| 摘要 |
A permeable sheet-metal drum for the wet or dry treatment of textile material, paper or other permeable material of a certain width comprises a normal perforated sheet-metal drum body, on which, along the length of the drum body, projecting sheet-metal strips are attached at a distance from one another. The attachment is achieved by means of bolts or rivets which are inserted into a transverse flange of each metal strip which is perforated like the perforations of the drum and extends perpendicular to each of the sheet-metal strips. The sheet-metal strips increase the drum's resistance to denting and improve the uniform ventilation of the textile or like material lying externally on the edges of the sheet-metal strips on a screen mesh covering.
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