System and method for controlling the environment around one...

Glass manufacturing – Processes – Fining or homogenizing molten glass

Reexamination Certificate

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C065S134400, C065S134200, C065S157000

Reexamination Certificate

active

07628038

ABSTRACT:
A system and method are described herein that control the environment (e.g., oxygen, hydrogen, humidity, temperature, gas flow rate, pressure) around one or more vessels in a glass manufacturing system. In the preferred embodiment, the system includes a closed-loop control system and a capsule that are used to control the level of hydrogen around the exterior (non glass contact surface) of the vessel(s) so as to suppress the formation of gaseous inclusions and surface blisters in glass sheets. In addition, the closed-loop control system and capsule can be used to help cool molten glass while the molten glass travels from one vessel to another vessel in the glass manufacturing system. Moreover, the closed-loop control system and capsule can be used to maintain an atmosphere with minimal oxygen around the vessel(s) so as to reduce the oxidation of precious metals on the vessel(s).

REFERENCES:
patent: 3607166 (1971-09-01), Loughridge et al.
patent: 3970442 (1976-07-01), Gulotta
patent: 5785726 (1998-07-01), Dorfeld et al.
patent: 6158246 (2000-12-01), Borrelli et al.
patent: 6993936 (2006-02-01), Grzesik et al.
patent: 2001/0039814 (2001-11-01), Pitbladdo
patent: 2005/0109062 (2005-05-01), Stelle et al.
patent: WO 2005/030661 (2005-04-01), None

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