Method of making glassware having a handcrafted appearance
US3986855A · kind A · utility
0Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1975 |
| Grant date | Oct 19, 1976 |
| Priority date | — |
| Expiry date | Feb 13, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C11/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Glassware having small bubbles or blisters that impart a handcrafted appearance to it is made by metering specially formed decomposable granules into a soda-lime glass melt at the feeder of a glass forming machine. The granules are made by coating or wetting an alkali metal nitrate with sodium silicate aqueous solution. They decompose in the melt, but the water glass coating slows the decomposition rate such that the resulting gas inclusions cannot escape from the melt before it has been formed or set in a desired shape in the forming machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.