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:
Nov. 17, 2009
Filed:
Dec. 13, 2006
Yuji Hamasaki, Kawasaki, JP;
Norihiro Kawatoko, Yokohama, JP;
Atsushi Sakamoto, Kawasaki, JP;
Takuji Katsu, Kawasaki, JP;
Toru Nakayama, Yokohama, JP;
Yuji Hamasaki, Kawasaki, JP;
Norihiro Kawatoko, Yokohama, JP;
Atsushi Sakamoto, Kawasaki, JP;
Takuji Katsu, Kawasaki, JP;
Toru Nakayama, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A printing apparatus uses a printhead, which has a first nozzle array and a second nozzle array, each having a plurality of nozzles with a first nozzle discharging a first amount of ink and a second nozzle away having a plurality of nozzles with a second nozzle discharging a second amount of the ink and including nozzles to be used for printing on a printing medium and nozzles not to be used for printing on the printing medium. The printing apparatus selects, from the first nozzle array and the second nozzle array, nozzles to be driven within a predetermined period. The printing apparatus controls preliminary discharge control to drive the nozzles to be used for printing and the nozzles not to be used for printing by alternatively selecting the first nozzles and the second nozzles.