Drawing-device mechanism for a machine for processing sheet-like printing materials

A machine for processing a flat printing material, having a drawing-device mechanism, comprising an endless drawing device;

• a first wheel, a second wheel and a drawing-device tensioner in an arrangement wherein said drawing device partially loops around said first and said second wheel;
• said drawing-device tensioner, with said drawing device partially looped around it, and said drawing device being tautened in the process due to drawing-device pretensioning, being positioned in engagement with said drawing device;
• said first wheel having a locally fixed rotational axis, and said second wheel, with a changed center-to-center distance between said second wheel and said first wheel, and with maintained elongated sections of said drawing device, being adjustable to different positions within an adjustment range;
• and a tensioning surface formed on said drawing-device tensioner, said tensioning surface being directed towards said drawing device and being curved convexly in the longitudinal direction of said drawing device;
• said drawing-device mechanism having a geometry with which, during an adjustment of said second wheel, with an increase in said center-to-center distance in a first case and with a reduction in said center-to-center distance in a second case, said drawing-device pretensioning remains at least approximately unchanged as a result of a reduction in said looping of said drawing device around said drawing-device tensioner in said first case and an increase in said looping of said drawing device around said drawing-device tensioner in said second case, absent any change in location of said drawing-device tensioner.