Process of coating of particles, particularly particles of medicinal drugs, and apparatus for implementation of the process
US4476804A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1983 |
| Grant date | Oct 16, 1984 |
| Priority date | — |
| Expiry date | Jan 28, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process and apparatus for coating particles, particularly particles of medicinal drugs. The apparatus has a rotating drum provided with a perforated cylindrical center section. Particles to be coated are introduced into the interior of the drum and form a layer in a lower quadrant of the cylindrical section during rotation of the drum. A spraying device is located in the interior of the drum for coating the particles with an appropriate mixture or solution. A device is positioned adjacent the portion of the drum containing the particles for introducing gas through the perforations into the layer of particles so as to dry the particles. A device also is provided for removing gas from the drum through the perforations. The device for introducing gas can be separated from the device for removing gas by a central partition, with both devices being carried by a common support. Also, it is possible to introduce gas into a portion of the interior of the drum that is spaced from the layer of particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.