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US 6,549,735 B2Granted
Developing apparatus with longitudinal end leakage preventing member in contact with smooth surface part of a developer carrying member
AssigneeCanon Kabushiki Kaisha
InventorsAkiyoshi Fujita, Kenji Matsuda, Tadashi Horikawa
Life of this patent
Estimating the term…
Abstract
The present invention relates to a developing apparatus in which a developer bearing body is provided at its longitudinal part with a roughness formed surface, and a leakage preventing member contacts with the developer bearing body outside of the roughness formed surface in a longitudinal direction.
Claims9
A developing apparatus comprising:
- a developer container containing a developer;
- a developer carrying body provided in an opening portion of said developer container and adapted to carry the developer to a developing position, said developer carrying body including a rough surface area and a smooth surface area provided outside of said rough surface area in a longitudinal direction of said developer carrying body;
- a regulating member for regulating a thickness of a layer of the developer carried on said developer carrying body;
- and
- two leakage preventing members contacted with both longitudinal ends of said developer carrying body to prevent leakage of the developer;
- wherein a length of said regulating member in the longitudinal direction is longer than a space between said two leakage preventing members,
- wherein longitudinal ends of said regulating member are nipped at a portion between said developer carrying body and said leakage preventing member, and
- wherein said nipped portion of said regulating member contacts within said smooth surface area of said developer carrying body.
5 more elements
Dependencies are inferred from the claim text.