Developing device having dual feeding chambers
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United States of America Patent
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Oct 28, 2014
Issued Date -
N/A
app pub date -
Oct 19, 2011
filing date -
Oct 20, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A developing device includes a developer carrying member for carrying developer containing a non-magnetic toner and a magnetic carrier to a position where the developer carrying member is opposed to an image bearing member, and a developing container including a first chamber for accommodating the developer to be supplied to the developer carrying member, a second chamber provided below the first chamber, and an opening for circulating the developer between the first chamber and the second chamber. In addition, a first feeding member and a second feeding member are rotatably provided in the first chamber and the second chamber, respectively, for stirring and feeding the developer. A first magnet member of the first feeding member and a second magnet member of the second feeding member are provided so that same magnetic polarity portions are opposed to each other or so that a ratio of a range in which the same magnetic polarity portions are opposed to each other is greater than a ratio of a range in which opposite magnetic polarity portions are opposed to each other.
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