Mitsubishi Chemical Corporation

Toto Ltd.

Hiroaki Nagai

Takashi Yamaguchi

Koichi Hayashi

Yoshio Katsuro

Akira Utsunomiya

Hirotaka Ishibashi

Hozumi Endo

Tetsuaki Bundo

Shoji Oishi

Koji Kita

Susumu Narita

Toshifumi Yoshikawa

Nobuyuki Yamada

In a discharge lamp sealing apparatus , luminescent substances are charged into an arc tube through an opening thereof, and an electrode member is then inserted into the arc tube through the opening 13 . A lower end of the arc tube is supported by a support jig in a state that a glass ring is placed around the circumference of the opening . The arc tube is set in an air-tight condition by a feeding conduit and inserted into a heating unit . The heating unit fuses the glass ring with heat of an infrared lamp and thereby seals the opening . During the sealing process, one end of the arc tube is supported by the support jig . The support jig is mainly made of a material having a greater thermal conductivity than that of the material of the arc tube , for example, a metal material like Al or Cu. This arrangement enables heat to be readily conducted from the arc tube to the support jig and accordingly prevents a temperature rise in the arc tube . This prevents the luminescent substances from being vaporized and released from the arc tube

Discharge lamp, discharge lamp sealing method, discharge lamp sealing device

Process for producing synthetic quartz glass powder

Growing community of inventors

Kitakyushu, Japan

Hiroaki Nagai