| 摘要 |
PROBLEM TO BE SOLVED: To provide a cup-shaped paper container having a bottom face with good flatness, which does not burn even when heated directly in a microwave oven.SOLUTION: A cup-shaped paper container is built by sealing a trunk seal portion of the blank comprising a laminated material having a paper layer and thermoplastic resin layers provided on both faces of the paper layer, bending four vertical ruled lines, and folding a bottom face portion to form a trunk part having a lower portion in a rectangular shape and an upper portion in a widened shape. In the cup-shaped paper container, the blank has the bottom face portion and a bottom seal portion provided sequentially and continuously from the lower portion of the trunk part via ruled lines. In the bottom face portion, a triangular bottom face plate having a long side continuously connected to the lower portion of the trunk part, a rectangular bottom face plate, and a fold-in bottom face plate continuously connected to one side of the rectangular bottom face plate and one of short sides of the triangular bottom face plate are arranged via ruled lines. A ruled line forming the long side of the triangular bottom face plate bulges by an offset width to the trunk part side to form a bottom-face-corner offset ruled line. |
