Image forming apparatus having belt unit
First Claim
1. An image forming apparatus comprising:
- an apparatus main body;
a plurality of image bearing members supported by the apparatus main body and arranged in a predetermined direction;
a belt unit configured to be detachably mounted on the apparatus main body, the belt unit including;
a belt frame;
a plurality of belt support rollers supported by the belt frame;
a belt movably supported by the plurality of belt support rollers and extending in the predetermined direction; and
a plurality of transfer members each disposed in confrontation with a corresponding one of the plurality of image bearing members with the belt interposed therebetween; and
a positioning member that fixes, relative to the apparatus main body, each of the plurality of transfer members at a position in the predetermined direction when the belt unit is mounted on the apparatus main body.
1 Assignment
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Accused Products
Abstract
A plurality of image bearing members is supported by an apparatus main body and is arranged in a predetermined direction. A belt unit is configured to be detachably mounted on the apparatus main body. The belt unit includes a belt frame, a plurality of belt support rollers, a belt, and a plurality of transfer members. The plurality of belt support rollers is supported by the belt frame. The belt is movably supported by the plurality of belt support rollers and extends in the predetermined direction. Each of the plurality of transfer members is disposed in confrontation with a corresponding one of the plurality of image bearing members with the belt interposed therebetween. A positioning member fixes, relative to the apparatus main body, each of the plurality of transfer members at a position in the predetermined direction when the belt unit is mounted on the apparatus main body.
38 Citations
20 Claims
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1. An image forming apparatus comprising:
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an apparatus main body; a plurality of image bearing members supported by the apparatus main body and arranged in a predetermined direction; a belt unit configured to be detachably mounted on the apparatus main body, the belt unit including; a belt frame; a plurality of belt support rollers supported by the belt frame; a belt movably supported by the plurality of belt support rollers and extending in the predetermined direction; and a plurality of transfer members each disposed in confrontation with a corresponding one of the plurality of image bearing members with the belt interposed therebetween; and a positioning member that fixes, relative to the apparatus main body, each of the plurality of transfer members at a position in the predetermined direction when the belt unit is mounted on the apparatus main body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A belt unit comprising:
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a belt frame; a plurality of belt support rollers supported by the belt frame; a belt movably supported by the plurality of belt support rollers, the belt extending in a predetermined direction; a transfer roller disposed in confrontation with the belt, the transfer roller having a roller shaft that extends in an axial direction and that has a diameter in a radial direction, the transfer roller being rotatable about the roller shaft; and a regulating member that is provided at an end of the roller shaft and that extends in the radial direction, wherein the transfer roller is mounted on the belt frame so as to be capable of displacing in the radial direction, and the belt frame is formed with a groove having an inner surface, the regulating member being configured to be fitted in the groove such that the regulating member is positioned with respect to the axial direction. - View Dependent Claims (17, 18, 19, 20)
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Specification