Automatic liquid dampening and cleaning system for an offset printing press
CA 2195805 C · Owner: Wood, Donald R. · Inventors: Wood, Donald R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for supplying a dampening liquid to a water fountain tray in a printing press to maintain the desired amount of the liquid in the tray comprises a sealed dampening liquid container mounted on outside wall of tray. The container has vertical side walls a top and bottom wall, an inlet and outlet port in the bottom, and a spring loaded, pressure sensitive valve installed in the inlet port. The inlet port is connected to a pressurized liquid supply line and the outlet port is connected to a line which supplies liquid to the tray. The spring loaded valve can be adjusted to any liquid level within the tray.
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 22, 1997 and granted May 25, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 2019.
- 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.