Abstract: A cartridge which is detachably mountable on an image forming apparatus is provided with non-volatile storing medium. In this non-volatile storing medium, a predetermined value is stored. The predetermined value is used for controlling the image forming apparatus together with the count value which is counted when forming images. The count value for counting images formed in a first image formation mode is different from the count value that is counted when forming images in a second image formation mode whose maximum amount of waste toner contained in a cleaning container is different from that of the first image mode. With the structure thus arranged, the number of printable sheets is made greater before the waste toner is filled in the cleaning container up to its limit, hence enabling the user to secure a longer period of time for preparing the cartridge.

Abstract: In a method of mounting a cleaning member in a process cartridge, the cleaning member to be mounted in the process cartridge has in the opposite ends thereof screw-cramping holes for fixing a supporting plate to the frame of the cartridge, and cut-away portions for fitting and inserting thereinto pins for adjustably moving the supporting plate in a direction for adjustment when the mounting position is adjusted before the supporting plate is fixed to the frame, and during the adjustment of the mounting, the pins are fitted in the cut-away portions and the cleaning member has its mounted position adjusted by the pins being moved, and after the cleaning member has been moved to a predetermined position, the opposite sides of the supporting plate are screw-cramped to thereby effect the positioning of the cleaning member.

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 process cartridge detachably mountable to an image forming apparatus, includes an electrophotographic photosensitive member, a process device acting on the electrophotographic photosensitive member, and a memory for transmitting information regarding at least the process means to the image forming apparatus. The memory means is attached to a front end face of the process cartridge into the image forming apparatus to be connected to a connector member of the image forming apparatus.

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 developing apparatus includes a developer container, having an opening, for containing a developer, a developer carrying member in the opening, an elastic developer layer thickness regulating member, elastically press-contacted to the developer carrying member and extended along a length of the developer carrying member, for regulating a thickness of a layer of the developer on the developer carrying member, a pair of end seals, contacted to longitudinal end portions of the developer carrying member, for preventing movement of the developer to an end of the developer container wherein a surface of the pair of end seals adjacent to the regulating member are press-contacted to longitudinal end surfaces of the regulating member, and a developer scatter preventing sheet cooperating with the developer carrying member to form a nip permitting passage of the developer into the container while preventing scattering of the developer.

Abstract: An image forming apparatus having a cartridge includes an image forming device acting on an image bearing member and a driving force transmitting device which is adapted to transmit a driving force from an apparatus side to a cartyridge side and which is separable from the image forming device. The apparatus also includes a drive source. The image forming device and the driving force transmitting device are integrally mountable to the apparatus.

Abstract: A process cartridge detachably mountable to an image forming apparatus includes an image bearing member; a plurality of developing devices for supplying a developer to the image bearing member, the developing devices each having a first electric contact; a second electric contact for establishing electric connection with the apparatus when the cartridge is mounted in the image forming apparatus; and a selector for selecting one of the first electric contacts, the selector being effective to electrically connecting the selected first electric contact and the second contact.

Abstract: A developing cartridge includes a developing device having a containing portion containing developer and a bearing member for bearing the developing device, a support member adapted to rotatably support the developing device and having an opening portion, and a lock for locking a rotation of the developing device with respect to the support member at a position there the bearing member is not aligned with the opening portion.

Abstract: An image forming apparatus usable with a process cartridge for forming an image on a recording material. The process cartridge includes an image bearing member, and at least one developing device for developing a latent image formed on the image bearing member with a developer. Each of said at least one developing devices includes a developer accommodating device for accommodating a respective developer to be used in said at least one developing device.

Abstract: A process cartridge has an electrophotographic photoconductive member and a developing device for developing a latent image on the photoconductive member as a unit and which is detachable from the apparatus body, and a multiple image forming apparatus with the cartridge mounted therein. Since a contact portion for bringing a developing agent bearing member of a developing device in the apparatus body into contact with the process cartridge is disposed on the side of the process cartridge, it is possible to improve the positioning accuracy of the photoconductive member in the cartridge and the developing device in the apparatus body.

Abstract: The present invention provides the image forming system in which, when an image bearing member or a process cartridge including an image bearing member therein is mounted within an image forming system having a shiftable image forming device, the image bearing member can receive a driving force from the image forming device. Consequently, it is possible to reduce the number of positioning locations between the image forming system and the image bearing member.

Abstract: An image forming apparatus includes a detachably mountable process cartridge, the process cartridge including an image bearing member and a color developing device actable on the image bearing member, the color developing device containing plural developing units having yellow developer, respectively; detachably mountable developing device actable on the image bearing member in the process cartridge, the detachably mountable developing device containing black developer and being detachably mountable independently of the process cartridge; and a device for forming a latent image on the image bearing member; a transfer device for transferring a developed image from the image bearing member to a recording material.

Abstract: An image forming apparatus capable of performing a suitable transport that is free from the occurrence of an inner blank, and is free from image or color misalignment. A transfer member supporting member, for supporting a transfer member at a transfer position at which the toner image on the image carrier is transferred to the transfer member, has a dielectric layer defining its outer surface and an elastic layer provided inside the dielectric layer. The elastic layer preferably has a compression range between about 0 to 2 mm at the transfer position, and the total pressure of this compression is about 1 kg/mm in this compression range.

Abstract: The present invention relates to an image forming system and a process cartridge mountable thereon. A developing device can be separated into a first portion including a developing roller and a second portion including a toner containing member, and the second portion can be removably mounted on the cartridge. Thereby, it is possible to utilize the toner containing containers effectively without repeating the positioning of the developing roller with respect to a photosensitive member.

Abstract: A process cartridge integrally supports an electrophotographic photosensitive member and a plurality of developing units and removable with respect to an image forming apparatus. The driving force from the image forming apparatus can be selectively transmitted to any one of the developing units and the transmission of the driving force to all of the developing units is blocked during the non-image forming process. Thus, the operability of dismounting of the cartridge from the image forming apparatus is improved.