US3776281A - Weft carrier for shuttleless looms - Google Patents

Weft carrier for shuttleless looms Download PDF

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Publication number
US3776281A
US3776281A US00256497A US3776281DA US3776281A US 3776281 A US3776281 A US 3776281A US 00256497 A US00256497 A US 00256497A US 3776281D A US3776281D A US 3776281DA US 3776281 A US3776281 A US 3776281A
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United States
Prior art keywords
weft
carrier
trapping
hooked
shed
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
US00256497A
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English (en)
Inventor
R Volpe
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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
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Publication of US3776281A publication Critical patent/US3776281A/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
    • 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

Definitions

  • the latter type of carrier is normally provided with a hooked portion and a cooperating thread tensioning means which receive and trap the filling from the companion carrier at a point approximately midway withing the warp shed.
  • the introduced weft yarn is in the form of a loop and the withdrawing of the extending carrier causes said weft to move endwise through the hooked portion and cooperating tensioning means, thereby extending an end of weft which will have been severed to a predetermined length sufficient to complete a give pick.
  • weft receiving or extending carriers are of a well known basic design in which their weft engaging hooked portions and cooperating tensioning means are disposed on the forward sides of said carriers or, in other words those sides which face the fell of the fabric during the performance of their intended function.
  • This form of weft carrier has functioned satisfactorily under proper weaving conditions which include accurate timing and setting of the carrier members as well as full and complete shedding of the warp yarns.
  • timing of the shedding function is such that the upper and lower sheets of warp threads are moving so as to close the shed immediately upon withdrawal of the carrier therefrom.
  • the warp threads of the upper warp sheet are pressing uponthe carrier and if the timing of the shedding function is not precisely accurate, the warp threads of said upper warp sheet have been known to exert sufficient pressure upon the combined trapping and tensioning member of the carrier so as to lessen the tension under which the weft yarn is being extended.
  • Loss of tension on the weft yarn can result in complete loss of said weft from the carrier thus causing a so-called short pick or the accumulation of a length of weft in a given area which in both cases would produce an obvious imperfection in the woven fabric. Additionally a loss of tension on the weft by the extending carrier will result in the woven fabric having a non-uniform overall appearance. Under a condition of this nature, the interlacing of the weft yarn with the warp yarns will produce a different visual effect to the woven fabric in the area where the weft was introduced under tension relative to that area where tension was lessened or lost by the extending carrier.
  • the improved weft entending carrier according to the present invention has corrected the aforementioned problems that exist with extending carriers of the prior art. With the trend toward greater fabric production by increased operational speed, it has been determined that an extending carrier having improved performance qualities such as are provided by the instant invention will increase substantially the operating efficiency of shuttleless looms to which said invention is applicable.
  • the improved weft extending carrier of the present invention has its weft engaging hook and the combined weft trapping and tensioning member operatively associated with said hook disposed on that side of said carrier which travels adjacent to the looms reed during the performance of its intended function.
  • a guide means in the form of an integrally formed. blade member provides an extension of the flexible tape to which the carrier is attached and is disposed so as to maintain the weft engaging hook and combined trapping and tensioning member of the carrier in its intended horizontal path of travel during its insertion into the shed formed by warp threads.
  • a further object of the invention is to provide an extending carrier the component parts of which are disposed so as to prevent a loss or decrease in tension of the weft yarn as it is being extended, and to draw said weft through that portion of the shed which provides the maximum amount of clearance therefor.
  • a further and more specific object of the invention is to provide a carrier capable of functioning in a manner to prevent harmful and damaging effects thereto in the event of unintentional interference with its companion carrier.
  • FIG. 1 is a side view of the carrier according to the invention as seen looking from the back of the loom,
  • FIG. 2 is a top view of the carrier shown in FIG. 1,
  • FIG. 3 is a view similar to FIG. 1 but showing the carrier as seen fromthe front of a loom,
  • FIG. 4 is a side view of the base portion of the carrier showing the blade member for guiding the carrier in a horizontal path during its insertion into the shed and,
  • FIG. 5 is a side view of the upper portion of the carrier which is adapted to be secured to the base portion shown in FIG. 4.
  • flexible carriers or tapes are used to reciprocate the thread carrying members themselves which are caused to enter the shed and to be withdrawn therefrom.
  • the tapes are projected into the shed to a point approximately adjacent to the center thereof at which. the weft extending carrier meets the inserting carrier to transfer the weft yarn to be drawn through the remainder of the shed.
  • a weft receiving or extending carrier generally indicated by numeral 1 1 (FIGS. 1, 2 and 3).
  • This carrier as shown in FIG. 4 includes a base portion 12 having fixed to its rearward side a blade member 13 which serves to maintain said carriers in a horizontal path of travel as it enters the shed.
