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Color image registration system using vacuum transfer drum

  • US 5,307,131 A
  • Filed: 12/14/1992
  • Issued: 04/26/1994
  • Est. Priority Date: 12/14/1992
  • Status: Expired due to Fees
First Claim
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1. Apparatus for transferring successive toner images from a rotatable photoconductive member to a sheet at a transfer zone where toner images are transferred to the sheet, comprising:

  • a generally cylindrical member having a circumferential surface adjacent the photoconductive member at the transfer zone;

    means for moving the sheet around the circumferential surface of the generally cylindrical member in a recirculating path;

    means for transferring the sheet from the cylindrical member to the photoconductive member at the transfer zone, including a conductive fiber brush within an opening in the cylindrical member and means for moving the conductive fiber brush into and out of engagement with the back of the sheet;

    means for detecting when a lead edge of the sheet carried by the sheet moving means if a first predetermined distance from the transfer zone; and

    means, responsive to the detecting means, for forming a latent image on the photoconductive member at an imaging point which is a second predetermined distance from the transfer zone when the detecting means detects the lead edge of the sheet, the second predetermined distance not exceeding the first predetermined distance.

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