| 摘要 |
<p>Smoke apron (11) is rolled around a drum (1) equipped with mounting and drive means (27). Arrangement has first (21) and second rollers rotatably arranged along the axle with a lengthwise space between them smaller than the length of the drum. It has at least one further roller (24) rotatably located obliquely to the first and second rollers. Said rollers are so arranged that the drum can be laid on them in a stable position and kept stable between two axial limit stops. At least one of the rollers is connected with the drive means to transmit the torsional motion.</p> |
