Process and apparatus for freeze-drying comprising means forming an active thermal shield between the freeze-drying shelves
US4953299A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1988 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | Nov 16, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF26B5/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention relates to a process and apparatus for freeze-drying, said apparatus comprising freeze-drying shelves disposed inside a freeze-drying enclosure, on which may be placed products or solutions to be freeze-dried, which may be contained in open recipients, as well as cooling and/or heating means associated with and preferably incorporated in said shelves, wherein means forming a thermal shield are disposed between said freeze-drying shelves, thus making it possible to slow down the heat exchanges between the surface of the product to be freeze-dried and the heating and/or cooling elements associated with the shelves. More homogeneous freeze-dried products are obtained in this way.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.