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:
Mar. 05, 2002
Filed:
Dec. 14, 1999
Applicant:
Inventors:
Minoru Koyama, Nagano-ken, JP;
Kiyoshi Mukaiyama, Nagano-ken, JP;
Koichi Otsuki, Nagano-ken, JP;
Noboru Asauchi, Nagano-ken, JP;
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/300 ; B41J 2/938 ;
U.S. Cl.
CPC ...
B41J 2/300 ; B41J 2/938 ;
Abstract
A shape of the drive signal within each one-pixel period of main scan is modified to have N different waveforms corresponding to N different values of the print signal, the N different values of the print signal representing formation of the N different dots. The N different waveforms of the drive signal are changed between the forward pass and the reverse pass. This will align the hitting positions of ink droplets in the main scanning direction during forward and reverse passes.