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:
Jan. 12, 2010
Filed:
Sep. 20, 2002
Yukimitsu Fujimori, Nagano-ken, JP;
Yukimitsu Fujimori, Nagano-ken, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
Bidirectional recording is carried out with a printer that enables variable size dots of different ink quantities to be created with different driving waveforms Wand W. Variables are set to a time delay nbefore output of the driving waveform Wand a time interval nbetween the driving waveform Wand the driving waveform W. The output timings nand nof the driving waveforms Wand Win the course of a backward pass of main scan are individually regulated on the basis of dots created in a forward pass of the main scan as a reference. This arrangement desirably reduces a positional misalignment of dots created in the forward pass with dots created in the backward pass with regard to each of the variable size dots having different ink quantities, thus ensuring high-quality printing.