IMAGE FORMING APPARATUS
First Claim
Patent Images
1. An image forming apparatus, comprising:
- a photosensitive body;
a magnetic roller disposed to be spaced apart from the photosensitive body at their closest points by a distance;
a donor roller disposed adjacent the photosensitive body and the magnetic roller, the donor roller having a diameter larger than the distance between the magnetic roller and the photosensitive body.
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Abstract
An image forming apparatus is disclosed. The image forming apparatus includes a photosensitive body, a magnetic roller disposed at a predetermined distance from the photosensitive body, and a donor roller disposed between the photosensitive body and the magnetic roller. The donor roller has a diameter larger than the closest distance between the photosensitive body and the magnetic roller. The image forming apparatus includes gap rings and pressing device to maintain desired gaps between the magnetic roller and the donor roller and between the donor roller and the photosensitive body.
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Citations
24 Claims
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1. An image forming apparatus, comprising:
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a photosensitive body; a magnetic roller disposed to be spaced apart from the photosensitive body at their closest points by a distance; a donor roller disposed adjacent the photosensitive body and the magnetic roller, the donor roller having a diameter larger than the distance between the magnetic roller and the photosensitive body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A developing device usable in an image forming apparatus, comprising:
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a first rotating body configured rotate about a first rotational shaft; a second rotating body configured rotate about a second rotational shaft; a first gap ring disposed on the first rotational shaft, the first gap ring being configured to interfere with a movement of the second rotating body toward the first rotating body; and a pressing device configured to push the first rotating body toward the second rotating body so as to maintain a first gap between the first rotating body and the second rotating body. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A developing device usable in an image forming apparatus, comprising:
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a photosensitive body configured rotate about a first rotational shaft; a magnetic roller configured to rotate about a second rotational shaft, the magnetic roller being spaced apart from the photosensitive body at their closest points by a distance; a donor roller configured rotate about a third rotational shaft, the donor roller being disposed adjacent the photosensitive body and the magnetic roller, the donor roller having a diameter larger than the distance between the magnetic roller and the photosensitive body a first gap ring disposed on the third rotational shaft, the first gap ring being configured to interfere with a movement of the photosensitive body toward the donor roller; a second gap ring disposed on the third rotational shaft, the second gap ring being configured to interfere with a movement of the magnetic roller toward the donor roller and a pressing device configured to elastically bias the donor roller toward the photosensitive body and the magnetic roller so as to maintain a first gap between the photosensitive body and the donor roller and a second gap between the magnetic roller and the donor roller. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification