Patent ID: 6289599
Filing Date: 2001-09-18
Classification: B65H,D01H,G01B

Abstract:
A drawing frame comprising:(a) a plurality of sliver drawing roll pairs;(b) means for simultaneously advancing a plurality of side-by-side running slivers through said roll pairs;(c) means for combining the slivers to form an output sliver;(d) means for discharging the output sliver; and(e) an drawing frame for detecting thickness variations of the side-by-side running slivers; said drawing frame including(1) a supporting surface guiding the side-by-side running slivers thereon in a single plane;(2) a holding member;(3) a plurality of sensor elements movably secured to said holding member to be movable in a direction transverse to said plane; each sliver being contacted by a separate said sensor element for causing excursions thereof by thickness fluctuations of the running sliver;(4) pressing means for yieldingly pressing each said sensor element against a respective said sliver; each sensor element cooperating with said supporting surface for pressing the running slivers against said supporting surface;(5) summation means for adding the excursions of said sensor elements; and(6) transducer means for converting excursion values into electric pulses representing the thickness variations of the running slivers.