Method and apparatus for freezing products
AssigneeAir Products and Chemicals, Inc.
InventorsJeremy P. Miller, Colin D. Smith
Life of this patent
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Abstract
A freezer (1) which comprises a drum (2) is characterized in that a cylinder (12) is disposed in said drum (2), and a fan (14) is provided for circulating cryogen through the space (20) between the outer surface of the cylinder (12) and the inner surface of the drum (2). The outer surface of the drum (2) is provided with a plurality of grooves (4) of parabolic cross-section. In use, droplets (23) of liquid egg are dropped on to the grooves (4) where they freeze individually. The frozen particles fall away from the drum as they approach the lowermost point of travel of the drum (2) and form an attractive granular product.
Claims19
A freezer which comprises a drum, characterized in that a cylinder is disposed in said drum, and a fan is provided for circulating cryogen through the space between the outer surface of said cylinder and the inner surface of said drum, said freezer including means to inject and vent cryogen into and from said drum.
A freezer which comprises a drum, characterized in that a cylinder is disposed in said drum, a fan is provided for circulating cryogen through the space between the outer surface of said cylinder and the inner surface of said drum, means are provided for introducing liquid cryogen into the interior of said cylinder, said drum is provided with an outlet which projects inwardly from an end wall of said drum, said outlet is coaxial with said drum, and said outlet is disposed circumjacent said means for introducing liquid cryogen into the interior of said drum.
Dependencies are inferred from the claim text.