Patent ID: 9266128
Filing Date: 2016-02-23
CPC Classification: B01D,B05B,B05D

Claim Text:
1. A method for electrostatic coating of a substrate ( 1 ), comprising the steps of: supplying a working fluid at between 0.5 bar and 10 bar in a container ( extracting from said container ( atomizing said flow of working fluid and powder with a jet of working fluid at a pressure of between 0.5 bar and 10 bar; supplying working fluid at a pressure of between 0.5 bar and 10 bar to create a second transport flow made up of working fluid and atomized powder; charging said second flow of working fluid and atomized powder electrostatically under pressure; and sending said second flow of working fluid and atomized electrostatically charged powder onto a substrate ( said method being characterized in that: said working fluid is a mixture made up of nitrogen in a range of 80-98%, oxygen in a range of 1-19%, argon in a range of 1-2%, wherein oxygen and argon together are in a range of 2-20%; said mixture is obtained continuously during coating by taking environmental air and depriving it of residual substances not comprised in a natural composition of the environmental air; and said mixture is electrostatically pre-charged upstream of entry into said container with positive and/or negative ions according to the desired final electrostatic charge.