Method and apparatus for coating fragile articles in a fluidized bed of particles using chemical vapor deposition
US4486473A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1983 |
| Grant date | Dec 4, 1984 |
| Priority date | — |
| Expiry date | Sep 21, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S118/05
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A massive article is coated by chemical vapor deposition in a chamber having a horizontal cross-sectional configuration generally matched to the horizontal cross-sectional configuration of the article. For an article which is relatively thin between a pair of opposed faces so that the article is subject to breakage by the force of surging particles of a fluidized particle bed, breakage is reduced in a coating chamber having vertical sidewalls that generally parallel the faces of the article and relatively narrow endwalls. The article is centered in the chamber with its faces parallel to the sidewalls leaving a region between the faces that accommodates an adequate flow of carrier gas and coating vapor without requiring a large charge of particles that would create undue surging force against the article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.