公开(公告)号：EP0234620A3

公开(公告)日：1988-02-03

申请号：EP87200135

申请日：1987-01-29

申请人： Officine Savio S.p.A.

发明人： Nerli, Giovanni ,  Grego, Francesco ,  Bottos, Roberto ,  Ferro, Francesco

IPC分类号： D01H01/135

CPC分类号： D01H4/06

摘要： Rotary twister element suitable to keep under ten­sion the fibres during the twisting operation in a fric­tional open-end spinning process, constituted by a solid, hollow, reduced-thickness element (5) with perforated skirt (4), which is internally provided with a suction duct (7) defining a longitudinal slot (6), the edge of which, which constitutes the thread formation line, is suitably inclined relative­ly to the generatrix of the same solid, hollow element, as a function of the direction of rotation of the solid element, and of the direction of thread extraction. Also a screen (21) is provided for the air dragged by the rotation of the solid element, which may have a cylindrical shape, a cone frustum shape, or the shape of any other revolu­tion solid.