A method and apparatus to continuously harden articles made of visible light-curable resins, including continuously moving the articles to be hardened relative to a multiplicity of sources of visible light which are independently controllable to be able to vary the radiation to which the articles is...http://www.google.ca/patents/US5135685?utm_source=gb-gplus-sharePatent US5135685 - Method and apparatus for continuous hardening of visible light-curing resins
