Open-end spinning machine with a plurality of spinnboxes with respective rotors and covers

An open-end spinning machine with a plurality of spinnboxes, each said spinnbox having a rotor disposed therein and a cover arranged at a front open side of said rotor, and further comprising a limitation device attached to said cover at a location so as to limit axial movement of said rotor onto said cover, said limitation device having a size and contact surface that is less than a full possible circular contact area between said rotor and said cover such that upon axial movement of said rotor towards said cover, said limitation device contacts said rotor over a limited circumferential segment of the possible circular contact area.

A cover for use in spinnboxes of an open-end spinning machine to cover the open front of a rotor disposed within the spinnbox, said cover comprising a limitation device attached to said cover at a location so as to limit axial movement of the rotor onto said cover, said limitation device having a size and contact surface that is less than a full possible circular contact area between the rotor and said cover such that upon axial movement of the rotor towards said cover, said limitation device contacts the rotor over a limited circumferential segment of the possible circular contact area.