Web printing press and method for controlling print-to-cut and circumferential register
View Patent ↗A method for controlling the print-to-cut register in a web printing press having at least one print unit printing a web, each print unit having at least one drive driving the print unit independently of the other print units. The method includes presetting a web compensator position so as to set a print-to-cut registration between a print unit and a cross-cutter and controlling the print-to-cut register during printing by controlling the drives of the print units and/or a drive of the cross-cutter. A method for controlling circumferential register, as well as a printing press are also disclosed.
1. A method for controlling the print-to-cut register in a web printing press having at least one print unit printing a web, each print unit having at least one drive driving the print unit independently of any other print units, the method comprising the steps of:
presetting a web compensator position so as to set a proper print-to-cut registration between a print unit and a cross-cutter; and
controlling the print-to-cut register during printing by controlling the drives of the print units and/or a drive of the cross-cutter; and
storing a first value, the first value being a function of an angular position of a cylinder of the print units and/or the cross-cutter after a print job.
2. The method as recited in claim 1 further comprising storing a second value, the second value being a function of a position of the compensator, the second value being stored together with the first value.
3. The method as recited in claim 1 wherein the cylinder is maintained in the position for a second print job, and further comprising presetting a position of the web compensator for the second print job as a function of at least one other value, the at least one other value being a function of a previous position of the web compensator and a previous angular position of the cylinder with respect to the cross-cutter, the at least one other value being stored in a memory.
4. A method for controlling the print-to-cut register in a web printing press having at least one print unit printing a web, each print unit having at least one drive driving the print unit independently of any other print units, the method comprising the steps of:
presetting a web compensator position so as to set a proper print-to-cut registration between a print unit and a cross-cutter; and
controlling the print-to-cut register during printing by controlling the drives of the print units and/or a drive of the cross-cutter,
wherein the web contacting the web compensator is not slit.
5. A method for controlling the print-to-cut register in a web printing press having at least one print unit printing a web, each print unit having at least one drive driving the print unit independently of any other print units, the method comprising the steps of:
presetting a web compensator position so as to set a proper print-to-cut registration between a print unit and a cross-cutter; and
controlling the print-to-cut register during printing by controlling the drives of the print units and/or a drive of the cross-cutter,
wherein the web is slit after the web compensator.