Patent ID: 6830322
Filing Date: 2004-12-14
Classification: B41J

Abstract:
A liquid ejection apparatus including a liquid ejection head and a liquid container comprising a liquid bag arranged in a housing for containing liquid to be supplied to said liquid ejection head, said apparatus having a structure adapted to generate negative pressure in said liquid ejection head as a result of a difference in height between said liquid ejection head and said liquid bag,wherein said liquid bag has first and second sides opposed to each other, said first side being rigidly held, at least partly, on an inner surface of said housing, while said second side is made freely movable, and said first side facing in a direction opposite to the direction of gravity and said second side facing in the direction of gravity when the liquid container is mounted in the apparatus, and wherein said apparatus is provided with means for detecting an amount of liquid remaining in said liquid bag as a result of sensing a position of said second side, said second side moving according to the amount of liquid contained in said liquid bag, and said detecting means having a portion adapted to move in accordance with a position of said second side.