US3780775A - Weft control mechanism for shuttleless looms - Google Patents

Weft control mechanism for shuttleless looms Download PDF

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Publication number
US3780775A
US3780775A US00284499A US3780775DA US3780775A US 3780775 A US3780775 A US 3780775A US 00284499 A US00284499 A US 00284499A US 3780775D A US3780775D A US 3780775DA US 3780775 A US3780775 A US 3780775A
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Prior art keywords
weft
yarn
control mechanism
finger
positions
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Expired - Lifetime
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US00284499A
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English (en)
Inventor
F Sprague
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Draper Corp
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Rockwell International Corp
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Assigned to DRAPER CORPORATION, reassignment DRAPER CORPORATION, CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE APRIL 1,1982 Assignors: DELTA ACQUISITION CORPORATION,
Assigned to DELTA ACQUISTION CORPORATION reassignment DELTA ACQUISTION CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ROCKWELL INTERNATIONAL CORPORATION
Assigned to CITICORP INDUSTRIAL CREDIT INC. reassignment CITICORP INDUSTRIAL CREDIT INC. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DRAPER CORPORATION F/K/A DELTA ACQUISITION CORPORATION
Assigned to STANCHART BUSINESS CREDIT, A CORP. OF CA. reassignment STANCHART BUSINESS CREDIT, A CORP. OF CA. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DRAPER CORPORATION
Assigned to DRAPER CORPORATION, A CORP. OF GEORGIA reassignment DRAPER CORPORATION, A CORP. OF GEORGIA RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: CITICORP INDUSTRIAL CREDIT, INC.
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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 invention relates to shuttleless looms wherein weft yarn is inserted into separate sheds of warp threads in pairs of interconnected picks by means of reciprocating flexible yarn carrying elements.
  • the weft control mechanism of the present invention requires a single weft presenting member or so-called weft positioner which during the performance of its intended function is adapted to present any one of a plurality of weft yarns drawn frorn independent sources of SUMMARY OF THE INVENTION
  • the weft control mechanism according to the invention functions in cooperation with a weft device having a plurality of yarn positioner fingers which are selectively and individually movable between active and inactive positions.
  • Each yarn positioner finger controls a different weft yarn drawn from an independent source and they are so arranged that when selected they move their associated weft yarn to the so-called active position which is common to each of the other weft yarns when they are selectively moved to active position by their respective fingers.
  • the weft positioner comprising the invention is pivotable by known means, between first and second positions which are effective in locating a selected weft yarn so as to form picks of interconnected pairs when it is presented to the means for its insertion into the shed.
  • the upper surface of the weft positioner is provided with an integrally formed hook member which is adapted to receive therein the weft yarn that is selectively moved to active position by its respective weft positioner finger. During the selected movement of one weft yarn to active position, the previously selected weft is withdrawn from the hook member as its respec tive finger is caused to move to its inactive position.
  • FIG. 1 is a perspective view of a portion of ashuttleless loom showing the weft positioner according to the invention applied thereto and located in one of thetwo positions it is caused to assume during the performance of its intended function;
  • FIG. 2 is a perspective view of a portion of the mechanism in FIG. 1 showing the other of the two positions which the filling positioner is caused to assume;
  • FIG. 3 is a view in side elevation of a portion of the weft positioner showing the hook member for receiving a selected weft yarn and moving the same between the two positions necessary to insert lengths of weft in the form of pairs of interconnected picks.
  • FIG. 1 the usual form of weft cutter bracket 10.
  • This cutter bracket attaches in a known manner to and extends rearwardly from a weft control housing that is assembled to the forward and upper front surface of the loom not shown, but which illustrates a portion'of the housings cover at 11.
  • the looms lay beam is shown at 12 and the reed carried thereby is identified by numeral 13.
  • the weft inserting carrier (not shown) is fixed to the free end of a flexible tape 14 and is well known to those conversant with the art is caused to be projected into and withdrawn from the warp shed in timed sequence with the weaving cycle.
  • FIG. 1 Portions of the looms framework are shown in FIG. 1 which includes the right hand loomside l5 and a socalled arch end 16.
  • a weft yarn selector unit generally identified by numeral 17 is mounted on a support bracket 18 that is attached by any suitable means to the arch end 16.
  • Support bracket 18 positions the weft yarn selector unit 17 above and laterally spaced from vertical alignment with the weft cutter bracket 10.
  • the weft selector unit 17 includes a generally fanshaped housing 19 within which a plurality of spring biased yarn positioner fingers 21, 22, 23 and 24 are slidably carried.
  • the upper end of each yarn positioner finger is interconnected with any suitable selective control unit 24 by a linkage element in the form of a Bowd'en Wire 25.
  • the yarn positioner fingers each include a weft guide eyelet 26 on the lower end thereof (one only shown in FIG. 1) through which the weft yarn associated therewith is adapted to pass.
