Patent ID: 7685949
Filing Date: 2010-03-30
Classification: F27D

Abstract:
1. A feeding door of a heat treatment furnace comprising: a box having a chamber for holding an object that waits for drying, said box having at least a breach; at least a starter fixed on an outer lateral of said box; and a door plank comprising at least a first and second pivotally coupled door plate joined together by a pivoting connection located between the first door plate and the second door plate, said first door plate is pivotally coupled with said box above said breach, wherein said door plank is upward or downward shifted for being opened or closed, wherein said first door plate includes at least a protrudent ear mounted to a location adjacent a lateral edge in a position underlying said starter, wherein said starter is linked to said protrudent ear to lift said first door plate, said entire second door plate being lifted upwards and away from said box by said pivoting connection, when said first door plate is lifted, wherein the second door plate is configured to swing freely from said pivoting connection.