A method and an apparatus for production of frozen...

A - Human Necessities – 23 – G

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A23G 9/18 (2006.01) A23G 9/14 (2006.01) A23G 9/16 (2006.01) A23G 9/22 (2006.01) A23G 9/26 (2006.01)

Patent

CA 2258922

Conventionally, edible ice bodies are frozen in freezing moulds that are moved through a bath of cold salt brine, which ensures a good freezing effect, but also presents obvious problems. For avoiding these problems it has already been endeavoured to use cold air instead, but so far without noticeable practical success. The invention provides for an efficient and economical freezing by cold air, viz. in suggesting that the transverse carrier lamella plates (2) for rows of aluminium moulds (8) in an endless lamella conveyor are advanced stepwise into positions, in which cold air from underlying slot nozzles (46) is blown up into the spaces between the rows of moulds in a manner effectively shielded from the surroundings.

Les glaces comestibles sont habituellement surgelées dans des moules de surgélation puis passées dans un bain de saumure froide qui assure un bon effet de surgélation mais comporte également des inconvénients évidents. Pour éviter ces inconvénients on a déjà tenté de remplacer la saumure par de l'air froid mais jusqu'ici sans résultat concret. La présente invention concerne un procédé efficace et économique de surgélation à l'air froid consistant à faire avancer les plaques de transport à lamelles transversales (2) d'un transporteur circulaire portant les rangées de moules en aluminium (8) par étapes dans des positions dans lesquelles de l'air froid est soufflé par des buses à fente (46) placées sous le transporteur dans les espaces compris entre les rangées de moules, ce procédé étant efficacement abrité du milieu ambiant.

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