Electric heating – Metal heating – Of cylinders
Patent
1990-05-04
1993-04-27
Reynolds, Bruce A.
Electric heating
Metal heating
Of cylinders
219 1055E, 219 1055A, 219 1055M, 366247, 366274, H05B 680
Patent
active
052064794
ABSTRACT:
A microwave heating system which is especially useful for rapidly, uniformly and positively sterlizing biological media, such as broths and gels used as incubation or growth media for bacteria, includes a source of microwave radiation, a microwave chamber, a container or a plurality of containers in the chamber, and a mixer for mixing the contents of the container or containers during heating. The mixer is at least partially external to the container and is capable of operating when the container is positively sealed to prevent contamination of the contents, and the mixer is preferably a combination of an external magnet and a mixing element which is at least in part of magnetic material and is moved by changes in the magnetic field set up by the magnet, as the container and contained mixing element are moved with respect to the magnet, as on an oscillating turntable. Other systems for mixing the material in the container are also within the invention, although they are not as satisfactory as that previously described, and such other systems include mechanical systems, such as solenoid activated cores or extensions thereof for pushing vertically against a turntable and thereby moving it out of its normal horizontal plane, cams for accomplishing the same purpose, devices for causing the containers to swing, in pendulum-like motion, as they are rotated, and ultrasonic devices. The apparatus may be used for various other heating operations and even for mixings, without heatings.
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Hargett Wyatt P.
Manchester Dennis P.
Neas Edwin D.
Zakaria Zairani
CEM Corporation
Kramer Raymond F.
Reynolds Bruce A.
To Tuan Vinh
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