| 摘要 |
An apparatus and method for high speed laser perforation of a web involves a web-bearing cylinder receiving the web in a wrapped spiral pattern. The web- bearing cylinder includes a slit along a circular circumference of the cylinder. A laser guiding tube is provided for propagation of a laser beam within the web-bearing cylinder. An inner cylinder is also provided in the w eb- bearing cylinder. The inner cylinder has an axis, supports a reflecting mirr or adjacent to the laser guiding tube to direct the laser beam in the slit in t he web-bearing cylinder, and is rotatable around the axis to adjust an orientation of the reflecting mirror and thereby direct the laser beam aroun d the circular circumference of the web-bearing cylinder in the slit.
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