EP0412453B1 - Ruban pour aiguille avec épaisseur variable pour métiers à aiguilles - Google Patents

Ruban pour aiguille avec épaisseur variable pour métiers à aiguilles Download PDF

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Publication number
EP0412453B1
EP0412453B1 EP90114955A EP90114955A EP0412453B1 EP 0412453 B1 EP0412453 B1 EP 0412453B1 EP 90114955 A EP90114955 A EP 90114955A EP 90114955 A EP90114955 A EP 90114955A EP 0412453 B1 EP0412453 B1 EP 0412453B1
Authority
EP
European Patent Office
Prior art keywords
strap
gripper
thickness
section
area
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
EP90114955A
Other languages
German (de)
English (en)
Other versions
EP0412453A1 (fr
Inventor
Luigi Pezzoli
Giuseppe Casarotto
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.)
NUOVA VAMATEX SpA
Original Assignee
NUOVA VAMATEX SpA
Vamatex Nuova 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 NUOVA VAMATEX SpA, Vamatex Nuova SpA filed Critical NUOVA VAMATEX SpA
Publication of EP0412453A1 publication Critical patent/EP0412453A1/fr
Application granted granted Critical
Publication of EP0412453B1 publication Critical patent/EP0412453B1/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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/275—Drive mechanisms
    • D03D47/276—Details or arrangement of sprocket wheels
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/271—Rapiers
    • D03D47/272—Rapier bands
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms

Definitions

  • the present invention concerns improvements in gripper straps for gripper looms, that is, in the straps which control the motion of the grippers and thus of the weft yarns through the shed of modern looms.
  • the EP-A-0 102 588 has already supplied a solution to the problem of varying the stiffness of gripper straps along their length: this solution consists in incorporating into a conventional strap of normal stiffness a core or lining of variable thickness and/or width along the strap length.
  • the straps used for this system are in fact particularly rigid because of their ribbed section with great overall thickness (required to form said recess and allow proper engagement with said guides and precise guiding of the gripper at the centre of the shed). Similar situations can besides arise also with other types and arrangements of gripper straps.
  • the strap is of the type moved by a toothed wheel with reciprocating motion, the teeth of which engage into notches formed along said strap, the distance between said notches in the strap according to the invention can be varied according to the position taken up therein by the neutral bending axis.
  • the gripper strap according to the invention is of the type having longitudinal stiffening ribs, and its thickness will advantageously be reduced only in correspondence of said longitudinal ribs, as far as causing the end of the strap opposite to that carrying the gripper to take up a flat rectangular shape.
  • the decrease in thickness of the strap can be continuous and uniform or, alternatively, discontinuous by steps, along the length of the strap. It can furthermore be uniform, or not uniform, across the width of the strap, giving rise to symmetrical or asymmetrical sections, according to cases.
  • the gripper strap according to the invention has the following cross section: a channel or C section whose flanges forming said ribs have a constant thickness in the area of the strap end carrying the gripper; a channel or C section whose flanges forming said ribs have a gradually decreasing thickness in an area adjacent to the previous one and extending therefrom; and a rectangular or T section in the area of the strap end opposite to that carrying the gripper.
  • the gripper strap N carrying the gripper P through the warp shed of the loom T, has to be particularly flexible in correspondence of its part caused to adhere - by conventional guide means P1 and P2 - to the wheel R controlling its motion, the teeth of which engage into its notches.
  • this is obtained - in the case of particularly rigid straps - by gradually reducing the thickness of the strap over at least part of its section, starting from an area 2 close to the end 3 carrying the gripper and extending towards the opposite end 4.
  • the strap N according to the invention is of the type with channel section, having lateral longitudinal stiffening ribs 1, for the gripper to be properly guided at the centre of the shed.
  • the configuration of the strap N shown in figs. 2 to 5 is such that only the ribs 1 are gradually and evenly reduced in thickness, so as to be totally eliminated in correspondence of its end 4, while the remaining part of the strap N keeps its thickness unvaried.
  • Said strap end 4 thus takes up a perfectly rectangular and relatively thin symmetrical section (fig. 5), which is fully apt to guarantee a high flexibility of the strap in this area. In the adjacent areas the flexibility will be similar, while the strap will then gradually stiffen towards its end 3 carrying the gripper, taking up its maximum thickness between said end 3 and the area 2 from which the ribs 1 start to grow thinner.
  • a gripper strap similar to that shown in figs. 2 to 5, is illustrated in figs. 6 to 10: the only difference in respect of the previous embodiment is that the thickness of this strap varies discontinuously, by steps, along its full length.
  • a first length 5 of maximum uniform thickness in correspondence of the end area carrying the gripper (its cross section is shown in fig. 8), is followed - between points 6 and 7 - by a length 8 of reduced thickness of the ribs 1 (cross section shown in fig. 9) and then - beyond point 7 - by a final length 9 wherein the ribs 1 are eliminated and the strap takes up a thin rectangular section (fig. 10).
  • the strap always keeps a symmetrical cross section.
  • the ribs 1 of the strap are again gradually and evenly reduced in thickness, but said reduction is more pronounced - in respect of the strap embodiment of figs. 2 to 5 - whereby the strap end 10, opposite to the end 3 carrying the gripper, takes up a T section, as shown in fig. 14.
  • the cross section is perfectly symmetrical. It could however be provided for the strap - having a ribbed or non-ribbed section - to be unevenly reduced in thickness across its width, in which case, the cross section of the strap would be asymmetrical.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Knitting Machines (AREA)
  • Belt Conveyors (AREA)
  • Clamps And Clips (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Manipulator (AREA)

