EP1498524B1 - Electrically-controlled device for programmable weft cutting in weaving looms - Google Patents

Electrically-controlled device for programmable weft cutting in weaving looms Download PDF

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Publication number
EP1498524B1
EP1498524B1 EP04102442A EP04102442A EP1498524B1 EP 1498524 B1 EP1498524 B1 EP 1498524B1 EP 04102442 A EP04102442 A EP 04102442A EP 04102442 A EP04102442 A EP 04102442A EP 1498524 B1 EP1498524 B1 EP 1498524B1
Authority
EP
European Patent Office
Prior art keywords
weft
programmable
blades
electrically
motor
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.)
Revoked
Application number
EP04102442A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1498524A2 (en
EP1498524A3 (en
Inventor
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.)
Promatech SpA
Original Assignee
Promatech 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=33463056&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1498524(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Promatech SpA filed Critical Promatech SpA
Publication of EP1498524A2 publication Critical patent/EP1498524A2/en
Publication of EP1498524A3 publication Critical patent/EP1498524A3/en
Application granted granted Critical
Publication of EP1498524B1 publication Critical patent/EP1498524B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/70—Devices for cutting weft threads

Definitions

  • the present invention relates to an electrically-controlled device for programmable weft cutting in weaving looms.
  • gripper looms which are the ones where the range of woven yarns has widened the most, thanks to the introduction of electronic actuators capable of controlling the operation of the main members of the weaving machine according to the weaving parameters.
  • the weft selected by the presenting device is inserted into said looms, between the holding members of the carrying gripper, until it is locked.
  • the locking may occur also in a position which is more or less advanced in respect of the holding area of the gripper.
  • the cutting device operates in a point of the weft portion which is tensioned between the line of the false selvedge and the weft-holding member of the carrying gripper, while said gripper moves towards the inside of the shed.
  • the weft portion gripped by the holding member of the carrying gripper slides more or less markedly along the side of the holding member according to the size (count) and to the nature of the weft yarn.
  • the geometric layout taken on by the weft yarn in respect of the gripper is a function of the size features and of the textile nature of the weft yarn.
  • EP-0 679 744 discloses a weft yarn device comprising a first and second coaxial blade driven by an electric motor through cam means, wherein the axis of rotation of the first and second blade is inclined in respect to the feed direction of the fabric and in respect to the axis of rotation of said motor.
  • the present invention instead solves the problem in the most effective and satisfying way, by resorting to an original and innovative combination of the traditional control technique of the cutting device with the new concepts described above.
  • the weft cutting device of a gripper loom provides that the two blades thereof are driven by cam means operated by an electric motor which is programmable according both to the main motion of the loom, and to the textile features of the weft yarn.
  • said blades are carried by two oscillating arms and said cam means comprise two cams arranged side by side and mounted coaxially on the shaft of the programmable motor and relative cam followers on said arms.
  • said blade-mounting arms are mounted parallel and side by side, oscillating about the same axis, the shaft of the programmable motor and of the cams being parallel to the oscillating axis of the blade-mounting arms.
  • fig. 1 is a diagrammatic representation of the weft cutting device according to the invention, and of the application thereof to a gripper loom;
  • fig. 2 shows more in detail, in a perspective view, the weft cutting device according to the invention and the motor for the operation thereof.
  • the electrically-controlled device for the programmable cutting of the weft in gripper weaving looms comprises in a known manner two blades 1 and 2 to be operated at the time of insertion of the weft T - fed by one of the rods A of a presenting device - into the carrying gripper P of a weaving loom.
  • the two blades 1 and 2 of the device are carried by two corresponding arms 3 and 4, which are mounted parallel and side by side, oscillating about the same axis O.
  • cam followers 5 and 6 are provided, onto which two cams 7 and 8 act, mounted coaxially on the shaft 9A of a programmable electric motor 9.
  • This motor is electronically controlled according to the general motion of the loom and to the textile features of the weft yarn (weft count and yarn nature, among others), as is diagrammatically shown in fig. 1 .
  • the block 10 represents the hardware of the presenting device and comprises sensors of the position of the rods A presenting the weft T.
  • the block 11 manages the data concerning the general motion of the loom; furthermore, data relating to size (count) and nature of the yarn used as weft for the weaving are set therein.
  • the data originating from the block 10 and from the block 11 are transmitted to the block 12, which processes them to control the functioning of the motor 9 and to programme the instant in which the cutting blades 1 and 2 are operated to perform the cutting of the weft T.
  • the electrically-controlled device for programmable weft cutting in gripper weaving looms according to the invention is at the same time more effective, more compact and less expensive than those already devised, despite the more elaborate and consequently less foreseeable combination which distinguishes it therefrom.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Electrotherapy Devices (AREA)
  • Surgical Instruments (AREA)
EP04102442A 2003-07-17 2004-06-01 Electrically-controlled device for programmable weft cutting in weaving looms Revoked EP1498524B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT001464A ITMI20031464A1 (it) 2003-07-17 2003-07-17 Dispositivo a comando elettrico per il taglio programmabile
ITMI20031464 2003-07-17

Publications (3)

Publication Number Publication Date
EP1498524A2 EP1498524A2 (en) 2005-01-19
EP1498524A3 EP1498524A3 (en) 2005-11-16
EP1498524B1 true EP1498524B1 (en) 2009-07-22

Family

ID=33463056

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04102442A Revoked EP1498524B1 (en) 2003-07-17 2004-06-01 Electrically-controlled device for programmable weft cutting in weaving looms

Country Status (5)

Country Link
EP (1) EP1498524B1 (it)
AT (1) ATE437258T1 (it)
DE (1) DE602004022109D1 (it)
HK (1) HK1073339A1 (it)
IT (1) ITMI20031464A1 (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1017485A3 (nl) * 2007-03-08 2008-10-07 Picanol Nv Aandrijfsysteem voor een weefmachine.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH579165A5 (it) * 1974-06-28 1976-08-31 Rueti Ag Maschf
BE1000369A4 (nl) * 1987-03-09 1988-11-08 Picanol Nv Werkwijze voor het bevelen van een snijinrichting voor inslagdraden bij weefmachines en snijinrichting hiertoe aangewend.
JP2668579B2 (ja) * 1989-04-19 1997-10-27 津田駒工業株式会社 給糸カッターの駆動装置
IT1273168B (it) * 1994-04-29 1997-07-07 Panter Srl Dispositivo di taglio di trama per una macchina per tessere
DE59606236D1 (de) * 1996-10-07 2001-01-25 Sulzer Textil Ag Rueti Verfahren zum Abtrennen eines einzutragenen Schussfadens in einer Greiferwebmaschine
DE19713089C2 (de) * 1997-03-27 2000-07-27 Dornier Gmbh Lindauer Verfahren und Vorrichtung zur Steuerung und Überwachung der Schneidfunktion einer elektromotorisch angetriebenen Fadenschere in Webmaschinen
BE1011603A3 (nl) * 1997-12-11 1999-11-09 Picanol Nv Werkwijze en inrichting voor het controleren van een inslaginbreng bij een weefmachine.

Also Published As

Publication number Publication date
ITMI20031464A1 (it) 2005-01-18
HK1073339A1 (en) 2005-09-30
ATE437258T1 (de) 2009-08-15
EP1498524A2 (en) 2005-01-19
DE602004022109D1 (de) 2009-09-03
EP1498524A3 (en) 2005-11-16

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