EP0426030A2 - Procédé et dispositif pour la fabrication de dessins aux chaussettes aux métiers à tricoter circulaires à deux cylindres - Google Patents

Procédé et dispositif pour la fabrication de dessins aux chaussettes aux métiers à tricoter circulaires à deux cylindres Download PDF

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Publication number
EP0426030A2
EP0426030A2 EP90120580A EP90120580A EP0426030A2 EP 0426030 A2 EP0426030 A2 EP 0426030A2 EP 90120580 A EP90120580 A EP 90120580A EP 90120580 A EP90120580 A EP 90120580A EP 0426030 A2 EP0426030 A2 EP 0426030A2
Authority
EP
European Patent Office
Prior art keywords
thread
pattern
needles
feed
knit
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Withdrawn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
EP90120580A
Other languages
German (de)
English (en)
Other versions
EP0426030A3 (en
Inventor
Francesco Lonati
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.)
Lonati SpA
Original Assignee
Lonati 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 Lonati SpA filed Critical Lonati SpA
Publication of EP0426030A2 publication Critical patent/EP0426030A2/fr
Publication of EP0426030A3 publication Critical patent/EP0426030A3/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Withdrawn legal-status Critical Current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
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/26—Circular knitting machines with independently-movable needles for producing patterned fabrics
    • D04B9/28—Circular knitting machines with independently-movable needles for producing patterned fabrics with colour patterns

