Abstract: At least one of driving motors that drive a developing device independently of each other is provided on a door capable of opening and closing to allow the developing device to be attached to or detached from a main body of an apparatus. An electrical contact portion that can be electrically connected to or disconnected from an electrical circuit provided in the main body is provided for the driving motor provided on the door.

Abstract: An image forming apparatus has a tray, which is able to be drawn out of the apparatus and on which a plurality of cartridges of different sizes can be mounted. A cartridge, being the largest in size among a plurality of process cartridges, is detachably arranged at a location at which it is first exposed to outside when a cartridge tray is drawn out. A developer storage portion of the largest cartridge has the largest capacity and stores a developer of a black color.

Abstract: At least one of driving motors that drive a developing device independently of each other is provided on a door capable of opening and closing to allow the developing device to be attached to or detached from a main body of an apparatus. An electrical contact portion that can be electrically connected to or disconnected from an electrical circuit provided in the main body is provided for the driving motor provided on the door.

Abstract: A photosensitive member unit detachably mountable to each of a plurality of image forming apparatuses including a voltage supplying mechanism adapted to different commercial power sources. The photosensitive member unit includes a photosensitive member on which an electrostatic image is to be formed; a resistor configured and positioned to generate heat so as to heat said photosensitive member by energization; and a plurality of contact portions, configured and positioned to be selectively connectable to the voltage supplying mechanism, including a first contact portion and a second contact portion which are connected to both ends of said resistor and including a third contact portion connected so as to divide the resistor into two branches. At least one of the contact portions used for supplying a voltage to the resistor is common to different commercial power source voltages.

Abstract: An electrophotographic image forming apparatus is provided. The apparatus comprises a movable member including a mounting portion for detachably mounting a cartridge, with the movable member being movable from an outside toward an inside of a main assembly of the apparatus while supporting the cartridge. The apparatus further comprises an output contact and an intermediary electrical contact configured and positioned to supply a bias voltage received by the output contact to the cartridge, with intermediary electrical contact being disposed on the mounting portion and being elastically deformable in a moving direction in which the movable member is movable between the outside and the inside. The cartridge includes an input electrical contact and a cartridge side contact portion.

Abstract: An electrophotographic image forming apparatus includes a main assembly mounting a process cartridge, a movable member movable from outside to inside the main assembly while supporting the cartridge, and an intermediary electrical contact supplying a bias voltage to the cartridge and disposed at a downstream side of the movable member. The cartridge includes an electrophotographic photosensitive drum, process means actable on the drum, an input electrical contact at a leading end with respect to the moving direction of the movable member when the cartridge is supported on the movable member and contacting the intermediary electrical contact when the cartridge is supported on the movable member, a contact portion provided at an upstream side with respect to the moving direction and contactable to the movable member when the input electrical contact is contacted by the intermediary electrical contact and is elastically urged by the intermediary electrical contact.

Abstract: An image forming apparatus has a tray, which is able to be drawn out of the apparatus and on which a plurality of cartridges of different sizes can be mounted. A cartridge, being the largest in size among a plurality of process cartridges, is detachably arranged at a location at which it is first exposed to outside when a cartridge tray is drawn out. A developer storage portion of the largest cartridge has the largest capacity and stores a developer of a black color.

Abstract: An image forming apparatus has a tray, which is able to be drawn out of the apparatus and on which a plurality of cartridges of different sizes can be mounted. A cartridge, being the largest in size among a plurality of process cartridges, is detachably arranged at a location at which it is first exposed to outside when a cartridge tray is drawn out. A developer storage portion of the largest cartridge has the largest capacity and stores a developer of a black color.

Abstract: An image forming apparatus includes an image bearing member for carrying a latent image; a developing device including a rotatable developer carrying member for carrying a developer and for supplying the developer to the image bearing member, a developer feeding member, provided rotatably in a developing container containing the developer, for feeding the developer, a first driving force receiving member, provided at one end portion of the developer carrying member with respect to a rotational axis direction of the developer carrying member, for receiving a driving force for driving the developer carrying member, a second driving force receiving member, provided at the other end portion of the developer carrying member with respect to the rotational axis direction of the developer carrying member, for receiving a driving force for driving the developer feeding member, abutment members provided at respective end portions of the developer carrying member to determine a gap between the image bearing member and t

Abstract: An image forming apparatus includes an image bearing member; a developing device including a developer carrying member for supplying the developer to the image bearing member, a developer feeding member, provided rotatably in a developing container, first and second driving force receiving members, provided at opposite end portions of the developer carrying member, for driving the developer carrying member and the developer feeding member, respectively; a first and second drive inputting members, for inputting drive to the first and second driving force receiving members, respectively. Directions, toward and away from the image bearing member, of forces are applied to abutment members, which determine a gap between the image bearing member and the developer carrying member, at the time when the drives are inputted to the first driving force receiving member and the second driving force receiving member, respectively.