Claims (11)

  1. Ruban (N) de pince pour métiers (T) à pinces, caractérisé en ce qu'au moins une partie de sa section transversale est diminuée progressivement d'épaisseur en partant d'une zone (2) proche de l'extrémité (3) supportant la pince et s'étendant vers l'extrémité opposée (4).
  2. Ruban (N) de pince selon la revendication 1, dans lequel la diminution d'épaisseur est continue et uniforme sur la longueur du ruban (N).
  3. Ruban (N) de pince selon la revendication 1, dans lequel la diminution d'épaisseur est discontinue, se faisant par paliers, sur la longueur du ruban (N).
  4. Ruban (N) de pince selon la revendication 1, dans lequel la diminution d'épaisseur est uniforme sur la largeur du ruban (N).
  5. Ruban (N) de pince selon la revendication 1, du type déplacé par une roue dentée avec va-et-vient, dont les dents s'engagent dans des encoches (11) formées le long du ruban, caractérisé en ce que la distance entre lesdites encoches (11) dans le ruban (N) est variable selon la position adoptée par l'axe de flexion neutre.
  6. Ruban (N) de pince pour métiers à pinces, du type comportant des nervures raidisseuses longitudinales (1), caractérisé en ce que l'épaisseur du ruban (N) est progressivement réduite le long desdites nervures longitudinales (1), en partant d'une zone (2) proche de l'extrémité (3) supportant la pince et s'étendant vers l'extrémité opposée (4).
  7. Ruban (N) de pince selon la revendication 6, dans lequel la diminution d'épaisseur est continue et uniforme sur la longueur du ruban (N).
  8. Ruban (N) de pince selon la revendication 6, dans lequel la diminution d'épaisseur est discontinue, se faisant par paliers, sur la longueur du ruban (N).
  9. Ruban (N) de pince selon la revendication 6, dans lequel la diminution d'épaisseur est uniforme sur la largeur du ruban (N).
  10. Ruban (N) de pince selon la revendication 6, comportant une section en U ou en C dont les rebords formant lesdites nervures (1) ont une épaisseur constante dans la zone de l'extrémité (3) du ruban supportant la pince; une section en U ou en C dont les rebords formant lesdites nervures (1) ont une épaisseur réduite progressivement dans une zone adjacente à la zone précédente et s'étendant depuis celle-ci; et une section rectangulaire dans la zone de l'extrémité (4) du ruban opposée à l'extrémité supportant la pince.
  11. Ruban (N) de pince selon la revendication 6, comportant une section en U ou en C dont les rebords formant lesdites nervures (1) ont une épaisseur constante dans la zone de l'extrémité (3) du ruban supportant la pince; une section en U ou en C avec des rebords d'épaisseur décroissante, suivie d'une section rectangulaire puis d'une section en T, dans une zone adjacente à la zone précédente et s'étendant depuis celle-ci; et une section en T dans la zone de l'extrémité (4) du ruban opposée à l'extrémité supportant la pince.
EP90114955A 1989-08-09 1990-08-03 Ruban pour aiguille avec épaisseur variable pour métiers à aiguilles Expired - Lifetime EP0412453B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8921482A IT1230810B (it) 1989-08-09 1989-08-09 Nastro portapinza a spessore variabile per telai di tessitura a pinze.
IT2148289 1989-08-09

