Patent ID: 6009606
Filing Date: 2000-01-04
Classification: D02G

Abstract:
A device for crimping synthetic bundles or slivers of yarns, said device comprising a stuffing box provided with an inlet for a yarn bundle or sliver and including a movable press plate and a stationary counter plate opposite to the press plate; two axially parallel rollers disposed at the inlet for the yarn bundle or sliver and forming a gap through which the yarn bundle or sliver enters the stuffing box; a pivot arm pivotally mounted on a stationary pivot bearing, one of said two axially parallel rollers being rotatably mounted at a fixed position in a machine frame, another of said two axially parallel rollers being seated on said pivot arm so as to be rotatable about a rotation axis thereof and said press plate being pivotally connected to said pivot arm by means of a rocker so as to be pivotable about said rotation axis of said roller seated on said pivot arm or another rotation axis parallel with said rotation axis of said roller seated on said pivot arm, whereby said gap between said rollers is varied; a contact pressure device for applying a contact-pressure force directed toward the counter plate to the press plate at an engagement point movable in a longitudinal direction of the stuffing box; an adjusting device for moving the engagement point of the contact-pressure forced on the press plate along the press plate; and closed-loop control circuit means for adjusting a reaction force acting between said rocker and said pivot arm to a predetermined fixed value by actuating the adjusting device.