US3927699A - Weft carrier control apparatus - Google Patents

Weft carrier control apparatus Download PDF

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Publication number
US3927699A
US3927699A US518651A US51865174A US3927699A US 3927699 A US3927699 A US 3927699A US 518651 A US518651 A US 518651A US 51865174 A US51865174 A US 51865174A US 3927699 A US3927699 A US 3927699A
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US
United States
Prior art keywords
carrier
weft
gripper finger
shed
camming means
Prior art date
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
Application number
US518651A
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English (en)
Inventor
Richard Louis Volpe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Draper Corp
Original Assignee
Rockwell International Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rockwell International Corp filed Critical Rockwell International Corp
Priority to US518651A priority Critical patent/US3927699A/en
Priority to CA233,513A priority patent/CA1025327A/en
Priority to IT51087/75A priority patent/IT1041540B/it
Priority to DE19752540265 priority patent/DE2540265A1/de
Priority to FR7530962A priority patent/FR2289650A1/fr
Priority to JP50124240A priority patent/JPS5164065A/ja
Priority to CH1391275A priority patent/CH595488A5/xx
Priority to ES442185A priority patent/ES442185A1/es
Application granted granted Critical
Publication of US3927699A publication Critical patent/US3927699A/en
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.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • D03D47/236—Drawing grippers

