| 摘要 |
PURPOSE:To obtain a correct size and a uniformly applied film with no required skill and simplify automation by immersing a neck tube opening part of a cathode-ray tube in graphite liquid and evacuating properly the air inside of the cathode-ray tube by means of a pipe led into the cathode-ray tube through the neck tube. CONSTITUTION:A cathode-ray tube 1 is supported by a receptacle 10 while being immersed in graphite liquid 12 in a bath 11. The graphite liquid 12 is prevented by a stirring blade 13 from settling. Further, a pipe 14 leads into the cathode-ray tube 1 in the bath 11 while the other end is connected to a tube 18 on the side of a vacuum absorption pump 17 by a three-way magnetic valve 16 through the tube 15 to absorb the graphite into the cathode-ray tube 1 and after the level of graphite reaches the proper height, the three-way magnetic valve 16 is changed- over to the tube 19 on the atmosphere side, while finishing the application of graphite to the inner surface of the cathode-ray tube. The part of a neck tube 5 of the cathode-ray tube, wherein the interior graphite application is completed, is wiped with a wiper 20 and further immersed in a water bath 21 in order to wash the graphite inside of the neck tube 5 by continuously feeding water from the pipe 22 to the neck tube 5. |
