| 摘要 |
A roller 1 with various uses in machines for the production of corrugated fibreboard is formed with its outer surface having a degree of elasticity. In the illustrated case this is achieved with tubes 12 wound helically on roll body 11 from the middle outwards and inflatable through passages 13, if desired with a rotary joint. Instead of passages 13, a syringe may be employed. Other embodiments have only a single helical tube, a plurality of circumferential tubes, tubes extending longitudinally of the roll, either parallel to or at a small angle to the axis of the roll. Solid resilient cords can be used instead of the tubes. Other embodiments use one or more sheaths around the body 11, and these may define one or more inflatable spaces, may incorporate air cells or bubbles, or may be of cellular material. Reinforcements may be incorporated in such sheaths. <IMAGE> |
