EP0358934B1 - Paire de griffes pour métiers à tisser - Google Patents

Paire de griffes pour métiers à tisser Download PDF

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Publication number
EP0358934B1
EP0358934B1 EP89114553A EP89114553A EP0358934B1 EP 0358934 B1 EP0358934 B1 EP 0358934B1 EP 89114553 A EP89114553 A EP 89114553A EP 89114553 A EP89114553 A EP 89114553A EP 0358934 B1 EP0358934 B1 EP 0358934B1
Authority
EP
European Patent Office
Prior art keywords
grippers
weft
gripper
pair
bodies
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
EP89114553A
Other languages
German (de)
English (en)
Other versions
EP0358934A1 (fr
Inventor
Ettore Viscardi
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.)
Promatech SpA
Original Assignee
SOMET Societa Meccanica Tessile 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 SOMET Societa Meccanica Tessile SpA filed Critical SOMET Societa Meccanica Tessile SpA
Priority to AT89114553T priority Critical patent/ATE85369T1/de
Publication of EP0358934A1 publication Critical patent/EP0358934A1/fr
Application granted granted Critical
Publication of EP0358934B1 publication Critical patent/EP0358934B1/fr
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

Definitions

  • the present invention concerns a pair of grippers conveying the weft into the shed of a loom.
  • the patent FR-A-2048284 relates to a weft conveying system through positive grippers with particular reference to the opening and closing system of the grippers.
  • the Patent NL-A-7806084 instead relates to a weft conveying system through negative grippers with particular reference to the holding elements of the grippers.
  • the two grippers 1 and 2 are shown inside the shed of a loom in a substantially aligned position of mutual approach, just before weft yarn exchange. They are moved, in known manner, by straps 3 and 4 guided in the loom (of which, part of the sley C and of the reed P can be seen in fig. 3), also in known manner, by hook guide elements 5 and 6.
  • the drawing shows the weft yarn f to be conveyed through the shed, coming from the loom feeding means (not shown) and with its free leading end 7, cut in the previous cycle.
  • the yarn f is retained in 8 into the carrying gripper 1 by a lever 9 fulcrumed onto the gripper body and pressed by a spring against an elastic plate 10.
  • the yarn f is stretched between the retention point 8 and a guiding point 11 of the warp guard 12 of the gripper 1.
  • point 11 is released the reaction pull T to the force of inertia between the gripper and the weft feeding means.
  • the front hook part 13 of the drawing gripper 2 moves to the side of the front part of the gripper 1 retaining the yarn f and penetrates between the same and the warp guard 12; at the same time, the length of weft yarn f stretched between points 8 and 11 has to move beyond the surface 13A of the hook 13 of the gripper 2 in order to penetrate into the retaining wedge 14 thereof.
  • the yarn f is efficiently retained in 15 in the drawing gripper which, after having reversed its motion, can thus convey it to the end of the loom opposite to the weft feeding end.
  • the invention provides to form a certain angle ⁇ between the retention surfaces of the two grippers.
  • both bodies of the grippers 1 and 2 are formed outwardly inclined to an equal extent (fig. 3) in respect of the plane N perpendicular to the sliding surface 0 of the bases 1A and 2A thereof and of the straps 3 and 4 onto the sley.
  • This solution (clearly illustrated in fig. 3 of the drawing) allows to obtain, according to the invention, a distance between the yarn retention points 8 and 15 in the two grippers 1 and 2 which is almost equal to the distance between the retention point 15 in the drawing gripper 2 and the guiding point 11 on the warp guard of the carrying gripper 1, onto which is released the tension of the yarn; this allows to make the best use of the elastic characteristics of the weft.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (2)

  1. Paire de griffes de trame (1, 2) pour métiers à tisser, du type comportant des corps dont la base (1A, 2A) est reliée fixement aux bandes (3, 4) provoquant leur mouvement, caractérisée en ce que les corps des deux griffes (1, 2) sont inclinés vers l'extérieur relativement au plan N perpendiculaire à la surface de glissement (0) des bases (1A, 2A) desdits corps et desdites bandes (3, 4).
  2. Paire de griffes de trame selon la revendication 1, dans laquelle les corps des deux griffes ont la même inclinaison relativement audit plan.
EP89114553A 1988-09-12 1989-08-07 Paire de griffes pour métiers à tisser Expired - Lifetime EP0358934B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89114553T ATE85369T1 (de) 1988-09-12 1989-08-07 Greiferpaar fuer webmaschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2190188 1988-09-12
IT8821901A IT1227339B (it) 1988-09-12 1988-09-12 Coppia di pinze di trasporto della trama per telai di tessitura

Publications (2)

Publication Number Publication Date
EP0358934A1 EP0358934A1 (fr) 1990-03-21
EP0358934B1 true EP0358934B1 (fr) 1993-02-03

Family

ID=11188462

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89114553A Expired - Lifetime EP0358934B1 (fr) 1988-09-12 1989-08-07 Paire de griffes pour métiers à tisser

Country Status (4)

Country Link
EP (1) EP0358934B1 (fr)
AT (1) ATE85369T1 (fr)
DE (1) DE68904715T2 (fr)
IT (1) IT1227339B (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2048284A5 (en) * 1969-12-17 1971-03-19 Dornier Gmbh Lindauer Shuttleless weaving loom
CH616713A5 (fr) * 1977-06-09 1980-04-15 Albatex Ag

Also Published As

Publication number Publication date
IT1227339B (it) 1991-04-08
DE68904715T2 (de) 1993-08-05
EP0358934A1 (fr) 1990-03-21
ATE85369T1 (de) 1993-02-15
DE68904715D1 (de) 1993-03-18
IT8821901A0 (it) 1988-09-12

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