Hemming press
CA 2117819 C · Owner: Western Atlas, Inc. · Inventors: Hartley, William R.; Jehmlich, Mark A.; Mcnamara, Jeffrey S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A press with both prehemming and final hemming tools or steel each driven by the same prime mover. Each steel is mounted on a separate carrier driven through separate toggle joints to advance and retract the steels for prehemming and final hemming of an upturned flange along an edge of a steel panel. To facilitate synchronizing the operation of at least two presses the , prime, mover may be a screw and servo motor drive assembly.
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 11, 1994 and granted December 24, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 11, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 11, 2016.
- 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.