| 摘要 |
PROBLEM TO BE SOLVED: To set the filter in an extract recessed part having a peculiar shape to allow it to be used for filtering, by standing a peripheral wall from the periphery of the bottom, substantially vertically standing the peripheral wall of a standing part from a shorter side of the rectangular bottom, and roundly expanding the peripheral wall upward as a whole. SOLUTION: A filter 1 has a substantially rectangular bottom 2, a peripheral wall 3 stands upward from the periphery of the bottom 2, a part 3' of a peripheral wall standing from one shorter side 4 of two shorter sides 4, 5 facing to each other of the rectangular bottom 2 stands substantially vertically, and the peripheral wall 3 has a deformed cup shape where it roundly expands upward as a whole. An angle θ relative to a horizontal surface of a peripheral wall of a filter 1 is 90 deg.<=θ<=97 deg. in the part 3' of the substantially vertically standing peripheral wall based on volume efficiency, filtering function, adequacy to an extract recessed part, and operability, and 100 deg.<=θ<=115 deg. in the peripheral wall 3 of the filter 1 which roundly expands upward as a whole. |
