Patent ID: 6161269
Filing Date: 2000-12-19
Classification: D04H

Abstract:
A needle machine for needling a non-woven fiber fleece web, comprising at least one support for supporting a fiber fleece web to be needled, at least one movable needle bar equipped with a plurality of needles, a driving arrangement for causing said needle bar to have an oscillating motion, said driving arrangement including a first drive means connected to the needle bar and imparting on same a first movement component extending perpendicularly to the support, a second drive means connected to the needle bar and imparting on same a second movement component extending in parallel to the support, and a means for varying a movement stroke of the second movement component, said second drive means comprising two eccentric shafts, said eccentric shafts being driven at the same speed and each comprising an eccentric section with a connecting rod converting a rotating movement of the associated eccentric section into a linearly oscillating movement, said machine further comprising a coupling bridge having first and second hinge points spaced apart from one another to which the linearly oscillating movements of both connecting rods are supplied, and which coupling bridge comprises a third hinge point situated between said first and second hinge points, said third hinge point being pivotally connected to the needle bar by coupling means, and control means for varying the movement of the second movement component which acts on the second drive means in a manner that a mutual rotary angle position of the two eccentric shafts is varied.