Method of extracting spin cast fused silica
US4964902A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1989 |
| Grant date | Oct 23, 1990 |
| Priority date | — |
| Expiry date | Feb 10, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B19/095
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to a method of making an object of silica glass, such as a crucible, according to which a pot capable of rotating about its axis is filled with a refractory pulverulent material. The pot is rotated and a cylindrical cavity is formed in the material, the axis of which coincides with that of the pot. The bottom and the wall of the cavity are then formed to a certain thickness with a silica-rich material. This silica-rich material is melted, the object thus produced is cooled and then extracted vertically by an extraction mechanism comprising a gripping member which is rotating, at least initially, at the same speed as the pot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.