Apparatus for applying SO.sub.3 to float glass
US5643349A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1995 |
| Grant date | Jul 1, 1997 |
| Priority date | — |
| Expiry date | Feb 27, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C23/008
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides a method for making a stain-resistant float glass and an apparatus for carrying out such a method. In keeping with this method, SO.sub.3 is applied to the upper surface of float glass in an amount efficacious to materially reduce staining of the upper surface of the glass. Optimally, SO.sub.3 gas can be applied directly onto the upper surface of the glass. An apparatus of the invention generally includes a downwardly open hood positioned above the upper surface of the glass and having walls defining an enclosure. SO.sub.3 gas (either as such or as a reactive mixture of SO.sub.2 gas and an oxygen-containing gas) is delivered through a delivery tube to the enclosure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.