| 摘要 |
PURPOSE:To improve the strength of silicate paint films and prevent the thermal deformation of bases by heating only the front glass panel sections by the radiation heating with infrared rays or far infrared rays. CONSTITUTION:Infrared ray emitting panels 15 are arranged facing the front glass panels 12b of cathode-ray tubes 12 at the upper section in a furnace body 10. A carrier 13 holding the cathode-ray tubes 23 is transferred into the furnace body 10 with a conveyor 11, only the front glass panels 12b are heated with infrared rays of the infrared ray emitting panels 15, and the silicate paint films coated on the front glass panels 12 are baked. In this case, the funnel 12a portions are shielded from the radiation heat of infrared rays by a shielding plate 14 thus are not heated. The strength of the silicate paint film can be thereby improved, and the deformation of bases can be prevented.
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