| 摘要 |
PROBLEM TO BE SOLVED: To provide a paper cup-shaped container with heat insulation property. SOLUTION: In a heat insulation paper cup of double structure, a paper cup body having an outwardly curled portion formed over the entire circumference of an upper opening part of a cylindrical barrel portion of a truncated conical body is fitted in a cylindrical exterior material analogous to the paper cup body, having the diameter slightly larger than that of a barrel portion of the paper cup body, and having an inwardly folded-in portion over the entire circumference of upper and lower opening parts, and a space portion of a substantially uniform distance is formed between an outer wall of the paper cup body and an inner wall of an exterior cylindrical body which are separated from each other by abutting both inwardly folded-in portions of the cylindrical exterior material on the outer wall of the paper cup body. COPYRIGHT: (C)2004,JPO&NCIPI
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