Industrial electric heating furnaces – Glass furnace device – Joule effect heating
Patent
1985-07-29
1986-09-02
Buczinski, Stephen C.
Industrial electric heating furnaces
Glass furnace device
Joule effect heating
C03B 526
Patent
active
H00001287
ABSTRACT:
A drain valve for use in a furnace for the melting of thermoplastic material. The furnace includes a drain cavity formed in its bottom for withdrawing a flow of thermoplastic material. The drain valve includes a flow member which include a flow tube having an inlet and outlet for the material, and coaxially disposed concentric tubular members defining annuli surrounding the flow tube. The tubular members include heating and cooling means for the flow tube. The flow member is adapted to fit in mating relationship in the drain cavity. A freeze valve member is disposed adjacent the outlet of the flow member. The freeze valve member includes heating means and has a plurality of air jets adapted to direct streams of pressurized air at the outlet to control the flow of thermoplastic material through the flow members.
The drain valve can also be used in a furnace of glass melting that includes a drain cavity for withdrawing molten glass from the furnace. The drain valve includes a flow tube member having an inlet and outlet, and having heating and cooling means. The tube member is adapted to fit in mating relationship with the drain cavity. A freeze valve member is disposed at the outlet of the flow tube member. The freeze valve member includes heating means and has a plurality of air jets adapted to direct a stream of pressurized air at the outlet to control the flow of glass through the flow tube member.
REFERENCES:
patent: 3524206 (1970-08-01), Boettner et al.
patent: 3852509 (1974-12-01), Rutledge et al.
Buczinski Stephen C.
Hightower Judson R.
The United States of America as represented by the United States
Wallace Linda J.
Westerdahl Allen F.
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