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. 28, 2013
Filed:
Sep. 23, 2010
Koichi Kitakami, Chigasaki, JP;
Naoto Sasagawa, Kawasaki, JP;
Koichi Kitakami, Chigasaki, JP;
Naoto Sasagawa, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A driving method of a liquid discharge head including discharge ports, flow paths communicated with the discharge ports, a first actuator provided on the flow paths, a second actuator provided at a position further from the discharge port than the first actuator of the flow paths, and a common liquid chamber communicated with the flow paths, includes: contracting the flow path and expanding the flow path by the first actuator to discharge liquid from the discharge port; starting contraction of the flow path the second actuator when or before flow of liquid from the common liquid chamber to the discharge port in the vicinity of the second actuator, disappears to allow a meniscus of liquid, located at an inner position of the flow path, to project from the discharge port; and starting expansion of the flow path by the second actuator while the meniscus projects from the discharge port.