Patent ID: 6061877
Filing Date: 2000-05-16
Classification: D01G

Abstract:
A fiber processing machine having an inlet for receiving fiber tufts to be processed; said machine including a fiber tuft advancing assembly comprising a fiber tuft advancing roll and means for advancing fiber tufts to said roll; said roll having a roll axis and a roll surface provided with a sawtooth clothing; said sawtooth clothing comprising a plurality of teeth separated from one another in a direction of roll rotation by respective tooth gaps each having a gap bottom; each tooth having a frontal flank oriented in said direction and a tooth point; said frontal flank advancing the fiber tufts upon rotation of said roll; each tooth having a tooth height h.sub.2 measured from said roll surface to the tooth point and a tooth gap height h.sub.3 measured from the tooth gap bottom to the tooth point; said tooth height h.sub.2 and said tooth gap height h.sub.3 are small for defining a small fill volume between teeth; each tooth having a back angle .gamma. having a magnitude of at least approximately 90.degree. and further having a large tooth division t and a large pitch P for defining a large open space about the teeth for avoiding a feed of fiber tufts between adjoining teeth viewed circumferentially and between adjoining teeth viewed axially.