Barmag Barmer Maschinenfabrik Ag

Roland Maier

Peter Dammann

Hellmut Lorenz

A yarn false twisting apparatus is disclosed which comprises a flexible disc mounted for rotation with a cooperating rigid disc to define a twisting zone therebetween. A pressure applying member is positioned adjacent the back face of the flexible disc for biasing the disc toward the rigid disc locally at the twisting zone so as to firmly engage the yarn passing through the twisting zone. The flexible disc comprises a hub portion disposed adjacent the center of the disc, an annular ring disposed concentrically about the hub portion and including a yarn engaging friction surface on one face thereof, and a distinct and highly flexible junction portion joining the hub portion and annular ring. The highly flexible junction portion permits the annular ring to readily flex in the lateral direction, to thereby permit the deflecting force to be minimized, while still permitting the rotating torque to be transmitted to the annular ring without significant circumferential deformation. The annular ring may also be divided into segments by radial or circumferential slots, to further reduce its resistance to the lateral deforming force of the pressure applying member, and to provide a substantially linear contact with the running yarn.

Yarn false twisting apparatus

A yarn false twisting apparatus is provided which includes a pair of twist imparting circular discs, with one of the discs being thin and flexible. A pressure applying member is positioned to upset the flexible disc toward the other disc at the twisting zone. In order to avoid undesired deformations of the flexible disc, the flexible disc includes reinforcing means, such as embedded reinforcing fibers, a reinforcing sheet, a discrete annular ring embedded in the material of the disc, or combinations thereof.

Growing community of inventors

Radevormwald, Germany

Roland Maier