APPARATUS FOR COATING SUBSTRATES WITH INDUCTIVELY CHARGED RESINOUS POWDER PARTICLES

摘要

An apparatus for improving the electrostatic charge developed on a resin powder composition for electrostatic coating of solid objects and the method of application thereof. The apparatus comprises an electrode (28) for charging powder particles by electrical induction/conduction such that the powder particles have a resistivity of from about 109 to about 1013 ohm. meters at 20 % relative humidity and spraying the charged powder particles via a nozzle (24) onto grounded solid object (26) to which it adheres prior to the thermal fusing to produce a permanent finish.