Refining Glass with Reduced Pressure
AssigneeOwens-Brockway Glass Container Inc.
InventorsZhongming Wang, Nicholas A. Schoenrock, Ya-Cheng Lin
Life of this patent
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Abstract
An apparatus and methods of refining glass, in a multi-stage, downwardly cascading manner, include a melting chamber housing molten glass and having an outlet, a first refining chamber downstream from the melting chamber and having a first outlet and a first inlet below the outlet of the melting chamber, and a second refining chamber downstream from the first refining chamber and having a second outlet and a second inlet below the first outlet of the first refining chamber. The first refining chamber has a first negative pressure and the second refining chamber has a second negative pressure.
Claims20
A method of refining glass in a multi-stage, downwardly cascading manner, the method including the steps of:
- (a) producing molten glass in a melting chamber having an outlet;
- (b) passing the molten glass downstream from the melting chamber into a first refining chamber having a first outlet and a first inlet below the outlet of the melting chamber, wherein the first refining chamber has a first negative pressure of 1 to 760 Torr and
- (c) passing the molten glass downstream from the first refining chamber into a second refining chamber having a second outlet and a second inlet below the first outlet of the first refining chamber, wherein the second refining chamber has a second negative pressure of 1 to 700 Torr.
An apparatus for refining glass in a multi-stage, downwardly cascading manner, the apparatus comprising:
- a melting chamber housing molten glass and having an outlet;
- a first refining chamber downstream from the melting chamber and having a first outlet and a first inlet below the outlet of the melting chamber, the first refining chamber having a first negative pressure of 1 to 760 Torr;
- and
- a second refining chamber downstream from the first refining chamber and having a second outlet and a second inlet below the first outlet of the first refining chamber, the second refining chamber having a second negative pressure of 1 to 700 Torr.
Dependencies are inferred from the claim text.