Electrostatic coating apparatus

• US 3,336,903 A
• Filed: 04/21/1964
• Issued: 08/22/1967
• Est. Priority Date: 04/24/1963
• Status: Expired due to Term

• Current Assignee: Point Marcel A R
• Original Assignee: Point Marcel A R
• Inventors: POINT MARCEL A R
• Application Number:
  US04/361,365
• Time in Patent Office: 1,218 Days
• US Class Current: 118/624
• CPC Class Codes: B05B 5/0533 Electrodes specially adapted therefor; Arrangements of electrodes
• CPC Class Codes: B05C 19/002 Electrostatic flocking see for electrostatic projection or pulverisation B05B
• CPC Class Codes: B05C 19/025 Combined with electrostatic means
• CPC Class Codes: Y10S 118/05 Fluidized bed

Claims

1. APPARATUS FOR COATING ARTICLE WITH A FINELY DIVIDED COATING SUBSTANCE COMPRISING, IN COMBINATION, MEANS FOR FORMING A FLUIDIZED BED OF THE FINELY DIVIDED COATING SUBSTANCE ADJACENT A SURFACE OF THE ARTICLE TO BE COATED, CHARGING ELECTRODE MEANS IN JUXTAPOSITION WITH SAID FLUIDIZED BED FOR APPLYING A FIRST ELECTRICAL POTENTIAL TO THE INDIVIDUAL PARTICLES OF COATING SUBSTANCE THEREIN, MEANS FOR CONNECTING SAID ARTICLE TO SECOND ELECTRICAL POTENTIAL, TO ESTABLISH AN ELECTROSTATIC FIELD BETWEEN SAID PARTICLES AND THE SURFACE OF SAID ARTICLE, THE THUS CHARGED PARTICLES BEING GUIDED BY ELECTROSTATIC ATTRACTION TOWARD SAID SURFACE, AND CONTROL ELECTRODE MEANS AT A POTENTIAL DIFFERENT FROM SAID FIRST POTENTIAL AND POSITIONED IN SPACED RELATION WITH SAID CHARGING ELECTRODE MEANS FOR CONTROLLING THE SPATIAL EXTENT OF SAID FLUIDIZED BED.