Patent ID: 6851669
Filing Date: 2005-02-08
Classification: B65H,F16H

Abstract:
1. A drawing-device mechanism for a machine for processing a flat printing material, comprising: a first wheel having a locally fixed rotational axis; a second wheel having a rotational axis being pivotable about a further axis being axially parallel to said rotational axis of said second wheel, said second wheel being adjustable to different positions within an adjustment range for changing a center-to-center distance between said first wheel an said second wheel; a drawing-device tensioner being disposed at a fixed location and including a tensioning surface; an endless drawing device having a longitudinal direction and being partially looped around said first wheel, said second wheel and said drawing-device tensioner, said endless drawing device being positioned in engagement with said drawing-device tensioner and being tautened by drawing device pretensioning; said tensioning surface being directed towards said drawing device and being curved convexly in said longitudinal direction of said endless drawing device, and said first and second wheels and said tensioning device defining a geometry for maintaining said drawing-device pretensioning at least approximately unchanged in a first case increasing the center-to-center distance resulting in a reduction of the partially looping of said endless drawing device around said drawing-device tensioner and in a second case reducing the center-to-center distance resulting in an increase of the partially looping of said endless drawing device around said drawing-device tensioner.