| 摘要 |
PURPOSE:To shut off the outdoor air during stirring of liquid and to obviate the intrusion of dust, etc., therein by attaching a movable plate consisting of a permanent magnet to a supporting shaft erected in a vessel and moving the above-mentioned movable plate upward and downward by the magnetic force of an electromagnet disposed to the bottom surface of the vessel. CONSTITUTION:The movable plate 2 attached to the supporting shaft 3 is formed of the permanent magnet and the movable plate 2 is moved upward and downward by the magnetic force of the electromagnet 4 disposed to the bottom surface of the vessel 1. The need for moving the supporting shaft 3 upward and downward is thereby eliminated and further the supporting shaft 3 can be provided to the inside of the vessel 1 by a supporting base 31, etc. As a result, a cap 5 can be attached to the upper part of the vessel by which the liquid 7 in the vessel 1 can be stirred while the liquid is held shut off from the outdoor air. Since the vertical movement of the movable plate 2 is executed by the effect of the permanent magnet to constitute the movable plate 2 and the electromagnet 4, the generation of noise and heat during the long-term stirring is obviated. |
