Methods for controlling glass sheet thickness
US8196431B2 · kind B2 · utility
10Cited by
1References
16Claims
0Family size
Assignee
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Key dates
| Filing date | May 20, 2009 |
| Grant date | Jun 12, 2012 |
| Priority date | — |
| Expiry date | May 6, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D5/03
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Methods for controlling thickness variations across the width of a glass ribbon (104) are provided. The methods employ a set of thermal elements (106) for locally controlling the temperature of the ribbon (104). The operating values for the thermal elements (106) are selected using an iterative procedure in which thickness variations measured during a given iteration are employed in a mathematical procedure which selects the operating values for the next iteration. In practice, the method can bring thickness variations of glass sheets within commercial specifications in just a few iterations, e.g., 2-4 iterations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.