Glass manufacturing – Preform reshaping means with treating means
Reexamination Certificate
2006-04-11
2006-04-11
Mayes, Dionne W. (Department: 1731)
Glass manufacturing
Preform reshaping means with treating means
C065S182200, C065S287000, C065S290000, C065S182100, C065S291000
Reexamination Certificate
active
07024889
ABSTRACT:
For bending a glass sheet so that the glass sheet has a compound curvature, an apparatus comprises a furnace including hearth beds on a bed support and a quenching unit provided with upper and lower air blowers. The final hearth bed may have a top surface with a simple curvature, be provided with one upstream corner cut away thereby defining a cut surface section and arranged in such a manner that the cut surface section is nearly parallel to the hearth bed adjacent to the final hearth bed. Alternatively, the final hearth bed may have a top surface with a compound curvature, so that the glass sheet is bent under the conditions set by controlling a temperature in a downstream part of the furnace, adjusting the inclination of the lower air blower and/or rotating final hearth bed so as to reverse the upstream and downstream ends thereof.
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Nishitani Masami
Shinohara Makoto
Central Glass Company Limited
Crowell & Moring LLP
Mayes Dionne W.
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