| 摘要 |
The offset sheet printing machine having an arrangement for punching and/or perforating paper sheets (8), comprises a printing group having a first printing cylinder (2) and an allocated rubber blanket cylinder (3) and a varnishing group (19) having a second printing cylinder (18) and an allocated forming cylinder (17), one of the rubber blanket cylinder (3) and the forming cylinder (17) being equipped with fixing device (16) for fastening a foil layer to it, and a perforating ribbon (5) being fixed on the first printing cylinder (2) or the second printing cylinder (18). A counter-pressure device is provided on one of the rubber blanket cylinder (3) and the forming cylinder (17), the counter-pressure device being allocated to the printing cylinder (2, 18) with the perforating ribbon (5) fixed on it for effecting perforations and/or punchings in paper sheets (8). The counter-pressure device comprises a layer fixed on the one of the rubber blanket cylinder (3) and the forming cylinder (17), the layer being a combination of an inner underlying blanket (15) of hard material and an outer resistant foil (4).
|
