| 摘要 |
<p>The door construction is obtained by making a door frame by bringing together extrusions (10) and connecting them to each other; thereafter placing a sheet (20,30) of an expanded cellular material within the confines of the door frame, the sheet being of a thickness such as to have one of its two large flat surfaces coplanar with first coplanar surfaces of the extrusions (10); and bonding a skin (24,31) not only to said first coplanar surfaces of the extrusions but also to said one large flat surface of the sheet (20,30). The other of the two large flat surfaces of the sheet (20,30) has bonded thereto a skin (21,32) which, in one embodiment, is sealingly secured to inside (unseen) surfaces of the extrusions (10) of the door frame or, in another embodiment, is bonded not only to second coplanar surfaces of said extrusions but also to said other of the two large flat surfaces of the sheet (20,30). <IMAGE></p> |
