A laser apparatus for use in laser cutting of a plurality of sheets of smoke-sensitive, heat-sensitive material in aligned stacked relation, the apparatus including a base member assembly for producing a magnetic field and for supporting the stack with a template formed of a generally rigid, magnetic...http://www.google.com/patents/US4458133?utm_source=gb-gplus-sharePatent US4458133 - Method and apparatus for laser engraving of smoke-sensitive materials
