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AssigneeRicoh Company, Ltd.
InventorsToshio Kojima, Kyohta Koetsuka, Noriyuki Kamiya, Rei Suzuki, Tadaaki Hattori, Yoshiyuki Takano, Masayuki Ohsawa, Hiroya Abe, Takashi Innami
Estimating the term…
An image forming device comprises a process cartridge. The process cartridge comprises a development roller. The development roller comprises a magnet roller and a developing sleeve 132. The magnet roller is fixed. The depressions 139 each having an oval shape are formed on the external surface of the developing sleeve 132. Both ends of the depressions 139 which are adjacent with each other along the longitudinal direction of the developing sleeve 132 are overlapped with each other and both ends of the depressions 139 which are adjacent with each other along the circumferential direction of the developing sleeve 132 are spaced with each other.
A development roller comprising:
A process cartridge comprising at least a developing device, the developing device including a development roller that comprises:
An image forming device at least comprising a photo-conductive drum, an electrically charging device, and a developing device including a development roller that comprises:
Dependencies are inferred from the claim text.