Severing by tearing or breaking – Methods – Transversely of continuously fed work
Reexamination Certificate
2006-05-22
2009-12-08
Peterson, Kenneth E. (Department: 3724)
Severing by tearing or breaking
Methods
Transversely of continuously fed work
C225S103000
Reexamination Certificate
active
07628303
ABSTRACT:
The method for mechanically breaking a flat workpiece of brittle fracturing material includes scribing spaced-apart parallel scribed lines in respective perpendicular cutting directions on the flat workpiece, especially a flat glass plate, with a laser and, after that, mechanically breaking the flat workpiece along the laser-scribed lines. In this way the flat workpiece can be divided into smaller rectangular workpieces. At least one breaking roller is used to break the flat workpiece along the scribed lines in one cutting direction. To improve the break edge quality and provide a higher yield a breaking bar that is shorter than the smaller of the width and the length of the flat workpiece is used to break the flat workpiece along the scribed lines in the other cutting direction and the breaking bar is pressed against each of those scribed lines in successive overlapping steps.
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Peterson Kenneth E.
Schott AG
Striker Michael J.
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