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:
Sep. 10, 2002
Filed:
Feb. 29, 2000
Takayuki Yagi, Yokohama, JP;
Yasuyuki Tamura, Yokohama, JP;
Akira Asai, Atsugi, JP;
Tatsuo Furukawa, Isehara, JP;
Katsuhiko Shinjo, Isehara, JP;
Hidenori Watanabe, Zama, JP;
Mamoru Tsukada, Fujisawa, JP;
Yoshimasa Okamura, Odawara, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In a driving method of an ink-jet recording head, heat is generated by applying a drive signal to a heating element, and this heat is applied to ink to generate a bubble and discharge the ink through a discharge outlet. The drive signal comprises a first drive signal for storing foaming energy in the ink, and a second drive signal for generating a bubble in the ink. The second drive signal has a signal time shorter than the boundary foaming time at which foaming energy decreases in a case of performing foaming only by the second drive signal. The first drive signal is applied prior to the second drive signal in order to compensate for a decrease in foaming energy.