| 摘要 |
PURPOSE:To supply fixed quantity of a releasing agent by inserting a discharge exit of the lower part of a closed auxiliary tank, where the releasing agent is put, to the upper face of the releasing agent in a main tank and opening this discharge exit with respect to a device which applies the releasing agent in the main tank through a porous tape consisting of a polytetrafluoroethylene resin. CONSTITUTION:A discharge exit 10 in the lower part of a closed auxiliary tank 9 where a releasing agent 6 is put is inserted into the releasing agent 6 from a releasing agent free surface 8, namely, the upper face in a releasing agent open-type main tank 5 and is opened. Then, air pressure acts always upon the releasing agent free surface 8 in the main tank 5, and the releasing agent 6 is reduced, and bubbles of air enter into the auxiliary tank 9 when the free surface 8 falls to a position lower than the discharge exit in the lower part of the auxiliary tank 9, and the releasing agent 6 in the auxiliary tank 9 is discharged in accordance with this entering of bubbles. Then, the free surface 8 of the releasing agent 6 in the main tank 5 is raised; and when this free surface 8 is raised to a position higher than the discharge exit in the lower part of the auxiliary tank 9, entering of bubbles of air is stopped, and discharging of the releasing agent 6 is stopped. Thus, the releasing agent free surface 8 in the main tank 5 is always held in an approximately fixed level. |
