Roll pressing device for a sliver drawing frame

Abstract

A textile sliver drawing unit includes a roller assembly for advancing and drawing a sliver running therethrough. The roller assembly includes an upper roll and a lower roll cooperating with the upper roll. The drawing unit further has a pressing device for pressing the upper roll against the lower roll during operation. The pressing device includes a pivotally supported pressing arm having an inwardly pivoted operational position and an outwardly pivoted inoperative position; a force-generating device carried by the pressing arm; a movable member coupled to the force-generating device and engageable at least indirectly with the upper roll for transmitting a force from the force-generating device to the upper roll for pressing on the lower roll; and a carrier element mounted on the pressing arm and being settable into locking and unlocking positions. In the locking position the carrier element locks the upper roll to the pressing arm, whereby the upper roll is moved away from the lower roll together with the pressing arm when the latter is pivoted from the operative position into the inoperative position. In the unlocking position of the carrier element the upper roll is released from the pressing arm, whereby the upper roll remains positioned on the lower roll when the pressing arm is pivoted from the operative position into the inoperative position.

Dependencies are inferred from the claim text.