Patent ID: 6523928
Filing Date: 2003-02-25
Classification: B41J

Abstract:
A method of applying a treatment material to a substrate, comprising the steps of:providing a dry gas propellant to a head structure, said head structure having more than one channel therein, each said channel having exit orifice with a width no larger than 250 &mgr;m through which said dry gas propellant may flow, said dry gas propellant flowing through each said channel to thereby form a substantially steady state dry gas propellant stream therein having kinetic energy, each said channel directing said substantially steady state dry gas propellant stream therein out through said exit orifice and toward said substrate; and controllably introducing a treatment material into at least one of said substantially steady state dry gas propellant streams; the kinetic energy of said substantially steady state dry gas propellant stream into which said treatment material is introduced causing said treatment material to impact said substrate.