公开(公告)号：US3698636A

公开(公告)日：1972-10-17

申请号：US3698636D

申请日：1971-04-23

Applicant: GRACO INC

Inventor： SZASZ IMRE

IPC: B05B5/10 ,  B05B5/00

CPC classification number: B05B5/10

Abstract: A material coating system to apply charged materials to objects to be coated by electrostatic spray guns. The spray gun itself has a double cone-shaped deflecting member in its barrel and an adjustable collar on its barrel to change the spray pattern. An internal electrode in the material conveying tube charges the material and a wound wire ground connection attached to the gun prevents an accumulation of charge at the gun. A material storage bin with multiple venturis feeds material to the gun by suction via its conveying tube. In addition, a polarity reversing circuit allows the power source to apply different charges to sprayed materials.