B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
164/2, 327/1.6
B23K 26/08 (2006.01)
Patent
CA 1188748
ABSTRACT OF THE DISCLOSURE A process for perforating material comprising the steps of advancing material along a path of travel, passing the advancing material over a movable laser mask having an aperture such that the material drives the mask in unison with the movement of the material, and directing at least one laser beam through the corresponding aperture so as to vaporize the material juxtaposed the mask aperture to cor- respondingly form an opening in the material. The apparatus contemplated for perforating the material as it is advanced along a path of movement comprises guide rolls and unwinding and rewinding apparatus for advancing the material along the path of movement, a rotatable hollow mask member having at least one aperture and being operatively associated with the unwinding and rewinding apparatus for enabling the perfor- ation of the material as it is advanced along the path, and for being driven by and in unison with the advancing material, and a laser operatively associated with the mask member for vaporizing material juxtaposed said aperture.
401358
Bennett William T.
Parks Bennie L.
American Brands Inc.
Osler Hoskin & Harcourt Llp
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