Image forming apparatus including black photosensitive drum replaceable independently from color photosensitive drums
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United States of America Patent
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Apr 28, 2015
Grant Date -
Apr 17, 2014
app pub date -
Oct 14, 2013
filing date -
Oct 31, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
An image forming apparatus includes a main body, a plurality of photosensitive drums, a process frame, and a process unit. The plurality of photosensitive drums includes a black photosensitive drum and color photosensitive drums. Black toner is used in the black photosensitive drum. Each of yellow, magenta, and cyan toner is used in one of the color photosensitive drums. The black and color photosensitive drums are arranged in a first direction. Each photosensitive drum has an axis extending in a direction perpendicular to the first direction. The process frame supports the color photosensitive drums in fixed positions and is detachably mounted on the main body. The process frame is inserted in a mounting direction to be mounted on the main body. The process unit is detachably mounted in the process frame and supports the black photosensitive drum.
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