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:
May. 01, 2001
Filed:
May. 21, 1996
Takeshi Kono, Kawasaki, JP;
Atsushi Saito, Yokohama, JP;
Takashi Ono, Yokosuka, JP;
Shinichiro Koori, Kawasaki, JP;
Yukio Nohata, Yokohama, JP;
Shigeyuki Sugiyama, Hiratsuka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In an ink-jet printing apparatus employing an ejection failure detecting construction for optically detecting the number of ink droplets interrupting a light path, when a power source for an apparatus is turned on, a home position is detected. A carriage is shifted from this point at a constant speed, and ink ejection is performed sequentially within zones P,to P,where a photosensor is present. Then, among variations of output of the photosensor by sequential ink ejection, the number of steps S of a motor up to a timing where the maximum output Vmax is output. In a subsequent process for detecting ejection failure, ejection is performed at this position.