| 摘要 |
PURPOSE:To relieve a temperature rise in a shadow mask in an effective manner as well as to manufacture the shadow mask in a manner conformable to mass production, by forming a nonapplication part, not applying a glass group partially, on the shadow mask with a vacuum. CONSTITUTION:An injection device 12 is impressed with a negative high voltage, for example, -90kV from a DC power source 10, while an electrostatic field is formed in space between a shadow mask 25 and the injection device 12. Glass particles emitted out of a feed tank 11 through the device 12 are always electrified and put on the electrostatic field whereby these particles are continuously stickable to the shadow mask 25. Each of vacuum ducts 19 and 18 is disposed at a shadow mask central part 25a and the whole circumference of a frame 27 as well as in and around a holder 29, which suction takes place with a vacuum duct 30 surrounding these elements on the whole, and a glass pulverulent body stream 13 being in a state of being atomized is formed there. These vacuum ducts 18 and 19 set up on a nonapplication part quickly advance the nearby glass pulverulent body stream 13, thus this stream 13 is preventable from sticking thereto. |
