Method of manufacturing glass article
US5141546A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 2, 1992 |
| Grant date | Aug 25, 1992 |
| Priority date | — |
| Expiry date | Jan 2, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/808
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a method of manufacturing a glass article by means of a sol-gel process, a metal alkoxide is hydrolyzed, dehydrated and condensed to obtain a wet gel. A molding container is used for drying and shrinking the wet gel to obtain a dry gel. A bottom wall of the molding container has an inner surface formed with a recess or recesses. The wet gel is dried and shrunk to form a gap or gaps between the inner surface of the bottom wall and the gel on the way of drying and shrinking. The gap or gaps communicate with a space which occurs between an inner surface of a peripheral wall of the molding container and the gel on the way of drying and shrinking. A liquid layer, which is generated by the drying and shrinking of the wet gel, between the inner surface of the bottom wall and the gel on the way of drying and shrinking, accompanied with the drying and shrinking of the wet gel, is vaporized and removed to the ambient atmosphere through the gap or gaps and the space, according to which the gel on the way of drying and shrinking is dried.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.