Rotary shear machine
CA 1072004 A · Owner: Martin, Merrill D. · Inventors: Martin, Merrill D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A direct drive rotary shear machine is described having helical blades secured to oppositely rotating parallel cylinders for transversely shearing a continuously moving web perpendicular to its direction of travel. The machine may be controlled for intermittently shearing the web and/or for continuously shearing the web into sheets of predetermined lengths.
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
- Granted February 19, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 1997.
- 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.