| 摘要 |
PURPOSE:To suppress generation of noise and heat and selectively use air pressure pumps by batch centralized control to dispense with the operation of an unnecessary pump by providing a printer and the air pressure pump separately, and supplying a desired air to the printer through a pipeline. CONSTITUTION:In the ceiling part in a printing chamber A, a ring feeder vacuum line 1, a delivery vacuum line 2, and a blower line 3 are provided, respectively, and each line 1-3 is communicated to each other through each printer 4a-4e and each air hose 5-7. Each line 1-3 is formed into a loop and partly extended to a pump chamber B partitioned from the printing chamber A. A plurality of air pumps F1-F3, D1-D3, B1-B5 (dry pump) are connected in series to each line 1-3. On the basis of the detected pressure of a means for measuring air pressure disposed in each pipeline, the operation of each air pump is ON/ OFF controlled. |