  • the weft yarns are identified by numerals 27, 28, 29, and 30'and being drawn from separate sources (not shown) they are operativley associated with yarn positioner fingers 21, 22, 23 and 24' respectively.
  • the yarn positioner fingers are slidable between an inactive or yarn storage position to an active position or yarn feeding position such as shown by finger 23 in FlG. l.
  • the fingers are held in their yarn storage positions by their Bowden Wire connections to the selective control unit 24 the latter of which functions in accordance with a predetermined weaving pattern.
  • the selective control unit 24 When a particular yarn positioner finger is required in accordance with the weaving pattern, the dictates of the selective control unit releases its hold on that finger and by means of a coil spring it is caused to slide downwardly to its yarn feeding position.
  • each yarn positioner finger 21, 22, 23 and 24' which are operatively associated with each yarn positioner finger 21, 22, 23 and 24', are identified by numerals 31, 32, 33 and 34 respectively.
  • the-control unit 24 is effective in moving the previously selected finger to its yarn storage position.
  • the yarn positioner fingers are arranged in their housing 19 in such a manner that when selected, they move their weft guide eyelet to a position which is common to each of the other guide eyelets when they are in their yarn feeding positions.v
  • the weft cutter bracket is provided with a pair of spaced and integrally formedlug elements 35 (one only shown in FIGS. 1 and 2) with each having an opening (not shown) aligned with the other for supporting a socalled cutter rod 36 for reciprocating movement.
  • This reciprocating movement is produced in a well known maner by a rotating cam (not shown) carried within the aforementioned weft control housing and for a more detailed description of this unit attention is directed to 1.1.8. Pat. No. 3,467,148.
  • a coil spring 37 assembles on the cutter rod 36 intermediate the lug elements 35 and is effective in keeping the forward end (not shown) of said rod in operative engagement with the means for effecting its reciprocating movement.
  • the rearward end of the cutter rod 36 has a substantial L-shaped support block generaliy indicated by numeral 38 assembled thereon by means of a nut 39 and is caused to reciprocate with said rod.
  • This support block 38 includes a foot portion 40 and an upwardly directed leg portion 41.
  • the lower side (not shown) of the foot portion 40 forms a part of the conventional so-called second pick positioner and the leg portion 41 has a horizontally disposed and forwardly directed bar member 42, assembled thereto by means of a nut 43.
  • Lug element 35 shown in FIGS. 1 and 2 has an upwardly directed stud 44 fixed thereto and has pivotably assembled thereon a weft positioner lever which is in the form of a double armed lever generally indicated by numeral 45.
  • This lever 45 has a first arm 46 which is held in contact with the forward end of bar member 42 by means of a spring 47.
  • One end of spring 47 is attached to a pin 48'fixed on the bar member 43 and the opposite end is attached to a pin 49 fixed on the first tion 51 to which a finger element or so-called weft posi tioner 52 is assembled by means of a screw 53.
  • Screw. 53 passes through a slot 54 (FIG. 3) provided in the weft positioner 52 and provides a means for longitudinal adjustment of the latter.
  • the upper surface of the weft positioner has an angularly disposed recess formed therein which defines a hook 55 and as shown in FIGS. 1 and 2 is adapted to receive a selected weft yarn and to move the same between the two positions shown in these figures.
  • the location of the weft positioner 52 in FIG. 1 shows the weft 29 extending to the cutter and binder device and in FIG. 1 it is shown in its second pick position.
  • the weft positioner pivots between the first and second positions it positions the length of weft extending between said weft positioner 52 and the cutter bracket 10 in a location to be acted upon by a weft depressor 56 that is effective in a known manner of pulling the weft yarn downwardly to a position for pick up and insertion into the warp shed by the inserting carrier.
  • the cutter rod 36 is caused to reciprocate to and fro and the bar member 42 movable therewith is effective in pivoting lever 45 so as to continuously move the weft positioner 52 between the two positions illustrated in FIGS. 1 and 2.
  • the selection of any one of a plurality of wefts is timed so that its associated yarn finger will be lowered to yarn feeding position when the weft positioner 52 is in that position shown in FIG. 1.
  • the selective control unit functions in accordance with the dictates of a predetermined pattern and any one yarn positioner finger with its associated weft can be selected for as few or as many picks of weft as may be desired.
  • a weft control mechanism for selectively presenting one of at least two weft yarns each of which is drawn from an independent source of supply which comprises:
  • a weft finger for each source of weft supply an ranged for individual selective movement between inactive and an active position common to each of said fingers;
  • a single weft positioner means including a pivotal lever having a finger element with an integrally formed hook into which a selected weft finger is caused to position its associated weft yarn for mov' ing said weft between first and second positions for forming picks in interconnected pairs; and
  • a depressor means for engaging said weft in said first and second positions and presenting it to the weft carrier for insertion into the shed.
  • weft control mechanism according to claim 1 wherein said weft fingers include integrally formed eyelets through which the weft associated therewith is tions by said pivotal lever.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US00284499A 1972-08-25 1972-08-25 Weft control mechanism for shuttleless looms Expired - Lifetime US3780775A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28449972A 1972-08-25 1972-08-25

