Electric heating – Microwave heating – Tunnel furnace
Patent
1993-10-14
1995-07-25
Leung, Philip H.
Electric heating
Microwave heating
Tunnel furnace
219701, 219686, 219725, 99451, 99443C, 426243, H05B 678
Patent
active
054364329
ABSTRACT:
A new microwave autoclave apparatus, and a method for pasteurizing, sterilizing or retorting food product in a continuous mode, and in commercial quantities, using microwave radiant energy. In this new microwave autoclave apparatus, containers of food-stuff are held tightly within individual moving bottom vessel, and a corresponding moving top cover. The moulds therefrom, made of a material which is permeable to microwave radiation, are linked together to form a chain such that a continuous flow of container enters and leaves a microwave chamber. The synchronization of the moving top covers with the moving bottom vessels, and the opposing forces applied thereupon provide tightly fitted cavities capable of supporting substantial pressure, and thus providing a retort effect. The moulds prevent undesired expansion of containers during heating periods, without applying adverse pressure beyond its original shape during the cooling phase.
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