| 摘要 |
A permeable drum for wet or dry treatment of textile material, paper or such permeable materials of a certain width comprises narrow sheet metal strips or narrow webs. The sheet metal strips extend in an axially parallel direction. Connector members between the sheet metal strips are aligned in the peripheral direction. The connector members, also serving as spacers, are of a one-piece design and connect to adjacent sheet metal strips. Secure connection of the spacers to the sheet metal strips is effected by screws. Radially inward beneath the inner edges of the strips is a sheet metal jacket, provided with apertures, having its axis arranged in parallel to a longitudinal axis of the permeable drum. This additional sheet metal jacket causes a certain dynamic pressure of the air flowing through the permeable drum, so that the treatment result is rendered more uniform. Furthermore, the precision of rotation of the permeable drum construction is increased.
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