Calender
CA 2120786 C · Owner: Sulzer Papertec Krefeld Gmbh · Inventors: Wenzel, Reinhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A calender arrangement having vertically-arranged upper center and lower, rollers with matching upper center and lower carrier-blocks and a suspended spindle comprises a support-element above a bearing-surface on the upper carrier-block. The support-element aids in lifting the suspended spindle and a carrier-nut when raising the upper carrier-block. An insert is placed between a bearing-surface on the upper carrier-block and the support-element, which comprises a horizontal slider seated on the upper carrier-block which enables a relatively small motor to be used to reset the carrier-nut.
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 April 7, 1994 and granted February 25, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 2016.
- 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.