Contact-type charging device having a plurality of projections over the surface of the charging device
The present invention relates to a charging device having a charging member for charging a member to be charged such as a photosensitive member or a dielectric member, and an image forming apparatus having the same. A charging apparatus includes a charging member for being supplied with a voltage to...
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| Main Authors | , , |
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| Format | Patent |
| Language | English |
| Published |
29.10.2002
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| Online Access | Get full text |
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| Summary: | The present invention relates to a charging device having a charging member for charging a member to be charged such as a photosensitive member or a dielectric member, and an image forming apparatus having the same.
A charging apparatus includes a charging member for being supplied with a voltage to charge a member to be charged, the charging member including an elastic member for forming a nip with the member to be charged, and said elastic member having a surface provided with a plurality of projections; wherein a speed A of a surface of said charging member (mm/sec) and a speed B of a surface of the member to be charged (mm/sec) satisfy: when B−A>0, said projections are inclined toward upstream with respect to a movement direction of the surface of the member to be charged in said nip, and when B−A<0, the projections are inclined toward downstream with respect to a movement direction of the surface of the member to be charged in said nip. |
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