Patent Number: 6,332,673

Title: Liquid container having reinforcing member

Abstract: An ink jet cartridge comprises a first chamber for accommodating a negativepressure producing material and having an air communication part forcommunication with ambient air, and a second chamber, substantially closedexcept for a liquid communication part, in communication with the firstchamber, which second chamber contains a reservoir of ink to be suppliedto the first chamber. A deformation prevention member is disposed withinthe second chamber thereby preventing or at least inhibiting deformationof the second chamber walls. A wall of the second chamber is 1.3 to 3times as thick as a wall of the first chamber.

Inventors: Higuma; Masahiko (Tohgane, JP), Ikeda; Masami (Yokohama, JP), Asai; Naohito (Yokohama, JP), Abe; Tsutomu (Isehara, JP), Kashino; Toshio (Chigasaki, JP), Karita; Seiichiro (Yokohama, JP)


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

Expiration Date: 12/25/2014