  • the lower edge 14 of the blade member is disposed in the same plane as the lower surface of the tape 10.
  • the lower surface of the base portion 12 includes a recessed planar surface 17 (FIG. 4) that provides a means for positioning said base portion on the tape 10 where it is fixed by any suitable means such as brazing or the like.
  • the upper surface of the base portion 12 is provided with a centrally disposed and longitudinally extending groove 18 which is adapted to receive therein a tongue 19 (FIG. 5) that depends from the trailing underside of a hooked member or carrier body portion identified generally by numeral 20.
  • the carrier body portion 20 is fixed to the base portion 12 in the same manner as the means for attaching said base portion to the tape 10.
  • the carrier body portion 20 includes a forward vertically disposed planar surface 21 which at its leading end or that end opposite its attachment to the base portion 12, terminates in the form of a point 22.
  • the vertically disposed planar surface 21 is provided with a substantially flat laterally extending top surface 23 (FIG. 2). From a point approximately midway of the body portions length to its trailing end, the combination of the planar surface 21 and top surface 23 has a cross sectioned configuration which is substantially rectangular except for the tongue 19 which depends from and j extends for a portion of the body portions length on the lower surface thereof.
  • This section of the carriers body portion 20 defines a web-like section 24 having a I vertically disposed rearward surface 25 (FIG.
  • One end of a combined trapping and tensioning member 26 is adapted to assemble on the rearward surface 25 of the web-like section 24 by means of two machine screws 27 and 28 which pass through apertures provided in said web-like section 24 and then through aligned openings in said combined trapping and tensioning member 26 where they then have their threaded ends assembled in aligned threaded holes of an anchor plate 29.
  • the trailing end 30 of the carrier 11 (FIG. 2) is tapered in such a manner as to blend with the tape 10 to which it is attached and the end of said tape adjacent its point of attachment to the carrier is also tapered so as to conform dimensionally with said trailing end 30.
  • That portion of the carrier extending from the web-like section 24 to its leading end is of a generally L shaped configuration which is formed by the reduced thickness of the top surface 23 in this area.
  • the top surface 23 at and adjacent the leading end of the carrier extends rearwardly and is provided on the rearward side thereof with a downwardly directed flat surface 31 (FIGS. 1 and 2) from which a lower surface 32 extends forwardly to the vertically disposed planar surface 21.
  • a weft receiving notch 33 is formed below the top surface 23 and as part of the lower surface 32.
  • portion of the top surface 23, intermediate the leading end of the carrier and its weblike section 24 is of reduced width as at 35 and permits the combined trapping and tensioning member 26 by means of its attachment to said web-like section to be spring biased into frictional contact with the flat surface 31 disposed on the rearward side of and adjacent said carriers leading end.
  • That end of the combined trapping andtensioning member 26 in frictional contact with the flat surface 31 is provided on the lower side thereof with a laterally extending lip 36 which is directed in a forwardly direction so as to underlie a portion of the lower surface 32 (FIG. 2) and serves to direct the weft yarn into the weft receiving notch 33 during transfer from the inserting carrier.
  • This laterally extending lip 36 also serves to retain the weft under tension between the flat surface 31 and that portion of the combined trapping and tensioning member 26 in contact therewith when the extending carrier reverses its direction of travel to extend an inserted loop of weft through the remainder of the shed.
  • a rib member 37 is formed on the top surface 23 and as shown in FIG. 2 extends in longitudinal direction for a portion of the carriers length and is then directed obliquely rearwardly and terminates on said top surface adjacent to the flat surface 31.
  • This rib member 37 provides added rigidity to the carriers body portion 20 and additionally serves to prevent unintentional contact of a closing upper warp sheet with the combined trapping and tensioning member 26.
  • the carrier enters the warp shed and is maintained in a true horizontal path during its insertion by its integrally formed blade member 13.
  • the leading inclined surface 34 of the extending carrier engages the loop of weft introduced by the inserting carrier.
  • the weft is caused to slide rearwardly along the inclined surface 34 and to enter between the flat surface 31 and that portion of the combined trapping and tensioning member 26 in frictional contact therewith.
  • the extending carrier reverses its direction of travel the weft is caught by the receiving notch 33 and as said weft is extended it is held under a desired amount of tension as it moves between the flat surface 31 and the combined trapping and tensioning member 26.
  • a weft receiving carrier for receiving a loop of weft from a companion carrier adapted to insert that loop part way through the warp shed and for extending an end from said weft loop across the remainder of the shed, said weft receiving carrier comprising a hooked member with a combined trapping and tensioning member mounted for operative cooperation therewith, guide means having an integrally formed blade member with a lower edge defining an extension of a tape member and disposed so as to extend in spaced and generally parallel with said trapping and tensioning member for maintaining the latter and said hooked member in a generally horizontal plane during their insertion into the warp shed, a raised rib member integrally formed on the upper side of said hooked member for preventing contact of the warp threads with said combined trapping and tensioning member, said hooked member having a vertical rearward surface, a lower horizontal surface extending forwardly therefrom,

