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US 6,615,732 B2Granted
Method and apparatus for setting register on a multicolor printing machine
AssigneeNexPress Solutions LLC
InventorsHeiko Hunold, Patrick Metzler
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AssigneeNexPress Solutions LLC
InventorsHeiko Hunold, Patrick Metzler
Estimating the term…
A method and apparatus for setting register on a multicolor printing machine (1) having color printing units (6, 6′, 6″, 6′″) assigned to various printing inks, at least one image cylinder (2, 2′, . . . ), image production equipment (3,3′, . . . ) for producing color separations (7, 7′, . . . ) on the at least one image cylinder (2, 2′, . . . ) and a carrier (4) for printing substrates (15). An assignment of the image production points (11, 11′, . . . ) on the at least one image cylinder (2, 2′, . . . ) is carried out in order to achieve coincidence of register between the color separations (7, 7′, . . . ) in the print, by both the production of the image starts (10) and the production of areas (10′, 10″, . . . , 10n) of the color separations (7, 7′, . . . ) set on the basis of the print and the evaluation of register marks (9, 9′, 9″, 9′″).
A method for setting register on a multicolor printing machine (1) having color printing units (6, 6′, 6″, 6′″) assigned to various printing inks, at least one image cylinder (2, 2′, . . . ), image production equipment (3, 3′, . . . ) for producing color separations (7, 7′, . . . ), in particular electrostatic latent color separations (7, 7′, . . . ), on the at least one image cylinder (2, 2′, . . . ), a carrier (4) for printing substrates (15) and at least one image transfer point (5, 5′, 5″, 5′″) for the transfer of the color separations (7, 7′, . . . ) to the printing substrates (15), an assignment of the image production points (11, 11′, . . . ) on the at least one image cylinder (2, 2′, . . . ) being carried out in order to achieve coincidence of register between the color separations (7, 7′, . . . ) in the print, by both the production of the image starts (10) and the production of areas (10′, 10″, . . . , 10n) of the color separations (7, 7′, . . . ) being set on the basis of the print and the evaluation of register marks (9, 9′, 9″, 9′″), wherein at least one picture page (8, 8′) is printed which has register marks (9, 9′, 9″, 9′″) and has a length (12, 12′) differing from that of the prints (14) whose register is to be set, and wherein, in order to determine the correction values (17, 17′, 17″, 17′″), the data (16) from the register marks (9, 9′, 9″, 9′″) of the at least one picture page (8, 8′, . . . ) are measured and placed in a relationship with positions of elements (2, 2′, . . . , 4, 13, 13′, . . . ) that carry images and substrates, and the image production equipment (3, 3′, . . . ) is controlled in accordance with the correction values (17, 17′, 17″).
A multicolor printing machine (1) having color printing units (6, 6′, 6″, 6′″) assigned to various printing inks, at least one image cylinder (2, 2′, . . . ), image production equipment (3, 3′, . . . ) for producing color separations (7, 7′, . . . ), in particular electrostatic latent color separations (7, 7′, . . . ), on the at least one image cylinder (2, 2′, . . . ), a carrier (4) for printing substrates (15) and at least one image transfer point (5, 5′, 5″, 5′″) for the transfer of the color separations (7, 7′, . . . ) to the printing substrates (15), sensors (20, 21) for measuring positions' and at least one setting device (22, 22′, 22″, 22′″) for assigning the positions of the image production points (11, 11′, . . . ) on the at least one image cylinder (2, 2′, . . . ) in order to achieve coincidence of register between the color separations (7, 7′, . . . ) in the print, at least one register sensor (23) being arranged to detect register marks (9, 9′, 9″, 9′″), and the at least one setting device (22, 22′, 22″, 22′″) being designed such that it initiates the test printing of register marks (9, 9′, 9″, 9′″) and evaluates them in such a way that it sets the production of the image starts (10) and the production of areas (10′, . . . , 10n) of the color separations (7, 7′, . . . ) on this basis, wherein it has at least one setting device (22, 22′, 22″, 22′″) which is designed such that it initiates the printing of at least one picture page (8, 8′) which has register marks (9, 9′, 9″, 9′″) and has a length (12, 12′) differing from that of the prints (14) whose register is to be set, and wherein the at least one setting device (22, 22′, 22″, 22″) is designed such that, in order to determine the correction values (17, 17′, 17″), it places the data (16) from the detected register marks (9, 9′, 9″, 9′″ in a relationship with positions of elements (2, 2′, . . . , 4, 13, 13′, . . . ) that carry images and substrates, and controls the image production equipment (3, 3′, . . . ) in accordance with these correction values (17, 17′, 17″).
Dependencies are inferred from the claim text.