Definitions

  • the invention relates to shuttleless looms of the gripper or single pick insertion type in which weft yarn drawn from a stationary source is inserted as individual picks into separate sheds of warp threads.
  • the invention pertains to a control device effective upon the weft extending carrier for controlling actualion of the carrier's gripper finger which is adapted to grip the weft as it is extended through the shed to complete a single pick.
  • each pick of weft is inserted by two reciprocating carrier members disposed in opposed relation and which are fixed on the free ends of flexible tapes that are caused to be wrapped about and extended from oscillating wheel members at each side of the loom.
  • One of these carriers is commonly referred to as the inserting carrier and the other as the weft receiving or extending carrier.
  • weft yarn remains threaded through an eyelet in the rear wall of the inserting carrier and extends in one direction to its source of supply and in the other direction to the selvage or fabric edge.
  • the weft yarn To form single picks the weft yarn must be clamped, held, then cut adjacent the shed after the inserting carrier is withdrawn from the latter.
  • the weft yarn In preparation for the following pick, the weft yarn is positioned in such a manner as to be caught by a clamping element in the forward wall of the inserting carrier prior to the latters entrance into the shed. The clamped yarn is then released and that portion extending between the front and rear walls of the inserting carrier is properly positioned for positive transfer to the extending carrier.
  • the extending carrier grips the weft adjacent its cut end by means of a gripping finger pivotably mounted intermediate its ends within said carrier.
  • This gripping finger extends within the carrier for a substantial portion of the longitudinal length of the latter and includes a biasing means for continually urging the leading end thereof into a groove of conforming configuration formed in the hooked leading end of the carrier.
  • This biasing means is in the form of a coil spring one end of which seats against an inner rear vertical wall of the carrier and the opposite end is caused to bear against the finger immediately adjacent to its trailing end.
  • This trailing end is in the form of an integral and laterally extending lip which is continually urged forwardly by the coil spring causing a portion thereof to protrude beyond the'forward side of the carrier.
  • the protruding lip on the carrier is caused to contact a fixed member that depresses the lip inwardly causing at the same time the release of the gripped end of weft by pivoting the leading end of the finger out of the groove in the carriers hooked leading end.
  • the weft carrier control apparatus provides a means which alleviates the above condition substantially by causing the carriers gripper finger to be actuated only once during each picking cycle rather than twice as is prevalent with known devices of the prior art.
  • the improved control apparatus for controlling actuation of the gripper finger of a weft extending carrier includes a cam member mounted adjacent to the edge of the fabric and disposed so as to engage the forwardly extending lip of the carriers gripper finger during withdrawal of the carrier from the shed. The gripper finger at this time is pivoted and releases the weft yarn it was drawing through the shed.
  • the cam member is spring biased in a downwardly direction as well as in a lateral direction which continually urges its camrning surface to that position to be engaged by the lip of the gripper finger.
  • the leading end portion of the forwardly extending lip of the gripper finger is wedge shaped and defines a plow type camming surface which as the carrier is caused to move toward the shed it engages the outer end of the cam member and lifts the latter so that the upper surface of the lip moves along the lower surface of said cam member as the carrier moves toward and into the shed. Actuation of the gripper finger during movement of the carrier toward the shed is thus prevented and substantially increases operating life of the gripper finger's biasing means.
  • a further object is to extend the life expectancy of gripper type wefi extending carriers by providing means to substantially reduce, relative to carriers of the prior art, the frequency of actuation of the carriers gripping finger during each picking cycle.
  • FIG. 1 is a perspective view of a portion of a gripper type shuttleless loom showing the weft carrier control apparatus according to the invention applied thereto;
  • FIG. 2 is a plan view of the weft carrier in FIG. 1 showing the cam member for actuating the gripper finger to release the weft held thereby;
  • FIG. 3 is a view in end elevation of the apparatus in FIG. 1 as seen looking from the left-hand side thereof;
  • FIG. 4 is a view similar to FIG. 3 but showing the carrier withdrawn from the shed a distance sufficient for the cam member to actuate said carriers gripper finger;
  • FIG. 7 is a plan view of carrier in FIG. 6 showing the biasing means for laterally urging the cam member toward the carrier.
  • the weft extending carrier is indicated generally by numeral 10 and is fixed to the end of a flexible tape 11 which in a known manner is caused to be wrapped about and extended from a tape wheel disposed at the side of the loom not shown.
  • reed 12 is carried on a reciprocating lay beam 13 (FIG. 3) that is provided with a raceway 14 for guiding the flexible tape 11 and its carrier 10 during the performance of their intended function all of which is well known to those conversant in the weaving art.
  • the carrier 10 is of the conventional elongated configuration having upper and lower surfaces 15 and 16 respectively that are disposed in spaced and aligned relation and which join at the leading end of the carrier to form a weft engaging hook 17.
  • the upper surface 15 tapers downwardly as shown at 18 in FIG. 6 where it joins with the lower surface 16 and forms a means for deflecting the warp yarns during withdrawal of the carrier from the shed.
  • a web or rear wall 19 extends forwardly from the carriers trailing end for a portion of the length of the latter.
  • the carrier is provided with a gripper finger generally indicated by numeral 20 pivotably assembled intermediate at ends therein by means of a pin 21.
  • This gripper finger 20 extends for substantially the full length of the space provided between the surfaces 15 and 16 and is provided at its trailing end with an off-set lip generally identified by numeral 22 and disposed so as to protrude from the forward side of the carrier 10.
  • a biasing means in the form of a coil spring 23 (FIGS. 2 and 7) is located within the space provided between surfaces 15 and 16 and is disposed so that one end thereof seats against the rear wall 19 and the other end against the inner or rearward side of the off-set lip 22.
  • This coil spring 23 is assembled under tension and serves to continually urge the off-set lip forwardly which in turn urges the leading end 24 of the gripper finger (FIGS. 2 and 7) rearwardly and into a groove 25 of conforming configuration formed in the hook 17 where it is effective in gripping a pick of wefi 26 while drawing the same through the shed.
  • the forward vertical side of the off-set lip 22 has a portion of said side which is directed at an angle oblique to the remainder thereof and provides a first cam engaging surface 27 which serves to effect actuation of the gripper finger 20 and release of the weft as the carrier is being withdrawn from the shed.
  • This offset lip 22 also includes at its leading end an extension of its upper horizontal surface which tapers angularly downward to meet the lower surface thereof and defines a second camming surface or a plow type cam 28.
  • Cam 28 is effective on the weft carrier control apparatus, now to be described to prevent actuation of the gripper finger when the carrier is caused to move toward the shed.
  • the weft carrier control apparatus is identified generally in FIGS. 1, 3, 4 and 5 by numeral 29 and as shown in FIG. 3 includes a support bracket 30 which attaches to the lay beam 13 by means of cap screws 31.
  • a locating bracket 32 is assembled to the support bracket 30 by means of bolts 33 and includes horizontally disposed slots 34 and 35 through which said bolts 33 extend to provide means for controlling the distance between the shed and the control apparatus 29.
  • the support bracket 30 also includes slots 36 and 37 that are vertically disposed through which bolts 33 extend and provides a means for vertical adjustment of the control apparatus 29 (FIG. 1).
  • a cam retaining member generally indicated by numeral 38 having a lower planar surface 39 assembles on the top of the locating bracket 32 by means of cap screws 40 and 41. These cap screws extend through slots 42 and 43 respectively in said planar surface and are tightened into aligned tapped holes provided in the locating bracket 32.
  • a cam member 44 is yieldably attached to the planar surface 39 by means of a pair of spaced and upwardly directed bolt members 45 and 46 the heads of which are seated in appropriate apertures provided in the lower planar surface 39 (FIG. 4). Extending in an upwardly direction the shank portions of bolts 45 and 46 pass through and beyond slots 47 (one only shown in FIG. 4) with their upper ends having a biasing means assembled thereon for continually urging cam member 44 to that position shown in FIGS. 1, 3 and 4.
  • This biasing means includes coil springs 48 and 49 ⁇ (FIG. 1) which are assembled under tension on their respective bolts 45 and 46 by means of washers 50 and 51 and nuts 52 and 53 respectively.
  • a further biasing means continually urges the cam member 44 in the direction of the indicating arrow 54 in FIG. 2 and includes a pair of spaced spring wires 55 and 56 with one end of each being anchored in a centrally disposed and upwardly directed lug 57 which forms an integral part of the forward side of the planar surface 39.
  • These spring wires 55 and 56 are assembled in the lug 57 by means of set screws 58 (FIG. I) and extending from said lug the free ends of the spring wires are formed so as to bear against the forward side of the cam member 44.
  • FIGS. 1 and 2 which shows the carrier moving in the direction of the indicating arrows 63 and 64 respectively, the cam engaging surface 27 of the off-set lip 22 is first caused to contact a tapered leading end 65 of the cam member 44 as the carrier is being withdrawn from the shed. Further movement of the carrier in this direction (FIG. 2) brings the off-set lip into contact with a rear camming surface 66 of the cam member and is effective in pivoting the gripper finger 20 and its leading end 24 a distance sutficient to cause the latter to release the weft 26.
  • cam 44 is displaced slightly in a forward direction against the biasing force of spring wires 55 and 56 so that the portions of said springs in contact with said cam are pushed into the clearance recesses 61 and 62 provided on fingers 59 and 60.
  • an elongated guide strip 67 is provided which is disposed so as to be engaged by the rear wall portion of the carrier.
  • This guide strip has a cross-sectional configuration that is L- shaped and is attached to a generally T-shaped support bracket 68 by means of bolts 69 (one only shown in FIG. 3).
  • Support bracket 68 overlies the pathway of the carrier and is adjustably assembled to a rearwardly directed shelf 70, by means of a bolt 71, that forms the upper surface of log 57.
  • the trailing end of the cam member 44 is beveled on the lower portion thereof as shown at 72 and is disposed so as to be contacted by the plow type camming surface 28 when the carrier is caused to move toward the shed or in the direction of the indicating arrows 73 and 74 in FIGS. 6 and 7 respectively.
  • the plow type camming surface is effective as the carrier continues to move toward the shed in upwardly displacing the cam member 44 against the action of springs 48 and 49 (FIG. 4) and thereby prevent actuation of the gripper finger 20.
  • the weft extending carrier enters a warp shed and is caused to meet the inserting carrier at a point near the center thereof where it receives and grips a length of weft adjacent to its cut end which was introduced by said inserting carrier. Both carriers then reverse their direction of travel and the extending carrier draws the weft through the retnainder of the shed. As the extending carrier is leaving the shed, the off-set lip 22 of its gripper finger 20 makes contact with cam member 44, and pivots said finger 6 and its leading end 24 a sufficient distance to release the weft and complete that particular pick.
  • an improved apparatus for controlling the actuation of the gripper finger of the weft extending carrier comprising:
  • a camming means mounted on said loom in a manner providing for movement between an operative position where it is contacted by the weft carrier to releast wefi from the gripper finger and in inoperative position where no contact causing operation of the gripper finger is effected;
  • a forward vertical side defining a first cam engaging surface for actuating the gripper finger to release the weft as the carrier is being withdrawn from the shed;
  • said camming means including:

