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Expired Canadian patentCanada

Method and apparatus for detecting a sheet strip material misfeed condition

CA 1308461 C · Owner: Oberg Industries, Inc. · Inventors: Baldwin, William; Malloy, Joseph P.

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A plurality of individual frames or stampings provided in a sheet strip material by a stamping device are passed in proximity to a sensing device. As each individual frame or stamping is passed in proximity to the sensing device, the sensing device provides a voltage signal to a controller. The voltage signal is proportional to the amount of or, mass of, metallic material in each frame or stamping and the distance between the frame or stamping and the sensing device. The controller generates an individual waveform from the voltage signal for each frame passed in proximity to the sensing device. Each individual waveform is a function of the position of the movable portion of the stamping …

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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 October 6, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 6, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 10, 1988
GrantedOctober 6, 1992
Term endedOctober 6, 2009
Patent numberCA 1308461 C
Classification (IPC)B21D28/00 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedAug 10, 1988Patent grantedOct 6, 1992Term endedOct 6, 2009

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.