Publications (1)

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US3780775A true US3780775A (en) 1973-12-25

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ID=23090432

Family Applications (1)

Application Number Title Priority Date Filing Date
US00284499A Expired - Lifetime US3780775A (en) 1972-08-25 1972-08-25 Weft control mechanism for shuttleless looms

Country Status (13)

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US (1) US3780775A (fi)
JP (1) JPS4962759A (fi)
BE (1) BE803918A (fi)
BR (1) BR7306545D0 (fi)
CA (1) CA978058A (fi)
CH (1) CH558848A (fi)
DE (1) DE2340345A1 (fi)
ES (1) ES418207A1 (fi)
FR (1) FR2197080B1 (fi)
GB (1) GB1383454A (fi)
IN (1) IN139473B (fi)
IT (1) IT990312B (fi)
NL (1) NL7309881A (fi)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4022254A (en) * 1975-08-25 1977-05-10 Rockwell International Corporation Weft yarn control device
EP0461524A1 (en) * 1990-06-11 1991-12-18 NUOVA VAMATEX S.p.A. Weft yarn presenting device for gripper looms
US20110023992A1 (en) * 2008-04-16 2011-02-03 Sho Jinsoo Thread feeding method, warp thread feeding method, thread feeder and weaving method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2604124A (en) * 1949-10-22 1952-07-22 Draper Corp Method of weaving in shuttleless looms
US3092150A (en) * 1959-06-02 1963-06-04 Dewas Raymond Weaving method and loom
US3342220A (en) * 1964-09-02 1967-09-19 Elitex Zavody Textilniho Weft changing apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1489802A (fr) * 1966-06-08 1967-07-28 Perfectionnements aux dispositifs sélecteurs de trame, notamment pour métiers à tisser à fausse navette
US3467148A (en) * 1967-04-24 1969-09-16 Marshall John D Filling control for shuttleless looms and fabric
BE756346A (fr) * 1969-09-20 1971-03-01 Galileo Spa Off Mecanisme d'alimentation de trame a dispositif de presentation du fil de trame, pour metiers sans navette a passe-trame a aiguilles,rubans ou similaires

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2604124A (en) * 1949-10-22 1952-07-22 Draper Corp Method of weaving in shuttleless looms
US3092150A (en) * 1959-06-02 1963-06-04 Dewas Raymond Weaving method and loom
US3342220A (en) * 1964-09-02 1967-09-19 Elitex Zavody Textilniho Weft changing apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4022254A (en) * 1975-08-25 1977-05-10 Rockwell International Corporation Weft yarn control device
EP0461524A1 (en) * 1990-06-11 1991-12-18 NUOVA VAMATEX S.p.A. Weft yarn presenting device for gripper looms
US20110023992A1 (en) * 2008-04-16 2011-02-03 Sho Jinsoo Thread feeding method, warp thread feeding method, thread feeder and weaving method
US8381773B2 (en) * 2008-04-16 2013-02-26 JinSoo Sho Thread feeding method, warp thread feeding method, thread feeder and weaving method

Also Published As

Publication number Publication date
DE2340345A1 (de) 1974-03-14
CA978058A (en) 1975-11-18
BR7306545D0 (pt) 1974-07-25
IT990312B (it) 1975-06-20
FR2197080A1 (fi) 1974-03-22
CH558848A (de) 1975-02-14
FR2197080B1 (fi) 1976-05-07
JPS4962759A (fi) 1974-06-18
IN139473B (fi) 1976-06-26
ES418207A1 (es) 1976-02-16
NL7309881A (fi) 1974-02-27
GB1383454A (en) 1974-02-12
BE803918A (fr) 1973-12-17

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AS Assignment

Owner name: DELTA ACQUISTION CORPORATION; HORNADAY RD., GREENS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ROCKWELL INTERNATIONAL CORPORATION;REEL/FRAME:004113/0020

Effective date: 19820321

Owner name: DRAPER CORPORATION,

Free format text: CHANGE OF NAME;ASSIGNOR:DELTA ACQUISITION CORPORATION,;REEL/FRAME:004097/0735

Effective date: 19820920

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Owner name: CITICORP INDUSTRIAL CREDIT INC., A CORP. OF DE

Free format text: SECURITY INTEREST;ASSIGNOR:DRAPER CORPORATION A CORP. OF GA F/K/A DELTA ACQUISITION CORPORATION;REEL/FRAME:004070/0533

Effective date: 19821021

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Owner name: STANCHART BUSINESS CREDIT, 200 GALLERIA PARKWAY, N

Free format text: SECURITY INTEREST;ASSIGNOR:DRAPER CORPORATION;REEL/FRAME:004539/0198

Effective date: 19860328

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Owner name: DRAPER CORPORATION, GREENSBORO, NORTH CAROLINA A C

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:CITICORP INDUSTRIAL CREDIT, INC.;REEL/FRAME:004664/0583

Effective date: 19860331