Drying and gas or vapor contact with solids – Apparatus – Houses – kilns – and containers
Patent
1977-06-15
1980-03-11
Weakley, Harold W.
Drying and gas or vapor contact with solids
Apparatus
Houses, kilns, and containers
34238, 34233, 99483, A47G 2304
Patent
active
041920813
ABSTRACT:
A machine for dehydrating food, as an aid toward preservation of food for extended periods of time. Intake air may be obtained from either the exterior of the machine or a combination of exterior and recycled air. Intake air is electrically heated and pressurized in a plenum chamber by a fan. The pressurized and heated air is released in a uniform laminer flow through a set of small openings, thence along horizontally disposed shelves containing the food to be dried. The air is then selectively discharged into the atmosphere or a portion thereof is recycled and combined with new intake air and again passed over the food to be dehydrated. The percentage of recycled air is selectively variable over a wide range. Removable frames support either solid sheets or screens having mesh openings of desired sizes which support the food to be dried. The choice of a solid sheet or the mesh size depends upon the type of food to be dried. The intake air is filtered and the electrical heater is temperature controlled by a thermister-triac combination of bi-metallic thermostat which senses the temperature within the plenum and controls the current flowing through the electrical heating element.
REFERENCES:
patent: 1889880 (1932-12-01), Smith
patent: 1954239 (1934-04-01), Doherty
patent: 2606372 (1952-08-01), Foulder
patent: 3261650 (1966-07-01), Stromqvist
patent: 4030476 (1977-06-01), Hock
Dornbush David A.
Erickson Chad S.
Alternative Pioneering Systems Inc.
Friederichs Norman P.
Weakley Harold W.
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