| 摘要 |
<p>A perforating apparatus comprises a pair of guide drums (2a, 2b) for guiding a web so that the web is wound so as to cover part of the mark members (6) of the guide drums (2a, 2b), respectively, each guide drum having a ring-shaped mask member (6), and a plurality of slits (7) formed in the mask member (6), the mask members (6) of the guide drums 2a, 2b) being situated in different axial positions with respect to the axial direction of the guide drums (2a, 2b). The apparatus further comprises a laser beam generator (34), a two-segment mirror (37) adapted to reflect the laser beam (L), emitted form the laser beam generator (34), in two split laser beams (Lh), two direction changing mirror (47a, 47b) for guiding the split laser beam (Lh) into the guide drums (2a, 2b) so as to be coaxial therewith, multisegment reflection mirrors (53) and adapted to reflect the split laser beam toward the web (8) on the guide drums (2a, 2b), and condensing lenses (59) arranged between the mask members (6) and the multisegment reflection mirrors (53) and adapted to converge the subdivided laser beams (Ls), reflected by the multisegment reflection mirrors, on the web on the guide drums (2a, 2b) through the slits, the positions of the condensing lenses being deviated from one anther in the axial direction of the guide drums (2a, 2b).</p> |
