In a drafting system (1) for a textile machine, in particular an air-spinning machine, for drafting a strand-shaped fibre band fed to the drafting system, having a plurality of roller pairs arranged in succession in a running direction (A) of the fibre band and each having a top roller (3) and a bottom roller (4), and a weighting device for applying a load to the top roller (3) of the plurality of roller pairs; wherein the respective bottom roller (4) is mounted and held in a housing (2) of the drafting system (1), wherein the respective top roller (3) is mounted and held in the housing (2) of the drafting system (1) by means of a top roller carrier (30) which can be pivoted about a rotary axis.

A drafting system unit for a drafting system of a spinning machine having a first top roller and a second top roller spaced apart therefrom, characterized in that an apron cage to which negative pressure can be applied is arranged between the first top roller and the second top roller for guiding an air-permeable apron in circulation jointly around the apron cage and an apron top roller, the apron top roller being formed by the first top roller or by a third top roller that is assigned to the apron cage and arranged on the same side as the first and second top roller in relation to the fiber band being transported. The apron cage has at least one through-opening, to which negative pressure can be applied, for applying suction air to the fiber band running between the first and second top roller, through the air-permeable apron.

Drafting system unit having a weighting arm and to a weighting arm for a drafting system unit for drafting a fiber band at a workstation of a textile machine, said weighting arm having a support arm and a top roller body, which is detachably mounted on a retaining device connected to the support arm. In order to provide a drafting system having a weighting arm and to provide a weighting arm for a drafting system unit for drafting a fiber band at a workstation of a textile machine, which drafting system and weighting arm can, in a user-friendly manner, be inspected, repaired and/or adapted to the fiber band material to be drafted and allow the top roller bodies to be easily replaced, there is provision for the top roller body to have an actuation section, which protrudes beyond the support arm in longitudinal axis direction of the top roller body.

A drafting system for a spinning machine, which drafting system has a drafting system unit, and to such a drafting system unit, having at least one weighting arm, which can be pivoted between an operating position and an open position by a repositioning device. In order to provide a drafting system and a drafting system unit for a drafting system for a spinning machine, the drafting system unit having a particularly simple design and permitting user-friendly operation, it is provided that the at least one weighting arm is connected to a retaining rod for conjoint rotation, which retaining rod is mounted on a retaining rod holder for rotation about the longitudinal axis of the retaining rod by the repositioning device.

A drafting system unit for a drafting system of a spinning machine. In a fiber band transport direction (R), the drafting system unit has a first top roller and a second top roller spaced apart therefrom, which are provided for drafting a fiber band, transported from the first to the second top roller, in cooperation with accordingly assigned bottom rollers, the respective axes of rotation of the first and second top roller extending transversely to the fiber band transport direction. The drafting system unit is characterized in that an apron cage to which negative pressure can be applied is arranged between the first top roller and the second top roller for guiding an air-permeable apron in circulation jointly around the apron cage and an apron top roller, the apron top roller being formed by the first top roller or by a third top roller that is assigned to the apron cage and arranged on the same side as the first and second top roller in relation to the fiber band being transported. The apron cage has at least one through-opening, to which negative pressure can be applied, for applying suction air to the fiber band running between the first and second top roller, through the air-permeable apron.

In a drafting system (1) for a textile machine, in particular an air-spinning machine, for drafting a strand-shaped fibre band fed to the drafting system, having a plurality of roller pairs arranged in succession in a running direction (A) of the fibre band and each having a top roller (3) and a bottom roller (4), and a weighting device for applying a load to the top roller (3) of the plurality of roller pairs; wherein the respective bottom roller (4) is mounted and held in a housing (2) of the drafting system (1), wherein the respective top roller (3) is mounted and held in the housing (2) of the drafting system (1) by means of a top roller carrier (30) which can be pivoted about a rotary axis.

A drafting system for a spinning machine, which drafting system has a drafting system unit, and to such a drafting system unit, having at least one weighting arm, which can be pivoted between an operating position and an open position by a repositioning device. In order to provide a drafting system and a drafting system unit for a drafting system for a spinning machine, the drafting system unit having a particularly simple design and permitting user-friendly operation, it is provided that the at least one weighting arm is connected to a retaining rod for conjoint rotation, which retaining rod is mounted on a retaining rod holder for rotation about the longitudinal axis of the retaining rod by the repositioning device.

A drafting system for a spinning machine, which drafting system has a drafting system unit, and to such a drafting system unit, having at least one weighting arm, which can be pivoted between an operating position and an open position by a repositioning device. In order to provide a drafting system and a drafting system unit for a drafting system for a spinning machine, the drafting system unit having a particularly simple design and permitting user-friendly operation, it is provided that the at least one weighting arm is connected to a retaining rod for conjoint rotation, which retaining rod is mounted on a retaining rod holder for rotation about the longitudinal axis of the retaining rod by the repositioning device.

A drafting system for a spinning machine, which drafting system has a drafting system unit, and to such a drafting system unit, having at least one weighting arm, which can be pivoted between an operating position and an open position by a repositioning device. In order to provide a drafting system and a drafting system unit for a drafting system for a spinning machine, the drafting system unit having a particularly simple design and permitting user-friendly operation, it is provided that the at least one weighting arm is connected to a retaining rod for conjoint rotation, which retaining rod is mounted on a retaining rod holder for rotation about the longitudinal axis of the retaining rod by the repositioning device.

A mounting carrier (3) for an opening roller (1) of an open-end spinning device features at least one part of a screw cap (8) comprising multiple positions, by means of which the mounting carrier (3) can be detachably fastened to a base body (2) of the opening roller (1) firmly connected to a drive shaft (6). Furthermore, the mounting carrier (3) features at least one part of a securing device (7). The securing device (7) includes a cover element (15) connected to the mounting carrier (3), by means of which at least one of the positions of the screw cap (8) can be indicated, and/or by means of which the mounting carrier (3) can be secured against unintentional detachment from the base body (2). An opening roller (1) features a base body (2) firmly connected to a drive shaft (6) and a mounting carrier (3) detachably connected to the base body (2) by means of a screw cap (8), whereas the screw cap (8) features multiple positions and, by rotating the mounting carrier (3) relative to the base body (2) around a common axis of rotation (A), can be transferred from a disengaged position (I) through a connecting position (II) into a locking position (III), and back. The screw cap (8) comprises at least one securing device (7), which includes one cover element (15) connected to the mounting carrier (3), which, at least in the connecting position (II), indicates the position of the screw cap (8), and/or which, at least in the connecting position (II), secures the mounting carrier (3) against unintentional detachment from the base body (2).