EP0741201A2 - Verbesserung an einer Cotton-Flachwirkmaschine - Google Patents

Verbesserung an einer Cotton-Flachwirkmaschine Download PDF

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Publication number
EP0741201A2
EP0741201A2 EP96106932A EP96106932A EP0741201A2 EP 0741201 A2 EP0741201 A2 EP 0741201A2 EP 96106932 A EP96106932 A EP 96106932A EP 96106932 A EP96106932 A EP 96106932A EP 0741201 A2 EP0741201 A2 EP 0741201A2
Authority
EP
European Patent Office
Prior art keywords
sinkers
needles
end portion
recess
tab
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.)
Granted
Application number
EP96106932A
Other languages
English (en)
French (fr)
Other versions
EP0741201A3 (de
EP0741201B1 (de
Inventor
Alfio Casadio
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.)
TECNOTESSILE Srl
Original Assignee
TECNOTESSILE Srl
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 TECNOTESSILE Srl filed Critical TECNOTESSILE Srl
Publication of EP0741201A2 publication Critical patent/EP0741201A2/de
Publication of EP0741201A3 publication Critical patent/EP0741201A3/de
Application granted granted Critical
Publication of EP0741201B1 publication Critical patent/EP0741201B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D04B15/06—Sinkers
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B11/00—Straight-bar knitting machines with fixed needles
    • D04B11/02—Straight-bar knitting machines with fixed needles with one set of needles

Definitions

  • the present invention relates to an improvement to a Cotton loom.
  • collector bar which is actuated with a composite motion that comprises a vertical and a horizontal components.
  • a principal aim of the present invention is to improve a Cotton loom so as to eliminate the presence of the lowering sinker bar and therefore of all the kinematic elements that control its movements, so as to provide a considerable constructive simplification that advantageously affects the purchase costs of a Cotton loom and the maintenance and tuning operations.
  • a Cotton loom having a beam and a plurality of sinkers, characterized in that the sinkers have, below their end portion (beak), a tab protruding forwards beyond the end of the end portion and forming a recess together with said end of the end portion, said sinkers being actuated so as to perform an advancing motion to distribute the thread among the needles, a retracting motion combined with the descent of the needles so as to form a row and deposit it on said tab, and a subsequent advancing motion so as to cause the lowering of the row inside said recess.
  • the reference numeral 1 designates the longitudinal beam of a Cotton loom.
  • the beam 1 has an L-shaped cross-section, and the sinker bar 2 is fixed to the top of the vertical wing of the beam 1; hereinafter, for reasons of clarity in description, said bar will be termed sinker comb.
  • the comb 2 has, on its upper face, a plurality of equidistant grooves 3 that lie at right angles to the extension of the comb 2.
  • the so-called cover 4 is arranged above the comb 2 and is rigidly coupled thereto; on the lower face of said cover 4, which is directed towards the comb 2, there is provided a plurality of grooves 5 that are parallel to the grooves 3.
  • Each groove of the comb 2 is superimposed on a respective groove 5 of the cover.
  • the upper and lower edges of the sinkers 6 are guided in the grooves 3 and 5 (figure 2) and are provided, at the front, with a groove 7 and, below said groove, with a beak 8, whereas at the rear they have a heel 8a the thickness whereof is increased by applying two lateral plates 9 to its opposite faces.
  • the so-called waves 10 act on the heels 8a, are articulated on a shaft 11, and are adapted to be actuated by the couliering cam 12 that runs on the rail 13.
  • the cam 12, by acting on the waves 10, actuates the forward movement of the sinkers 6, so that a thread deposited on the beaks of the sinkers can be gripped by the grooves 7 and be pushed between the needles 14 of the needle plate that are interposed between the sinkers.
  • the waves 10 are retained by appropriate tongs 15 that are fixed on a shaft 16.
  • the shaft 16 is actuated by the main cam shaft so that it can be turned into a position that allows the tongs 15 to disengage from the waves 10 and thus affect the collecting bar 16a which, by engaging in the notches 16b of the sinkers 6, causes said sinkers to retract to the starting point for the subsequent thread deposition cycle.
  • the needles 14 cooperate with the lowering sinkers for the formation of the fabric.
  • the sinkers 6 have a special shape that allows to fully eliminate the lowering sinkers and the corresponding actuation elements.
  • the sinkers 6 have, below the beak 8, a tab 17 that protrudes forwards beyond the end of the beak 8.
  • An elongated recess 18 remains between the beak 8 and the tab 17 and is delimited by the lower edge of the beak at the top and by the upper edge of the tab at the bottom.
  • the upper edge of the tab 17 has a tooth 19 that separates a hollow 20 formed in front thereof from a groove 21 that runs from the tooth 19 beyond the overlying groove 7, i.e., up to a point that is closer to the heel 8a than the groove 7.
  • the operating method of the described loom is as follows.
  • the operating situation of the loom is the one shown in figure 3, in which the sinkers 6 are in retracted position and the needles 14 intersect the sinkers at the end portion of the beaks 8.
  • the previously formed fabric, the last row of knitting whereof is engaged on the needles 14, is designated by T and protrudes from the recesses 18.
  • the thread guide 22 lays the thread F on the beaks 8.
  • the sinkers 6 are actuated forwards (figure 4), so that the thread F engages the groove 7 lying above the beak 8 and is pushed between the needles.
  • the fabric T enters the recesses 18 until it reaches the grooves 21.
  • the advancement of the sinkers 6 causes the insertion of the fabric in the hollow 20 until the formed row, by abutting on the teeth 19 (figure 9), is lowered against the previously formed fabric.
  • the cycle is completed by means of a small retraction of the sinkers (figure 10) and a lifting of the needles 14 that restores the starting situation of figure 1.
  • Figure 10 also shows, in dashed lines, the path followed by the tops of the needles, which substantially duplicates the shape of a double figure-of-eight due to the need to move the needles into abutment against the edge 23 during descent.
  • the invention allows to fully eliminate the conventional lowering sinker shafts, with all the actuation lever systems associated therewith, required to perform the composite movements that are necessary to assist the action of the needles.
  • the absence of these elements not only leads to a substantial reduction in the manufacturing costs of the loom but also allows greater access to the other elements, with the corresponding facilitations in assembly and tuning.
  • the shapes and the dimensions of the tabs 17 can vary according to the requirements of the fabric and to the movements performed by the sinker collector bar and by the needle bar.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Radiation-Therapy Devices (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
EP96106932A 1995-05-05 1996-05-02 Verbesserung an einer Cotton-Flachwirkmaschine Expired - Lifetime EP0741201B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT95BO000202A IT1278183B1 (it) 1995-05-05 1995-05-05 Perfezionamento ad un telaio cotton
ITBO950202 1995-05-05

