Abstract: A developing frame for a developing cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus to develop a latent image formed on the electrophotographic photosensitive member, the developing cartridge including a developing roller for developing a latent image formed on an electrophotographic photosensitive member; a toner accommodating portion for accommodating the toner to be used by the developing roller; an application roller for applying the toner on a peripheral surface of the developing roller, the developing frame includes a toner supply opening for supplying to the developing roller the toner accommodated in the toner accommodating portion; a developing roller mounting portion for mounting the developing roller along the toner supply opening; connecting surfaces at which the developing frame is connected with the toner frame including the toner accommodating portion, wherein the connecting surfaces extend in a longitudinal direction of the toner supply openi

Abstract: The present invention provides a cartridge detachably mountable to a main body of an image forming apparatus, comprising a developing frame, a developer carrying member provided in the developer frame and adapted to hold and carry developer, a developer containing container for containing the developer and for supplying the developer to the developer frame, a seal member for unsealably sealing an opening portion through which the developer is supplied from the developer containing container to the developing frame, a rotary member for supplying the developer toward the developer carrying member, a first drive transmitting device for effecting drive transmission between the developer carrying member and the rotary member, and a second drive transmitting device for transmitting the driving to the seal member to unseal the seal member, and wherein at least a part of the first drive transmitting device is provided at one end of the developer carrying member in a longitudinal direction thereof and the second drive

Abstract: A seal part used in a developer container to seal a developer has an aperture portion through which a rotary member extends, the aperture portion being provided with a seal portion contacting with the peripheral surface of the rotary member and preventing the developer from leaking out, and a fitting portion fitting in a recess formed in the frame of the developer container, the fitting portion being formed integrally with the seal portion.

Abstract: A developing cartridge side cover, which is detachably mountable to a main assembly of an electrophotographic image forming apparatus, has an opening for exposing a drive force receiving member for rotating a developing member with a driving force from the main assembly. The side cover further has a developing bias contact mounting for receiving a developing bias to be applied to the developing member from the main assembly.

Abstract: A cartridge detachably mountable to the main assembly of an image forming apparatus includes a developing frame provided with an opening; a developer carrying member in the opening to carry developer; a developer containing portion for storing developer, the developer containing portion supplying developer to the developing frame through the developer supplying opening; a sealing member for removably sealing the developer supplying opening; and a driving source substantially exclusive for providing the force for opening the sealing member.

Abstract: A side cover for a developing cartridge for developing a latent image formed on an electrophotographic photosensitive member, the developing cartridge being detachably mountable relative to electrophotographic image forming apparatus, the developing cartridge including a developing roller, for developing a latent image formed on an electrophotographic photosensitive member; a toner accommodating portion for accommodating toner to be used for development by the developing roller, the toner accommodating portion being provided with a toner supply opening for supplying the accommodated toner to the developing roller; and A toner seal for sealing the toner supply opening, the toner seal being pulled out prior to start of use of the developing cartridge, by which the toner supply opening is unsealed to permit supply of the toner accommodated in the toner accommodating portion to the developing roller, the side cover, includes a shaft support portion for rotatably supporting a shaft at one end of the developing rol

Abstract: A developing cartridge for developing a latent image formed on the photosensitive member, wherein the developing cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus, the developing cartridge includes a cartridge frame; developing means for developing, with toner, the latent image formed on the photosensitive member of the main assembly of the apparatus; a first projected portion outwardly projected from the cartridge frame portion adjacent one longitudinal end of the developing means; a second projected portion outwardly projected from the cartridge frame portion adjacent the other longitudinal end of the developing means; a first urging force receptor portion outwardly projected from the cartridge frame portion adjacent one longitudinal end of the developing means; a second urging force receptor portion outwardly projected from the cartridge frame portion adjacent the other longitudinal end of the developing means; a first contact portion outwardly projected

Abstract: A coupling member for coupling a first frame and a second frame of a process cartridge detachably mountable to a main assembly of an image forming apparatus, the process cartridge including the first frame having an electrophotographic photosensitive member and a photosensitive member mounting portion for mounting the electrophotographic photosensitive member, the second frame having a developing means for developing a latent image formed on the electrophotographic photosensitive member and a developing means mounting portion for mounting the developing means, the coupling member includes a connecting portion for rotatably coupling the first frame and second frame; a spring mounting portion for mounting a spring for applying elastic force to the first frame and second frame; and a coupling member locking portion for locking the coupling member to the second frame.

