SELF-HEATING FILTER.

摘要

A filter composed in such a manner that conductive filter media (21) to (28) are spirally wound with separating plates (31) to (38) interposed therebetween and the filter media (21) to (28) are bonded to each other in a double leaved form at neighboring ends thereof so that they may be opened in the direction of flow of gas and fine particles in the gas may be trapped when the gas passes through the media (21) to (28). The filter media (21) to (28) are connected to a central electrode (41) provided in the center of the windings thereof and to an outer cylindrical electrode (42) provided on the outer peripheral part of the windings, with heating electric current supplied thereto.