(19)
(11) EP 2 075 359 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
11.05.2011 Bulletin 2011/19

(43) Date of publication A2:
01.07.2009 Bulletin 2009/27

(21) Application number: 08020198.1

(22) Date of filing: 19.11.2008
(51) International Patent Classification (IPC): 
D01H 4/48(2006.01)
 D01H 13/10(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA MK RS

(30) Priority: 27.12.2007 JP 2007337974

(71) Applicant: Murata Machinery, Ltd.
Kyoto 601 (JP)

(72) Inventor:
  • Baba, Kenji
    Kyoto-shi Kyoto 612-8686 (JP)

(74) Representative: Liedl, Christine 
Hansmann & Vogeser Patent- und Rechtsanwälte Albert-Rosshaupter-Strasse 65
81369 München
81369 München (DE)

   


(54) Yarn slack eliminating device and spinning machine


(57) An object of the present invention is to provide a yarn slack eliminating device that enables tension applied to a yarn to be controlled while a spinning machine is in operation. A yarn slack eliminating device 12 includes an electric motor 25, a yarn slack eliminating roller 21, a yarn hooking member 22, an electromagnet 36, and a control section 74. The yarn slack eliminating roller 21 is rotationally driven by the electric motor 25. The yarn hooking member 22 is concentrically attached to the yarn slack eliminating roller 21 so as to be rotatable relative to the yarn slack eliminating roller 21. The electromagnet 36 generates a magnetic field to be applied to the yarn hooking member 22. The control section allows the magnetic field to generate a resistance torque resisting the rotation of the yarn hooking member 22 relative to the yarn slack eliminating roller 21. The control section 74 also controls an input to the electromagnet 36 to control the resistance torque (Fig. 3).







Search report