Developer and image forming apparatus

By designing the developer holder, the first member and the second member in the developer, and applying an intermediate potential, the problem in the prior art is solved that it is difficult to simultaneously recover the regular electrode toner and the reverse polarity toner in the developer, and effective recovery of the floating toner and leakage prevention is achieved.

CN119717439APending Publication Date: 2025-03-28FUJIFILM BUSINESS INNOVATION CORP
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Patent Information

Application Number
CN202410191163.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-09-26
Filing Date
2024-02-21
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The prior art is difficult to effectively recover the floating toner in the developer, especially since the magnetic poles of the regular electrode toner and the reverse polarity toner are different from each other, making it difficult to recover both toners simultaneously.

Method used

A developer is designed, which includes a developer retainer, a first member and a second member. The developer holding body holds the developer, the first member is arranged on the downstream side of the developer supply position, and the second member has a surface opposite to the developer holding body between the developer holding body, the image holding body, and the first member, and an intermediate potential is applied to realize effective recovery of the floating toner.

Benefits of technology

With this design, floating toner in the developer, including regular electrode toner and reverse polarity toner, can be effectively recovered, preventing them from leaking to the outside, and improving the recovery efficiency.

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Abstract

A developing device and an image forming apparatus, the developing device including: a developer holding body that holds a developer that contains a toner and a carrier and is supplied to an image holding body that forms an electrostatic latent image; a first member provided downstream of a developing position at which the developer held by the developer holding body is supplied to the image holding body, the developing position being a position at which the developer held by the developer holding body is supplied to the image holding body; and a second member having a surface facing the developer holding body between the developer holding body, the image holding body, and the first member, and to which an intermediate potential is applied, the intermediate potential being a potential between a potential applied to the developer holding body and a potential applied to the first member.
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