US 10,124,572 B2Granted

Method and device for adjusting contact pressure of intaglio printer wiping roller

AssigneeKomori Corporation

InventorsKenji Hayashi, Soichi Nakamura, Norihiro Kumagai

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Abstract

Provided is a method for automatically adjusting the contact pressure between an intaglio cylinder and a wiping roller that further limits the amount of defective prints generated. The method adjusts said contact pressure by changing the position of the wiping roller shaft center with respect to the intaglio cylinder shaft center using a contact pressure adjustment motor. At least the position of the wiping roller shaft center at low speed and the position of the wiping roller shaft center during printing operation for which the contact pressures have been optimized during a previous printing are stored. Before starting the current printing operation, the wiping roller is moved to the stored low speed position. Then when the current printing operation is started, the wiping roller is moved to the stored printing operation position.

Claims14

Dependent claims

A method of adjusting a contact pressure of a wiping roller of an intaglio printing press including

an intaglio cylinder,
the wiping roller configured to wipe excess ink off the intaglio cylinder,
a contact-pressure adjustment mechanism configured to adjust the contact pressure of the wiping roller on the intaglio cylinder, and
a contact-pressure adjustment motor configured to move the wiping roller by driving the contact-pressure adjustment mechanism, and
a controller configured to control operation of the printing press,
characterized in that the method comprises:
storing an adjusted position of the wiping roller in a low-speed state at a time at or before a start of final printing;
storing an adjusted position of the wiping roller in a printing-speed state at a time at or after an end of the final printing;
and
controlling the contact-pressure adjustment motor in a next printing operation in such a way as to
move the wiping roller at a time at or before a start of final printing to the position stored at the time at or before the start of the final printing in the last printing operation, and
move the wiping roller at a time at or after the start of the final printing to the position stored at the time at or after the end of the final printing in the last printing operation.

9 more elements

A device for adjusting a contact pressure of a wiping roller of an intaglio printing press including

an intaglio cylinder,
the wiping roller configured to wipe excess ink off the intaglio cylinder,
a contact-pressure adjustment mechanism configured to adjust the contact pressure of the wiping roller on the intaglio cylinder, and
a contact-pressure adjustment motor configured to move the wiping roller by driving the contact-pressure adjustment mechanism, and
a controller configured to control operation of the printing press,
characterized in that the device is configured to:
store an adjusted position of the wiping roller in a low-speed state into a first memory at a time at or before a start of final printing;
store an adjusted position of the wiping roller in a printing-speed state into a second memory at a time at or after an end of the final printing;
and
control the contact-pressure adjustment motor in a next printing operation in such a way as to
move the wiping roller at a time at or before a start of final printing to the position stored into the first memory at the time at or before the start of the final printing in the last printing operation, and
move the wiping roller at a time at or after the start of the final printing to the position stored into the second memory at the time at or after the end of the final printing in the last printing operation.

9 more elements

Dependencies are inferred from the claim text.