Method of detecting flaws in rims of lap seamed ferrous can bodies
CA 1049096 A · Owner: American Can Company · Inventors: Sieverin, Walter J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method of detecting flaws in the rims of lap seamed substantially cylindrical ferrous objects. A magnetic sensor scans the object rim and generates a wave form signal containing portions which respectively represent magnetic field disturbances caused by rim flaws ant the rim lap area the flaw wave form portion having a smaller amplitude and higher frequency than the lap area wave form portion. The wave form signal is processed to obtain a relatively greater voltage amplitude for the flaw wave form portion. Its total peak-to-peak voltage is obtained and compared to the maximum acceptable voltage value for flaws. When the former exceeds the latter, a signal is generated which indicates …
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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 20, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 20, 1996.
- 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
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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.