Definitions

  • the present invention relates to a process and device for producing patterns on stockings with double-cylinder circular knitting machines.
  • patterns on socks or stockings produced with double-cylinder circular knitting machines are provided by means of hand-made embroidery or by sewing the ornamental pattern on the sock or stocking or by printing.
  • the patterns are generally produced directly by the machine during the forming of the sock or stocking by feeding a preset number of needles with a thread which differs in color with respect to the thread which constitutes the remaining part of the sock or stocking, i.e. the background of the pattern.
  • the thread is cut by a rotary saw which is arranged coaxially to the needle cylinder in the needle work area.
  • the aim of the present invention is to solve the above described problem by providing a process which allows, in a simple manner, to produce patterns, with a thread which differs in color with respect to the remaining part of the sock or stocking, on socks or stockings directly during their formation on double-cylinder machines.
  • an object of the invention is to provide a process for producing patterns on socks or stockings with double-cylinder circular knitting machines even for patterns which affect a very small number of stitches of knitting, eliminating the risk of ladders on the finished sock or stocking.
  • Another object of the invention is to provide a process which allows to obtain patterns with a good degree of finish.
  • a further object of the invention is to provide a process which does not excessively penalize the productive potentiality of modern double-cylinder machines.
  • Still another object of the invention is to provide a device which allows to carry out the process according to the invention and which can be installed without problems on a wide range of conventional double-cylinder machines.
  • a process for producing patterns on stockings with double-cylinder circular knitting machines characterized in that it consists in: moving all the needles of the machine into the lower needle cylinder before forming of the pattern begins; moving a preset number of needles to knit at a feed of the machine to engage at least one pattern thread which differs in color with respect to the background thread used to form the region of the sock or stocking which is proximate to the pattern, so as to obtain a first portion of pattern on a row of the sock or stocking; tensioning and progressively recovering said pattern thread engaged on the last needle moved to knit at said feed during the rotation of the lower needle cylinder about its axis; feeding said pattern thread again to the same needles, or to contiguous needles, moved to knit at said feed to form a new portion of the pattern row; cutting said pattern thread at the end of the forming of the pattern.
  • the process according to the invention can be easily performed by appropriately programming a known double-­cylinder machine equipped with a device which is characterized in that it comprises a thread guide arranged proximate to a feed of the machine and an element for tensioning and recovering the thread fed by said thread guide upon the slackening of said thread.
  • the process according to the invention consists in moving, prior to the production of the first row of knitting affected by the pattern, all the needles into the lower needle cylinder 1. Upstream of a feed 2 of the machine, a selection of the needles is performed so as to move to knit, i.e. engage the thread 3 fed to this feed, only a preset number of needles 4 according to the width of the portion of row being formed which is to be occupied by the pattern. A thread 3 of a different color with respect to the thread 5 used for the knitting of the remaining part of the sock or stocking which constitutes the background of the pattern is fed to the needles 4 at the feed 2.
  • the thread 3 During rotation of the lower needle cylinder 1 about its axis 1a, the thread 3 remains engaged with the last of the needles which have been moved to knit at the feed 2. The feeding of the thread 3 continues during the fraction of turn of the cylinder 1 which moves the needles away from the feed 2, but when the needles 4 move again toward the feed 2 in the subsequent fraction of turn, the thread 3 is kept under tension and is progressively recovered so as to avoid interferences with the other elements of the machine.
  • the last stitch of the pattern portion of the preceding row is connected to the first stitch of the pattern portion of the subsequent row by a portion 3a of thread on the reverse side of the knitting.
  • the thread 3 is cut in a known manner, for example by means of a conventional clamping and cutting device.
  • the remaining part of the sock or stocking is formed without problems with the thread 5 fed at another feed of the machine which is angularly spaced from the feed 2 with respect to the axis 1a of the lower needle cylinder.
  • the needles intended to engage the pattern thread 3 at the feed 2, or at least some of said needles, do not engage the thread 5 at the related feed, and said thread 5 remains floating on the side of the needles which is directed toward the axis la of the lower needle cylinder.
  • the needles intended to perform said interweaving are moved to also knit at the feed which dispenses the thread 5 so as to engage both threads 3 and 5 (figure 10).
  • a known thread guide 10 is used to perform the process according to the invention; said thread guide is arranged with its feed end 10a at a feed of the machine, and the thread 3 for forming the pattern is fed through it. Said thread guide 10 is fitted with an element 11 for tensioning and recovering the fed thread 3 when slackening thereof occurs.
  • the tensioning element 11 is substantially constituted by an arm 12 which is hinged, at an intermediate portion thereof, to a supporting frame 13 so that an end 12a of said arm 12, at which a passage 14 for the thread 3 is defined upstream of the end 10a of the thread guide 10, can move closer or away from said end 10a.
  • Elastic means two springs 15 and 16 in the illustrated case, act on the arm 12 to bias the motion of the end 12a toward the feed end 10a of the thread guide 10.
  • Means 17 for locking the arm 12 in its position of maximum approach to the feed end 10a of the thread guide 10 are furthermore mounted on the supporting frame 13.
  • Said locking means 17 are substantially constituted by a movable shoulder 18 which can be controllably moved by means of a double-action pneumatic cylinder 19 mounted on the supporting frame 13.
  • the shoulder 18 is movable from a locking position, in which it hinders the oscillation of the arm 12 away from the feed end 10a of the thread guide, to a release position in which it does not interfere with the oscillation of the arm 12.
  • the shoulder 18 When the pattern is not produced, the shoulder 18 is kept in locking position (figure 6). When the knitting of the pattern begins, the shoulder 18 is moved to the release position (figure 7) by virtue of the actuation of the pneumatic cylinder 19. While the needles which form the pattern move away from the thread guide 10 due to the rotation of the lower needle cylinder, the tension to which the thread 3 is subjected keeps the arm 12 close to the end 10a of the thread guide, overcoming the force exerted thereon by the springs 15 and 16.
  • the thread which is knitted to form the pattern is cut only at the end of the pattern, it is furthermore possible to produce patterns which affect a small number of needles without accidental unthreadings of the thread.
  • the materials employed, as well as the dimensions, may be any according to the requirements and to the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Socks And Pantyhose (AREA)
EP19900120580 1989-11-03 1990-10-26 Process and device for producing patterns on stockings with double-cylinder circular knitting machines Withdrawn EP0426030A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2226089 1989-11-03
IT02226089A IT1237120B (it) 1989-11-03 1989-11-03 Procedimento per l'esecuzione di disegni su calze con macchine circolari a doppio cilindro e dispositivo per la sua attuazione

Publications (2)

Publication Number Publication Date
EP0426030A2 true EP0426030A2 (fr) 1991-05-08
EP0426030A3 EP0426030A3 (en) 1992-08-12

