| 摘要 |
738,970. Heat insulation. GENERAL ELECTRIC CO. Dec. 30, 1953 [Dec. 30, 1952], No. 36238/53. Class 64 (2). In making a vacuuminsulated cabinet having an inner liner 2 and outer casing 1, compressible heatinsulating material 4 which is thicker than the space between the liner and casing is placed on the outer surface of the liner and at least partially enclosed by a flexible sheath 9. The liner, insulating material and sheath are then forced into the casing, which is caused to bulge outwardly as shown. The liner and casing are temporarily sealed together at their top edges, e.g. by polyvinyl adhesive tape 12, and the space between is evacuated through the pipe 13. Atmospheric pressure causes the casing to resume its original shape. The casing and liner are then welded together at 14, and their parts above the weld are cut off. A block 11 is inserted into the liner before assembly to maintain its shape and to force it and the insulating material and sheath into the casing. A flared mouth 5 on the casing facilitates assembly. The sheath 9 may comprise metal strips or two metal sheets bent to U-shape so as to extend across the bottom and up the sides. Specification 715,174 is referred to. |
