Electric heating – Metal heating – Of cylinders
Patent
1981-03-23
1982-09-07
Grimley, Arthur T.
Electric heating
Metal heating
Of cylinders
219 1055M, 219 1055E, H05B 678
Patent
active
043485723
ABSTRACT:
An emulsion is stored in pressure containers and is ultimately forced from one container and then the other to a pump which pumps the emulsion against back pressure of the food product into a long Teflon tube of large diameter. The tube passes through cavities in plural microwave ovens and is cured by microwave energy from two magnetrons in each oven operating at about 2,450 megahertz and 1,000 watts each. The flow rate is controlled by the pump so that the food product remains in the microwave energy field for about 4 to 5 minutes whereupon it is fully cured. The continuously flowing food product in the tube is surrounded by a hot oil heat exchanger which heats the surface to about two to five hundred degrees Fahrenheit, while the product is radially constrained and is under back pressure. The tube passes through a cooling heat exchanger immediately after the heater whereupon the surface is cooled to about 40.degree. Fahrenheit while radially constrained and under pressure, thus forming a smooth self-skin. Initial back pressure is assured by a plug which the food product forces through the tube until the tube is full to provide the autogenic back pressure. The back pressure provided by the resistance to flow of the moving mass and the frictional resistance of the product-tube innerface decreases as the product nears the end of the apparatus. At the end of the apparatus the cooled product is sliced and wrapped or cut in lengths to be sliced elsewhere.
REFERENCES:
patent: 2620172 (1952-12-01), Jenett et al.
patent: 3537385 (1970-11-01), Puschner et al.
patent: 4006338 (1977-01-01), Dehn
patent: 4006339 (1977-02-01), Maurer
patent: 4129768 (1978-12-01), Anderson
Grimley Arthur T.
Wray James C.
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