| 摘要 |
A main chamber and a sub chamber of an ink tank are defined by a common bottom wall. The bottom wall is formed with cave-in at its under surface. Also, the bottom wall is formed with two through holes at the caved-in portion, each at a respective chamber. A tank heater including insulating sheet attached over the under surface of the bottom wall while defining a channel. In this way, the main chamber and the sub chamber is connected via the channel defined by the bottom wall and the ink heater.
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