| 摘要 |
The machine comprises a frame, a pair of nip rollers, two side-rollers disposed on respectively opposite sides of the nip rollers, and four pressure fluid operable devices each displaceably supporting a respective end portion of one of the side-rollers. Each pressure fluid operable device comprises a cylinder and a piston provided with a rod extending through one end portion of the respective cylinder to bear against the frame, the respective other end portion of each cylinder defining a housing provided with bearing means for the respective side-roller end portions and each cylinder being displaceably mounted in guide means. |
