Electrostatic air/powder stripe applicator

Coating apparatus – With means to apply electrical and/or radiant energy to work... – Electrostatic and/or electromagnetic attraction or...

Patent

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Details

118306, 118317, 118308, 427 28, 427181, 427236, 427286, 427424, B05B 502, B05C 502

Patent

active

042156483

ABSTRACT:
A powder applicator for applying powder to form a side stripe to the interior of can bodies along side seams thereof. The powder applicator includes a device for providing a layering effect on the gas entrained powder so that although the powder is normally carried by the gaseous stream it is directed into an orifice of a nozzle as a dense stream with the carrier gas forming a separate layer. In addition, the applicator forms a seal with the interior of the can body to define a limited sealed area within which the powder may pass. This sealed area contains corona charging pins which are arranged in a longitudinal line so that a maximum charging of the powder may be effected. Also, a diffused gas is directed into the sealed area to prevent the powder from clinging to the side walls of the sealed area and the charging pins.

REFERENCES:
patent: 3545996 (1970-12-01), Duncan
patent: 4098226 (1978-07-01), Furter

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