Patent ID: 6652654
Filing Date: 2003-11-25
Classification: B05D,C03C,D06B

Abstract:
A system configured for applying multiple modifying agents to a continuous substrate, substantially isolated from a surrounding atmosphere, comprising:a first processing chamber configured for applying a first modifying agent to the continuous substrate, said first processing chamber comprising a first region, a second region, and a constricted medial region between said first region and said second region, said first processing chamber being further configured to accept a first treatment mixture into said constricted medial region during continuous movement of said continuous substrate through said first processing chamber, said first treatment mixture comprising the first modifying agent in a first carrier medium, said first carrier medium being selected from the group consisting of a supercritical fluid, a near-critical fluid, a superheated fluid, a superheated liquid, and a liquified gas, such that said first modifying agent separates from said first carrier medium upon a pressure drop when said first treatment mixture is introduced into said constricted medial region, applying said first modifying agent to said continuous substrate; a second processing chamber configured for applying a second modifying agent to said continuous substrate after the first modifying agent is applied to said continuous substrate; a first end seal disposed adjacent to the first processing chamber configured for substantially isolating fluids present in the first processing chamber from the surrounding atmosphere; a second end seal disposed adjacent to the second processing chamber configured for substantially isolating fluids present in the second processing chamber from the surrounding atmosphere; and a passageway configured for allowing continuous passage of the continuous substrate through the first end seal, the first processing chamber, the second processing chamber, and the second end seal in series.