Calender
CA 1190778 A · Owner: Kusters, Eduard · Inventors: Hartmann, Werner; Ahrweiler, Karl-Heinz; Anstotz, Helmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a calender for in-line use in a paper machine. The calender comprises two pairs of deflection rolls controllable by zone, forming closely following roll gaps. One roll of each pair is provided with an elastic covering having a hardness of at least 85°Shore D, while the other roll of each pair is a hard roll. This allows in-line calender operation at higher speeds than with known calenders.
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
- Granted July 23, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 2002.
- 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.