Electric heating – Metal heating – By arc
Reexamination Certificate
2006-05-16
2006-05-16
Paschall, Mark (Department: 3742)
Electric heating
Metal heating
By arc
C219S121540, C219S121590, C065S029190, C065S384000
Reexamination Certificate
active
07045737
ABSTRACT:
A glass-processing method adjusts the range of the heating region according to the work piece and processing condition, and a glass-processing apparatus implements the method. The method incorporates the heating of a glass body with a thermal plasma torch comprising (a) a main body provided with a plurality of ports from which a gas issues and (b) a device for applying a high-frequency electric field to the gas fed into the main body. The method comprises the steps of (1) adjusting the plasma flame's size perpendicular to the center axis of the main body by controlling the flow rate of the gas fed into each port according to the size of the glass body, the processing condition, or both and (2) heating the glass body. The apparatus comprises (a) a thermal plasma torch for heating a glass body, comprising (a1) a main body provided with a plurality of ports from which a gas issues and (a2) a device for applying a high-frequency electric field to the gas fed into the main body and (b) a device for adjusting the flow rate of the gas fed into each port.
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Hirano Masaaki
Nakanishi Tetsuya
Onishi Masashi
McDermott Will & Emery LLP
Paschall Mark
Sumitomo Electric Industries Ltd.
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