(19)
(11) EP 0 697 255 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.12.1996 Bulletin 1996/51

(43) Date of publication A2:
21.02.1996 Bulletin 1996/08

(21) Application number: 95112883.4

(22) Date of filing: 16.08.1995
(51) International Patent Classification (IPC)6: B05B 5/053
(84) Designated Contracting States:
DE GB SE

(30) Priority: 17.08.1994 JP 193265/94
17.08.1994 JP 193275/94
18.08.1994 JP 194430/94

(71) Applicants:
  • CHICHIBU ONODA CEMENT CORPORATION
    Minato-ku, Tokyo 105 (JP)
  • Nippon Paint Co. Ltd.
    Osaka-shi Osaka-fu (JP)

(72) Inventors:
  • Yanagida, Kenzo
    2-chome, Koto-ku, Tokyo (JP)
  • Yamamoto, Masahiro
    2-chome, Koto-ku, Tokyo (JP)
  • Kumata, Mituyoshi
    2-chome, Koto-ku, Tokyo (JP)
  • Kondo, Atsushi
    2-chome, Koto-ku, Tokyo (JP)
  • Tsutsui, Koichi
    Neyagawa-shi, Osaka (JP)
  • Libke, Shannon
    Neyagawa-shi, Osaka (JP)

(74) Representative: Pellmann, Hans-Bernd, Dipl.-Ing. 
Patentanwaltsbüro Tiedtke-Bühling-Kinne & Partner Bavariaring 4
D-80336 München
D-80336 München (DE)

   


(54) Method and apparatus for electrostatic powder coating


(57) An electrostatic powder coating method whereby free ions in the vicinity of a spray gun are trapped and the fine powder, which has a particle diameter of 25 µm or less, is electrostatically charged and applied to the surface of an electrically grounded object to be coated. An electrostatic powder coating apparatus which is equipped with an electrostatic gun for electrostatically charging fine powder, which has a particle diameter of 25 µm or less, and spraying the charged fine powder to the surface of the electrically grounded object to be coated, and a free ion trapping device for trapping free ions near the electrostatic gun.






Search report