| 摘要 |
A method and apparatus for longitudinal compressive treatment of a web (16) which employs a novel sheet-form retarding member (40). The working thereof is comprised of a sat of spaced-apart retarding ridges (46) distributed across the width of the portion of the web to be retarded. The ridges are arranged acutely to the longitudinal feeding direction (S) of the web, with initial portions disposed to apply resistance forces (FR) to corresponding portions of web that arrive at the ridges. The resistance force of each ridge resolves into a retarding force component (FS) that resists forward travel of the corresponding portion of web, and a diverting force component (FD) which at least temporarily diverts the path of travel of this portion of web to a direction acute to its original longitudinal direction of movement. The aggregate effect of the set of retarding ridges is to subject the overall web to a substantial retarding action. <IMAGE> |
