Device and method for positioning a cross cut on printing material and web-fed press having the device

A web-fed printing press, comprising at least one printing unit, a folder disposed downstream of said at least one printing unit, and at least one device for positioning a cross cut relative to printed images on at least one printing material web, the at least one device for positioning including:

• a cross cutter for making a cross cut in the at least one material web;
• a computing device for generating at least a first control signal for changing a phase angle of the printing unit and the cross cutter relative to one another;
• and
• a path length variation device for changing a path length through which the printing material web runs between the printing unit and the cross cutter;
• said computing device also generating a second control signal for changing said path length and adjusting a positioning of the cross cut on the printing material web by interaction of the change in said relative phase angle and the change in said path length.

A method of positioning a cross cut relative to printed images on at least one printing material web in a web-fed press having at least one printing unit and a cross cutter, the method which comprises the steps of:

• determining a phase angle of the printing unit and the cross cutter relative to one another;
• changing the phase angle of the printing unit and the cross cutter relative to one another;
• changing a path length through which the printing material web runs between the printing unit and the cross cutter;
• and
• adjusting the position of the cross cut on the printing material by interaction of the changed relative phase angle and the changed path length.