Web-motion controller
CA 2030357 C · Owner: Erhardt + Leimer Gmbh · Inventors: Niemann, Heinrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a web-motion controller which comprises a guide frame having two guide rollers. The lateral deviation of the web downstream of the second guide roller is monitored by a position sensor whose output signal is converted into control commands for a servomotor adjusting the guide frame. In the guide frame, between the guide rollers, a braking roller is provided which is wrapped and entrained by the web and has a braking device. A force-measuring drum sensing, the web tension in the part of the web following the braking roller in the travel direction of the web serves for producing measured-value signals, which control the braking device via a control unit having a …
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 March 27, 1990 and granted September 6, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 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.