| 摘要 |
A feeding trough for a sliver opening device of an open-end spinning device, having a concave gripping area for conveying a sliver, lateral walls for guiding the sliver, and a concavely curved support surface for fixing a fiber tuft combed by an opening roller, wherein the feeding trough is pivotable around a shaft parallel to the axis of the opening roller. The feeding trough ( 8 ) is arranged in its working position with a gap width A of 0.7 to 1.5 mm between the support surface ( 13 ) and adjoining tips ( 20 ) of the opening roller set ( 3 ) at a combing-in point K, which is constantly reduced to a gap width B of <=0.5 mm over an angle area W in the direction of rotation of the opening roller ( 2 ) of at least 30°. The gap width opposite the direction of rotation of the opening roller ( 2 ) up to a transition area ( 14 ) between the support surface ( 13 ) and the gripping area ( 11 ) substantially increases by only an amount such that, when pivoting the feeding trough ( 8 ) opposite the direction of rotation of the opening roller ( 2 ), a contact with the tips of the teeth ( 20 ) is avoided.
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