| 摘要 |
<p>An apparatus for periodically forming slant, linear easy-to-tear portions (100) on a long plastic film (1), comprising a hard roll (11) on which the long plastic film (1) passes, pluralities of pattern rolls (13) each having a slant, linear stamp means (13a) on a rolling surface, a motor-driven shaft (15) to which the pattern rolls (13) are fixed, and a mechanism for pushing the pattern rolls (13) toward the hard roll (11), the movement of the pressure rolls (21) toward the hard roll (11) causing the pattern projections (100) of the stamp means (13a) to be pressed onto the plastic film (1) on the hard roll (11), thereby periodically forming the slant, linear easy-to-tear portions (100) on the plastic film (1).</p> |
