Press roll
CA 2089412 A1 · Owner: Schiel, Christian · Inventors: Schiel, Christian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A press roll for dewatering a web of paper in a paper-making machine is arranged with the median axes of the press roll and of the mating roll lieing in a pressing plane whose position departs from the vertical. At least one of the two rolls is designed in the form of a "shoe roll", having a rotatable metallic roll casing a, stationary yoke extending through the roll casing adjacent to the roll gap, and a shoe to transmit the pressing force from the yoke to the roll casing. Between the yoke and the shoe there is a pressure chamber receiving hydraulic liquid for pressing the shoe against the roll casing. The yoke is designed in the form of a hollow body. The dimensions and the materials of …
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 February 12, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 12, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 2015.
- 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.