Abstract: A developing cartridge for developing a latent image formed on the photosensitive member, wherein the developing cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus, the developing cartridge includes a cartridge frame; a developing member for developing a latent image formed on the photosensitive member; a driving force receiving member for receiving driving force for rotating the developing member from the main assembly of the apparatus when the developing cartridge is mounted to the main assembly, the driving force receiving member being exposed from a portion of the cartridge adjacent one longitudinal end of the developing member; a developing bias contact for receiving a developing bias to be applied to the developing member from the main assembly when the cartridge is mounted to the main assembly; a toner accommodating portion for accommodating the toner to be used for development by the developing member; a first light-transmissive member and a second l

Abstract: The present invention provides a developing cartridge attachable to and detachable from a main body of an image forming apparatus comprising a cartridge frame, developing device for developing a latent image formed on an image bearing member, and a shutter member supported by the cartridge frame. The shutter member moves between a covering position for covering a portion exposed from the cartridge frame of the developing device and a retreat position retreated from the covering position. A sheet member, being flexible and interlocking with the shutter member, covers a part of the cartridge frame when the shutter member moves to the covering position. The cover member covers the gripping portion of the frame and a floating developer regulating member.

Abstract: A shutter for a developing cartridge for developing an electrostatic latent image formed on an electrophotographic photosensitive member, the developing cartridge being detachably mountable relative to a main assembly of an electrophotographic image forming apparatus, the improvement being that the shutter is movable between a covering position for covering a portion through which a developing member is exposed from a cartridge frame and a retracted position for exposing the developing member from the cartridge frame; and the shutter includes a developing cartridge discriminating portion which is capable of entering a main assembly side discriminating portion provided in the main assembly to discriminate the developing cartridge when the developing cartridge discriminating portion is aligned with the main assembly side discriminating portion, upon mounting of the developing cartridge to the main assembly.

Abstract: A developing cartridge for developing a latent image formed on an electrophotographic photosensitive member, which is detachably mountable relative to a main assembly of an electrophotographic image forming apparatus, the developing cartridge includes a cartridge frame; a developing roller for developing the electrostatic latent image formed on the electrophotographic photosensitive member; toner accommodating portion for accommodating toner to be used for development by the developing roller; a driving force receiving member for receiving driving force for rotating the developing roller, from the main assembly of apparatus when the developing cartridge is mounted to the main assembly, wherein the driving force receiving member is exposed from a portion of the cartridge frame, provided at one longitudinal end portion; a developing bias contact for receiving a developing bias to be applied to the developing roller from the main assembly of the apparatus, when the developing cartridge is mounted the main assemb

Abstract: A developing cartridge for developing a latent image formed on the photosensitive member, wherein the developing cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus, the developing cartridge includes a cartridge frame; a developing member for developing an electrostatic latent image formed on an electrophotographic photosensitive member; a toner accommodating portion for accommodating the toner to be used for use of the development by the electrostatic latent image; a driving force receiving member for receiving driving force for rotating the developing member from the main assembly of the electrophotographic image forming apparatus when the developing cartridge is mounted to the main assembly; a shutter movable between a cover position for covering a portion through which the developing member is exposed from the cartridge frame and a retracted position for permitting the developing means to be exposed; a flexible seal projected from a cartridge frame portio

Abstract: A developing cartridge for developing a latent image formed on the photosensitive member is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The developing cartridge includes a cartridge frame, a developer device for developing, with toner, the latent image formed on the photosensitive member of the main assembly of the apparatus when the cartridge is mounted to the main assembly of the electrophotographic image forming apparatus, and a first projected portion projected from one longitudinal end of the frame. The first projected portion is supported by a first supporting member provided in the main assembly when the cartridge is mounted to the main assembly of the electrophotographic image forming apparatus. The cartridge also includes a second projected portion projected from the other longitudinal end of the frame.

