Coated metal element used for producing glass

Details Coated metal element used for producing glass Coated metal element used for producing glass

2001-11-29

2008-03-04

Blackwell, G. (Department: 1775)

Stock material or miscellaneous articles

Composite

Of quartz or glass

C428S434000, C428S469000, C428S471000, C428S472000

Reexamination Certificate

active

07338714

ABSTRACT:
The regionally coated noble metal element for use in glass production has an uncoated region for contacting a glass melt and a side opposite from the uncoated region is provided with an H2-impervious layer or an H2-impervious and O2-impervious layer. The H2-impervious layer or H2-impervious and O2-impervious layer has a thickness greater than or equal to 1 mm, is heat-resistant, liquid, or solid. This layer is made from at least one partly or completely crystallized glass or a glass mixture or a ceramic material. Processes for coating the noble metal element are also described. The coated metal elements can be an electrode in a distributor, a channel or melting tank, a pipe for conducting and conditioning glass melts, a shaping tool for producing pipes and rods or a jacketed platinum tube for direct heating of bottom outlets, transport equipment or charging organs, an agitator, a pipe-drawing head, a feeder head, a plunger in gob feeders, drawing tanks and drawing lips for flat glass production and fining chambers.

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