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US518651A 1974-10-29 1974-10-29 Weft carrier control apparatus Expired - Lifetime US3927699A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US518651A US3927699A (en) 1974-10-29 1974-10-29 Weft carrier control apparatus
CA233,513A CA1025327A (en) 1974-10-29 1975-08-15 Weft carrier control apparatus
IT51087/75A IT1041540B (it) 1974-10-29 1975-08-27 Perfezionamento nei telai di tessitura senza navetta
DE19752540265 DE2540265A1 (de) 1974-10-29 1975-09-10 Einrichtung zum steuern eines greiffingers eines schuss-austrag-traegers einer schuetzenlosen webmaschine
FR7530962A FR2289650A1 (fr) 1974-10-29 1975-10-09 Dispositif de commande du porte-trame d'un metier a tisser sans navette
JP50124240A JPS5164065A (de) 1974-10-29 1975-10-15
CH1391275A CH595488A5 (de) 1974-10-29 1975-10-27
ES442185A ES442185A1 (es) 1974-10-29 1975-10-29 Perfeccionamientos en aparatos de control del guiahilos de trama en telares sin lanzadera.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US518651A US3927699A (en) 1974-10-29 1974-10-29 Weft carrier control apparatus

Publications (1)

Publication Number Publication Date
US3927699A true US3927699A (en) 1975-12-23

Family

ID=24064888

Family Applications (1)

Application Number Title Priority Date Filing Date
US518651A Expired - Lifetime US3927699A (en) 1974-10-29 1974-10-29 Weft carrier control apparatus