Publications (2)

Publication Number Publication Date
EP0412453A1 EP0412453A1 (fr) 1991-02-13
EP0412453B1 true EP0412453B1 (fr) 1994-05-18

Family

ID=11182488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90114955A Expired - Lifetime EP0412453B1 (fr) 1989-08-09 1990-08-03 Ruban pour aiguille avec épaisseur variable pour métiers à aiguilles

Country Status (12)

Country Link
EP (1) EP0412453B1 (fr)
JP (1) JP2937434B2 (fr)
KR (1) KR970008885B1 (fr)
CN (1) CN1023331C (fr)
AT (1) ATE105879T1 (fr)
BR (1) BR9003888A (fr)
CZ (1) CZ281780B6 (fr)
DE (1) DE69008968T2 (fr)
DK (1) DK0412453T3 (fr)
ES (1) ES2056318T3 (fr)
IT (1) IT1230810B (fr)
SK (1) SK279146B6 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10716912B2 (en) 2015-03-31 2020-07-21 Fisher & Paykel Healthcare Limited User interface and system for supplying gases to an airway
US11324908B2 (en) 2016-08-11 2022-05-10 Fisher & Paykel Healthcare Limited Collapsible conduit, patient interface and headgear connector

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09176934A (ja) * 1995-12-27 1997-07-08 Toyota Autom Loom Works Ltd レピア織機に用いるスプロケットホイール及びレピアバンド並びにレピア織機における緯入れ装置
BE1022754B1 (nl) * 2015-02-26 2016-08-30 Picanol Nv Geleidingsinrichting voor een lans voor een grijperweefmachine
BE1024494B1 (nl) * 2016-08-11 2018-03-12 Picanol Naamloze Vennootschap Grijperband en grijpereenheid voor een grijperweefmachine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL89639C (fr) *
BE658330A (fr) * 1964-01-17 1900-01-01
DE2030433A1 (en) * 1970-06-20 1971-12-30 Fa. Hermann Wangner, 7410 Reutlingen Weft lance - with bowed steel spring stiffners
DE2902729C2 (de) * 1979-01-25 1982-04-01 Lindauer Dornier Gmbh, 8990 Lindau Schußfadeneintragorgan für schützenlose Webmaschinen
IT1210932B (it) * 1982-09-03 1989-09-29 Omv Off Mecc Vilminore Nastro di comando di pinze portatrama in telai di tessitura avente rigidita' variabile.
IT8521893V0 (it) * 1985-05-22 1985-05-22 Lamiflex Srl Struttura di nastro per telai senza navetta.
IT1198246B (it) * 1986-12-23 1988-12-21 Vamatex Spa Mezzi per guidare il moto di una coppia di pinze portatrama all'interno del passo di telai di tessitura

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10716912B2 (en) 2015-03-31 2020-07-21 Fisher & Paykel Healthcare Limited User interface and system for supplying gases to an airway
US11904097B2 (en) 2015-03-31 2024-02-20 Fisher & Paykel Healthcare Limited User interface and system for supplying gases to an airway
US11324908B2 (en) 2016-08-11 2022-05-10 Fisher & Paykel Healthcare Limited Collapsible conduit, patient interface and headgear connector

Also Published As

Publication number Publication date
DK0412453T3 (da) 1994-10-03
BR9003888A (pt) 1991-09-03
ATE105879T1 (de) 1994-06-15
IT1230810B (it) 1991-10-29
DE69008968T2 (de) 1994-09-15
CN1023331C (zh) 1993-12-29
IT8921482A0 (it) 1989-08-09
ES2056318T3 (es) 1994-10-01
EP0412453A1 (fr) 1991-02-13
SK279146B6 (sk) 1998-07-08
CN1049878A (zh) 1991-03-13
CS9003934A2 (en) 1991-12-17
JPH03137247A (ja) 1991-06-11
KR970008885B1 (en) 1997-05-30
KR910004867A (ko) 1991-03-29
JP2937434B2 (ja) 1999-08-23
CZ281780B6 (cs) 1997-01-15
DE69008968D1 (de) 1994-06-23

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