Fitting ring for an opening roller of an open-end spinning device

1. Clothing ring ( 27 ) for an opening roller ( 21 ) of an open-end spinning device ( 1 ), comprising teeth ( 38 ) which are formed by at least one groove ( 39 ) incorporated in the peripheral face of a basic body ( 45 ) and running in the peripheral direction, and a plurality of indents ( 40 ) arranged substantially in the axial direction, an axial separation spacing (t) of the teeth ( 38 ) being predetermined by the groove ( 39 ) and being significantly smaller than the height (H) of the teeth ( 38 ), characterized in that the teeth ( 38 ) have tooth flanks ( 42 ) which are continuously concavely curved into the groove ( 39 ), wherein the curvature of the tooth flanks ( 42 ), proceeding from the base of the groove ( 39 ) respectively arranged between two teeth ( 38 ), becomes continuously smaller toward the tip ( 50 ) of the tooth and wherein tangents ( 47 , 48 ) placed on the tooth flanks ( 42 ) enclose angles α with respect to the centre plane ( 43 ) of the tooth ( 38 ), which are 90° in the region of the groove base and virtually 0° in the region of the tooth crest ( 50 ).

2. Clothing ring according to claim 1 , characterized in that the tooth flank ( 42 ) has greater than 50% of the curvature on the first seventh ( 44 ) of its height (H) viewed from the groove base.

3. Clothing ring according to claim 1 , characterized in that the groove ( 39 ) arranged helically and running in the peripheral direction of the clothing ring ( 27 ) and the indents ( 40 ) arranged in the axial direction have virtually the same depth (T).

4. Clothing ring according to claim 1 , characterized in that the height (H) of the teeth ( 38 ) is approximately twice as great as the axial separation spacing (t) between the teeth ( 38 ).