US3842867A - Weft inserting carrier - Google Patents

Weft inserting carrier Download PDF

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Publication number
US3842867A
US3842867A US00343797A US34379773A US3842867A US 3842867 A US3842867 A US 3842867A US 00343797 A US00343797 A US 00343797A US 34379773 A US34379773 A US 34379773A US 3842867 A US3842867 A US 3842867A
Authority
US
United States
Prior art keywords
weft
carrier
guide
clamping
lip
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
US00343797A
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English (en)
Inventor
R 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 US00343797A priority Critical patent/US3842867A/en
Priority to CA191,364A priority patent/CA994213A/en
Priority to GB955874A priority patent/GB1403869A/en
Priority to BE141828A priority patent/BE812086A/xx
Priority to FR7408271A priority patent/FR2222467B1/fr
Priority to AT220074A priority patent/AT327835B/de
Priority to NL7403682A priority patent/NL7403682A/xx
Priority to BR2232/74A priority patent/BR7402232D0/pt
Priority to CH396774A priority patent/CH578064A5/xx
Priority to DE2413775A priority patent/DE2413775A1/de
Application granted granted Critical
Publication of US3842867A publication Critical patent/US3842867A/en
Assigned to DELTA ACQUISTION CORPORATION reassignment DELTA ACQUISTION CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ROCKWELL INTERNATIONAL CORPORATION
Assigned to DRAPER CORPORATION, reassignment DRAPER CORPORATION, CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE APRIL 1,1982 Assignors: DELTA ACQUISITION 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
    • 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
    • D03D47/233—Carrying grippers

