| 摘要 |
PCT No. PCT/SE94/01114 Sec. 371 Date Aug. 1, 1996 Sec. 102(e) Date Aug. 1, 1996 PCT Filed Nov. 23, 1994 PCT Pub. No. WO95/14630 PCT Pub. Date Jun. 1, 1995Expandable shaft for winding elongated material, especially soft paper and other nonwoven material. The shaft (10) has a number of radial openings (13) or grooves (22, 24) which house longitudinal blades (23), bars (11) or the like in such a way that these are movable by means of activating means (14, 15, 25) in a radial direction between a retracted and a projected position, whereby a variable effective diameter of the shaft is created. The radial openings (13) or grooves (22, 24) are arranged with a spiral formed inclination in the longitudinal direction of the shaft (10) and the retractable and projectable blades (23) or the bars (11) housed therein are arranged with a corresponding spiral form along the shaft. |
