Roll forming machine for an indeterminate length metal roof panel
CA 2228496 C · Owner: Schultz, Robert E. · Inventors: Schultz, Robert E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A machine (90) for forming a metal roof panel (50) of indeterminate length from a uniform width supply strip (96) of sheet metal having a pair of parallel straight longitudinal edges (98 100). The machine (90) has a series , of spaced forming stations (102) each having upper and lower shaping rollers between which the sheet metal strip (96) is passed so as to impart a desired shape to the sheet metal strip (96) which is uniform along the length of sheet metal strip (96) after it exits the apparatus. A stamping station (104) located in the path of the sheet metal strip (96) before the series of spaced forming stations (102) is effective to form linear impressions (74) in the sheet …
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 July 17, 1996 and granted May 21, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 17, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 17, 2018.
- 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.