Ink-jet cartridge

摘要

The present invention is about an ink-jet cartridge (1) for thermal bubble ink-jet printers, which comprises: a housing (11), for containing the necessary printing ink (13) for the printer; a printhead (14), having a plurality of opening orifices, through which ink may stream forth unto paper upon demand; and a pressure-adjustment means (12), having a hollow tube for receiving ink therewithin, and one end of which having a ventilation opening for contact with the atmosphere and the other end thereof having at least one opening for contact with the ink, wherein said ventilation opening of the pressure-adjustment means being fixed onto the housing of the ink-jet cartridge and said opening being positioned at the bottom portion of the ink-jet cartridge on the same said as the printhead.