Method and apparatus for repetitively marking a moving sheet
CA 1290816 C · Owner: Megaw, John H.P.C. · Inventors: Megaw, John H.P.C.; Ward, Brooke A.; Bransden, Antony S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The energy of a laser beam is used to form images at intervals along a lengthwise moving web The images are formed along a plurality of axes spaced transversely of the web so that after slitting and cutting an image appears on each sheet. The laser beam is directed across the web and is repetitively and successively switched by notating optical mirrors in assemblies located at intervals across the web to scan image-bearing masks rotating with the mirrors. The beam impinges on respective mirrors of successive assemblies. The mirror assemblies are conical mirror segments or plane mirrors cooperating with a fixed conical mirror segment to produce a focussed line that is fixed in space and …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted October 15, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 15, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.