| 摘要 |
PURPOSE:To reduce the variation in negative pressure to a wall thickness without increasing an inner volume of a slit bladder by a method wherein a ratio of a diameter of an opening part for fitting a slit bladder to a curvature of a side wall part is made to be a specific value or over. CONSTITUTION:A liquid reserving tank is obtained wherein a dome like or a semispherical partition wall composed of an elastic material as a pressure regulating means is provided to a supply part for supplying liquid in a tank, and a slit 110 which closes in an ordinary state and opens by deformation of the partition wall by a specific difference in pressure are provided and where R1 as a radius of a fitting opening part of the partition wall, R2 as the curvature of the side wall, and R3 as a curvature of a crest part are taken, 1<=R2/R1 and R1>=R3 are satisfied. |
