| 摘要 |
PURPOSE:To improve stirring action, by making the area of opening of an upper slit of a well the narrower the higher the position of the liquid surface and the wider the lower the position, and adjusting the degree of opening of the upper slit to the liquid surface by moving a mask-well up and down. CONSTITUTION:Upper slit 13' is provided at the upper part of cylindrical, fixed well 13 and lower slit 13'' at the lower part, each opening at a nearly equal distance in the circumferential direction. The width of opening of upper slit 13' is made larger as it goes down in a wedge from. Mask well 14 is connected, via connecting member 16, to a plurality of floats 17 which float on the surface of a liquid being stirred and slide along well 13. Guide 18 prevents connecting member 16 from swinging and at the same time faciliates the floating of floats 17. The liquid is stirred by stirring wing 14 which is driven by a motor. |
