To provide homogeneous gas or liquid flow through clearance between cage-shaped covering and peripheral wall of a thin-shell drum by fixing metal strips to the drum wall that functions as a permeable conveyance element to make a uniform treatment of textile, paper, etc.

This equipment for treating textile article, fleece or paper by passing and circulating a gas or liquid through a thin-shell drum as a permeable conveyance element comprises a thin-shell drum wherein along the whole length of drum shell, a plurality of perforations 19 are bored and metal strips are tightly fixed in radial direction to the drum wall with a screw or rivet fitted to a flange at an edge of each metal strip 10 by embedding the head 17 of the screw or rivet in each of the perforations 19 so as to form a clearance between a cage-shaped covering 9 that covers the drum shell 5 and the drum shell 5, thus securing uniform gas or liquid flow.