Abstract: A sawtooth wire in which each tooth has a tooth tip and a tooth front having a first segment extending from the tooth tip towards a tooth side remote from a bearing edge and towards the tooth back and merging into a concave second segment that merges into a third segment extending towards the tooth side and merging into a concave fourth segment. that merges into a tooth back of the next tooth. The length of a tangent from a turning point of the second segment to the tooth side is greater than or equal to half the spacing between the tooth tip and the tooth side.

Abstract: A method of hardening a clothing wire for processing textile fibers and to an apparatus system therefor. The clothing wire has a succession of teeth arranged in its longitudinal direction, and the clothing wire is guided through a heating region in a pass-through direction for contact with at least one open flame. The heating region is followed by a quenching bath having a quenching liquid and by a subsequent tempering apparatus. The clothing wire moving in the pass-through direction is flushed around with a protective medium in a transition region between the region of contact with the open flame and the entry into the quenching liquid.

Abstract: A sawtooth wire in which each tooth has a tooth tip and a tooth front having a first segment extending from the tooth tip towards a tooth side remote from a bearing edge and towards the tooth back and merging into a concave second segment that merges into a third segment extending towards the tooth side and merging into a concave fourth segment. that merges into a tooth back of the next tooth. The length of a tangent from a turning point of the second segment to the tooth side is greater than or equal to half the spacing between the tooth tip and the tooth side.

Abstract: A method of hardening a clothing wire for processing textile fibres and to an apparatus system therefor. The clothing wire has a succession of teeth arranged in its longitudinal direction, and the clothing wire is guided through a heating region in a pass-through direction for contact with at least one open flame. The heating region is followed by a quenching bath having a quenching liquid and by a subsequent tempering apparatus. The clothing wire moving in the pass-through direction is flushed around with a protective medium in a transition region between the region of contact with the open flame and the entry into the quenching liquid.

Abstract: The present invention relates to a method of producing an opening cylinder for an open-end spinning machine, comprising the step of applying to the surface of a body of the opening cylinder a spirally extending sawtooth wire. For simplifying such a method and for making it less expensive, the present invention is so conceived that the sawtooth wire is supplied continuously to the body and welded to said body.