EP0164034A2 - Weft-carrying grippers for shuttleless weaving looms - Google Patents

Weft-carrying grippers for shuttleless weaving looms Download PDF

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Publication number
EP0164034A2
EP0164034A2 EP85106397A EP85106397A EP0164034A2 EP 0164034 A2 EP0164034 A2 EP 0164034A2 EP 85106397 A EP85106397 A EP 85106397A EP 85106397 A EP85106397 A EP 85106397A EP 0164034 A2 EP0164034 A2 EP 0164034A2
Authority
EP
European Patent Office
Prior art keywords
grippers
weft
plastic material
shells
gripper
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.)
Granted
Application number
EP85106397A
Other languages
German (de)
French (fr)
Other versions
EP0164034B1 (en
EP0164034A3 (en
Inventor
Luigi Pezzoli
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.)
Vamatex SpA
Original Assignee
Vamatex SpA
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 Vamatex SpA filed Critical Vamatex SpA
Priority to AT85106397T priority Critical patent/ATE46374T1/en
Publication of EP0164034A2 publication Critical patent/EP0164034A2/en
Publication of EP0164034A3 publication Critical patent/EP0164034A3/en
Application granted granted Critical
Publication of EP0164034B1 publication Critical patent/EP0164034B1/en
Expired 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
    • 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 present invention concerns important improvements in the weft carrying grippers for shuttleless weaving looms, namely in those members by which the weft yarns are inserted at one end of the Loom and are carried to the opposite end thereof through the warp shed.
  • the present invention faces the problem of constructing the members carrying the weft yarn through the shed in a fully original way, by taking advantage of the positive aspects of the specific characteristics of the two types of grippers known so far, while eliminating the defects of both.
  • each gripper is formed of a composite structure consisting of two metal sheLLs, stiffly connected with a central body of synthetic plastic material, wherein said metal shells are partially incorporated.
  • said shells are provided with hooks, projections, recesses, or Like, for anchorage to the central body of plastic material.
  • the carrying gripper P is shown to be formed of a lower metal shell 1, having a V-shaped section with the sides joining into a single element 2 at the front and parting into two ears 3 rearwardly, of a central body 4 of synthetic plastic material, and of an upper metal shell 5, in the form of a warp guard for the body 4 and having a front hook end 6 and a rear forked end 7.
  • the gripper P has its structure formed by the stiff connection - obtained by injection molding of the body 4 between the metal sheLLs 1 and 5 - of the three component elements. Thanks to the shape of the ends of the shells 1 and 5, and to the presence therein of other coupling elements, as recesses 8 or projections, the connection between said elements is most efficiently achieved.
  • the shells 1 and 5 are moreover substantially incorporated into the central body 4 and, once assembled, the structure of the gripper appears as a very compact unit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
  • Warping, Beaming, Or Leasing (AREA)

Abstract

In a pair of weft carrying grippers for shuttleless weaving looms, each gripper is formed of a composite structure consisting of two metal shells, stiffly connected with a central body of synthetic plastic material, wherein said metal shells are partially incorporated.

