INK CARTRIDGE FOR INK JET RECORDING APPARATUS, CONNECTION UNIT AND INK JET RECORDING APPARATUS

摘要

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.

主权项

1. 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 the atmosphere communicating port protrudes further in the connecting direction than the ink supply port.