Country Status (8)

Country Link
US (1) US3927699A (de)
JP (1) JPS5164065A (de)
CA (1) CA1025327A (de)
CH (1) CH595488A5 (de)
DE (1) DE2540265A1 (de)
ES (1) ES442185A1 (de)
FR (1) FR2289650A1 (de)
IT (1) IT1041540B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986532A (en) * 1975-09-23 1976-10-19 Rockwell International Corporation Weft extending carrier
US4040454A (en) * 1974-09-23 1977-08-09 Albatex A.G. Drawing gripper for gripping and transporting weft yarns in continuous weft feed looms
US4949762A (en) * 1987-10-02 1990-08-21 Textilma Ag Weft gripper for shuttleless loom
EP0533106A1 (de) * 1991-09-16 1993-03-24 N.V. Michel Van de Wiele Steuerungsmechanismus für Greiferköpfe an Webmaschinen
WO1997040218A1 (de) * 1996-04-19 1997-10-30 Picanol N.V. Vorrichtung zum öffnen einer greiferklemme eines greifers einer webmaschine
BE1010195A3 (nl) * 1996-04-19 1998-02-03 Picanol Nv Inrichting en werkwijze voor het openen van een grijperklem.
US20120125476A1 (en) * 2009-08-07 2012-05-24 Lindauer Dornier Gesellschaft Mbh Device for transferring a band-shaped weft material
US8656962B2 (en) 2009-08-11 2014-02-25 Lindauer Dornier Gesellschaft Mbh Gripper head of a weaving machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2752955A (en) * 1955-04-05 1956-07-03 Draper Corp Thread cutter for looms
US3578031A (en) * 1968-09-27 1971-05-11 Firm Of Jean Gusken The Hook-shaped gripper point
US3613740A (en) * 1968-12-03 1971-10-19 Alsacienne Constr Meca Weft-passing device for a shuttleless loom

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2752955A (en) * 1955-04-05 1956-07-03 Draper Corp Thread cutter for looms
US3578031A (en) * 1968-09-27 1971-05-11 Firm Of Jean Gusken The Hook-shaped gripper point
US3613740A (en) * 1968-12-03 1971-10-19 Alsacienne Constr Meca Weft-passing device for a shuttleless loom

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4040454A (en) * 1974-09-23 1977-08-09 Albatex A.G. Drawing gripper for gripping and transporting weft yarns in continuous weft feed looms
US3986532A (en) * 1975-09-23 1976-10-19 Rockwell International Corporation Weft extending carrier
FR2325748A1 (fr) * 1975-09-23 1977-04-22 Rockwell International Corp Porte-trame de reception pour metier a tisser sans navette
US4949762A (en) * 1987-10-02 1990-08-21 Textilma Ag Weft gripper for shuttleless loom
EP0533106A1 (de) * 1991-09-16 1993-03-24 N.V. Michel Van de Wiele Steuerungsmechanismus für Greiferköpfe an Webmaschinen
BE1005396A3 (nl) * 1991-09-16 1993-07-13 Wiele Michel Van De Nv Sturingsmechanisme voor de grijperkoppen bij weefmachines.
US5271434A (en) * 1991-09-16 1993-12-21 N.V. Michel Van De Wiele Control mechanism for the rapier heads of weaving machines
WO1997040218A1 (de) * 1996-04-19 1997-10-30 Picanol N.V. Vorrichtung zum öffnen einer greiferklemme eines greifers einer webmaschine
BE1010195A3 (nl) * 1996-04-19 1998-02-03 Picanol Nv Inrichting en werkwijze voor het openen van een grijperklem.
US20120125476A1 (en) * 2009-08-07 2012-05-24 Lindauer Dornier Gesellschaft Mbh Device for transferring a band-shaped weft material
US8550123B2 (en) * 2009-08-07 2013-10-08 Lindauer Dornier Gesellschaft Mbh Device for transferring a band-shaped weft material
US8656962B2 (en) 2009-08-11 2014-02-25 Lindauer Dornier Gesellschaft Mbh Gripper head of a weaving machine

Also Published As

Publication number Publication date
IT1041540B (it) 1980-01-10
CA1025327A (en) 1978-01-31
CH595488A5 (de) 1978-02-15
JPS5164065A (de) 1976-06-03
DE2540265A1 (de) 1976-05-06
FR2289650A1 (fr) 1976-05-28
ES442185A1 (es) 1977-04-01

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Legal Events

Date Code Title Description
AS Assignment

Owner name: DRAPER CORPORATION,

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

Effective date: 19820920

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

AS Assignment

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

AS Assignment

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

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

Effective date: 19860328

AS Assignment

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