Method and apparatus for proof testing a sheet of brittle material
US7461564B2 · kind B2 · utility
70Cited by
23References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 31, 2007 |
| Grant date | Dec 9, 2008 |
| Priority date | — |
| Expiry date | Aug 6, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0282
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a method of proof testing a sheet of brittle material such as a glass or glass-ceramic based material. The method comprises bending the glass sheet over at least one arcuate member to detect sheets having a strength greater than a predetermined value. The method includes imparting a bend to the sheet and producing relative motion between the sheet and the bend such that the bend traverses the sheet, and wherein tensile stress induced in a surface of the sheet by the bend corresponds to the predetermined strength value. An apparatus for performing the proof testing is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.