| 摘要 |
PROBLEM TO BE SOLVED: To tightly adhere between a heater and a container bottom part suitably and to improve heating efficiency and durability. SOLUTION: A recessed part 3 projecting upwards and opened downwards is formed on the bottom wall 2 of a metallic container 1. Content fluid is heated by the heater 4 abutted on the lower surface of the ceiling wall 3a of the recessed part 3, stored, and supplied for use. For a curved shape projecting downwards to be given to the ceiling wall 3a of the container 1, the curvature of a peripheral part 3a2 is small, the curvature of an inner side 3a3 is large, and the curve of the inner side 3a3 is formed from a starting point 3c around a center part 3a1 almost tangential to a plane A perpendicular to the axis 41 of the container 1 toward the periphery. COPYRIGHT: (C)2005,JPO&NCIPI
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