Abstract: A developing cartridge for developing a latent image formed on the photosensitive member, which is detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes a cartridge frame; a developing device for developing, with toner, the latent image formed on the photosensitive member of the main assembly of the apparatus when mounted to the main assembly of the electrophotographic image forming apparatus; a driving force receptor for receiving, from the main assembly, a driving force for rotating the developing means when the cartridge is mounted to the main assembly, the driving force receptor being provided and exposed adjacent one end of the cartridge frame portion in a longitudinal direction of the developing means; a toner accommodating portion for accommodating the toner; a shutter movable between a closing position for covering a portion of the developing device exposed from the cartridge frame and an opening position for exposing the developing device; and a locking m

Abstract: A process cartridge detachably mountable to a main assembly of an image forming apparatus includes an electrophotographic photosensitive member; a process device actable on the photosensitive member; a first projection for positioning the process cartridge relative to the main assembly when the process cartridge is mounted to the main assembly, the first projection being outwardly projected from a first frame adjacent an axial end of the photosensitive member; a second projection for functioning as a pivot when the process cartridge is removed from the main assembly, the second projection being outwardly projected from a first frame; a third projection for positioning the process cartridge relative to the main assembly when the process cartridge is mounted to the main assembly, the third projection being outwardly projected from a second frame adjacent another axial end of the photosensitive member; a fourth projection for functioning as a pivot when the process cartridge is removed from the main assembly, th

Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus includes an electrophotographic photosensitive drum; a process device actable on the electrophotographic photosensitive drum; a memory element for storing information relating to the process cartridge; a connector including a plurality of connecting contacts, arranged along a line substantially perpendicular to a longitudinal direction of the electrophotographic photosensitive drum, for electrical connection with the main assembly to transmit to the main assembly information stored in the memory element when the process cartridge is mounted to the main assembly, wherein a connecting contacts of the plurality of connecting contacts which is closest to the electrophotographic photosensitive drum is a contact for electrically grounding a substrate of the memory element.

Abstract: A process cartridge detachably mountable to a main assembly of an image forming apparatus, wherein the main assembly of the electrophotographic image forming apparatus is provided with a detecting device for detecting existence of the process cartridge, the process cartridge includes an electrophotographic photosensitive member; a first frame for supporting the electrophotographic photosensitive member; a developing mechanism for developing a latent image formed on the electrophotographic photosensitive member; a second frame for supporting the developing mechanism and rotatably coupled on the first frame; a member to be detected, provided on an upper surface of the first frame and extended bridging between the first frame and the second frame, wherein the member to be detected is capable of being detected by the detecting device to notify mounting of the process cartridge to the main assembly of the electrophotographic image forming apparatus when the process cartridge is mounted to the main assembly of the

Abstract: A developing device which is capable of being detachably mounted to a rotary unit of an image forming apparatus and which includes a developer carrying member for forming a development region together with an image carrying member and rotating as carrying a developer, a developer containing section for containing the developer to be supplied to the developer carrying member, and a pressure relief portion provided in a surface substantially perpendicular to the rotational axis of the rotary unit, of the developer containing section.

Abstract: A process cartridge detachably mountable to a main assembly of an image forming apparatus includes an electrophotographic photosensitive member; a charging member for charging the electrophotographic photosensitive member; a developing device for developing a latent image formed on the electrophotographic photosensitive member; and a charging bias contact, a developing bias contact, and a grounding contact arranged in a particular manner so as to interface in a particular manner with corresponding contacts on the image forming apparatus main assembly.