Definitions

  • the shuttleless loom to which the present invention is applicable is of the single pick insertion type and, as described in US. Pat. No. 3,431,951, the weft yarn extends through an eyelet in the rear wall of the inserting carrier and remains threaded therethrough during the performance of said carriers intended function.
  • the weft yarn To insert single picks in this type of loom, the weft yarn must be clamped, held and then cut adjacent the shed each time the inserting carrier is withdrawn. In preparation for the next succeeding pick the weft yarn must be manipulated so as to be caught by a clamping element carried in the front wall of the inserting carrier.
  • a clamping element carried in the front wall of the inserting carrier.
  • Inserting carriers utilized for inserting single picks of weft have performed their intended function with a degree of success; however, certain adverse occurrences have presented themselves when attempts have been made to increase the operating speed of such looms.
  • the eyelet in the rear side wall of the carrier through which the weft remains threaded is disposed so that when the weft is presented to the clamping element located in the front side wall, the weft is caused to traverse the distance between the side walls, at a predetermined angle proper for its presentation and transfer to the extending carrier.
  • the location of this eyelet being disposed relatively close to the lower edge of the rear side wall, subjects the weft to considerable frictional drag as the carrier is withdrawn from the shed. This condition is due to the elevated position of the weft supply and the guiding elements through which it must pass prior to passing through the eyelet. such frictional drag on the weft has been responsible for weft yarn breakage and an increase in operating speed of the loom has substantially aggrevated this condition.
  • the weft inserting carrier has overcome the carrier problems referred to above by providing a weft guide in the rear wall of the carrier which permits the weft to move to a position where less frictional drag occurs on the weft as the carrier is being withdrawn from the shed. It also includes a camming surface adapted to guide the weft downwardly during its presentation to the clamping element so that it will assume the required angle at which it must be presented to the extending carrier.
  • the weft receiving and clamping means includes a spring biased weft engaging member having increased contact surface for clamping the weft and a variable biasing force along said surface which at the wefts entrance end is relatively light and becomes progressively stronger along the longitudinal length of the surface. This feature permits the weft to be located in the receiving and clamping means in a position to assure adequate holding thereof during its insertion into the shed as well as its release to the extending carrier at time of transfer.
  • the weft inserting carrier comprising the invention is provided in the rear side wall thereof with a weft guide means in the form of an angularly disposed slot the sides of which serves as a weft camming surface.
  • a weft guide means in the form of an angularly disposed slot the sides of which serves as a weft camming surface.
  • the front wall of the carrier is provided with a guide finger for directing the weft into the clamping member which is in the form of a flat planar weft engaging surface yieldingly urged into contact with the lower side of a laterally extending lip that forms an integral part of said front wall.
  • the weft engaging surface of this clamping member is provided at each end thereof with integral extensions in the form of leaf spring members.
  • the terminal portions of these spring members bear against the guide finger to urge the weft engaging surface into contact with the lip of the front wall.
  • the length of the spring member at the weft entrance end of the clamping member is substantially greater than that of the spring member at the opposite end.
  • the difference in length of these spring members provides a relatively light biasing force at the weft entrance end of the clamping member and a greater biasing force at the opposite end. This form of biasing force permits the weft to enter the clamping member with a minimum of resistance and provides sufficient clamping properties intermediate the ends thereof for holding the weft during its insertion and its release to the extending carrier.
  • a further object of the invention is to devise an inserting carrier which will provide a minimum of frictional resistance to the weft yarn caused to pass therethrough.
  • FIG. 1 is a plan view of an inserting carrier showing the features of the invention applied thereto;
  • FIG. 2 is a side elevation of the carrier shown in FIG.
  • FIG. 3 is an end view as seen looking from the leading end of the carrier or from the left side of FIG. 2;
  • FIG. 4 is a perspective view of the carriers weft clamping member
  • FIG. 5 is a perspective view of the carriers guide finger which supports the weft clamping member.
  • FIG. 3 shows the weft inserting carrier having a sectional configuration conforming generally to that of an inverted U which includes a rear side wall and a front side wall identified generally by numeral 11. These side walls are connected by a top planar surface 12.
  • the leading end of the carrier is at the left in FIGS. 1 and 2 and its trailing end is shown as having a flexible tape 13 attached thereto which is adapted to reciprocate the carrier to and fro along a portion of the warp shed in a known manner.
  • the rear side wall 10 of the carrier has a V-shaped leading edge extending from a point 14 which is forwardmost on said carrier.
  • the front side wall 11 as shown in FIGS. 2 and 3 is provided with an upper surface 15 which extends forwardly from the trailing end of the carrier for a substantial portion of the latters length and includes at its leading end a laterally extending lip 16.
  • Integral with and offset from the upper surface 15 of the front side wall is a downwardly directed web 17 which forms the lower portion of front wall 11.
  • Web 17 extends forwardly from the trailing end of the carrier for a distance approximately half the length of the upper surface 15 where it is directed upwardly as at 18 to join with the latter (FIG. 2).
  • a weft guide member generally indicated by numeral 19 (FIG. 5) having a supporting end 20 with an integrally formed finger 21 extending therefrom assembles to the web 17 by means of screws 22. Screws 22 pass through holes in said web and are threadably received into aligned threaded holes 23 provided in the supporting end 20 of guide 19. Finger 21 extends in a direction parallel with the rear wall 10 as well as beneath and in spaced relation to the lip 16 and terminates in a sloped weft engaging surface 24.
  • Surface 26 of the clamping member is continually urged into frictional contact with the underside of lip 16 by means of flat springs which form an integral part of and which extend from each end of said surface 26.
  • the spring at the forward end of surface 26 is identified by numeral 28 and that at the opposite end by numeral 29.
  • the end of spring 29 is caused to bear against a step surface 30 (FIG. 5) formed at the junction of the support end 20 and finger 21 of the weft guide member 19.
  • the end of spring 28 is seated in a recess or pocket 31 (FIG. 5) provided in the upper surface of finger 21.
  • the depending aprons 27 extend downwardly along the side of the finger 21 and serve to stabilize the weft clamping member 25 in its assembled position.
  • the rear side wall 10 of the carrier includes a weft guide means formed as an angularly disposed elongated opening 32 through which weft yarn 33 from a fixed source outside of the loom is continually threaded.
  • the sides of this elongated opening 32 serve as camming surfaces for the weft and are effective in guiding said weft to the uppermost end thereof during withdrawal of the carrier from the shed and to the lower or opposite end when the carrier is caused to move toward the shed to insert a pick of weft.
  • a weft locating stop 34 having a generally L-shaped configuration is fixed by any suitable means, such as by brazing to the lip 16 and serves to locate the weft when drawn between the clamping member 25 and said lip in a location which provides the desired clamping force on said weft. Additionally, this locating stop 34 serves to prevent the weft from being pulled completely through the clamping area in the event the weft yarn positioner of the type described in the aforementioned US. Pat. 3,431,951 fails to cut and release the weft during its insertion into a shed.
  • the inserting carrier is caused to enter a shed and present a cut end of weft to an extending carrier which draws the weft through the remainder of the shed to complete a single pick.
  • the weft yarn remains threaded through the angular disposed elongated opening 32.
  • the weft as shown in FIG. 2 moves to a second location at the upper end of opening 32 which permits it to pass through the carrier with a minimum of frictional resistance.
  • the weft yarn positioner When the carrier is withdrawn from the shed the weft yarn positioner is caused to grip the weft and move it to a position toward the front of the loom and at the same time cut and hold that portion which extends through the carrier to its source of supply. As the carrier commences to move toward the shed to insert the next pick the weft extending from the weft yarn positioner is caused to move to a first location at the lowermost position within opening 32 and at the same time contact the sloped weft engaging surface 24 of the guide member 19. Further movement of the carrier toward the shed causes the weft to be cammed to that position shown in FIG. 1 where it is held by the biasing force of the clamping member 25 against the underside of lip 16.
  • FIG. 3 shows the angular position of the weft 33 within the inserting carrier which is necessary for presentation and transfer to the extending carrier. In this position the weft is located in a first location or the lowermost portion of opening 32 and traversing the distance within the carrier it is directed angularly upward to that position where it is gripped by the lip and clamping member 25.
  • a weft inserting carrier which comprises front and rear side walls with a top planar surface interconnected therewith, a weft guide means in said rear side wall through which the weft yarn passes, said weft guide means being effective to guide the weft between said first and second locations and a weft receiving and clamping means carried by said front wall forclamping the weft end when the weft is being inserted into the warp shed, said clamping means including a guide finger fixed to said front wall, a laterally extending lip forming a part of the latter, and a weft engaging member carried by said guide finger, biasing means formed integrally with said weft engaging member to urge said member into yieldable contact with said lip in a manner such that the weft is subjected to increasing pressure upon insertion between said member and said lip.
  • said biasing means includes an integrally formed leaf spring member at each end of said weft engaging member with the length of one spring member being greater than the other to effect a greater biasing force at one end of said engaging member than at the opposite end.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US00343797A 1973-03-22 1973-03-22 Weft inserting carrier Expired - Lifetime US3842867A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US00343797A US3842867A (en) 1973-03-22 1973-03-22 Weft inserting carrier
CA191,364A CA994213A (en) 1973-03-22 1974-01-30 Weft inserting carrier
GB955874A GB1403869A (en) 1973-03-22 1974-03-04 Weft inserter
BE141828A BE812086A (fr) 1973-03-22 1974-03-08 Porte-fil d'insertion de trame
FR7408271A FR2222467B1 (de) 1973-03-22 1974-03-12
AT220074A AT327835B (de) 1973-03-22 1974-03-18 Greiferkopf fur webmaschinen mit zwei gegenlaufigen schussfadengreifern
NL7403682A NL7403682A (de) 1973-03-22 1974-03-19
CH396774A CH578064A5 (de) 1973-03-22 1974-03-21
BR2232/74A BR7402232D0 (pt) 1973-03-22 1974-03-21 Aperfeicoamentos em porta-trama de insercao
DE2413775A DE2413775A1 (de) 1973-03-22 1974-03-21 Schussfadeneintraggreifer fuer schuetzenlose webstuehle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00343797A US3842867A (en) 1973-03-22 1973-03-22 Weft inserting carrier

