EP0725030B1 - Friction-based supply set for textile thread - Google Patents

Friction-based supply set for textile thread Download PDF

Info

Publication number
EP0725030B1
EP0725030B1 EP96200130A EP96200130A EP0725030B1 EP 0725030 B1 EP0725030 B1 EP 0725030B1 EP 96200130 A EP96200130 A EP 96200130A EP 96200130 A EP96200130 A EP 96200130A EP 0725030 B1 EP0725030 B1 EP 0725030B1
Authority
EP
European Patent Office
Prior art keywords
teeth
wheels
projections
recesses
supply set
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
EP96200130A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0725030A2 (en
EP0725030A3 (en
Inventor
Arturo Ratti
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.)
Arratex Srl
Original Assignee
Arratex 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 Arratex Srl filed Critical Arratex Srl
Publication of EP0725030A2 publication Critical patent/EP0725030A2/en
Publication of EP0725030A3 publication Critical patent/EP0725030A3/en
Application granted granted Critical
Publication of EP0725030B1 publication Critical patent/EP0725030B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch

Definitions

  • This invention relates to the field of textile machines, and in particular to supply sets which, in said machines, draw the textile thread by friction, sending it toward a take-up bobbin.
  • said supply sets as disclosed in DE 2 054 151 A which corresponds to the preamble of claim 1, are composed of two like coaxial gearwheels that are equipped with n teeth and engage frontally.
  • the teeth are shaped in a particular way, known to one skilled in the art, and have the characteristic that they exhibit an inclined or curved profile, such that each pair of mutually engaging teeth forms a V-shaped groove that is open toward the outer truncated circumferences of said gearwheels.
  • the textile thread is made to follow a path between a supply spindle and a take-up bobbin, in such a way that the thread grips tightly along a certain arc on said gearwheels; it is held between a number of V-shaped grooves corresponding to this gripping arc, arranges itself in a zig-zag pattern on said gearwheels, and is thus drawn, under the action of friction alone, by the rotation of the set of this supply device that is composed of the two wheels described above.
  • the opposing teeth of each pair form V-shaped grooves with different distances from the vertices of the axes of rotation of the wheels themselves, but the thread that is to be drawn is arranged tangentially to said wheel and to the projections that are arranged on the teeth of said wheels in accordance with a constant diameter of rotation.
  • a drawing effect of greater or lesser magnitude is obtained, and this varies the angle at which the thread is arranged on the zig-zag path on the teeth and thus varies the intensity of the friction.
  • this kind of variation can be achieved only using supply devices that are of different geometries or by placing the two wheels that comprise a set different distances apart.
  • the intention of inventor of this invention was to provide a supply set which would solve this problem and would offer quick and flexible maneuverability without requiring the use of spacers or different supply units.
  • Fig. 1 shows how textile thread 8, which comes from a supply station 7, is wound onto a take-up bobbin 6 after being drawn by friction by a supply set 5 under the action of above-described gripping arc ⁇ .
  • This arc can be modified using known techniques by moving a pulley 10 over an arc 11 in the direction indicated by the arrows.
  • Fig. 3 shows the shape of the profile, in section, of wheels 1, 1' that comprise a supply set 5 according to the invention, in which teeth 3, which are arranged at diametrically opposed positions that are shown better in Figs. 2 and 3, have two projections 3c, 3d that have different axial heights h1, h2, whereby said heights can be ⁇ 0.
  • recesses 4 which are visible in Fig. 2 and with which said projections 3c, 3d are made to mate, have differing depths p1, p2, which can be ⁇ 0 and which are better depicted in Figs. 4 and 5.
  • These latter figures also show how two wheels 1, 1' which comprise a set are arranged a certain distance apart and how they are arranged after they have completed a relative rotation that has caused projections 3d, which have a greater height h2, to mate with recesses 4 of lesser depth p2.
  • the thread is arranged, in its drawing arc ⁇ on supply set 5, in a zig-zag pattern between the different adjacent teeth, in the two cases following the paths indicated in Figs. 6 and 7, respectively.
  • angle ⁇ that is formed by the different segments of the zig-zag varies, and consequently the drawing effect that is imparted to the thread by the set and is greater in the case shown in Figs. 4 and 6 than in Figs. 5 and 7 also varies.
  • the diameter of the meshing arc remains constant, but the thread is always arranged tangentially to projections 3c, 3d, the distances between which and the center of rotation remain constant.
  • teeth 3 and an equal number of recesses 4 are both subdivided into only two groups that have differing axial projections and, respectively, different depths, with teeth 3 and recesses 4 alternating in such a way that said two projections 3c, 3d and two recesses 4, which have differing heights h and depths p, are arranged consecutively.
  • both the projections and the recesses are subdivided into a larger number of groups that have similar characteristics and dimensions, such that it is possible, by appropriately arranging the elements that constitute the different groups, to obtain a larger number of combinations of projections and recesses that can produce different configurations with different axial distances between frontally opposing wheels 1, 1'.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Looms (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Ropes Or Cables (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
  • Knitting Machines (AREA)
EP96200130A 1995-02-03 1996-01-19 Friction-based supply set for textile thread Expired - Lifetime EP0725030B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRM950068 1995-02-03
IT95RM000068A IT1278005B1 (it) 1995-02-03 1995-02-03 Gruppo alimentatore ad attrito per fili tessili.

Publications (3)

Publication Number Publication Date
EP0725030A2 EP0725030A2 (en) 1996-08-07
EP0725030A3 EP0725030A3 (en) 1997-08-13
EP0725030B1 true EP0725030B1 (en) 1998-10-28

Family

ID=11403000

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96200130A Expired - Lifetime EP0725030B1 (en) 1995-02-03 1996-01-19 Friction-based supply set for textile thread

Country Status (6)

Country Link
EP (1) EP0725030B1 (enExample)
AT (1) ATE172690T1 (enExample)
DE (1) DE69600847T2 (enExample)
ES (1) ES2124057T3 (enExample)
IT (1) IT1278005B1 (enExample)
TW (1) TW299371B (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006018073A1 (de) * 2006-04-10 2007-10-11 Spindelfabrik Suessen Gmbh Zuführrolle für einen Kernfaden zu einem Stapelfaserverband

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2054151C3 (de) * 1970-11-04 1974-05-16 Saurer Allma Gmbh Antriebsrolle (Voreilrolle) für Zwirn- oder Spulmaschinen
GB1416907A (en) * 1973-02-09 1975-12-10 Bonas Machine Co Yarn feed means
JPS5848460B2 (ja) * 1979-07-27 1983-10-28 村田機械株式会社 二重撚糸機で加工糸を撚り掛けして染色用パツケ−ジを得る方法

Also Published As

Publication number Publication date
TW299371B (enExample) 1997-03-01
EP0725030A2 (en) 1996-08-07
ES2124057T3 (es) 1999-01-16
DE69600847T2 (de) 1999-03-18
IT1278005B1 (it) 1997-11-17
EP0725030A3 (en) 1997-08-13
ITRM950068A0 (it) 1995-02-03
DE69600847D1 (de) 1998-12-03
ITRM950068A1 (it) 1996-08-03
ATE172690T1 (de) 1998-11-15

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