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:
Apr. 03, 2012
Filed:
Mar. 11, 2008
Toshiya Kojima, Kanagawa-ken, JP;
Yasuhiko Kachi, Kanagawa-ken, JP;
Masahito Katada, Kanagawa-ken, JP;
Toshiya Kojima, Kanagawa-ken, JP;
Yasuhiko Kachi, Kanagawa-ken, JP;
Masahito Katada, Kanagawa-ken, JP;
Fujifilm Corporation, Tokyo, JP;
Abstract
The back pressure adjustment apparatus for a liquid ejection head has: a container having a liquid accommodating chamber which is connected to the liquid ejection head and accommodates liquid to be supplied to the liquid ejection head, and a gas accommodating chamber which accommodates gas; a movable film which separates the liquid accommodating chamber and the gas accommodating chamber, and forms a portion of whole walls of the liquid accommodating chamber; and a pressure adjustment device which causes all or a portion of the movable film to deform so as to adjust pressure of the liquid accommodated in the liquid accommodating chamber.