Patent ID: 6223609
Filing Date: 2001-05-01
Classification: B65H,D01G,D01H

Abstract:
An apparatus for advancing a sliver and sensing thickness variations thereof in a fiber processing machine, comprising(a) a tongue-and-groove roll pair composed of a tongue roll and a groove roll; said groove roll being radially fixedly supported and having a circumferentially extending groove including a groove bottom; said tongue roll projecting into said groove and defining, with said groove roll, a nip through which said sliver passes for being compressed and advanced by said tongue-and-groove roll pair; and(b) a sensing device including a biased, movably supported sensor element projecting into said groove and cooperating with said groove bottom upstream of said nip as viewed in a direction of sliver advance for pressing the sliver against said groove bottom and for undergoing excursions in response to thickness variations of the sliver passing between said sensor element and said groove bottom.