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:
Aug. 07, 2007
Filed:
Dec. 03, 2004
Printing apparatus, control method therefor, printhead control circuit, and printhead driving method
Takuji Katsu, Kanagawa-ken, JP;
Toru Nakayama, Kanagawa-ken, JP;
Yuji Hamasaki, Kanagawa-ken, JP;
Norihiro Kawatoko, Kanagawa-ken, JP;
Atsushi Sakamoto, Kanagawa-ken, JP;
Takuji Katsu, Kanagawa-ken, JP;
Toru Nakayama, Kanagawa-ken, JP;
Yuji Hamasaki, Kanagawa-ken, JP;
Norihiro Kawatoko, Kanagawa-ken, JP;
Atsushi Sakamoto, Kanagawa-ken, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A printing apparatus having a printhead for printing by discharging liquid on a printing medium performs a toggle preliminary discharge operation of alternately performing discharge from main nozzles and dummy nozzles in order to establish a good discharge state of the liquid from the main nozzles. The main nozzles and the dummy nozzles communicate with liquid chambers, which in turn communicate with a common liquid chamber. A control circuit for the printhead and a control method are also provided.