Publications (1)

Publication Number Publication Date
US3842867A true US3842867A (en) 1974-10-22

Family

ID=23347707

Family Applications (1)

Application Number Title Priority Date Filing Date
US00343797A Expired - Lifetime US3842867A (en) 1973-03-22 1973-03-22 Weft inserting carrier

Country Status (10)

Country Link
US (1) US3842867A (de)
AT (1) AT327835B (de)
BE (1) BE812086A (de)
BR (1) BR7402232D0 (de)
CA (1) CA994213A (de)
CH (1) CH578064A5 (de)
DE (1) DE2413775A1 (de)
FR (1) FR2222467B1 (de)
GB (1) GB1403869A (de)
NL (1) NL7403682A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3931837A (en) * 1975-03-05 1976-01-13 Rockwell International Corporation Carrier for shuttleless loom
US3960183A (en) * 1975-02-03 1976-06-01 Rockwell International Corporation Interchangeable weft carrier
US4071055A (en) * 1975-09-29 1978-01-31 Ruti Machinery Works Ltd. Inserting carrier for looms with removal of a filling yarn from stationary bobbins
US4284108A (en) * 1979-11-13 1981-08-18 Adolph Saurer Limited Thread gripper
US4757844A (en) * 1987-05-05 1988-07-19 Vamatex S.P.A. Weft grippers for shuttleless weaving looms

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0441099B1 (de) * 1990-02-05 1996-01-31 Sulzer RàœTi Ag Bringergreifer für Greiferwebmaschinen
IT231509Y1 (it) * 1993-10-27 1999-08-03 Interpatents Ltd Pinza portante per macchine per tessitura.
JPH1136159A (ja) * 1997-07-11 1999-02-09 Toyota Autom Loom Works Ltd レピア織機における緯入れ装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH502461A (de) * 1969-11-27 1971-01-31 Fischer Ag Brugg Georg Greiferpaar für den Schusseintrag in einer Webmaschine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3960183A (en) * 1975-02-03 1976-06-01 Rockwell International Corporation Interchangeable weft carrier
US3931837A (en) * 1975-03-05 1976-01-13 Rockwell International Corporation Carrier for shuttleless loom
US4071055A (en) * 1975-09-29 1978-01-31 Ruti Machinery Works Ltd. Inserting carrier for looms with removal of a filling yarn from stationary bobbins
US4284108A (en) * 1979-11-13 1981-08-18 Adolph Saurer Limited Thread gripper
US4757844A (en) * 1987-05-05 1988-07-19 Vamatex S.P.A. Weft grippers for shuttleless weaving looms

Also Published As

Publication number Publication date
BE812086A (fr) 1974-07-01
AT327835B (de) 1976-02-25
BR7402232D0 (pt) 1974-12-03
GB1403869A (en) 1975-08-28
CH578064A5 (de) 1976-07-30
CA994213A (en) 1976-08-03
DE2413775A1 (de) 1974-09-26
FR2222467B1 (de) 1977-09-23
NL7403682A (de) 1974-09-24
FR2222467A1 (de) 1974-10-18
ATA220074A (de) 1975-04-15

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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