US Patent 7546962 Electrostatic coating apparatus

An atomizer, provided with an air motor and a rotary atomizing head is mounted on a front side of a housing member. An external electrode assembly, provided with support arms, electrode support members and acicular electrode members is mounted on the outer side of the housing member. A high voltage is supplied to acicular electrode members by a high voltage generator. Electrode support members are covered by a tubular cover member formed of an insulating resin film. An annular gap space is formed between the cover member and electrode support members.