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Detachably mounted toner unit having a toner supply unit and a toner recovery housing unit

  • US 5,381,217 A
  • Filed: 05/22/1992
  • Issued: 01/10/1995
  • Est. Priority Date: 06/21/1991
  • Status: Expired due to Fees
First Claim
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1. A toner unit adapted to be detachably mounted on an image forming apparatus including a developing device for developing a latent image formed on an image bearing member with a toner and a cleaning device for removing the toner remaining on the image bearing member, the toner unit characterized by:

  • a toner supply unit for storing toner to be supplied to the developing device and a toner recovery housing unit, integrated with the toner supply unit, for accommodating recovered toner removed from the image bearing member by the cleaning device, the toner recovery housing unit having an air flow portion for permitting air to flow from inside of the toner recovery housing unit to outside to decrease internal pressure of the toner recovery housing unit as recovered toner collects when the toner unit is mounted on the image forming apparatus.

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