Patent ID: 6179415
Filing Date: 2001-01-30
Classification: B41J

Abstract:
An ink container connectable to an ink jet recording apparatus having a recording head, said ink container comprising:a housing having a front wall, a back wall, a top wall, a non-flat bottom wall, and first and second side walls;a first chamber for supplying ink to the recording head, said first chamber containing negative pressure producing material and having an air vent communicating with atmosphere;a second chamber disposed behind the first chamber in a direction from the front wall to the back wall, said second chamber providing an ink reservoir for the first chamber and communicating with the first chamber via a communication part;a partition wall for separating the first chamber from the second chamber and for defining the communication part; anda third chamber providing an ink reservoir for the second chamber and communicating only with the second chamber, said second chamber being substantially closed except for communication with the first and third chambers;wherein said third chamber is positioned so as to extend in a direction from the front wall to the back wall alongside said first and second chambers with the first side wall being adjacent said third chamber and with the bottom wall being shaped so that a portion of the bottom wall forming a wall of the third chamber is located at a higher level than a portion of the bottom wall forming a wall of the first and second chamber when, in use, said ink container is connected to the ink jet recording apparatus.