Abstract: Apparatus for separating cotton type staple fibers from a fibrous sliver supplied to an open-end rotor spinning machine, said apparatus having a surface for supporting the so-called fiber beard of the sliver to be attacked by a card clothing of the combing cylinder. The dimensions and position of said support surface relative to the sliver feeding means and said card clothing are defined in dependence on the count of the sliver as well as on the gauge and staple length of the fibers to be processed. Such an optimization of the support surface dimensions and position makes it possible to attain an excellent evenness of fiber separation and consequently a good final yarn quality even with relatively low speeds of the combing cylinder, and also to reduce the risk of card clothing damage.

Abstract: A method of separating fibers from a fibrous sliver and conveying them in this condition to a twist forming element of an open-end spinning unit. The fibers traverse a fiber separating zone which is formed by the annular space between a combing-out cylinder and the bore of a housing. Ambient air is sucked into this fiber separating zone as well as into a sliver feeding zone. The air being sucked in is the resultant of air flowing in planes perpendicular to the axis of the combing-out cylinder, in planes passing through said axis and in planes parallel to said axis.The apparatus for carrying out the aforedescribed method which includes a housing with a bore, a combing-out cylinder coaxially mounted in the bore, a sliver feeding device mounted in a cavity of the housing adjacent to the combing-out cylinder, and a lid covering the housing, but at least the region of the sliver feeding device being at least partially exposed to permit ambient air to be sucked into the sliver feeding and fiber separating zones.

Abstract: A plurality of separate fiber slivers are introduced into spaced portions of a fiber-separating zone disposed in a combing cylinder-type fiber separating apparatus. The separated fibers are separately discharged into a common duct via a fiber-stripping zone associated with each combing cylinder. The regions of introduction of the separate slivers to the combing cylinder are suitably spaced so that the resulting separated fibers discharged into the duct form a common flow in the portion of the duct between the fiber-stripping zone and the downstream end of the duct. A yarn-spinning apparatus is disposed at the downstream end of the duct for receiving the common flow of the fibers, and such apparatus is mounted for rotation about an axis which is skewed with respect to the axis of the combing cylinder.

Abstract: Open-end fiber spinning machine including an under pressure spinning chamber and an opening roller mounted in a fiber opening body. The opening roller engages a feeding channel for feeding the separated fibers, said channel connecting directly the inner space of the spinning chamber with an environment of higher pressure. The feeding channel is provided in a wall located oppositely to the fiber opening roller with a curved surface which is engaged by the circumferential circle line of the sawtooth covering of the fiber opening roller.