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Device for circulating developer

  • US 4,894,688 A
  • Filed: 02/29/1988
  • Issued: 01/16/1990
  • Est. Priority Date: 03/03/1987
  • Status: Expired due to Term
First Claim
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1. A device for use with an image forming apparatus having a photosensitive drum and a developing device and a cleaning device disposed around said photosensitive drum for conducting developer recovered in said cleaning device to said developing device comprising:

  • a circulating passage means provided between said developing device and said cleaning device so as to communicate said developing device with said cleaning device;

    discharging means for discharging developer recovered in said cleaning device to said circulating passage means;

    conveying means disposed in said circulating passage means for conveying developer in said circulating passage means to said developing device, said conveying means and said circulating passage means being constructed to provide a space between said conveying means and said circulating passage means such that a portion of the developer is allowed to be temporarily retained in said space; and

    supplying means for supplying developer conveyed by said conveying means into said developing device.

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