US 2011/0032289 A1Published application

Ink supply amount adjustment method and apparatus for printing press

AssigneeKomori Corporation

InventorMasahiro Hirano

Life of this patent

Estimating the term…

Loading patent…

Abstract

An ink supply amount adjustment method for a printing press includes steps of measuring the density value of each density measurement patch printed in a range corresponding to each ink fountain key on a printed printing sheet, obtaining the opening ratio of each ink fountain key in preliminary ink feeding, based on the difference between the measured density value of a patch and a preset reference density value, and the current opening ratio of each ink fountain key or image data in the range corresponding to each ink fountain key, and performing the ink feed operation of an ink ductor roller while printing is suspended, after setting the opening ratio of each ink fountain key to the obtained opening ratio in preliminary ink feeding. An ink supply amount adjustment apparatus for a printing press is also disclosed.

Claims12

Dependent claims

An ink supply amount adjustment method for a printing press including an ink fountain which stores ink, a plurality of ink fountain keys opening ratios of which are adjustable, an ink fountain roller supplied with the ink from the ink fountain through a gap between the ink fountain roller and the ink fountain keys, and an ink ductor roller which further supplies the ink, supplied to the ink fountain roller, to a printing plate by an ink feed operation, comprising the steps of:

measuring a density value of each density measurement patch printed in a range corresponding to each of the ink fountain keys on a printed printing sheet;
obtaining an opening ratio of each of the ink fountain keys in preliminary ink feeding, based on a difference between a measured density value of a patch and a preset reference density value, and one of a current opening ratio of each of the ink fountain keys and image data in the range corresponding to each of the ink fountain keys;
and
performing an ink feed operation of the ink ductor roller while printing is suspended, after setting the opening ratio of each of the ink fountain keys to the obtained opening ratio in preliminary ink feeding.

1 more element

An ink supply amount adjustment apparatus for a printing press including an ink fountain which stores ink, a plurality of ink fountain keys opening ratios of which are adjustable, an ink fountain roller supplied with the ink from the ink fountain through a gap between the ink fountain roller and the ink fountain keys, and an ink ductor roller which further supplies the ink, supplied to the ink fountain roller, to a printing plate by an ink feed operation, characterized by comprising:

a density value measurement unit which measures a density value of each density measurement patch printed in a range corresponding to each of the ink fountain keys on a printed printing sheet;
a calculation unit which obtains an opening ratio of each of the ink fountain keys in preliminary ink feeding, based on a difference between a measured density value of a patch and a preset reference density value, and one of a current opening ratio of each of the ink fountain keys and image data in a range corresponding to each of the ink fountain keys;
and
a preliminary ink feed unit which performs an ink feed operation of the ink ductor roller while printing is suspended, after the opening ratio of each of the ink fountain keys is set to the obtained opening ratio in preliminary ink feeding.

1 more element

Dependencies are inferred from the claim text.