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US 12,724,363 B2Granted
Magnet roller, developing roller, and image forming apparatus
AssigneeKYOCERA Document Solutions Inc.
InventorsYukimasa Watanabe, Kazuaki Ezure, Haruhiro Sato
Life of this patent
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Abstract
A magnet roller includes a shaft, a plurality of magnets, and an adhesive. The plurality of magnets is arranged in a circumferential direction of a shaft center of the shaft on an outer surface of the shaft. The adhesive bonds the shaft and the plurality of magnets to each other. At least one of the magnets has a recess portion recessed with respect to a surface of the shaft, the surface facing the outer surface.
Claims6
A magnet roller, comprising:
- a shaft;
- a plurality of magnets that is arranged in a circumferential direction of a shaft center of the shaft on an outer surface of the shaft;
- and
- an adhesive that bonds the shaft and the plurality of magnets to each other, wherein
- at least one of the plurality of magnets has a plurality of recess portions that is recessed with respect to an inner surface of the magnet facing the outer surface of the shaft;
- the plurality of recess portions are spaced apart from each other in the circumferential direction, and
- a ratio of a sum of widths of the plurality of recess portions in the circumferential direction to a width of the inner surface of the magnet in the circumferential direction is 12% or more and 25% or less.
4 more elements
A magnet roller, comprising:
- a shaft;
- a plurality of magnets that is arranged in a circumferential direction of a shaft center of the shaft on an outer surface of the shaft;
- and
- an adhesive that bonds the shaft and the plurality of magnets to each other,
- wherein
- at least one of the plurality of magnets has a plurality of recess portions that is recessed with respect to an inner surface of the magnet facing the outer surface of the shaft,
- the plurality of recess portions are spaced apart from each other in the circumferential direction, and
- a ratio of a depth of each of the plurality of recess portions with respect to a entire height of the magnet in a radial direction of the shaft center is 7% or more and 14% or less.
5 more elements
Dependencies are inferred from the claim text.