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| United States Patent |
6,423,932
|
|
Lawson
|
July 23, 2002
|
Apparatus and method for high speed laser perforation of webs
Abstract
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
web-bearing cylinder. The inner cylinder has an axis, supports a
reflecting mirror adjacent to the laser guiding tube to direct the laser
beam in the slit in the web-bearing cylinder, and is rotatable around the
axis to adjust an orientation of the reflecting mirror so as to direct the
laser beam around the circular circumference of the web-bearing cylinder
in the slit.
| Inventors:
|
Lawson; William E. (1917 County Rd. I, Somerset, WI 54025)
|
| Appl. No.:
|
785867 |
| Filed:
|
February 16, 2001 |
| Current U.S. Class: |
219/121.7; 219/121.71 |
| Intern'l Class: |
B23K 026/38 |
| Field of Search: |
219/121.6,121.74,121.7,121.71
131/281
|
References Cited
U.S. Patent Documents
| 3594261 | Jul., 1971 | Broerman | 219/121.
|
| 3808394 | Apr., 1974 | Mominee et al. | 219/121.
|
| 4302654 | Nov., 1981 | Bennett et al. | 219/121.
|
| 4507535 | Mar., 1985 | Bennett et al. | 219/121.
|
| 4843207 | Jun., 1989 | Urbanek | 219/121.
|
| 4961080 | Oct., 1990 | Henderson et al.
| |
| 6038487 | Mar., 2000 | Balster et al.
| |
Primary Examiner: Evans; Geoffrey S.
Attorney, Agent or Firm: Kinney & Lange, P.A.
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