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US00256497A 1972-05-24 1972-05-24 Weft carrier for shuttleless looms Expired - Lifetime US3776281A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25649772A 1972-05-24 1972-05-24

Publications (1)

Publication Number Publication Date
US3776281A true US3776281A (en) 1973-12-04

Family

ID=22972454

Family Applications (1)

Application Number Title Priority Date Filing Date
US00256497A Expired - Lifetime US3776281A (en) 1972-05-24 1972-05-24 Weft carrier for shuttleless looms

Country Status (10)

Country Link
US (1) US3776281A (fr)
JP (1) JPS5218834B2 (fr)
BE (1) BE800003A (fr)
BR (1) BR7303444D0 (fr)
CH (1) CH554432A (fr)
DE (1) DE2325801A1 (fr)
ES (1) ES415101A1 (fr)
FR (1) FR2185705B1 (fr)
GB (1) GB1369953A (fr)
IT (1) IT980377B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4531556A (en) * 1983-10-24 1985-07-30 Draper Corporation Carrier tape for shuttleless looms

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5346878A (en) * 1976-10-09 1978-04-26 Kinichi Kimura Synthetic resin sealed container and sealing method thereof
JPS6010766U (ja) * 1983-07-01 1985-01-24 藤森工業株式会社 包装容器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3119416A (en) * 1961-09-22 1964-01-28 Draper Corp Filling carriers for shuttleless looms
US3688807A (en) * 1969-04-30 1972-09-05 Somet Soc Mec Tessile Weft drawing gripper for looms

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR598697A (fr) * 1925-02-24 1925-12-22 Cash A W Co Perfectionnements apportés aux dispositifs régulateurs
FR759886A (fr) * 1932-11-12 1934-02-13 Perfectionnements aux navettes sans canette pour métiers à tisser
US3034539A (en) * 1960-03-11 1962-05-15 Draper Corp Filling carrier for shuttleless looms
US3298400A (en) * 1964-10-29 1967-01-17 Draper Corp Filling carrier for shuttleless looms

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3119416A (en) * 1961-09-22 1964-01-28 Draper Corp Filling carriers for shuttleless looms
US3688807A (en) * 1969-04-30 1972-09-05 Somet Soc Mec Tessile Weft drawing gripper for looms

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4531556A (en) * 1983-10-24 1985-07-30 Draper Corporation Carrier tape for shuttleless looms

Also Published As

Publication number Publication date
DE2325801A1 (de) 1973-12-06
FR2185705A1 (fr) 1974-01-04
ES415101A1 (es) 1976-02-16
BE800003A (fr) 1973-09-17
CH554432A (de) 1974-09-30
BR7303444D0 (pt) 1974-07-25
IT980377B (it) 1974-09-30
JPS5218834B2 (fr) 1977-05-24
JPS4941672A (fr) 1974-04-19
FR2185705B1 (fr) 1976-09-17
GB1369953A (en) 1974-10-09

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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