Patent ID: 7544059

Claim:
Door sealing device for an industrial furnace which is vertical and opened vertically, characterized in that each one of the side edges ( 4 a , 4 b ) of the door ( 3 ) is arranged to run within and along a respective elastic tube ( 5 a , 5 b ) that has a longitudinal slit ( 6 a , 6 b ) and extends vertically, in that each tube is fixed in relation to the furnace, in that the tubes ( 5 a , 5 b ) are designed to spring back towards a respective position in which the slit ( 6 a , 6 b ) is closed, and arranged to enclose the side edge ( 4 a , 4 b ) of the door ( 3 ) along essentially the whole length of the side edge ( 4 a , 4 b ) when the door ( 3 ) is in its closed position, and in that a liquid coolant is arranged to stream through the tubes ( 5 a , 5 b ) and essentially fill up the whole space defined by the combination of the inner surfaces of each tube ( 5 a , 5 b ) and the outer surfaces of the respective side part of the door ( 3 ).