Patent ID: 6878207
Filing Date: 2005-04-12
Classification: B01J,C23C,F16J

Abstract:
1. An apparatus for the interconnecting a first region having a gaseous pressure and a second region having a gaseous pressure, wherein the gaseous pressure of said first region is different from the gaseous pressure of said second region, said apparatus comprising: a gas gate interconnecting said first region and said second region, said gas gate comprising, a cylinder, having a top peripheral portion and a bottom peripheral portion, set in a housing through which a web of substrate material is adapted to move between said first region and said second region, said web maintaining contact with the top peripheral portion of said cylinder to create a top gap between said web and said housing, said gas gate providing for choke mode transonic flow of air leaks between said first region and said second region; at least one roller positioned in said first region, said at least one first region roller adapted to guide said web into said top gap; at least one roller positioned in said second region, said at least one second region roller adapted to guide said web out of said top gap; and at least one means for evacuating at least one of said first region and said second region.