EP 2072647 B1 20150930 - Draft roller
Title (en)
Draft roller
Title (de)
Streckwerkwalze
Title (fr)
Cylindre d'étirage
Publication
Application
Priority
JP 2007330694 A 20071221
Abstract (en)
[origin: EP2072647A2] Irrespective of the material (yarn type) of a sliver to be processed, a generation of the cyclic unevenness caused by a groove pitch of a draft roller and an accumulation of foreign materials in the grooves during drafting process can be prevented. A draft roller according to the present invention is provided in a draft device of a spinning machine and has groove parts (29) formed on a roller surface (28) of the draft roller and having an inclination relative to an axial direction of the draft roller, wherein given that a diameter of the draft roller is R, the number of the groove parts is N, an inclination relative to the axial direction of the groove parts is ¸, a fiber width of a sliver processed by the draft device is D and a circular constant is À, the draft roller satisfies a relationship ÀR/N < Dtan¸.
IPC 8 full level
CPC (source: EP)
Designated contracting state (EPC)
CH CZ DE LI TR
DOCDB simple family (publication)
EP 2072647 A2 20090624; EP 2072647 A3 20110511; EP 2072647 B1 20150930; CN 101463512 A 20090624; CN 101463512 B 20111005; JP 2009150025 A 20090709; JP 5251118 B2 20130731
DOCDB simple family (application)
EP 08020233 A 20081120; CN 200810174436 A 20081105; JP 2007330694 A 20071221