Method of producing curved and partly colored glass sheet
US4339257A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 16, 1981 |
| Grant date | Jul 13, 1982 |
| Priority date | — |
| Expiry date | Mar 16, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C17/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of producing a curved glass sheet having a colored coating layer formed in a selected region, such as a marginal region in the case of a window glass for the rear window of an automobile, by applying a coloring agent comprising inorganic pigment and glass frit of a low melting temperature onto a flat glass sheet surface, heating the glass sheet and press-bending the heat-softened glass sheet while the applied coloring agent is in fused state. As a novel feature, the coloring agent comprises alumina powder which adheres to the surfaces of the glass frit particles until fusion of the glass frit on the glass sheet surface. The presence of alumina powder prevents a shaping tool pressed against the glass sheet from adhering to the fused layer of the coloring agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.