Process and apparatus for scoring a brittle material

Details Process and apparatus for scoring a brittle material Process and apparatus for scoring a brittle material

2004-07-30

2010-10-26

Elve, M. Alexandra (Department: 3742)

Electric heating

Metal heating

By arc

C219S121680, C219S121720, C219S121670, C219S121840

Reexamination Certificate

active

07820941

ABSTRACT:
The present invention relates to a process for laser scoring of flat glass sheets. The process comprises manipulating a laser beam having a substantially Gaussian intensity profile to produce an elongated heating zone on the glass sheet to be scored, the elongated heating zone having a central portion with a lower temperature than a temperature of an outer portion of the heating zone. An initial crack is made in the glass sheet, the elongated heating zone is traversed across the glass sheet coincident with the initial crack, and the heated glass is thermally shocked by directing a cooled liquid against the heated glass, thus propagating the crack. The scored glass sheet may thereafter be broken by applying bending techniques as are known in the art.

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