US3587663A - Thread-passing devices of shuttleless looms - Google Patents

Thread-passing devices of shuttleless looms Download PDF

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Publication number
US3587663A
US3587663A US802119A US3587663DA US3587663A US 3587663 A US3587663 A US 3587663A US 802119 A US802119 A US 802119A US 3587663D A US3587663D A US 3587663DA US 3587663 A US3587663 A US 3587663A
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US
United States
Prior art keywords
thread
clamp
weft
jaws
batten
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Expired - Lifetime
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US802119A
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English (en)
Inventor
Yves Juillard
Bernard Geiger
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Alsacienne de Constructions Mecaniques SA
Original Assignee
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

Definitions

  • the clamp jaws are mounted so that they can move apart tem porarily from one another when the clamp is in the rest position at the end of a return pass of weft-thread-delivery means, with the movement apart of the jaws being controlled and a blower device being provided to blow a stream of air onto the clamp when the weft-thread-delivery means is in its rest position.
  • the present invention relates to thread-passing devices of shuttleless looms, and, more particularly" to such devices which are designed to clean themselves automatically on each pass.
  • the object of the invention is to providev a thread-passing device which does not have the aforesaid drawbacks of known devices.
  • the principle underlying the device according to the invention consists in cleaning the delivery needle-while it is in its rest position, during each cycle, before catching a thread and inserting it into the shed.
  • a weft-thread-passing device for a shuttleless loom comprises a clamp for catchingthe weft thread and having two jawsadapted to catch the thread by clamping action-only, and mounted so as to be able to move apart temporarily from one-another, control means for moving said jaws, apart when said clamp is in the rest position at the end of a return. pass of. weft-thread-delivery means, and a blower device adapted to blow a jet of air on to the clamp when the weft-thread-deliverymeans is in its rest position. Due to this particular conception, the clamp is always clean at the moment of catching the weft thread, so that the risks of failure are reduced to a minimum.
  • the blower device is carried by the batten and comprises a spring-loaded control unit with alternating movement and adapted to strike at the end'of each return stroke of the batten, against a fixed stop mounted on the frame of the loomLThere is thus effected a violent projection of air on the clamp while both its jaws are open, bringing about certain clearance of any waste which may have lodged in between the jaws;
  • the clamp comprises a fixed jaw integral with the weft-thread-delivery means, and a movable jaw which'is articulatedon the fixed jaw and which has an extension adapted to be pushed back by a fixed cam on the batten to a position such that it opens the clamp and keeps it open when the weft-thread delivery means is at the end of its return pass-and in the rest position.
  • FIG. I shows an elevation of a supply clamp for the weft thread in its maximum return position on a weft-shooting weaving frame or loom of the type described in U.S. Pat. No. 3,159,l86:
  • FIG. 2 is a corresponding plan view
  • FIG. 3 is a partial section along line III III of FIG. 1.
  • FIG. 1 is a partial view of the upper partof a batten 3, reel 4, a bobbin or' pin 5 continuously supplying weft thread, two thread-guides 6, 7 and a weft-cutting and -holding device indicated as a unit at 9, and described in detail in'U.S. Pat. No. 3,l57,208.
  • the clamp 1 comprises a fixed jaw 12 integral with needle 2, and a movable jaw 14 which can move away from and towards the fixed jaw I2, such as for example by pivoting around a vertical axis 15, as shown.
  • the axis 15 is constituted by a stationary screw, and the movable jaw 14 is urged against the fixed jaw 12 by a small spiral compression spring 17 located in a hole 18 in the needle 2, with one end of the spring being supported against an extension I9 of the movable jaw 14, and its other end resting against a plug 21 screwed into the outer end of the hole 18.
  • the spring 17 is strong enough to prevent the jaws I4 and I2 from moving apart under the pressure of the thread which is clamped therebetween because of the effect of their appropriate configurations on the occasions-of thread passage.
  • the thread is caught by the clamp only because of its being clamped between the two jaws; the latter may, for example, by provided with corrugations such as those shown at 23 and 24 in FIG. 3, of conjugate profile.
  • the movable jaw 14 When the needle 2 is in its fully withdrawn position, i.e. in its rest position while the batten itself isat its rear dead point, the movable jaw 14 is kept away from the fixed jaw 12 by a cam 27 which is fixed on the batten 3, such as by means of screws 28, and-which'keep back a heel 29 of an extension of the movable jaw 14.
  • this device is made up of a cylinder 32 which isfix'ed-on the upper side of the batten 3 by means of screws 3 3 orthe like, and in'wh'ich is displaceable a piston 35 equipped with a leather cup-washer 36, v
  • a spiral compressionspring 41 interposed between the base of the cylinder 32 andthe piston 35, tends to push back the piston constantly, and drive of the piston is effected by the fact that a head 42 at the end of a piston stem 37 strikes against a fixed part 43 of the frame of the machine when'the batten reaches-its-maximum retracted position, i.e. that shown-in the drawings.
  • the part of the cylinder 32 near the base of the cylinder, is fitted with .an air-projecting pipe45"opening just in front of the clamp l when the latter is in its restposition as shown.
  • the cam 27 has the sole function of opening and keeping open the clamp 1 when the latter is in its maximum retracted position, but, when the clamp sets off for the introduction of a new weft, its heel 29 moves away from the cam 27, and in consequence, the clamp closes again before catching, by a clamping action only, the weft thread 5 presented thereto on its passage.
  • an air-projecting device which is completely different in structure, such as for example a simple nozzle connected to a source of compressed air under the control of an electroblast gate controlled synchronously with the return pass of the batten.
  • a weft-thread-passing device for a shuttleless loom comprising a clamp for catching the weft thread, said clamp having two jaws adapted to catch the thread by clamping action only, said jaws being mounted so as to be able to move apart temporarily from one another, means for moving said jaws apart when said clamp is in the rest position at the-end of a return pass of weft-thread-delivery means,v and a blower device adapted to blow a jet of air onto the clamp when the weftthread-delivery means is in its rest position to remove any particles of material remaining between the jaws and capable of preventing the jaws from contacting each other.
  • the weft-thread-passing device including a reciprocating batten, a frame, the blower device being mounted on the batten and comprising a spring-loaded control unit with alternating movement, and adapted to strike at the end of each return pass of the batten, against a fixed stop mounted on the frame.
  • the weft-thread-passing device including a reciprocating batten, the clamp comprising a fixed jaw integral with the weft-thread-delivery means and a movable jaw articulated on the fixed jaw, said movable jaw having an extension adapted to be pushed back by a fixed cam on the batten'to a position such that it opens the clamp and keeps it open when the weft-thread-delivery means is at the end of its return pass and in the rest position.
  • a shuttleless loom having a rearwardly and forwardly reciprocating batten, shed-defining means, a pair of elongated carriers reciprocable in opposite directions transversely of the shed, and insert and pickup clamps attached respectively to the inner ends of the carrier and cooperable for passing the free end of a weft thread presented to the pickup clamp incident to moving the thread successively by the insert and pickup clamps through the shed during rearward movement of the batten, said insert clamp including a pair of jaws, one of said jaws being movable relative to the other jaw, and resilient means maintaining the jaws in resilient contact with each other, means positioned on the batten o erative to se arate said aws against the action of the resllien means when e insert clamp reaches the end of its rearward movement, and batten control means for producing a blast of pressure air and directing such blast between the separated jaws of the insert clamp to remove any particles of material remaining between the jaws and capable of preventing the jaws from contacting each other.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
US802119A 1968-02-27 1969-02-25 Thread-passing devices of shuttleless looms Expired - Lifetime US3587663A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR141353 1968-02-27

