Drive unit for the reel-up of a paper machine or paper finishing machine as well as hydraulic operating system for the drive unit
CA 2010131 C · Owner: Valmet Oy · Inventors: Panttila, Vaino; Villgren, Voitto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a drive unit (10) for the center-wind reel-up of a paper machine or paper finishing machine comprising, means by which the rotation drive of the motor (11) is transferred to the shaft (19). In its interior, the shaft (19) comprises a transfer shaft (21) rotatable along with the shaft (19) said transfer shaft, (21) being fitted to be displaceable on a coupling and uncoupling process in the direction of the longitudinal axis (X1) of the shaft (19) by means of a cylinder device (22). When the transfer shaft (21) is displaced (arrow L1) towards the coupling half (23b) of the central drum of the paper web roll (P) the coupling half (23a) of the, drive unit attached to the …
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 15, 1990 and granted August 30, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 15, 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.