CPC G03G 21/206 (2013.01) [G03G 15/0812 (2013.01); G03G 15/0815 (2013.01); G03G 2221/1645 (2013.01)] | 13 Claims |
1. A developing device comprising:
a developing roller;
a regulation blade to regulate a thickness of a toner layer attached to an outer circumference of the developing roller;
a blade bracket to support the regulation blade; and
an inner duct including an air supply port and extending in a longitudinal direction of the developing roller to form a flow path of air to cool the blade bracket, wherein the air supply port is located at a side of the inner duct in the longitudinal direction, and wherein a length of the air supply port is in a range of 25 to 50% of a length of the inner duct.
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