Grooved shoe press belt with conical rebates
CA 2521975 C · Owner: Davis, Trent · Inventors: Davis, Trent
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Conventional shoe press belts may suffer from some degree of groove closure as the belt matrix material deflects under the nip load, causing it to prevent the venting / dewatering, which is crucial to the belt's performance. The present invention provides an improved shoe press belt (1) having formed on an outer surface a plurality of parallel machine direction grooves (3). Each groove (3) has formed therein a plurality of conical rebates (2). The rebates(2) are spaced along each groove (3) with centers coincident with the groove (3) center line. The positions of the rebates (2) are stepped diagonally across adjacent parallel grooves (3).
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, 2004 and granted July 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 2026.
- 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.