Cutting by use of rotating axially moving tool – Processes – Bit detachable
Reexamination Certificate
2006-01-23
2009-02-10
Howell, Daniel W (Department: 3726)
Cutting by use of rotating axially moving tool
Processes
Bit detachable
C408S044000, C408S070000, C408S087000, C279S003000, C451S041000
Reexamination Certificate
active
07488145
ABSTRACT:
A method for manufacturing a doughnut-shaped glass substrate by use of a glass substrate manufacturing apparatus, the glass substrate manufacturing apparatus comprising a work stage, three drilling machines and a conveying device capable of moving the work stage, comprising fixing a glass sheet on the work stage; moving the glass sheet to a position just above the core drill of the first drilling machine by use of the conveying device; partially drilling the glass sheet from downward by use of the core drill of the first drilling machine; moving the glass sheet to a position just under the core drill of the second drilling machine by use of the conveying device; forming the inner circular hole in the doughnut-shaped glass substrate by drilling the partially drilled portion from upward by use of the core drill of the second drilling machine; moving the glass sheet to a position just under the core drill of the third drilling machine by use of the conveying device; and separating the doughnut-shaped glass substrate from the glass sheet by drilling the glass sheet from upward by use of the core drill of the third drilling machine.
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Kaneko Masami
Watanabe Yuichi
Asahi Glass Company Limited
Howell Daniel W
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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