The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 17, 2012
Filed:
Jul. 10, 2008
Günter Bestmann, Altenholz, DE;
Günter Bestmann, Altenholz, DE;
Heidelberger Druckmaschinen AG, Heidelberg, DE;
Abstract
A method for correcting gray balance of a printing process includes imaging printing forms assigned to color separations with a test form, printing a printing material using the printing forms in a printing press and calorimetrically measuring the test form printed onto the printing material. It is undesirably possible to produce a new color error in other tonal value ranges due to changing the layer thickness of a process ink to correct the gray balance. In order to perform a gray balance correction without disruptive secondary effects, a test form is imaged with colored gray areas, after their colorimetric measurement, at least two of the colored gray areas are selected and, based on their color values, a corrected tonal value of a non-black chromatic process ink is determined, and this corrected tonal value is recorded as a corrected set point of the process ink for imaging following printing forms.