| 摘要 |
Several guide channels (6, 7) for respectively one paper web are arranged in a fan shape, these channels being oriented toward the nip (5) of a pair of feed rolls (1) of a printing device (2, 3) and each being equipped with a gripper (8, 9). In the rest position, each gripper (8, 9) is in contact with a web of paper, and the free ends of the paper webs have a spacing from the nip (5). The gripper (9) for the paper web to be printed advances the latter until it has entered the nip (5) of the rotating pair of rolls (1), then releases the web, and initially remains in its position (8). The pair of rolls (1) further conveys the paper web first into its printing position, after the printing step into its cutting position, and after cutting again in the reverse direction. Before the paper web leaves the nip (5), the gripper (8) engages once more and returns into its rest position (9), entraining the paper web, so that the end of the latter, produced by the cutting step, assumes the position occupied by its previous free end prior to the advancement of the grippers. In this way, it is possible to print in any desired sequence onto various paper webs and also directly in succession onto one and the same paper web. |
