Ink cartridge for ink jet recording apparatus, connection unit and ink jet recording apparatus
AssigneeSeiko Epson Corporation
InventorsMinoru Usui, Hisashi Miyazawa
Life of this patent
Estimating the term…
Abstract
An ink cartridge for supplying the ink in an ink reserving chamber via an ink supply port into a recording head has a differential pressure valve mechanism disposed between an ink flow port and the ink supply port in the ink reserving chamber, whereby the ink is supplied an adequate amount to the recording head by opening or closing the differential pressure valve mechanism in accordance with an ink pressure of the recording head. As a result, it is possible to supply the ink at a substantially constant pressure to the recording head without regard to the variation in the amount of ink or the movement of the carriage.
Claims3
An ink cartridge detachably connected to an ink supply apparatus that supplies ink to an ink ejection head, comprising:
- an atmosphere communicating port through which an internal space of the ink cartridge is in communication with the atmosphere;
- and
- an ink supply port adapted to supply the ink to the ink supply apparatus,
- wherein the atmosphere communicating port and the ink supply port are disposed on a front wall of the ink cartridge in a connecting direction of the ink cartridge to the ink supply apparatus, and
- wherein an opening end of the atmosphere communicating port, which is formed at an outer surface of a case of the ink cartridge, protrudes further in the connecting direction than an opening end of the ink supply port, which is formed at the outer surface of the case of the ink cartridge.
Dependencies are inferred from the claim text.