Method and apparatus for glass tempering
US4946491A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 1988 |
| Grant date | Aug 7, 1990 |
| Priority date | — |
| Expiry date | Nov 21, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B27/044
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved glass tempering apparatus and method is disclosed. A glass sheet is quenched by heating the glass sheet and horizontally transferring the sheet on a roller conveyor into a quenching station having an upper and lower array of nozzles for directing coolant on opposite sides of the glass. A first array of points on the glass sheet are cooled, then the glass is horizontally jogged within the quenching station and a second array of points are cooled. Preferably, the jog distance is selected so that the first and second array of points are uniformly spaced relative to one another. An alternative embodiment of the invention cools a first array of points, horizontally jogs the glass within the quenching station and recools the same array of points with each point being cooled by a different nozzle pair so that the cooled points are uniformly sized and clearly defined with minimum irregularities resulting from roller shrouding and nozzle-to-nozzle variability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.