Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Reexamination Certificate
2005-08-16
2005-08-16
Pelham, Joseph (Department: 3742)
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
C219S388000, C065S119000, C432S152000, C432S200000
Reexamination Certificate
active
06930285
ABSTRACT:
In a firing furnace of plasma display panel, gas distribution piping and gas exhaust piping each have a circular cross section and a uniform diameter along the longitudinal direction of those pipings. The gas distribution piping has a plurality of circular openings formed in a side face thereof and the openings are constructed such that the opening becomes larger in a stepwise fashion in a direction from both end portions to the central portion of the gas distribution piping. Furthermore, the gas exhaust piping has a plurality of elliptic openings formed in a side face thereof and the openings are constructed such that the opening becomes larger in a stepwise fashion in a direction from both end portions to the central portion of the gas exhaust piping.
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patent: 6845633 (2005-01-01), Vitkala
patent: 11-25854 (1999-01-01), None
Morgan & Lewis & Bockius, LLP
Pelham Joseph
Pioneer Plasma Display Corporation
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