Method for the homogeneous complete encapsulation of individual

Details Method for the homogeneous complete encapsulation of individual Method for the homogeneous complete encapsulation of individual

1980-11-17

1984-01-31

Silverberg, Sam

Coating processes

Fraud or tamper detecting

118303, 118 19, 427213, B32B 702

Patent

active

044289731

ABSTRACT:
Method for the uniform, fully enclosing surface coating of individual particles of pourable materials having nearly uniform particle size with either a smooth, rough or scabrous serrated surface, in a fluidizing fountain with heat air under use of an inorganic and or organic coating material in the form of a suspension or solution. A predetermined quantity of the material is to be coated within a steep funnel-like upwards enlarged container, having a shorter less steep funnel-like lower segment located at the bottom of the upwardly enlarged container through injection of a heat air stream at controlled velocity in ascending vertical direction, forming a fluidized fountain of limited height and diameter incident to the middle axis, thereby forming a core zone; with injection from below and in the same direction as the heat air through one or several injection nozzles, located at the lower end of the container of the suspension or solution facing in an upward direction. The steep funnel-like, upwards enlarged container has either a circular or polygonal configuration whose upper portion constitutes a body of increasing diameter. The container is equipped at the upper and lower end with screen closures consisting of exchangeable screens of maximum free area with a mesh size smaller than the smallest particle of the material to be coated.

REFERENCES:
patent: 3112220 (1963-11-01), Heizer
patent: 3231413 (1960-01-01), Berquin
patent: 3386182 (1960-06-01), Lippert
patent: 3880116 (1975-04-01), Paillig

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