Kontinuierlich arbeitende Tiefkuehleinrichtung

1314895 Refrigerating PENNWALT CORP 20 July 1970 [15 Aug 1969] 35077/70 Heading F4H A continuous freezing apparatus for products in a liquid state comprises an endless freezing belt A, Fig. 1, having a cooling platen B supported beneath the undersurface of the upper run, which platen is supplied with a primary refrigerant of low viscosity through bores 26, Fig. 4, by a pump 38 in a closed circuit C which includes a heat exchanger 40, and a secondary refrigerant of higher viscosity is circulated through the platen by conduits 28 in alternating and heat exchange disposition with the bores 28 Laterally spaced ridges 24 extend upwardly from the surface of the platen and spaced transverse slots 30 are cut through the ridges which communicate via apertures 32 with the conduits 28 to allow the secondary refrigerant to percolate into contact with the belt and return for recirculation in an open circuit D by collection in a trough under and about the belt and fed by gravity through a drain 46 to a pump 42.