| 摘要 |
PURPOSE:To detect a residual ink amount in an ink containing bag on which an aluminum film is vapor deposited. CONSTITUTION:An ink containing bag 1 is made of a flexible material where an aluminum film is vapor deposited partially or over the full surface thereof. A photointerruper 6 is composed of a light emitting element 6b and a light receiving element 6a. The photointerrupter 6 is mounted on a position where it can output a maximum power when exhaustion of ink causes the ink containing bag 1 to deflate to its maximum. The output signal of the light receiving element 6a is inputted to a detection circuit, where presence of ink is detected in accordance with the magnitude of the output signal. |
