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Image forming apparatus and detecting device for detecting a type of recording sheet

  • US 6,668,144 B2
  • Filed: 12/07/2001
  • Issued: 12/23/2003
  • Est. Priority Date: 12/12/2000
  • Status: Active Grant
First Claim
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1. A detecting device comprising:

  • a reading unit adapted to read a picture of a shadow of an edge of a fed sheet; and

    a detecting unit adapted to detect a thickness of the sheet on the basis of the picture read by said reading unit.

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