Electric heating – Metal heating – Of cylinders
Patent
1975-05-06
1976-08-10
Grimley, Arthur T.
Electric heating
Metal heating
Of cylinders
219 1055A, H05B 904
Patent
active
039743551
ABSTRACT:
An organic product is located in a closed container in which a gas occupies the space inside the container above the product. The container is immersed into a liquid having a low dielectric loss factor, such as water, to such an extent that the liquid level is somewhat below the upper side of the product in the container. Using electrodes located to either side of the container, there is passed through the container from one side thereof to the other a first high-frequency electromagnetic alternating field having a respective first frequency such that the penetration depth of said first field is at least as great as the width of the container. From that side of the container at which the gas filled portion thereof is located, there is passed into the container through the gas and into the adjoining portion of the product a second high-frequency electromagnetic alternating field having a respective second frequency such that the penetration depth of the second field is small compared to the penetration depth of the first field.
REFERENCES:
patent: 2485660 (1949-10-01), Robertson
patent: 2823293 (1974-07-01), Gilliatt
patent: 2838640 (1958-06-01), Mann et al.
Grimley Arthur T.
Striker Michael J.
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