Food dehydrating machine
US4192081A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1977 |
| Grant date | Mar 11, 1980 |
| Priority date | — |
| Expiry date | Jun 15, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F2007/1808
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.