Patent ID: 6615732
Filing Date: 2003-09-09
Classification: B41F,B41P,G03G,H04N

Abstract:
A method for setting register on a multicolor printing machine (1) having color printing units (6, 6â€², 6â€³, 6â€²â€³) assigned to various printing inks, at least one image cylinder (2, 2â€², . . . ), image production equipment (3, 3â€², . . . ) for producing color separations (7, 7â€², . . . ), in particular electrostatic latent color separations (7, 7â€², . . . ), on the at least one image cylinder (2, 2â€², . . . ), a carrier (4) for printing substrates (15) and at least one image transfer point (5, 5â€², 5â€³, 5â€²â€³) for the transfer of the color separations (7, 7â€², . . . ) to the printing substrates (15), an assignment of the image production points (11, 11â€², . . . ) on the at least one image cylinder (2, 2â€², . . . ) being carried out in order to achieve coincidence of register between the color separations (7, 7â€², . . . ) in the print, by both the production of the image starts (10) and the production of areas (10â€², 10â€³, . . . , 10n) of the color separations (7, 7â€², . . . ) being set on the basis of the print and the evaluation of register marks (9, 9â€², 9â€³, 9â€²â€³), wherein at least one picture page (8, 8â€²) is printed which has register marks (9, 9â€², 9â€³, 9â€²â€³) and has a length (12, 12â€²) differing from that of the prints (14) whose register is to be set, and wherein, in order to determine the correction values (17, 17â€², 17â€³, 17â€²â€³), the data (16) from the register marks (9, 9â€², 9â€³, 9â€²â€³) of the at least one picture page (8, 8â€², . . . ) are measured and placed in a relationship with positions of elements (2, 2â€², . . . , 4, 13, 13â€², . . . ) that carry images and substrates, and the image production equipment (3, 3â€², . . . ) is controlled in accordance with the correction values (17, 17â€², 17â€³).