Control device for operating a coating device
CA 2029663 C · Owner: Martin, Claus · Inventors: Esser, Reinhard; Graab, Helmut; Martin, Claus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for operating a coating device provides for capturing variations of the angle of the coating edge of a doctor element for instance, in relation to the horizontal directly by a signal generator attached to the doctor element in the vicinity of its coating edge. This signal generator may work on electromagnetic basis so that the signal will be transmitted to a receiver without any line. Preferably a tilt switch is provided which determines slight variations of a set angle of the coating edge relative to for example, the horizontal by means of displacement of a mercury pearl and two electrodes which will be short-circuited by the mercury pearl.
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 November 9, 1990 and granted November 26, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 9, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 9, 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.