US3384126A - Weft thread inserting device in weaving machines - Google Patents

Weft thread inserting device in weaving machines Download PDF

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Publication number
US3384126A
US3384126A US509502A US50950265A US3384126A US 3384126 A US3384126 A US 3384126A US 509502 A US509502 A US 509502A US 50950265 A US50950265 A US 50950265A US 3384126 A US3384126 A US 3384126A
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United States
Prior art keywords
clamping member
weft
thread
weft thread
jaw
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US509502A
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English (en)
Inventor
Golobart Ramon Balaguer
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Individual
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Individual
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Publication of US3384126A publication Critical patent/US3384126A/en
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J5/00—Shuttles
    • 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
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J2700/00—Auxiliary apparatus associated with looms; Weavening combined with other operations; Shuttles
    • D03J2700/10—Shuttles
    • D03J2700/14—Gripper shuttles

Definitions

  • a weaving machine having a hollow rigid member for inserting a weft thread through the shed, with a clamping member for the thread at One end and a controlling mechanism for the clamping member at the other end, the clamping member having a fixed jaw and a movable jaw, at least one of the jaws having a throat for the insertion of the thread to be clamped, the movable jaw being slidably arranged on the fixed jaw and moved, in one direction, by a spring and in the opposite direction by a traction member controlled by said controlling mechanism in timed relationship to the reciprocating movement of the weft thread inserting member.
  • the present invention relates to a device having a clamping member for assuring the insertion of the weft threads in weaving machines.
  • This device comprises, in addition to the mentioned clamping member, a clamping member support arm adapted for passing entirely, with its extreme end through the warp threads of the shed, driven by its normal reciprocating movement which is necessary for weaving, and a set of controlling members adapted to assure the opening and closing of said clamping member at certain moments during the reciprocating movement of the clamping member to grip and release the weft thread for effecting the correct weaving operation.
  • the clamping member being part of the device has a fixed jaw and a movable one and presents essentially the following features:
  • the movable jaw When said clamping member is free of Weft threads, the movable jaw may pass to the closed position of the clamping member without meeting any obstacle in front of the fixed jaw, but when between the jaws of the clamping member a weft thread is inserted, this forms an abutment for the movable jaw with respect to the fixed jaw, so that the clamping member acts as a knife which, however, has not the necessary strength to cut the thread inserted into the clamping member.
  • At least one of the two jaws is provided with a throat into which the weft thread or Weft threads to be gripped by said clamping member are located.
  • Two knives are associated, respectively, with the fixed jaw and the movable one, in such a manner that when one or several threads are gripped between the movable jaw and the fixed jaw of the clamping member, said knives sever this or these weft threads so that only one end of the thread or of each of the gripped threads is retained in the clamping member.
  • clamping members forming part of weft inserting members generally consisting of a shaft or arm adapted to insert the weft threads into the shed.
  • weaving of different industrial fibres causes a more or less speedy wear of the jaws of these clamping members, which is essentially due to the unavoidable friction occurring during gripping and especially during releasing of the weft thread. This wear causes the formation of grooves in the aws.
  • the movable jaw In clamping members with jaws having an even surface approaching respectively the corresponding surface of the other jaw to grip the weft thread or weft threads, the movable jaw finally hits the fixed jaw through the edges of the worn out grooves, even when the clamping member is fed by one single thread to be gripped.
  • the thread normally is located in this groove, but, if this groove is rather deep, said thread cannot be retained by the jaws of the clamping member.
  • the mentioned wear aggravates progressively and as in many cases the weft thread or its consistence are not uniform, the said wear does not cause the abrupt stopping of the weaving operation, but gives rise to defective fabrics.
  • the inconveniences referred to above are practically nil and may endure a rather heavy wear until put out of service, and in this case any part of the very simple clamping member may be replaced easily.
  • a notable advantage of the clamping member of the present invention consists in the above described features and in the possibility to adapt the throat into which the weft threads to be gripped are inserted, so that it can grip several weft threads simultaneously and more easily than by means of clamping members with jaws having an even surface approaching respectively the corresponding surface of the other jaw to grip the weft thread or weft threads.
  • the separation between the said surfaces depends on one or eventually two threads, which flatten less, while the other thread or threads are not correctly gripped.
  • the subject device of the present invention may have all or some of the following original arrangements:
  • the fixed j-aw of the clamping member is solid with the shaft being a part of the device, and the movable jaw, slidably arranged on the fixed jaw, is moved, on the one hand, by a spring which may be arranged inside the clamping member and, on the other hand, by a controlling member, such as a rod or cable.
  • This controlling rod or cable may be arranged along or inside of the shaft and the clamping member support arm.
  • the spring will tend to move the movable jaw in such a way that it closes the clamping member and a traction on the controlling rod or cable compresses said spring thus causing the opening of the clamping member.
  • the strength exerted on the movable jaw by said spring is adjustable by an action on a screw or nut which regulates the tension of the spring when the clamping member is closed.
