Patent ID: 8554106
Filing Date: 2013-10-08
Classification: G03G

Abstract:
1. A developing device comprising: a housing configured to store magnetic developer; a developer bearing member supported by the housing comprising a magnet member disposed in the developer bearing member, wherein the developer bearing member rotates within the housing; a developer regulating member positioned substantially parallel to the developer bearing member and being configured to regulate an amount of the developer held on the developer bearing member, the developer regulating member having one or more recess-shaped cut portions each comprising a first side-wall surface portion and a second side-wall surface portion that each extends upwardly from a respective end portion of a lower surface portion of the recess-shaped cut portion such that the recess-shaped cut portion includes an opening partially bounded by the lower surface portion and the first and second side-wall surface portions; and one or more magnetic sealing members which extend along an outer peripheral surface of the developer bearing member positioned proximate an end portion of the developer bearing member wherein a portion of the magnetic sealing member is positioned substantially within the opening and between the first and second side-wall surface portions of the recess-shaped cut portion of the developer regulating member, a surface of the magnetic sealing member faces the developer bearing member and an opposite surface of the magnetic sealing member faces the lower surface portion of the cut portion, and a width of the magnetic sealing member is smaller than a width of the cut portion.