Description

  • The present invention concerns important improvements in the weft carrying grippers for shuttleless weaving looms, namely in those members by which the weft yarns are inserted at one end of the Loom and are carried to the opposite end thereof through the warp shed.
  • Up to date, said grippers have always been made either of metal or of synthetic plastic material, suffering in the first case from an excess of weight while involving considerable costs, and in the second case from scarce stiffness. The efforts of designers and constructors have always aimed at reducing said defects, by acting separately on both types of grippers. Thus, improvements have been gradually introduced in each type of gripper, generaLLy concerning the configuration of the gripper itself, said improvements intending - in the case of metal grippers - to reduce the weights and simplify their structure and the methods adopted for the construction thereof, and - in the case of plastic grippers - to stiffen the structure thereof.
  • In spite of the progress achieved, the metal grippers as well as those of plastic material are still, to date, not quite satisfactory, especially if having to equip the modern Looms working at very high speeds.
  • The present invention faces the problem of constructing the members carrying the weft yarn through the shed in a fully original way, by taking advantage of the positive aspects of the specific characteristics of the two types of grippers known so far, while eliminating the defects of both.
  • For this purpose, the pair of grippers according to the invention is substantially characterized in that, each gripper is formed of a composite structure consisting of two metal sheLLs, stiffly connected with a central body of synthetic plastic material, wherein said metal shells are partially incorporated.
  • PreferabLy, said shells are provided with hooks, projections, recesses, or Like, for anchorage to the central body of plastic material.
  • The invention will now be described in further detail with reference to a preferred embodiment thereof, illustrated in the accompanying drawings, in which:
    • Fig. 1 is an exploded perspective view of the carrying gripper forming the pair of grippers according to the invention; and
    • Fig. 2 is an exploded perspective view of the drawing gripper forming the pair of grippers according to the invention.
  • With reference to figure 1 of the drawings, the carrying gripper P is shown to be formed of a lower metal shell 1, having a V-shaped section with the sides joining into a single element 2 at the front and parting into two ears 3 rearwardly, of a central body 4 of synthetic plastic material, and of an upper metal shell 5, in the form of a warp guard for the body 4 and having a front hook end 6 and a rear forked end 7.
  • According to the invention, the gripper P has its structure formed by the stiff connection - obtained by injection molding of the body 4 between the metal sheLLs 1 and 5 - of the three component elements. Thanks to the shape of the ends of the shells 1 and 5, and to the presence therein of other coupling elements, as recesses 8 or projections, the connection between said elements is most efficiently achieved. The shells 1 and 5 are moreover substantially incorporated into the central body 4 and, once assembled, the structure of the gripper appears as a very compact unit.
  • The same result is obtained in the drawing gripper T of figure 2, which is formed of a lower metal sheLL 9, having a shape which is fairly similar to that of the shell 1 of the carrying gripper P, of a central body 10 of synthetic plastic material, and of an upper shell 11, comprising a frame portion 12 and an extension or tail 13 ending with ears 14.
  • It is understood that, besides the one described and illustrated by mere way of example, there may be other practical embodiments of the invention falling within the protection scope of the same.

Claims (3)

1) A pair of weft carrying grippers for shuttleless weaving looms, characterized in that, each gripper is formed of a composite structure consisting of two metal shells, stiffly connected with a central body of synthetic plastic material, wherein said metal shells are partially incorporated.
2) A pair of weft carrying grippers as in claim 1), wherein said shells are provided with hooks, projections, recesses, or like, for anchorage to the central body of plastic material.
3) A pair of weft carrying grippers as in claim 1), wherein said composite structure of the grippers is obtained by injection molding of synthetic plastic material between said shells.
EP85106397A 1984-06-07 1985-05-24 Weft-carrying grippers for shuttleless weaving looms Expired EP0164034B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85106397T ATE46374T1 (en) 1984-06-07 1985-05-24 WEFT GRIPPER FOR SHUTTLELESS LOOPPING MACHINES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2129284 1984-06-07
IT21292/84A IT1196138B (en) 1984-06-07 1984-06-07 PAIR OF PLIER PLIERS FOR WEAVING FRAMES WITHOUT SHUTTLES WITH PERFECT STRUCTURE

Publications (3)

Publication Number Publication Date
EP0164034A2 true EP0164034A2 (en) 1985-12-11
EP0164034A3 EP0164034A3 (en) 1987-03-25
EP0164034B1 EP0164034B1 (en) 1989-09-13

Family

ID=11179639

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85106397A Expired EP0164034B1 (en) 1984-06-07 1985-05-24 Weft-carrying grippers for shuttleless weaving looms

Country Status (10)