Family

ID=11193797

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900120580 Withdrawn EP0426030A3 (en) 1989-11-03 1990-10-26 Process and device for producing patterns on stockings with double-cylinder circular knitting machines

Country Status (4)

Country Link
EP (1) EP0426030A3 (fr)
JP (1) JPH03152250A (fr)
CS (1) CS516690A2 (fr)
IT (1) IT1237120B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5224361A (en) * 1991-06-07 1993-07-06 Uniplet A.S. Thread cutter for double-cylinder circular knitting machines
EP0962569A2 (fr) * 1998-06-03 1999-12-08 MATEC S.p.A. Métier à tricoter circulaire à grand adaptabilité pour bas et similaires avec multiples systèmes ou alimentations
CZ299171B6 (cs) * 2002-02-05 2008-05-07 Uniplet Trebíc, A. S. Zpusob pletení pocátku úpletu
CN107956033A (zh) * 2017-11-24 2018-04-24 新昌县振兴纺织机械有限公司 一种织袜机给纱装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE462955C (de) * 1926-08-22 1928-07-19 Schubert & Salzer Maschinen Strumpf mit Scheinnaht
DE462954C (de) * 1928-07-23 Schubert & Salzer Maschinen Verfahren zur Herstellung einer nachgeahmten Naht an Struempfen
GB2058861A (en) * 1979-09-19 1981-04-15 Irmac Spa Stocking of Patterned Knitting, Executed by Stitch Transfer (Open- work), with Coloured Design Effects
US4328686A (en) * 1980-05-12 1982-05-11 Speizman Industries, Inc. Auxiliary yarn feed finger and pattern drum sleeve for circular knitting machines and method of knitting therewith

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52121557A (en) * 1976-04-01 1977-10-13 Toyo Boseki Method and device for automatically controlling stitch length
JPS58135066A (ja) * 1982-02-05 1983-08-11 Fukuhara Seiki Seisakusho:Kk 編機における積極型の糸送り装置
JPS59165487A (ja) * 1983-03-09 1984-09-18 Sharp Corp 半導体レ−ザアレイ素子

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE462954C (de) * 1928-07-23 Schubert & Salzer Maschinen Verfahren zur Herstellung einer nachgeahmten Naht an Struempfen
DE462955C (de) * 1926-08-22 1928-07-19 Schubert & Salzer Maschinen Strumpf mit Scheinnaht
GB2058861A (en) * 1979-09-19 1981-04-15 Irmac Spa Stocking of Patterned Knitting, Executed by Stitch Transfer (Open- work), with Coloured Design Effects
US4328686A (en) * 1980-05-12 1982-05-11 Speizman Industries, Inc. Auxiliary yarn feed finger and pattern drum sleeve for circular knitting machines and method of knitting therewith

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5224361A (en) * 1991-06-07 1993-07-06 Uniplet A.S. Thread cutter for double-cylinder circular knitting machines
EP0962569A2 (fr) * 1998-06-03 1999-12-08 MATEC S.p.A. Métier à tricoter circulaire à grand adaptabilité pour bas et similaires avec multiples systèmes ou alimentations
EP0962569A3 (fr) * 1998-06-03 2002-05-02 MATEC S.p.A. Métier à tricoter circulaire à grand adaptabilité pour bas et similaires avec multiples systèmes ou alimentations
CZ299171B6 (cs) * 2002-02-05 2008-05-07 Uniplet Trebíc, A. S. Zpusob pletení pocátku úpletu
CN107956033A (zh) * 2017-11-24 2018-04-24 新昌县振兴纺织机械有限公司 一种织袜机给纱装置
CN107956033B (zh) * 2017-11-24 2023-11-14 浙江专博纺织机械有限公司 一种织袜机给纱装置

Also Published As

Publication number Publication date
EP0426030A3 (en) 1992-08-12
IT1237120B (it) 1993-05-18
IT8922260A1 (it) 1991-05-03
JPH03152250A (ja) 1991-06-28
IT8922260A0 (it) 1989-11-03
CS516690A2 (en) 1991-06-11

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