Canon Kabushiki Kaisha

Yusuke Usui

Takashi Kase

Masaaki Sato

Tatsuya Suzuki

Yuta Isobe

Takahiro Ikeda

Kouki Yano

Takanori Watanabe

Shinjiro Toba

Yosuke Kashiide

Motoki Adachi

Kohei Matsuda

Satoshi Nishiya

Motonari Ito

Takashi Hiramatsu

Akihisa Matsukawa

Kuniaki Tamagaki

Hiroyoshi Iwayama

Kazuhiro Yamauchi

Hiroomi Matsuzaki

Koji Wada

Tetsuo Uesugi

Naoki Okamoto

Kojiro Yasui

Masaaki Matsushita

Tatsuo Fujisaki

Junichi Matsumura

Takayuki Kanazawa

Masaki Furutani

A developing apparatus includes a developer bearing member bearing a developer on a surface in a developing operation, a regulating member configured to regulate layer thickness of the developer borne on the developer bearing member, a development chamber provided with the developer bearing member and the regulating member and having an opening, a storage chamber to store the developer, and a conveying member to convey the developer stored in the storage chamber to the development chamber through the opening. When the developing operation is performed, a bottom section of the development chamber is located above a bottom section of the storage chamber in a vertical direction, and a contact region of the developer bearing member in contact with the regulating member is located directly above the opening in the vertical direction.

Developing apparatus having a layer thickness regulating member, cartridge, and image forming apparatus

An image forming apparatus includes an image bearing member, a charging member, a charging voltage source, an electrostatic image forming portion, a developing device, a developing voltage source, a transfer portion, a transfer voltage source, and a controller. During image formation, the toner remaining on the image bearing member after transfer is collected into the developing device while forming an image. In a cleaning operation performed during non-image formation, while rotating the image bearing member, the controller transfers the toner from the charging member onto the image bearing member, passes the toner through the developing portion in an urged state, reverses a charge polarity of the toner to a normal polarity at a charging portion, and then transfers the toner reversed in charge polarity from the image bearing member onto the developing member at the developing portion to collect the toner in the developing device.

Image forming apparatus

Provided is a remanufacturing method of a developer accommodating unit including a flexible container provided with an opening and configured to accommodate developer, and a frame member configured to accommodate the flexible container. The remanufacturing method includes refilling the developer into the flexible container.

Remanufacturing method of developer accommodating unit

A developing apparatus includes a developer bearing member configured to bear a developer on a surface, a regulating member that regulates layer thickness of the developer on the developer bearing member, and a developer conveying member. In addition, a frame has a development chamber in which the developer bearing member and the regulating member are provided, a storage chamber in which the conveying member is provided and the developer is stored, and an opening through which the developer passes into the development chamber. The developing apparatus collects the developer remaining on the developer bearing member into the storage chamber after the developer on the developer bearing member is transferred onto a transfer material. The regulating material includes a step portion that forms a gap between the regulating member and the developer bearing member.

Developing apparatus having a layer thickness regulation member, cartridge, and image forming apparatus

Provided is a remanufacturing method of a developer accommodating unit including a frame member configured to accommodate a flexible container for accommodating developer. The remanufacturing method includes taking out the flexible container from the inside of the frame member, and refilling the developer into the flexible container.

A developing apparatus includes a developer bearing member configured to bear a developer on a surface, a regulating member that regulates layer thickness of the developer on the developer bearing member, and a development chamber provided with the developer bearing member and the regulating member and having an opening. A storage chamber stores the developer, and a conveying member in the storage chamber conveys the stored developer to the development chamber through the opening. The developing apparatus collects, after the developer on the image bearing member is transferred onto a transfer material, the developer remaining on the image bearing member into the storage chamber, wherein a bottom section of the development chamber is located above a bottom section of the storage chamber in a vertical direction. A contact region of the developer bearing member in contact with the regulating member is located directly above the opening in the vertical direction.

Developing apparatus, cartridge, and image forming apparatus

An image forming apparatus includes: an image bearing member; a charging member for electrically charging the image bearing member in contact with the image bearing member; and a developing member for supplying developer in contact with the image bearing member. The developer remaining on the image bearing member after transfer is collected by the developing member. A Martens hardness HMR of a surface of the charging member and a Martens hardness HMD of a surface of the developer satisfy the following relationship:

Cartridge and image forming apparatus

An image forming apparatus includes a controller that executes a collection sequence to collect developer of opposite polarity adhering to a charging member. The controller executes the collection sequence by setting a first potential difference to allow the developer of opposite polarity to move from the charging member to an image bearing member, setting a second potential difference to allow the developer of opposite polarity to move from the image bearing member to a developer bearing member and to allow the developer of regular polarity to move from the developer bearing member to the image bearing member, setting a third potential difference to not allow the developer of regular polarity to move from the image bearing member to the charging member, and setting a fourth potential difference to allow the developer of regular polarity to move from the image bearing member to the developer bearing member.

A developer accommodating unit for accommodating a developer includes: an accommodating portion, provided with an opening, for accommodating the developer; a sealing member for sealing the opening; and an unsealing member rotatable for winding up the sealing member. The sealing member is peelable off from the accommodating portion to unseal the opening in a first unsealing direction and a second unsealing direction opposite to the first unsealing direction.

Developer accommodating unit, developing device, process cartridge and image forming apparatus

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Tokyo, Japan

Yusuke Usui