| 摘要 |
<p>A web (11) perforating apparatus (10) comprising: a first and second perforator wheels (21, 22) mounted on stationary axes (26, 27) and spaced from each other along a predetermined path and in alignment with each other; first and second anvil cylinders (44, 45) spaced from each other along the path for cooperation with the wheels (21, 22) each cylinder having a raised (37) and a depressed portion (34), and a movable axis (35, 36). The cylinders are rotated about the axes (35, 36) synchronously with the web movement, and the cylinders (44, 45) may be selectively moved toward and away from the perforator wheels (21, 22).</p> |
