Abstract: Whereas in known needle rings the needles are of circular cross-section, the cross-section of the needles (1) the present needle ring (2) is equipped with is either oval or rectangular with flattened ends, or intermediate between these two shapes. The shorter dimension (1a) of the needle cross-section is to be arranged parallel to the axis of the ring. The needles (1) may be positioned perpendicularly in the ring or form an angle .alpha. up to 30.degree. with the radius (2b), while the angle .beta. at the tip should lie between 15.degree. and 45.degree.. The needles sit in round holes (3) the diameter of which is less than the width (1b) of the needles which in turn is approximately 4 to 6 times the thickness of the needles. Hence, the needle does not fully occupy the volume of the hole. Two channels (3b) remain open, which may be used for controlling the air flow effecting the fiber transport.

Abstract: The opening cylinder comprising a cylindrical ring serving as a needle support and being provided with needle-housing bores extending from the inner ring surface to the outer one is designed to carry needles comprising a point section of generally tapered shape and a shaft section, the latter being pressed into and seated with force fit in a radially inner section of a corresponding one of said bores. A radially outer section of the bore surrounds a portion of said needle point section so as to form an annular groove therearound at the orifice of the bore in the outer ring surface. The radially inner section of the bore or at least part thereof has a diameter which is at least as great as the diameter of the outer section of the bore in the range of its orifice in the outer ring surface.

Abstract: A combing roller including a reversible pinned ring, a ring core and a cover plate mounted on the ring core, the ring core and the cover plate having operating surfaces for mutually supporting the ring, and a plurality of tightening elements radially spaced in the core and plate adjacent the operating surfaces for securing flanges on the plate and core against the edges of the width of the ring. Preferably the width of the ring is greater than the combined widths of the operating surfaces.