Method and device for coating webs of material, especially webs of paper or cardboard
CA 2007544 C · Owner: Muller, Georg, · Inventors: Muller, Georg,; Knop, Reinhard; Sommer, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and device for coating a web (2) of material especially a web of paper or cardboard traveling over a, backing roll (1) whereby coating is applied to the web in excess and reduced by a flow-control component (3) especially, a doctor, to the desired thickness and whereby the flow-control component is secured to a beam (5) that extends over the operating width, characterized in that the coating-thickness deviation from a straight line is determined over the operating width and employed as a parameter for controlling the heat emitted by a heater (13), especially heating strips, positioned on the side of the doctor beam facing away from the backing roller.
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 11, 1990 and granted May 2, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 11, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 11, 2012.
- 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.