Feeding trough for a sliver opening device of an open-end...

Details Feeding trough for a sliver opening device of an open-end... Feeding trough for a sliver opening device of an open-end...

2008-07-01

2008-07-01

Hurley, Shaun R (Department: 3765)

Textiles: spinning, twisting, and twining

Apparatus and processes

Open end spinning

Reexamination Certificate

active

07392649

ABSTRACT:
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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