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. 04, 2011
Filed:
Feb. 28, 2008
Takamasa Usui, Ogaki, JP;
Takamasa Usui, Ogaki, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya-shi, Aichi-ken, JP;
Abstract
A liquid ejection device of a first aspect of the invention includes a sub tank capable of fluid communicating with the main tank removably mountable to the liquid ejection device. The sub tank is configured to satisfy the formula: S−S≦M−Mwhere Sis a liquid amount in the sub tank in a balanced state at which the liquid has flowed into the sub tank by a hydraulic head pressure on mounting the main tank with the liquid fully filled; Sis a liquid amount in the sub tank in a state where the liquid level is positioned at the outlet of the sub tank; Mis a liquid amount in the main tank when the liquid is fully filled in the main tank; and Mis a liquid amount in the main tank in a state where the liquid level is positioned at a threshold level.