Retractable cleaning system for lithographic printing plates
CA 2283282 C · Owner: Presstek, Inc. · Inventors: Lovenstein, James V.; Moss, James R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cleaning apparatus (100) designed for use in conjunction with a lithographic printing member associated with a rotary cylinder (P) comprises an elastomeric (preferably foam) roller (110) for making rotating contact with the printing member; a fixed screen (112); and a brush (112) in rotating contact with the roller (110) and with the screen (114). The roller (110) may extend axially at least across the imaging region of the printing member (i.e. that portion of the imaging member that actually receives the image to be printed). The elastomeric roller (110) removes imaging debris from the cylinder (P) while , the brush (112) removes from the roller (110) debris that would otherwise …
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
- Filed January 19, 1999 and granted July 8, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 19, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 19, 2021.
- 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.