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. 29, 2005
Filed:
Apr. 14, 2003
Applicants:
Tadashi Yamamoto, Kanagawa, JP;
Takaaki Hoshino, Yokohama, JP;
Inventors:
Tadashi Yamamoto, Kanagawa, JP;
Takaaki Hoshino, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J029/38 ; B41J029/393 ;
U.S. Cl.
CPC ...
Abstract
In an inkjet printing apparatus which holds a printhead for performing printing by using ink supplied from an ink tank via an ink supply channel, the ink tank has a tank-side terminal for detecting the presence state of ink in the ink tank. The printhead has a head-side terminal for detecting the presence state of ink in the printhead. The printing apparatus detects at least one of the presence state of ink in the ink tank, printhead, and ink supply channel by selecting a terminal used for detection between the tank-side terminal and the head-side terminal.