De-warping apparatus for straightening a plate
CA 2211562 C · Owner: R-Theta Thermal Solutions Inc. · Inventors: Lipinski, Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is a de-warping apparatus for straightening a plate which is bent such that a centre portion thereof is higher than outer portions thereof. The apparatus comprises a plurality of rollers forming a support surface wherein the centre most rollers are mounted lower than the outermost rollers; an axle mounted above the rollers; a plurality of disks mounted for rotation about the axle wherein the centre most disks have a larger radius than the outermost disks; and means for advancing the plate between the rollers and disks whereby a greater downward force is applied to the centre portion of the plate than to the outer portions for de-warping the plate.
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 October 6, 1993 and granted February 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 6, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 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.