Title:
【発明の名称】陰極線管の製造方法とその装置
Document Type and Number:
Japanese Patent JP2822480
Kind Code:
B2
Abstract:
A method and an apparatus for manufacture of a cathode-ray tube where an electron gun (2) for emitting a plurality of electron beams is enclosed in a tube body (1) with discrete electrodes (K1 to K3, G11 to G13) disposed individually to such beams and joint electrodes (G2 to G5) disposed commonly to the beams. The method comprises the steps of incorporating the electron gun (2) in the tube body (1) and applying high-frequency induction heat principally to the joint electrodes (G3 to G5) to thereby evacuate and seal up the tube body (1); flashing a getter material; and disposing at least a pair of cored coils (14) on both sides of the tube body (1) at positions opposite to the discrete electrodes (K1 to K3, G11 to G13) disposed individually to the plurality of beams, and applying high-frequency induction heat principally to the discrete electrodes. Meanwhile, the apparatus is equipped with a high-frequency induction heating device having a pair of cored coils (14) to execute the electron gun heating with certainty, hence realizing satisfactory manufacture of a high-reliability cathode-ray tube having a long service life.
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Inventors:
Kiyotaka Tamba
Application Number:
JP23873989A
Publication Date:
November 11, 1998
Filing Date:
September 14, 1989
Export Citation:
Assignee:
ソニー株式会社
International Classes:
H01J9/385; H01J9/39; H01J29/94; (IPC1-7): H01J9/385; H01J9/38
Domestic Patent References:
| JP63105491A | ||||
| JP63128630A |
Attorney, Agent or Firm:
Hidekuma Matsukuma