  • the fixed or the movable jaw of the clamping member, or both, may comprise a hook to facilitate the automatic insertion of the weft thread into the clamping member. Said hook then is covered by a casing of the clamping member when this latter is closed in order to avoid that the warp threads might possibly be caught by said hook during the passage of the clamping member through the shed.
  • the controlling mechanism of said clamping member is fixed at the opposite extreme end of the clamping member support arm which carries the shaft with its corresponding clamping member.
  • This mechanism closes the clamping member when th weft threads are inserted and opens it again when the clamping member has passed through the shed.
  • This mechanism is essentially constituted by a lever and a pawl.
  • the lever is movable around a stationary point with respect to the clamping member support arm and has a trigger groove and a projecting nose adapted to co-operate with a cam fixed on the frame of the loom.
  • the pawl has an appendix upon which may actuate a trigger mechanism also fixed on the frame of the loom.
  • the clamping member support arm is rigid and needs no guidance for its passage through the shed.
  • FIG. 1 is a perspective view, with parts in section, of the clamping member joined to the clamping member support arm;
  • FIG. 2 is an enlarged perspective view, with parts in section, of the jaws of the clamping member
  • FIG. 3 is a perspective view of theclamping member support arm with the controlling device of the clamping member, showing also the elements which produce opening and closing of the clamping member.
  • FIGS. 1 and 2 1 shows the fixed jaw which is solid with a shaft 1 adapted to pass through the shed formed by the warp threads; 2 shows the movable jaw which slides on the fixed jaw 1 and starts from shaft 1'.
  • the weft thread 3 (FIG. 1), tens d in a direction which is normal or inclined to the direction of the displacement of the clamping member, is gripped by the hook 4 of the fixed jaw 1 when the shaft 1' moves back.
  • A, B and C (FIGQZ) show three successive positions which the weft thread occupies with respect to the clamping member.
  • the tension of the spring 7 can be increased or decreased accordingly to adjust the movable jaw 2 for gripping the thread even in case of a very heavy wear of the jaws.
  • the maximum wear at which the clamping member can still work is defined by the position of the rod 9 and of the adjusting slot 10*.
  • the strength exerted by the spring 7 on the movable ja-w 2 in the gripping position must be less than the necessary force for severing the weft thread or weft threads between the two jaws, but sufiicient for avoiding the slipping of the weft thread or Weft threads between the two jaws.
  • a device, for instance with an adjusting screw, may be provided for the regulation of the tension of the spring 7. The closing pressure may then be adapted to the type of weft thread.
  • 1-1 shows the clamping member support arm; 12 shows a hollow screw through which the clamping member support arm 12 is connected with the shaft *1; 13 shows a counter-nut for assuring the connection; '14 shows a casing or cover adapted to assure the continuation between the shaft 1' and the clamping member support arm 11 and to avoid damage of the warp threads during the passage through the shed.
  • 15 shows the hollow screw for connecting the controlling mechanism with the clamping member support arm 11 and the counter-nut 29.
  • Through said hollow screw 15 passes the controlling rod or cable 6, which is connected by the crossbar 34 to the driving lever :16.
  • 17 shows the support and rotating point of the lever 16.
  • 18 shows the projecting nose of the lever 16, which is adapted to co-operate with the cam 19 (FIG. 4) fixed on the frame of the loom (not shown), where the normal movement of the clamping member support arm starts.
  • the cam 19 and the control pawl 23 are adjustably mounted on a unitary rod and are spaced there along a distance slightly greater than the Width of the warp. In so placing the control means, the clamping member is controlled adjacent the weft insertion aside of the shed, by control pawl 23 to close and grip the weft thread to be inserted therein and is controlled on the opposite side of the shed by control cam 19 to release the weft end just drawn into the shed.
  • the control members may be adjusted along their mounting rod by screw means 27 and 2-8, to accommodate warps having a plurality of widths.
  • 32 and 3 3 show two flange members for the connection of the device with the reciprocating driving system (not shown).
  • the two jaws of the clamping member may have different forms from those described, that the movement of the two jaws may be different from the transfer movement, and that the driving mechanism may be arranged at any convenient point of the clamping member support arm.
  • a weft inserting means including a clamping member operable to move a weft thread through a shed, characterized in that the clamping member mounted at one end of said weft inserting means includes a fixed jaw and a movable jaw operable to engage a weft but adapted to remain out of contact with one another, and a control mechanism for said jaws mounted at the other end of said inserting means, said movable jaw being arranged to slide along means forming said fixed jaw, one of said jaws forming a throat which is adapted to receive and position a weft thread to be gripped by said jaws.
  • a weft inserting means as claimed in claim 1 including spring means forcing the movable jaw into clamping position and drive means returning said jaw into non-clamping position against the action of said spring means.
  • a weft inserting means as claimed in claim 2 comprising a screw and nut means adapted to adjust the tension of said spring means.
  • a weft inserting means as claimed in claim 5 including a pawl constantly urged against said lever and engaging a groove of said lever so as to block pivotal movement of the lever and retain the movable jaw in non-clamping position while thus engaged, and means disengaging said pawl when the clamping means moves into weft gripping position.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US509502A 1964-12-09 1965-11-24 Weft thread inserting device in weaving machines Expired - Lifetime US3384126A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES0307145A ES307145A1 (es) 1964-12-09 1964-12-09 Dispositivo con pinza presionadora para la insercion de hilos de trama de maquinas de tejer