Publications (3)

Publication Number Publication Date
EP0741201A2 true EP0741201A2 (de) 1996-11-06
EP0741201A3 EP0741201A3 (de) 1998-06-10
EP0741201B1 EP0741201B1 (de) 2002-08-14

Family

ID=11340574

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96106932A Expired - Lifetime EP0741201B1 (de) 1995-05-05 1996-05-02 Verbesserung an einer Cotton-Flachwirkmaschine

Country Status (5)

Country Link
EP (1) EP0741201B1 (de)
CN (1) CN1068079C (de)
DE (1) DE69622916T2 (de)
ES (1) ES2180671T3 (de)
IT (1) IT1278183B1 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR658990A (fr) * 1928-08-14 1929-06-22 Perfectionnements aux métiers rectilignes
FR833277A (fr) * 1936-12-07 1938-10-18 Métier à tricoter droit
FR905710A (fr) * 1944-07-07 1945-12-12 Perfectionnements aux métiers cotton
IT976503B (it) * 1973-02-14 1974-09-10 Orizio P Spa Platina perfezionata per macchine circolari da maglieria monofrontu ra particolarmente per la produzio ne di maglia traforata

Also Published As

Publication number Publication date
CN1136100A (zh) 1996-11-20
EP0741201A3 (de) 1998-06-10
CN1068079C (zh) 2001-07-04
ITBO950202A1 (it) 1996-11-05
ES2180671T3 (es) 2003-02-16
DE69622916D1 (de) 2002-09-19
IT1278183B1 (it) 1997-11-17
ITBO950202A0 (it) 1995-05-05
EP0741201B1 (de) 2002-08-14
DE69622916T2 (de) 2003-01-16

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