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(11) | EP 1 300 248 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Ink cartridge and remaining ink volume detection method |
| (57) An ink cartridge has a first partitioning wall 5 and a third partitioning wall 7
for dividing the inside of a case 2 into a first ink chamber 9 and a second ink chamber
10, and a second partitioning wall 6 for demarcating an atmosphere connection chamber
11. In an upper case cover 3 are formed an ink filling hole 13 communicating with
the second ink chamber 10 and a pressure reduction hole 14 communicating with the
atmosphere connection chamber 11. Therefore, when ink filling is being done, the filling
apparatus and the pressure reduction apparatus need only be brought to bear from one
side of the upper case cover, resulting in improved work efficiency. Ink filling can
be performed efficiently because the ink successively passes to the second ink chamber
10 and the first ink chamber 9. After ink filling, the ink filling hole 13 and the
pressure reduction hole 14 can easily be sealed off with sealing material. An ink
cartridge is thus provided that can be easily assembled at low cost.
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