| 摘要 |
A method of manufacture of an article such as a corneal implant glide, formed of two resin film elements, each of which must be precision cut to a predetermined size and configuration with smooth, burr-free edges and with a narrow welded band of precisely controlled characteristics joining the two film elements along mating edges, comprises the steps of aligning two resin films in overlapping relation and constraining the films to maintain them in surface-to-surface contact with an exposed area at least as large as that required for the finished article. A laser beam of extremely small dot-like cross-section, preferably about 0.005 inch (0.127 millimeter) diameter, is directed to impinge upon the exposed area of the films and the beam is then moved, relative to the exposed film area, along a precisely controlled path corresponding to the outline of the article, including the aforementioned mating edges, to cut the two films to the precise required shape and simultaneously weld the two films together.
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