Method and device with active oscillation damping for winding a web of paper into a roll
CA 2210935 A1 · Owner: Voith Sulzer Papiermaschinen Gmbh · Inventors: Madrzak, Zygmunt; Riedel, Uwe; Deisswanger, Rudolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An oscillation suppression resonator suppresses oscillations of a large oscillating mass in paper machine winding devices. A support device is connected with the large oscillating mass and a predetermined oscillation suppression means is movably arranged as the support device. Cylinders, which can be filled with gas or fluid, are firmly attached to the support device. The pistons of the cylinders are connected via piston rods with the mass movable on the support device. In this manner, upon deflection of the mass from an equilibrium position, a substantially harmonic oscillation takes place with a frequency which is determined by the pressure prevailing on the cylinder. The oscillation …
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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 July 18, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 18, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 18, 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.