Patent Number: 6,966,641

Title: Ink reservoir, ink jet head structure including ink reservoir, and ink jet recording apparatus including ink reservoir

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 V2, which 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 V2 and a total volume V2 of 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 0.7V1.ltoreq.V2.ltoreq.V1.

Inventors: Taniguchi; Suguru (Tokyo, JP), Ujita; Toshihiko (Kanagawa, JP)

Assignee: Canon Kabushiki Kaisha

International Classification: B41J 2/175 (20060101); B41J 002/175 ()

Expiration Date: 1/22/02018