Country Link
EP (1) EP0164034B1 (en)
JP (1) JPH07857B2 (en)
KR (1) KR930000370B1 (en)
AT (1) ATE46374T1 (en)
BR (1) BR8502724A (en)
DE (1) DE3573004D1 (en)
ES (1) ES8607434A1 (en)
HK (1) HK34790A (en)
IT (1) IT1196138B (en)
TR (1) TR23274A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4757844A (en) * 1987-05-05 1988-07-19 Vamatex S.P.A. Weft grippers for shuttleless weaving looms
EP1256644A1 (en) * 2001-05-08 2002-11-13 Promatech S.p.A. Weft carrying gripper for weaving looms adjustable in respect of the thickness of the weft yarn

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3043467U (en) * 1997-05-16 1997-11-18 味の素株式会社 Cap stopper for sorting containers
KR100330283B1 (en) * 1998-03-09 2002-06-20 이규건 Weft carrying gripper
IT1304698B1 (en) * 1998-12-23 2001-03-28 Somet Soc Mec Tessile PAIR OF CARRIER AND TRACTOR PLIERS FOR WEAVING FRAMES
KR100351416B1 (en) * 1999-07-07 2002-09-09 대흥정밀공업 주식회사 Gripper head for rapier loom

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2020879A1 (en) * 1969-04-30 1970-11-05 Somet Soc Mec Tessile Transfer gripper for weft thread transport in weaving machines with continuous weft thread feed
US3580291A (en) * 1967-09-19 1971-05-25 Somet Soc Mec Tessile Filling carrier for use in shuttleless looms
DE1785385B2 (en) * 1967-09-19 1973-05-30 Somet SpA Societa Meccanica Tessile, Gazzaniga, Bergamo (Italien) FEEDER GRIPPER FOR WEAVING MACHINES WITH CONTINUOUS WEFT FEED
DE2644343A1 (en) * 1975-10-03 1977-04-14 Somet Soc Mec Tessile FEEDER GRIPPER FOR WEAVING MACHINES WITH CONTINUOUS WEFT FEED

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3580291A (en) * 1967-09-19 1971-05-25 Somet Soc Mec Tessile Filling carrier for use in shuttleless looms
DE1785385B2 (en) * 1967-09-19 1973-05-30 Somet SpA Societa Meccanica Tessile, Gazzaniga, Bergamo (Italien) FEEDER GRIPPER FOR WEAVING MACHINES WITH CONTINUOUS WEFT FEED
DE2020879A1 (en) * 1969-04-30 1970-11-05 Somet Soc Mec Tessile Transfer gripper for weft thread transport in weaving machines with continuous weft thread feed
DE2644343A1 (en) * 1975-10-03 1977-04-14 Somet Soc Mec Tessile FEEDER GRIPPER FOR WEAVING MACHINES WITH CONTINUOUS WEFT FEED

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4757844A (en) * 1987-05-05 1988-07-19 Vamatex S.P.A. Weft grippers for shuttleless weaving looms
EP1256644A1 (en) * 2001-05-08 2002-11-13 Promatech S.p.A. Weft carrying gripper for weaving looms adjustable in respect of the thickness of the weft yarn

Also Published As

Publication number Publication date
TR23274A (en) 1989-08-10
ES543912A0 (en) 1986-06-01
DE3573004D1 (en) 1989-10-19
EP0164034B1 (en) 1989-09-13
IT1196138B (en) 1988-11-10
BR8502724A (en) 1986-02-12
EP0164034A3 (en) 1987-03-25
ATE46374T1 (en) 1989-09-15
ES8607434A1 (en) 1986-06-01
KR930000370B1 (en) 1993-01-16
HK34790A (en) 1990-05-11
JPH07857B2 (en) 1995-01-11
JPS6134249A (en) 1986-02-18
IT8421292A0 (en) 1984-06-07
IT8421292A1 (en) 1985-12-07
KR860000430A (en) 1986-01-28

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