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:
Oct. 22, 2002
Filed:
Sep. 03, 1997
John Walter Worthington, Minnetonka, MN (US);
Lawrence J. Lukis, Long Lake, MN (US);
MacDermid Acumen, Inc., Waterbury, CT (US);
Abstract
The present invention relates to a method and apparatus for precise placement of discrete marks comprising a digital image using an optical sensor adapted to read individual dots of a variety of calibration patterns. The sensor is preferably coupled to a reciprocating carriage assembly so that the dot patterns recorded upon a printing media from at least two of a plurality of print heads disposed on the carriage assembly are compared, a preferred timing or trajectory control sequence is calculated, and thereafter relayed to the print heads to correct for physical misalignment of print heads, manufacturing tolerance errors, and the like to improve registration in a digital color print engine.