Printing plates
CA 1061160 A · Owner: Vickers Limited · Inventors: Wielinga, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
IMPROVEMENTS IN O? RELATING TO PRINTING PLATES ABSTRACT OF THE DISCLOSURE, A method of treating a plate comprising a substrate carrying an image includes the step of providing a shield on the plate prior to heating the plate so as to prevent contaminants contacting the plate during the heating step. The plate may be a radiation sensitive plate which has been image-wise exposed and developed and which comprises a substrate coated with a radiation sensitive layer comprising for example a quinone diazide and a novolak resin. The radiation sensitive plate may be for the production of a lithographic printing plate and the shield may be in the form of for, example, a layer of a salt such as …
Read the whole patent
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 August 28, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 28, 1996.
- 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.