Coke oven door

Claim 1

In a self-sealing coke oven door having an inner adiabatic door plug and an outer metallic door body, a latch bar connected to said door body, complementary latching hooks for engaging said latch bar for securing said oven door in the closed position, and a door seal circumscribing the periphery of said oven door, the improvement comprising: a base plate connected to said metallic door body, a guard plate spaced from said base plate, said guard plate being disposed between said adiabatic door plug and said base plate, an adiabataic layer disposed in the space between said base plate and guard plate, said guard plate shielding the entire inner surface of said adiabatic layer, a sealing means in the form of a knife-like sealing edge circumscribing said guard plate, said knife edge seal being adapted to engage a door frame defining an oven door opening, and said knife edge seal having a series of circumferentially spaced U-shaped slots formed therein opposite said sealing edge, and having projections disposed on the outer surface of said seal on both sides of said slots, and a plurality of means for adjustably biasing said sealing means into sealing position, said biasing means including a seal depressor engaging said edge seal, a spring biasing said depressor, and hook shaped levers adjacent said biasing means for engaging said projections to resist the spring bias acting on said seal means when the door is moved to an opened position.