Abstract: An air jet spinning machine and a drafting system unit for a spinning unit produce a thread or roving from a supplied fiber strip, with a front roller pair including a front top roller on a load carrier and a driven front bottom roller on a bottom roller carrier, and a bearing element arranged on the bottom roller carrier for movably bearing an air jet spinning nozzle. A reliable pivotable air jet spinning nozzle which can be released from the bottom roller carrier is implemented by the bottom roller carrier including a bearing element having a free end, for receiving the air jet spinning nozzle, wherein the bearing element forms a pivot axis for pivoting the air jet spinning nozzle between an operating position and a second position, wherein the bearing element is connected to a portion spaced apart from the free end on the bottom roller carrier.

Abstract: The invention relates to a device for positioning at least one roller in a drawing device and/or in a spinning unit, and/or for tensioning at least one belt, in particular a running belt, in a drawing device and/or in a spinning unit, wherein the device comprises: the at least one roller which is rotatably mounted, the at least one belt, in particular a running belt, at least one tension rod, and at least one guide device for contacting the belt at at least one contact point for guiding the belt during operation of the at least one roller. In order to improve and simplify the process of changing the belt, the at least one guide device is arranged and designed in such a way as to make the lower roller reversibly accessible for removing the belt and/or threading the belt, in particular without changing the relative positions of the roller, tension rod and/or belt to one another.

Abstract: The invention relates to an air jet spinning machine and a drafting system unit for a spinning unit of an air jet spinning machine for producing a thread or roving from a supplied fiber strip, with at least one front roller pair consisting of a front top roller on a load carrier and a driven front bottom roller on a bottom roller carrier and forming a clamping line, and a bearing element arranged on the bottom roller carrier for movably bearing an air jet spinning nozzle.