Image forming apparatus and process cartridge

JP7819531B2Active Publication Date: 2026-02-25RICOH CO LTD
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Patent Information

Application Number
JP2022030656
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-03-01
Publication Date
2026-02-25
Estimated Expiration
2042-03-01

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Abstract

To reduce the generation of agent accumulation in a developing device.SOLUTION: A developing device 26 is provided with a developing roller 26a (developer carrier) that rotates in a predetermined rotation direction and faces a photoreceptor drum 21 with a developing gap PG (predetermined gap), and a doctor blade 26c (developer regulation member) that faces the developing roller 26a on the upstream side in the rotation direction of a developing position A where the developing roller 26a faces the photoreceptor drum 21 and regulates the amount of developer carried on the developing roller 26a. When the developing gap is defined as PG (mm), and the amount of developer per unit area on the developing roller 26a regulated by the doctor blade 26c and reaching the developing position A as ρ (mg / cm2), the loose apparent density of toner X (g / cm3) satisfies the relationship of X≤0.00005935×(ρ / PG)2-0.02687×(ρ / PG)+3.363.SELECTED DRAWING: Figure 4
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Citation Information

Patent Citations

  • Image forming method

    JP1987293253A

  • Two-component developer and image forming method using the same

    JP1999344838A

  • Method for developing electrostatic latent image

    JP2002268381A

  • Toner image forming device

    JP2004109290A

  • Image forming apparatus

    JP2004109325A