Vacuum-type automatic dehumidifying and drying apparatus for powdered or granular material
US6163976A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1999 |
| Grant date | Dec 26, 2000 |
| Priority date | — |
| Expiry date | Oct 26, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29B9/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A vacuum-type automatic dehumidifying and drying apparatus for powdered or granular material such as a pelletized or powdered resin or the like, provided with a drying hopper connected to an evacuating means having at its bottom a material discharge valve, and provided with a material collector communicating with the drying hopper via a material feeding valve above the drying hopper for collecting the powdered material therein. The apparatus comprises a double constructed drying hopper having a cylindrical main body made of a high heat conductivity material provided on its inner peripheral surface with plural fins, which define compartment walls, projecting inwardly and provided on its outer peripheral surface with a heating means surrounding the cylindrical main body. The main body is outwardly enclosed with a heat insulation wall, and comprises an outer air inlet for introducing outer air thereinto, a material sensor for detecting amount of the material stored in the hopper, and an evacuating means connected to the main body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.