972-04-04 1973-12-15
US3901284A (en) * 1973-01-22 1975-08-26 Saurer Diederichs Sa Weft carrier for a shuttleless loom
US3927699A (en) * 1974-10-29 1975-12-23 Rockwell International Corp Weft carrier control apparatus
US3931837A (en) * 1975-03-05 1976-01-13 Rockwell International Corporation Carrier for shuttleless loom
US4357964A (en) * 1979-09-05 1982-11-09 Ruti Machinery Works Ltd. Threaded light metal gripper with reinforcement rib
US4915138A (en) * 1987-08-27 1990-04-10 N.V. Michel Van De Wiele Increased picking frequency of pile wire looms
US4922970A (en) * 1988-07-25 1990-05-08 Lindauer Dornier Gesellschaft Mbh Weft thread inserting gripper having a guide element for a shuttleless loom
US6065506A (en) * 1997-07-29 2000-05-23 Gividi-Italia S.P.A. Rapier loom thread gripper with elastic tongue
US6105626A (en) * 1998-07-09 2000-08-22 N. V. Michel Van De Wiele Gripper rapier wedge gap arrangement
WO2002077342A1 (fr) * 2001-03-21 2002-10-03 Picanol N.V. Pince de prehension pour metier a tisser a pince
US20040089366A1 (en) * 2001-03-21 2004-05-13 Denis Moeneclaey Receiving gripper for a rapier loom
US7114530B2 (en) * 2001-03-21 2006-10-03 Picanol N.V. Receiving gripper for a rapier loom
US20030217781A1 (en) * 2002-05-21 2003-11-27 Koen Bruynoghe Gripper for an axminster gripper weaving machine
US7077169B2 (en) * 2002-05-21 2006-07-18 N.V. Michel Van De Wiele Gripper for an Axminster gripper weaving machine

Also Published As

Publication number Publication date
CH501078A (fr) 1970-12-31
DE1961689A1 (de) 1970-06-18
NL6918112A (fr) 1970-06-05
SU386523A3 (fr) 1973-06-14
NL151752B (nl) 1976-12-15
ES374159A1 (es) 1972-02-16
DE1961689C3 (fr) 1973-10-18
FR1598258A (fr) 1970-07-06
DE1961689B2 (de) 1973-03-29
GB1270598A (en) 1972-04-12
BE742522A (fr) 1970-06-02

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