Method for controlling or regulating a folder of a printing press
View Patent ↗A method for controlling or regulating a folder of a printing press in which at least one fold control mark is printed onto a printed copy or a printing material of the printed copy. The at least one printed fold control mark is measured and at least one fold actual measured value is compared with a corresponding fold setpoint value. The folder is then set automatically as a function of the comparison between the fold actual measured value and the fold setpoint value, such that the fold actual measured value corresponds to the fold setpoint value or is approximated to it in subsequent printed copies.
1. A method for controlling or regulating a folder of a printing press, comprising the steps of:
printing at least one fold control mark onto a printed copy or a printing material of the printed copy;
folding the printed copy or the printing material of the printed copy in the folder, thereby creating at least one actual fold, said step of printing comprising printing at least one fold control mark at least one of before and after each said step of folding, and said step of printing further comprising printing first fold control marks onto the printed copy or the printing material of the printed copy in an unfolded state, and printing second fold control marks onto the printed copy in a partly folded state;
after said step of folding, measuring the at least one fold control mark and obtaining at least one fold actual value from the at least one actual fold;
comparing the at least one fold actual value with a corresponding fold setpoint value, the corresponding fold setpoint value being associated with one of the at least one fold control mark; and
automatically setting an adjusting device of the folder based on the results of said step of comparing the fold actual value to the fold setpoint value, such that the fold actual value in subsequent printed copies corresponds to or is approximated to the fold setpoint value.
2. The method of claim 1 , wherein the first fold control marks are printed in printing units of the printing press.
3. The method of claim 2 , wherein the second fold control marks are printed in the folder.
4. The method of claim 1 , wherein the second fold control marks are printed in the folder
5. The method of claim 1 , wherein the folder control marks are printed with printing inks which are invisible to the human eye.
6. the method of claim 1 , wherein the folder control marks are printed with printing inks.
7. The method of claim 1 , wherein said of setting comprises automatically setting at least one of a folding former, a folding blade cylinder, a folding jaw cylinder, a gripper cylinder, or a folding table of the folder as a function of said step of comparing.
8. The method of claim 1 , further comprising the steps of removing one folded printed copy from a printing press, subsequently unfolding or folding open the removed copy, positioning the unfolded or folded open removed copy on a support, and performing said step of measuring on the copy on the support.
9. The method of claim 8 , wherein the step of positioning comprises aligning the at least one actual fold with at least one zero mark on the support.
10. The method of claim 1 , wherein said step of measuring is performed in the folder.