| 摘要 |
<p>A closure consists a metal door and frame, where the door is constructed from two metal trays or plates (2, 3) attached together at their edges by various folding and sealing members. The first arrangement is where the lateral and/or the upper edges of the inner panel has two right angle bends, and the outer panel has four right angle bends. Alternatively the lateral and or upper edges of the inner panel can have two right angle bends, and the outer panel can have three right angle bends and one oblique angle bend. Both of these alternative arrangements give rise to recess into which a sealing member (6) can be inserted. The frame is formed from two parallel metal sections which can be thermally isolated from one another by means of separator clips or staples, or having fixing elements passed through thermally isolating bushes.</p> |
