Elimination of play between rolls 13 and main bearings 12 in a non-forming area and forming of material to be formed in a forming area are repeated while play between a housing 10 for the rolls 13 and main bearing axle boxes 11 is always eliminated.

A material 1A to be formed, which is uncoiled by an uncoiler 40 from a coil 1B while controlled against meandering, is adjusted in inclination angle by an approach angle adjuster 50 and guided into a separator-forming mill 60. The material to be formed is ...

This invention provides a thin meshy porous body which is made of a metal, a resin, or paper, and which may be suitably used as a core member for a battery electrode or various filter members. Front and rear faces of a thin plate member are embossed so tha...