Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1975-04-21
1977-05-03
Camby, John J.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 92, 219243, 219460, F26B 1900
Patent
active
040205630
ABSTRACT:
An apparatus for drying slab gels having a metal platen with electrical strip heaters mounted on one side thereof and a depression formed in the other side which serves as a drying chamber. The slab gel is laid on a sheet of porous filter paper over which is laid a sheet of non-porous material having non-adhesive qualities relative to the slab gel. The mounted and covered slab gel is placed in the depression and a compliant cover sheet is placed over the top of the depression overlapping the platen around the periphery of the depression. An open passage is formed through one edge of the platen in communication with the depression therein. The strip heaters are connected to an electrical power source and the open passage is connected to a vacuum source. The pressure in the depression is reduced relative to ambient pressure causing the compliant cover to be forced against the platen around the periphery of the depression for sealing the drying chamber. Moisture vaporized from the slab gel is removed through the open passage. A thermostat may be used to control the temperature of the platen and a timer may be used to provide for a predetermined period of heating and evacuation of the drying chamber. A temperature sensor may be placed in intimate contact with the slab gel for producing a signal to a relay for interrupting heater power when slab gel temperature rises through a predetermined temperature after substantially all of the moisture content has been vaporized from the slab gel.
REFERENCES:
patent: 1671493 (1928-05-01), Staege
patent: 2653394 (1953-09-01), Nelson et al.
patent: 2661543 (1953-12-01), Tyndall et al.
patent: 3176409 (1965-04-01), McKeever
patent: 3202278 (1965-08-01), Taylor
patent: 3253348 (1966-05-01), Oderman
patent: 3253351 (1966-05-01), Bettanin
patent: 3460266 (1969-08-01), Fleissner
patent: 3889389 (1975-06-01), Serup
Camby John J.
Hoefer Scientific Instruments
Schwartz Larry I.
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