| 摘要 |
A magnetic brush developing apparatus has a developing casing having a developer supply station and a developing station, a magnetic brush carrier member in the developing casing between the developer supply station and the developing station, and a magnet roller member rotatably mounted within the magnetic brush carrier member and driven in one direction for moving a developer in the form of a magnetic brush around the peripheral surface of the magnetic brush carrier member in a direction opposite the one direction from the developer supply station to the developing station. A scraping member is positioned along and contacting the portion of the peripheral surface of the magnetic brush carrier member extending in the opposite direction from the developing station, the scraping member having a scraping portion for scraping developer carried past the developing station from the magnetic brush carrier member for allowing it to fall away from the scraping member, and a guide portion extending from the scraping portion to the peripheral surface of the magnetic brush carrier member at a position spaced therealong in the one direction from the point where developer is scraped from the magnetic brush carrier member, the ends of the guide portion and the scraping portion remote from the magnetic brush carrier being connected and sufficiently close to the magnet roller member to allow developer not fallen away from the scraping member to flow therealong and back to the magnetic brush carrier member under the effect of the magnet roller member.
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