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:
Oct. 01, 2002
Filed:
May. 17, 1993
Hiroshi Tajika, Yokohama, JP;
Yoshiaki Takayanagi, Yokohama, JP;
Masayuki Hirose, Kawasaki, JP;
Souhei Tanaka, Kawasaki, JP;
Hiromitsu Hirabayashi, Yokohama, JP;
Noribumi Koitabashi, Yokohama, JP;
Yasuhiro Yamada, Yokohama, JP;
Yasuhiro Numata, Yokohama, JP;
Hitoshi Sugimoto, Yokohama, JP;
Miyuki Matsubara, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An ink jet recording apparatus is disclosed in which a bubble is created in ink by thermal energy generated in response to a drive signal applied to a heater, and the ink is ejected onto a recording material by expansion of the bubble. The recording apparatus includes a driving device and a changing device. The driving device applies a plurality of driving signals to the heater for each ink droplet ejection. The driving signals include a first driving signal for increasing a temperature of the ink adjacent the heater without creating the bubble, and a second driving signal after the first drive signal for ejecting the ink. An interval is provided between the first and second drive signals. The changing device changes a width of the first drive signal to adjust an amount of ejected ink. The interval is not shorter than 2.6 microseconds and the second drive signal has a constant width.