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. 27, 2012
Filed:
Nov. 12, 2008
Tetsuya Edamura, Kawasaki, JP;
Kiichiro Takahashi, Yokohama, JP;
Minoru Teshigawara, Yokohama, JP;
Akiko Maru, Kawasaki, JP;
Yoshiaki Murayama, Tokyo, JP;
Tetsuya Edamura, Kawasaki, JP;
Kiichiro Takahashi, Yokohama, JP;
Minoru Teshigawara, Yokohama, JP;
Akiko Maru, Kawasaki, JP;
Yoshiaki Murayama, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
On performing a predetermined printing operation, whether or not, among a plurality of printing elements, only a part of the printing elements are applied is detected. If it is judged that only the part of the printing elements are used, a judgment is made whether or not the preliminary discharge operation is performed based on the number of discharges for the part of the printing elements, and if it is not judged that only the part of the printing elements are used, a judgment is made whether or not the preliminary discharge operation is performed based on the number of discharges for all of the printing elements of the printing head. This eliminates an unnecessary preliminary discharge for non-printing elements even in a printing operation mode in which only a part of the printing elements are applied.