Image forming apparatus when a maximum developing bias voltage |V| max and surface potential Vd of a charged image bearing member satisfy: |V| max≦|Vd|
First Claim
1. An image forming apparatus comprising:
- an image bearing member;
charging means for electrically charging said image bearing member;
a rotatable developer carrying member for carrying a developer to develop an electrostatic image formed on said image bearing member with the developer, said developer carrying member being supplied with a developing bias voltage comprising an AC voltage;
non-rotatable magnetic field generating means, disposed inside said developer carrying member, for magnetically attracting the developer on said developer carrying member,wherein said developer carrying member has a surface elastic layer, and said developer carrying member is press-contacted to said image bearing member, and the developer is a one component magnetic toner, anda maximum value of an absolute value of the developing bias voltage |V|max and a surface potential of the image bearing member charged by said charging means is Vd), satisfy,
|V|max≦
|Vd|.
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Accused Products
Abstract
An image forming apparatus includes an image bearing member; a charging device for electrically charging the image bearing member; a rotatable developer carrying member for carrying a developer to develop an electrostatic image formed on the image bearing member with the developer, the developer carrying member being supplied with a developing bias voltage including an AC voltage; non-rotatable magnetic field generating device, disposed inside the developer carrying member, for magnetically attracting the developer on the developer carrying member, wherein the developer carrying member has a surface elastic layer, and the developer carrying member is press-contacted to the image bearing member, and the developer is one component magnetic toner, and a maximum value of an absolute value of the developing bias voltage |V|max and a surface potential of the image bearing member charge by the charging device is Vd(V), satisfy,
|V|max=|Vd|.
42 Citations
11 Claims
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1. An image forming apparatus comprising:
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an image bearing member; charging means for electrically charging said image bearing member; a rotatable developer carrying member for carrying a developer to develop an electrostatic image formed on said image bearing member with the developer, said developer carrying member being supplied with a developing bias voltage comprising an AC voltage; non-rotatable magnetic field generating means, disposed inside said developer carrying member, for magnetically attracting the developer on said developer carrying member, wherein said developer carrying member has a surface elastic layer, and said developer carrying member is press-contacted to said image bearing member, and the developer is a one component magnetic toner, and a maximum value of an absolute value of the developing bias voltage |V|max and a surface potential of the image bearing member charged by said charging means is Vd), satisfy,
|V|max≦
|Vd|. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification