| 摘要 |
PURPOSE:To prevent an improper product by providing a pressurized fluid supply device at a detection nozzle attached to the front face of a squeegee, and providing an alarm unit operated in response to the extension of the detected nozzle end from an ink reservoir, thereby generating an alarm before the ink lacks. CONSTITUTION:A detection nozzle 12 of a pneumatic sensor type fine level switch 10 is attached to the front face of a squeegee 3, pneumatic pressure of approx. 1-2mm of water column is acted at the end of the nozzle 12, and the end of the nozzle 12 is submerged several mm in an ink reservoir 4. Then, when the surface level of the reservoir 4 drops so that the end of the nozzle 12 is opened, the switch 10 is operated to actuate an alarm unit. A predetermined process is conducted by this alarm before the ink actually lacks.
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