EP1098021A1 - Positive yarn feeder for circular knitting machines - Google Patents

Positive yarn feeder for circular knitting machines Download PDF

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Publication number
EP1098021A1
EP1098021A1 EP00830691A EP00830691A EP1098021A1 EP 1098021 A1 EP1098021 A1 EP 1098021A1 EP 00830691 A EP00830691 A EP 00830691A EP 00830691 A EP00830691 A EP 00830691A EP 1098021 A1 EP1098021 A1 EP 1098021A1
Authority
EP
European Patent Office
Prior art keywords
yarn
circular knitting
servomechanism
machine
knitting machine
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.)
Withdrawn
Application number
EP00830691A
Other languages
German (de)
English (en)
French (fr)
Inventor
Fulvio Sangiacomo
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.)
Sangiacomo SpA
Original Assignee
Sangiacomo 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 Sangiacomo SpA filed Critical Sangiacomo SpA
Publication of EP1098021A1 publication Critical patent/EP1098021A1/en
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/48—Thread-feeding devices

Definitions

  • the present invention pertains to the field of circular knitting machines and, in particular, it pertains to yarn feeders in such machines.
  • Yarn feeders for circular knitting machines having the function of adjusting the amount and the tension of each yam supplied to a machine have already become known.
  • the difficulty, which also represents a problem, of such feeders is "feeling" the variations in the knitted article or of the types of knitted article involving a different yarn take-up and/or a different knitting speed, even if within the framework of the same rotation, and of temporarily intervening in order to readjust the tension of the yarn fed in.
  • Such feeders are rather passive and have a poor sensitivity to the tension of the yarn and a remarkable inertia in intervening to restore the optimal conditions of supplying yam to the machine, which may have a negative effect on the uniformity and quality of the knitted product especially if the variations are repeated frequently.
  • the object of the present invention is to solve such a problem and to eliminate the implicit drawbacks with an improved yarn feeder which is predisposed to be ready to intervene positively in any variation in the demand and tension of the yarn due to the change in the type of knitwear during the performance and/or in the manufacturing speed.
  • the object is accomplished, according to the present invention, with a positive feeder, which is controlled by a servomechanism that can be programmed and operated by the control electronics of the knitting machine to be ready to intervene in response to the demands for yarn by the machine, appropriately adjusting the tension of the yam.
  • the invention involves creating an interface between the machine and the yarn feeding devices so that it is possible to inform, in advance, the feeder of the yam of the need of the machine to make sure that the tension of the yarn remains within the preselected parameters.
  • the invention comprises a yarn feeder indicated by 11, which is actuated by a servomechanism 12.
  • the servomechanism 12 is operated by a programmer 13 controlled by electronics 14.
  • the electronics 14 is responsible for the control of a circular knitting machine.
  • the structure of the yarn feeder 11 is known in itself.
  • the method the yarn feeder uses of supplying yarn to the machine to be fed is also known.
  • the servomechanism 12 may consist of an electric motor with variable speed in response to signals coming from the programmer 13. The signals may indicate the variations of supply and/or tension of the yarn directed to the knitting machine.
  • the feeder becomes active in the sense that, with each variation of the knitwear being produced on the knitting machine according to a specific program, the feeder proper is programmed correspondingly and is controlled to intervene positively, without delays and inertia, to always keep the tension of the yarn uniform.
  • the interface between machine and each feeder device is, e.g., created with mixed analog-digital technology. This is because the selection is made for an analog speed reference in order to inform the feeder of the yarn of the exact instantaneous speed of the machine, and a digital system reference, which makes it possible for the machine software to inform, in advance, the feeder of the yarn to make it possible for the yarn feeder to operate at a speed in time to satisfy the textile requirements of the machine.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Feeding Of Articles To Conveyors (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
EP00830691A 1999-11-03 2000-10-23 Positive yarn feeder for circular knitting machines Withdrawn EP1098021A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1999BS000104A IT1310075B1 (it) 1999-11-03 1999-11-03 Alimentatore positivo di filo per macchine circolari da maglieria.
ITBS990104 1999-11-03

Publications (1)

Publication Number Publication Date
EP1098021A1 true EP1098021A1 (en) 2001-05-09

Family

ID=11346468

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00830691A Withdrawn EP1098021A1 (en) 1999-11-03 2000-10-23 Positive yarn feeder for circular knitting machines

Country Status (2)

Country Link
EP (1) EP1098021A1 (it)
IT (1) IT1310075B1 (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2218809B1 (en) 2002-05-03 2018-10-03 Tiziano Barea Method and system for the constant-tension yarn feed or a take-up of a yarn fed to a textile machine, and a textile machine using same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3002311A1 (de) * 1980-01-23 1981-07-30 Textilmaschinenfabrik Harry Lucas GmbH & Co KG, 2350 Neumünster Rundstrick-strumpfmaschine zur herstellung von gummistruempfen
EP0161853A1 (en) * 1984-04-26 1985-11-21 Iro (Uk) Ltd. Positive yarn feed
EP0489307A1 (en) * 1990-12-04 1992-06-10 INTERNATIONAL TRADING S.r.l. Method and device for automatically controlling the quantity of yarn fed to a textile machine operating discontinuously thereon
DE19756484A1 (de) * 1997-12-18 1999-06-24 Cetex Chemnitzer Textilmaschin Verfahren zur bedarfsgerechten Lieferung von Fadenmaterial
EP0950742A2 (en) * 1998-04-17 1999-10-20 B.T.S.R. International S.p.A. Device for controlling yarn feed to a textile machine and method for controlling the machine operation and production

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3002311A1 (de) * 1980-01-23 1981-07-30 Textilmaschinenfabrik Harry Lucas GmbH & Co KG, 2350 Neumünster Rundstrick-strumpfmaschine zur herstellung von gummistruempfen
EP0161853A1 (en) * 1984-04-26 1985-11-21 Iro (Uk) Ltd. Positive yarn feed
EP0489307A1 (en) * 1990-12-04 1992-06-10 INTERNATIONAL TRADING S.r.l. Method and device for automatically controlling the quantity of yarn fed to a textile machine operating discontinuously thereon
DE19756484A1 (de) * 1997-12-18 1999-06-24 Cetex Chemnitzer Textilmaschin Verfahren zur bedarfsgerechten Lieferung von Fadenmaterial
EP0950742A2 (en) * 1998-04-17 1999-10-20 B.T.S.R. International S.p.A. Device for controlling yarn feed to a textile machine and method for controlling the machine operation and production

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2218809B1 (en) 2002-05-03 2018-10-03 Tiziano Barea Method and system for the constant-tension yarn feed or a take-up of a yarn fed to a textile machine, and a textile machine using same

Also Published As

Publication number Publication date
IT1310075B1 (it) 2002-02-05
ITBS990104A1 (it) 2001-05-03
ITBS990104A0 (it) 1999-11-03

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