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Expired Canadian patentCanada

Polygonal scanning mirror and arrangement

CA 1098349 A · Owner: Siemens Aktiengesellschaft · Inventors: Reichl, Helmut; Schmidt, Ludwig

CIPO record

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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 device for use in a nonmechanical printer retains and drives a polygonal mirror. A discoid plate is rigidly connected to the shaft of a drive mechanism. In the discoid plate adjusting screws are disposed. Adjacent to this discoid plate a retaining device for holding the polygonal mirror coaxially of the shaft is provided on the drive shaft. The retaining device for the mirror comprises a centre bore of short guidance length so that the retaining device is adapted to be tilted relative to the drive shaft. The mirror retaining device is resiliently braced against the discoid plate by means of the adjusting screws. The position of the mirror retaining device relative to the drive shaft can …

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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 March 31, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 21, 1978
GrantedMarch 31, 1981
Term endedMarch 31, 1998
Patent numberCA 1098349 A
Classification (IPC)G02B26/12

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedFeb 21, 1978Patent grantedMarch 31, 1981Term endedMarch 31, 1998

Sources & verification

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