Electric heating – Metal heating – By arc
Reexamination Certificate
2005-03-22
2005-03-22
Evans, Geoffrey S. (Department: 1725)
Electric heating
Metal heating
By arc
C219S121820, C225S002000, C225S093500
Reexamination Certificate
active
06870129
ABSTRACT:
The cutting of the flat glass plate (1) into rectangular plates with a predetermined edge length is performed by forming initial cracks at the beginning of cutting lines on the glass plate and moving a laser beam along the cutting lines followed by a cooling spot to induce a thermo-mechanical stress alone the cutting lines. First the glass plate (1) is cut apart into partial plates (2-5) along first parallel cutting lines spaced according to the predetermined edge length. Then the cut apart glass plate is rotated by 90° and the partial plates (2-5) are moved apart from each other. Subsequently the partial plates that have been moved apart are cut apart alone several parallel second cuts (4-9) perpendicular to the first cuts. This method facilitates exact placement of the initial cracks.
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Geissler Georg
Hauer Dirk
Hoetzel Bernd
Lüttgens Thomas
Evans Geoffrey S.
Schott Glas
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