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. 23, 2008
Filed:
Oct. 22, 2004
Makoto Ando, Tokyo, JP;
Akihito Miyazaki, Kanagawa, JP;
Shigeyoshi Hirashima, Kanagawa, JP;
Shota Nishi, Kanagawa, JP;
Takumi Namekawa, Kanagawa, JP;
Masato Nakamura, Kanagawa, JP;
Makoto Ando, Tokyo, JP;
Akihito Miyazaki, Kanagawa, JP;
Shigeyoshi Hirashima, Kanagawa, JP;
Shota Nishi, Kanagawa, JP;
Takumi Namekawa, Kanagawa, JP;
Masato Nakamura, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A negative pressure generated inside a liquid-ejecting head can circulate liquid between the liquid-ejecting head and a liquid tank, prevent the liquid from leaking out of nozzles while the liquid is circulating, and remove bubbles contained in the liquid. A head cartridge includes a printhead ejecting ink from ink-ejecting nozzles formed in a nozzle plate of the printhead, an ink-supplying conduit supplying the ink from an ink tank to an ink chamber in the printhead, an ink-refluxing conduit refluxing the ink from the printhead to the ink tank, and a liquid-delivering pump disposed on the ink-refluxing conduit and circulating the ink between the printhead and the ink tank. The liquid-delivering pump is driven to generate a negative pressure inside the printhead to circulate the ink between the printhead and the ink tank.