Publications (1)

Publication Number Publication Date
US3587663A true US3587663A (en) 1971-06-28

Family

ID=8646568

Family Applications (1)

Application Number Title Priority Date Filing Date
US802119A Expired - Lifetime US3587663A (en) 1968-02-27 1969-02-25 Thread-passing devices of shuttleless looms

Country Status (8)

Country Link
US (1) US3587663A (it)
BE (1) BE728964A (it)
CH (1) CH490544A (it)
DE (1) DE1909640C3 (it)
ES (1) ES364581A1 (it)
FR (1) FR1563122A (it)
GB (1) GB1213102A (it)
NL (1) NL154563B (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4129155A (en) * 1975-10-03 1978-12-12 Somet Societa' Meccanica Tessile S.P.A. Weft carrying gripper for shuttleless looms with stationary weft supply

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52128775U (it) * 1976-03-29 1977-09-30
CH624438A5 (it) * 1977-11-07 1981-07-31 Sulzer Ag
DE4120568A1 (de) * 1991-03-08 1992-09-10 Textilma Ag Greiferwebmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4129155A (en) * 1975-10-03 1978-12-12 Somet Societa' Meccanica Tessile S.P.A. Weft carrying gripper for shuttleless looms with stationary weft supply

Also Published As

Publication number Publication date
FR1563122A (it) 1969-04-11
CH490544A (fr) 1970-05-15
DE1909640B2 (de) 1973-03-29
BE728964A (it) 1969-08-26
DE1909640C3 (de) 1973-10-25
GB1213102A (en) 1970-11-18
NL6902976A (it) 1969-08-29
NL154563B (nl) 1977-09-15
DE1909640A1 (de) 1969-09-25
ES364581A1 (es) 1971-02-01

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