Vacuum-type automatic dehumidifying and drying apparatus for pow

Details Vacuum-type automatic dehumidifying and drying apparatus for pow Vacuum-type automatic dehumidifying and drying apparatus for pow

1999-10-26

2000-12-26

Gravini, Stephen

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 92, 34168, F26B 2106

Patent

active

061639761

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.

REFERENCES:
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patent: 4294020 (1981-10-01), Evans
patent: 4882851 (1989-11-01), Wennerstrum et al.
patent: 5048200 (1991-09-01), Ryham
patent: 5205050 (1993-04-01), Masaki et al.
patent: 5335425 (1994-08-01), Tomizawa et al.
patent: 5341576 (1994-08-01), Tsutmo et al.
patent: 5548905 (1996-08-01), Kuma et al.

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