Methods and apparatus for heat treating glass sheets

Details Methods and apparatus for heat treating glass sheets Methods and apparatus for heat treating glass sheets

2006-05-18

2011-10-25

Daniels, Matthew (Department: 1741)

Glass manufacturing

Processes

Glass preform treating

Reexamination Certificate

active

08042359

ABSTRACT:
Methods for heat treating glass sheets (13) are disclosed in which the sheets (13) are held in a vertical orientation in a treatment container (15) during the heat treatment. The container (15) includes a support system for the glass sheets (13) that comprises a bottom support (17), two side supports (19a,19b), and a top support (21). The sheets (13) are slid into the container (15) without contact between their side edges (23a,23b) and the side supports (19a,19b). The top support (21) is then slid onto the tops of the sheets (13) without contacting the sheets' top edges (25). In certain embodiments, flushing air which has been HEPA filtered and pre-heated is passed through the container (15) during the heat treatment. Apparatus for practicing the methods of the invention are also disclosed.

REFERENCES:
patent: 2919022 (1959-12-01), Lidgard
patent: 4059426 (1977-11-01), Starr
patent: 7363777 (2008-04-01), Davidson
patent: 2005/0193772 (2005-09-01), Davidson
patent: 542918 (1955-12-01), None
patent: 2003048733 (2003-02-01), None
patent: 2003048733 (2003-02-01), None
JP 2003-048733 (Machine Translation) [online], [retrieved on Nov. 14, 2009], retrieved from PAJ Database (http://www19.ipdl.inpit.go.jp/PA1/cgi-bin/PA1INDEX).

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