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Misfeed detector for multi tray sheet feeders

  • US 5,673,907 A
  • Filed: 02/13/1995
  • Issued: 10/07/1997
  • Est. Priority Date: 02/13/1995
  • Status: Expired due to Fees
First Claim
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1. In a sheet transport system comprising:

  • a. a first support tray for supporting a stack of sheets,b. a second support tray for supporting a stack of sheets,c. outlet guide means operably connected to said first and second support trays and located to receive sheets from each of said first and second support trays,d. an outlet sensor at said outlet guide means for sensing the thickness of each sheet passing through said outlet guide means,e. means for storing in memory the thickness value sensed by said outlet sensor of a first sheet discharged from each of said trays and passing through said outlet guide means, ande. means for comparing the thickness value sensed by said oulet sensor of subsequent sheets fed from each tray and passing through said outlet guide means with the thickness value stored in memory of the first sheet fed from the same tray and generating a signal indicating a misfeed if the values differ by a predetermined amount.

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