Apparatus for applying plastic coatings to small bodies

Details Apparatus for applying plastic coatings to small bodies Apparatus for applying plastic coatings to small bodies

1974-08-12

1976-06-29

Stein, Mervin

Coating apparatus

Immersion or work-confined pool type

Tumbling particulate work

118425, 118429, 427185, B05C 308

Patent

active

039658589

ABSTRACT:
Small workpieces to be coated with plastic material are preheated and dropped onto a fluidized bed of plastic powder subjected to compound vibratory motion which causes the powder and the workpieces to move along a helical ramp onto a screen overlying the point of entry, with some of the particles fusing onto the workpiece surfaces to form a film. The remainder of the powder, on reaching the screen, drops back onto the bed as the coated workpieces move on to a receptable. Fresh workpieces are deposited on the bed through one or more chutes traversing the screen; to prevent the rise of any particles through the chutes, a downward airflow is created therein.

REFERENCES:
patent: 2654465 (1953-10-01), Sgriccia
patent: 3097958 (1963-07-01), Morris
patent: 3117064 (1964-01-01), Friedrich
patent: 3197328 (1965-07-01), Jung et al.
patent: 3567485 (1971-03-01), Lemelson

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