| 摘要 |
<p>In a method for forming pleats in a filtering member of the present invention, when pleats are formed in a filtering member (10) by bringing a pair of blades (5) into abutment with the filtering member (10) from both sides in the width direction, ionised air is blown onto the edge surface of the filtering member (10) and towards the pair of blades (5), by a static electricity removal device (30), from a side of the filtering member (10). Preferably the filtering member (10) includes a polytetrafluoroethylene porous film and a permeable supporting member.</p> |
