Patent ID: 6688735
Filing Date: 2004-02-10
Classification: B41J

Abstract:
A printing liquid container connectable to an ink jet head for an ink jet recording apparatus, comprising:a first chamber accommodating a negative pressure producing material; a second chamber which is substantially closed except for a communication port communicating with said first chamber, wherein said second chamber provides a printing liquid reservoir for said first chamber; wherein said first chamber has, at a position away from said communication port, an air vent for communicating with ambient air; wherein at least in an initial state of use of said printing liquid container, the container is filled with printing liquid so as to leave a region of said negative pressure producing material adjacent said air vent free of printing liquid; and wherein said communication port is formed between a partition wall for defining said first and second chambers and an inside surface of said container, a wall of said first chamber facing said partition wall being provided with an opening for supplying printing liquid, and wherein means are provided for sealing the ink supply opening and said air vent.