(57) It is described a novel powder charging apparatus, wherein a high voltage is applied
between a couple of electrodes, consisting of a plasma electrode of required polarity
and a plasma electrode of opposite polarity, to form plasma attip of each of electrodes,
an eventually finely dispersed powder is made to pass only through an area wherein
mainly ones of negative and positive ions derived of said plasma, that is, ions of
required polarity exist, and thereafter the charged powder is discharged. In this
apparatus, the adhesion of pow- derto each electrode is prevented and charging performance
is maintained for a long time. It is also described an electrostatic powder coating
apparatus comprising the above- described novel powder charging apparatus, which is
excellent in performance for making thick coating, depositing efficiency and throwing
power.
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