Patent ID: 7357131

Claim:
An air curtain door system for an oven comprising: (a) a door panel having an interior panel and an exterior panel, said door panel including: an access opening at an upper portion thereof; a mantle attached to a bottom end of said access opening, said mantle extending horizontally along a width of said access opening and extending toward an interior side of said door panel beyond said interior panel; said mantle having an air outlet slot positioned at said interior side of, and adjacent to, said door panel, said air outlet slot extending horizontally along said access opening; an air inlet opening on said interior panel near a lower end of said door panel; a hollow chamber between said interior and exterior panels disposed from said mantle to near said lower end of said door panel; a bottom portion of said hollow chamber connecting to said air inlet opening; and a top portion of said hollow chamber having an air outlet section underneath said mantle; and said air outlet section being formed by extruding of a top portion of said interior panel toward said interior side of said door panel and connecting to a bottom side of said mantle at an interior side of said air outlet slot, and said air outlet section extending horizontally along said mantle; thereby said air outlet slot being an outlet of said hollow chamber; (b) an air supply means located near said lower end of said door panel, and interfacing with said air inlet opening for providing air supply to said hollow chamber through said air inlet opening; and (c) an exhaust venting assembly located at said interior side of, and adjacent to an upper end of, said door panel, for pulling air exiting from said air outlet slot of said mantle into said exhaust venting assembly, thereby forming an air curtain covering said access opening at said interior side of said door panel.