Process for a uniform heating, pasteurization and sterilization of products by means of microwave
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United States of America Patent
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Aug 8, 1995
Grant Date -
N/A
app pub date -
Apr 5, 1994
filing date -
Apr 23, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a process for a uniform and fast heating of products by microwaves that are pulsed and introduced intermittently into the products, with the products to be treated, such as chemical or pharmaceutical products or foodstuffs, particularly ready-cooked meals, being conveyed by a continuously working endless conveyor belt through a treatment chamber in open or closed microwave-permeable trays and with the treatment chamber being equipped with microwave generator supply channels that are arranged in a vertical or inclined position relative to the conveyor belt. The line is operated at a microwave power profile that shortens the build-up time and breaking time of the microwave pulses, at a working frequency of 50 kHz that has an edge steepness of 2 microseconds, and with pulses the amplitudes of which have a rectangular form and the length of which is in the microseconds or milliseconds region.
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