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:
Sep. 21, 2004
Filed:
Sep. 19, 2001
Peter Weinholz, Kiel, DE;
Volkmar Funke, Altenholz, DE;
Heidelberger Druckmaschinen AG, Heidelberg, DE;
Abstract
The method generates trapping contours on color edges in a page to be printed that is defined in digital data. The trapping contours reduce the defects that are caused by register errors in the printing machine. The method operates similarly to a filter, using a window that is moved over the entire page, picture element by picture element. Certain neighboring picture elements of the central element are selected and used for calculating a trapping color. The color separation proportions of the central picture element are compared with the corresponding color separation proportions of the trapping color. The result of the comparison determines which color separation proportions of the central picture element are to be changed.