| 摘要 |
PROBLEM TO BE SOLVED: To provide a cup shape vessel type filter for coffee, etc., used by folding and stretching the vessel main body, which can be stably mounted on a coffee cup. SOLUTION: One opening part frame body (2) formed with a sheet material with required rigidity, such as paperboard, is formed in a diameter smaller than that of the other frame body (3) with the bottom. The both frames are connected by a cylindrical shell part (5) formed with a sheet material of thin paper with suitable rigidity, flexibility, and shape keeping performance so as to form the cup shape vessel body part (1) in almost a truncated cone shape with a wide bottom part to enable the main body part to be mounted on a coffee cup. On the other hand, when not in use, the opening part frame body (2) is folded utilizing the flexibility of the shell part (5) contracted into the frame body (3) with a bottom and, when in use, the opening part frame body (2) is pulled up to make the vessel body (1) restore the cup shape to be usable. |
