| 摘要 |
PURPOSE:To release clogging of a screen easily, surely and in a short period of time by forming a screen with shape memory materials and providing a temperature varying means to make the screen temperature variable. CONSTITUTION:The whole of a screen 3 is formed with shape memory alloys, and a temperature varying means 14 to heat the screen 3 and vary the temperature of the screen 3 in order to restore the shape of the screen 3 transformed by an external force applying means 13 to the original shape. As a result, when clogging is generated in the screen 3, particles inserted firmly inside through- holes 3a can be removed easily and surely out of the through-holes 3a by stretching the screen 3 and expanding and opening the through-holes 3a of the screen 3. Also, as a net step, the screen 3 can be restored to the original shape by the temperature varying means 14.
|
