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Title: Jet-controlled freeze valve for use in a glass melter

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 ismore » 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.« less
Inventors:
 [1]
  1. (Aiken, SC)
Issue Date:
OSTI Identifier:
875180
Assignee:
United States of America as represented by United States (Washington, DC) SRS
Patent Number(s):
US H128
Contract Number:
AC09-76SR00001
Research Org:
E I DUPONT DE NEMOURS & CO INC
Country of Publication:
United States
Language:
English
Subject:
jet-controlled; freeze; valve; glass; melter; drain; furnace; melting; thermoplastic; material; cavity; formed; bottom; withdrawing; flow; tube; inlet; outlet; coaxially; disposed; concentric; tubular; defining; annuli; surrounding; heating; cooling; means; adapted; fit; mating; relationship; adjacent; plurality; air; jets; direct; streams; pressurized; control; molten; stream; plastic material; thermoplastic material; coaxially disposed; flow tube; air jets; heating means; pressurized air; cooling means; disposed adjacent; molten glass; glass melt; glass melter; cavity formed; drain valve; glass melting; air jet; /373/