| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a laterally perforating apparatus of a web, preferably, a paper web to form a bag. SOLUTION: A laterally perforating apparatus of a web has a perforating blade 10 and a grooved roller 17 both of which are attached to a machine frame and a web to be perforated is passed through the gap between the perforating blade 10 and the grooved roller 17. At least one of adjusting devices 13, 21 for changing the distance between the rotary axial line of the perforating blade and that of the groove roller is provided in order to adjust the thrusting depth of the teeth of the perforating blade into the ring grooves of the grooved roller.</p> |