Publications (1)

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US3384126A true US3384126A (en) 1968-05-21

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Application Number Title Priority Date Filing Date
US509502A Expired - Lifetime US3384126A (en) 1964-12-09 1965-11-24 Weft thread inserting device in weaving machines

Country Status (4)

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US (1) US3384126A (es)
ES (1) ES307145A1 (es)
FR (1) FR1456409A (es)
GB (1) GB1129807A (es)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3519028A (en) * 1967-08-10 1970-07-07 Ramon Balaguer Golobart Picking elements for filling yarns in looms with fixed weft reserve
US3613740A (en) * 1968-12-03 1971-10-19 Alsacienne Constr Meca Weft-passing device for a shuttleless loom
US3665975A (en) * 1970-01-19 1972-05-30 Dornier Gmbh Lindauer Weft thread inserting mechanism for looms
US3719211A (en) * 1970-06-04 1973-03-06 A Porter Yarn holding device for a picking element of a loom
US3862648A (en) * 1973-06-05 1975-01-28 Vyzk Ustav Bavlnarsky Weft thread clamp and cutter for travelling-wave shedding looms
US3901284A (en) * 1973-01-22 1975-08-26 Saurer Diederichs Sa Weft carrier for a shuttleless loom
US4014083A (en) * 1974-09-18 1977-03-29 Lindauer Dornier Gesellschaft Mbh. Draw-in gripper assembly for drawing-in warp threads
JPS5450655A (en) * 1977-09-30 1979-04-20 Shima Idea Center Co Ltd Fastening yarn inserting method of weft knitting machine
JPS5482466A (en) * 1977-12-12 1979-06-30 Shima Idea Center Co Ltd Lever for passing yarn used in stopping edge of knitted fabric
DE3033201A1 (de) * 1979-09-05 1981-03-19 Maschinenfabrik Rüti AG, Rüti, Zürich Greiferkopf fuer webmaschinen mit entnahme des schussfadens von ortsfesten spulen
US4350184A (en) * 1979-03-29 1982-09-21 Mueller Jakob Shuttleless weaving machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1095254B (it) * 1978-04-07 1985-08-10 Somet Meccanica Tessile S P A Pinza portante per telai di tessitura ad alimentazione continua della trama
IT1132844B (it) * 1980-09-15 1986-07-09 Nuovo Pignone Spa Perfezionamenti nelle pinze passatrama per telai tessili

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2667187A (en) * 1950-06-16 1954-01-26 Nat Res Dev Yarn cutting arrangement in automatic looms
US2837124A (en) * 1953-06-09 1958-06-03 Ancet Victor Marie Joseph Shuttleless weaving loom
US2960117A (en) * 1955-08-05 1960-11-15 Weaving Res & Textile Commissi Weft inserting device for looms

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2667187A (en) * 1950-06-16 1954-01-26 Nat Res Dev Yarn cutting arrangement in automatic looms
US2837124A (en) * 1953-06-09 1958-06-03 Ancet Victor Marie Joseph Shuttleless weaving loom
US2960117A (en) * 1955-08-05 1960-11-15 Weaving Res & Textile Commissi Weft inserting device for looms

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3519028A (en) * 1967-08-10 1970-07-07 Ramon Balaguer Golobart Picking elements for filling yarns in looms with fixed weft reserve
US3613740A (en) * 1968-12-03 1971-10-19 Alsacienne Constr Meca Weft-passing device for a shuttleless loom
US3665975A (en) * 1970-01-19 1972-05-30 Dornier Gmbh Lindauer Weft thread inserting mechanism for looms
US3719211A (en) * 1970-06-04 1973-03-06 A Porter Yarn holding device for a picking element of a loom
US3901284A (en) * 1973-01-22 1975-08-26 Saurer Diederichs Sa Weft carrier for a shuttleless loom
US3862648A (en) * 1973-06-05 1975-01-28 Vyzk Ustav Bavlnarsky Weft thread clamp and cutter for travelling-wave shedding looms
US4014083A (en) * 1974-09-18 1977-03-29 Lindauer Dornier Gesellschaft Mbh. Draw-in gripper assembly for drawing-in warp threads
JPS5450655A (en) * 1977-09-30 1979-04-20 Shima Idea Center Co Ltd Fastening yarn inserting method of weft knitting machine
JPS5482466A (en) * 1977-12-12 1979-06-30 Shima Idea Center Co Ltd Lever for passing yarn used in stopping edge of knitted fabric
US4350184A (en) * 1979-03-29 1982-09-21 Mueller Jakob Shuttleless weaving machine
DE3033201A1 (de) * 1979-09-05 1981-03-19 Maschinenfabrik Rüti AG, Rüti, Zürich Greiferkopf fuer webmaschinen mit entnahme des schussfadens von ortsfesten spulen

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Publication number Publication date
ES307145A1 (es) 1965-04-16
GB1129807A (en) 1968-10-09
FR1456409A (fr) 1966-10-21

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