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:
Nov. 22, 2005
Filed:
Nov. 10, 2003
Suguru Taniguchi, Tokyo, JP;
Toshihiko Ujita, Kanagawa, JP;
Suguru Taniguchi, Tokyo, JP;
Toshihiko Ujita, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In a sub-tank of an ink jet recording head, an ink absorbing member capable of being impregnated with and holding an ink is arranged and a space Vwhich is an area formed by a first wall surface of an ink reservoir and the ink absorbing member and in which the ink absorbing member is not present, is formed. A gas-liquid separation member made of a porous member, transmitting a gas but shutting off a liquid such as the ink is provided in a cap member in which an air hole is formed. A volume of the space Vand a total volume Vof an amount of the ink by which the ink is discharged from a discharge port of an ink jet recording element in one recovery operation and an initial pre-discharge amount hold a relationship of 0.7V≦V≦V