Developing apparatus having multi-part regulating member, process cartridge and electrophotographic image forming apparatus
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United States of America Patent
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Sep 11, 2018
Grant Date -
Feb 1, 2018
app pub date -
Jul 25, 2017
filing date -
Jul 29, 2016
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A developing apparatus includes a developer carrying roller rotatable in a first rotating direction, and a developer regulating member which controls a thickness of a developer layer carried on a surface of the developer carrying roller. The developer regulating member has a developer layer thickness regulating part abutting with the surface of the developer carrying roller and a projecting part. The projecting part extends towards an upstream side in the first rotating direction from the abutting part, and a non-contacting gap is formed between the projecting part and the surface of the developer carrying roller. The projecting part has a concave shape at a side facing the developer carrying roller that follows an arc-shaped surface of the developer carrying roller and forms a portion having a gap width H and a continuous length L.
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