Abstract: At least one of driving motors that drive a developing device independently of each other is provided on a door capable of opening and closing to allow the developing device to be attached to or detached from a main body of an apparatus. An electrical contact portion that can be electrically connected to or disconnected from an electrical circuit provided in the main body is provided for the driving motor provided on the door.

Abstract: An image forming apparatus has a tray, which is able to be drawn out of the apparatus and on which a plurality of cartridges of different sizes can be mounted. A cartridge, being the largest in size among a plurality of process cartridges, is detachably arranged at a location at which it is first exposed to outside when a cartridge tray is drawn out. A developer storage portion of the largest cartridge has the largest capacity and stores a developer of a black color.

Abstract: A photosensitive member unit detachably mountable to each of a plurality of image forming apparatuses including a voltage supplying mechanism adapted to different commercial power sources. The photosensitive member unit includes a photosensitive member on which an electrostatic image is to be formed; a resistor configured and positioned to generate heat so as to heat said photosensitive member by energization; and a plurality of contact portions, configured and positioned to be selectively connectable to the voltage supplying mechanism, including a first contact portion and a second contact portion which are connected to both ends of said resistor and including a third contact portion connected so as to divide said resistor into two branches. At least one of the contact portions used for supplying a voltage to said resistor is common to different commercial power source voltages.

Abstract: An image forming apparatus has a tray, which is able to be drawn out of the apparatus and on which a plurality of cartridges of different sizes can be mounted. A cartridge, being the largest in size among a plurality of process cartridges, is detachably arranged at a location at which it is first exposed to outside when a cartridge tray is drawn out. A developer storage portion of the largest cartridge has the largest capacity and stores a developer of a black color.

Abstract: An image forming apparatus includes an image bearing member; a developing device including a developer carrying member for supplying the developer to the image bearing member, a developer feeding member, provided rotatably in a developing container, first and second driving force receiving members, provided at opposite end portions of the developer carrying member, for driving the developer carrying member and the developer feeding member, respectively; a first and second drive inputting members, for inputting drive to the first and second driving force receiving members, respectively. Directions, toward and away from the image bearing member, of forces are applied to abutment members, which determine a gap between the image bearing member and the developer carrying member, at the time when the drives are inputted to the first driving force receiving member and the second driving force receiving member, respectively.

Abstract: A developer container for an image forming apparatus, said developer container including a rotatable member; a container body for containing a developer; a sealing member, provided in the container body, for preventing leakage of the developer out of the container body; a sheet, provided in the container body, for contacting the rotatable member to guide the developer into the container body; a gap provided between the container body and the sealing member and covered by the sheet; a communication hole provided in the container body in fluid communication with the gap; packing material filled in the gap through the communication hole for preventing leakage of the developer through the gap.

Abstract: A developer container for an image forming apparatus, said developer container including a rotatable member; a container body for containing a developer; a sealing member, provided in the container body, for preventing leakage of the developer out of the container body; a sheet, provided in the container body, for contacting the rotatable member to guide the developer into the container body; a gap provided between the container body and the sealing member and covered by the sheet; a communication hole provided in the container body in fluid communication with the gap; packing material filled in the gap through the communication hole for preventing leakage of the developer through the gap.

Abstract: In an image forming apparatus in which a tray, on which a plurality of cartridges of different sizes can be mounted, is able to be drawn out, a waste of space occurs. A cartridge (50k), being the largest in size among a plurality of process cartridges (50y, 50m, 50c, 50k), is detachably arranged at a location at which it is first exposed to outside when a cartridge tray (13) is drawn out. A developer storage portion having the largest capacity stores a developer of a black color.

Abstract: A developer container for an image forming apparatus, said developer container including a rotatable member; a container body for containing a developer; a sealing member, provided in the container body, for preventing leakage of the developer out of the container body; a sheet, provided in the container body, for contacting the rotatable member to guide the developer into the container body; a gap provided between the container body and the sealing member and covered by the sheet; a communication hole provided in the container body in fluid communication with the gap; packing material filled in the gap through the communication hole for preventing leakage of the developer through the gap.

Abstract: An electrophotographic image forming apparatus including a main assembly of the apparatus to which a process cartridge is detachably mountable, the apparatus includes a movable member which movable from an outside toward an inside of the main assembly of the apparatus while supporting the process cartridge; an output contact provided in the main assembly of the apparatus; an intermediary electrical contact for supplying a bias voltage received by the output contact to the process cartridge, the intermediary electrical contact being disposed at a downstream side of the movable member with respect to a moving direction of the movable member from the outside toward the inside and being elastically flexed in the moving direction, wherein the process cartridge includes an electrophotographic photosensitive drum, process means actable on the electrophotographic photosensitive drum, an input electrical contact which is at a leading end with respect to the moving direction in the state that process cartridge is suppo