摘要:
A developing apparatus for developing a latent image formed on an electrophotographic photosensitive member, includes (a) a developer carrying member for feeding a magnetic developer to develop a latent image formed on the electrophotographic photosensitive member with the magnetic developer, wherein a magnet is disposed in the developer carrying member; (b) a magnetic seal member provided at each of one and the other longitudinal ends of the developer carrying member with a clearance from a peripheral surface of the developer carrying member to prevent leakage of the developer in a longitudinal direction of the developer carrying member; (c) a developer regulating member provided contacted to the peripheral surface of the developer carrying member to prevent reentering of the developer having passed through the gap between the developer carrying member and the magnetic seal member.
摘要:
A magnetic seal mounting method for mounting a magnetic seal member to a developing frame which has a magnetic seal mounting portion extended in a direction crossing with a longitudinal direction of a developing roller mounting portion for mounting a developing roller at each of one and the other longitudinal ends of the developing roller mounting portion, and a supporting member mounting portion for mounting a supporting member for supporting a developing blade extended along the longitudinal direction of the developing roller mounting portion, the method including the steps of: (a) engaging the magnetic seal member to the magnetic seal mounting portion while an elastic member between the magnetic seal mounting portion and the magnetic seal member is deformed, when the magnetic seal member is mounted to the magnetic seal mounting portion; (b) mounting the supporting member to a developing frame so that position of the magnetic seal member is regulated by the supporting member for supporting the developing blade to prevent disengagement of the magnetic seal member mounted to the magnetic seal mounting portion therefrom, thus mounting the developing blade; and (c) mounting the developing roller to the developing roller mounting portion provided in an including while flexing the developing blade after the developing blade is mounted to the developing frame.
摘要:
A disassembling tool pushes first and second coupling members out of a process cartridge that also has an electrophotographic photosensitive member, and first and second coupling members for rotatably coupling first and second frames of the cartridge together. The disassembling tool includes first and second base bodies, first and second engagement portions provided on the first and second base bodies respectively, and engageable with the cartridge to position the cartridge when the tool is mounted on the cartridge, and first and second pushing-out portions provided for movement relative to the first and second base bodies, respectively, for pushing out the first and second coupling members, respectively. The first and second engagement portions are provided at a location opposed to the first and second pushing-out portions, respectively, in a movement direction in which the first and second pushing-out portions are moved, respectively.
摘要:
A developing device develops an electrostatic latent image formed on an electrophotographic photosensitive member. The developing device is mountable to a main assembly of an electrophotographic image forming apparatus. The developing device includes a developer carrying member for feeding a developer to the electrophotographic photosensitive member to develop the electrostatic latent image formed on the electrophotographic photosensitive member, a first electroconductive portion, a second electroconductive portion for cooperating with the first electroconductive portion to provide an electrostatic capacity, a first electrical contact for receiving a voltage to be applied to the first electroconductive portion from the main assembly of the electrophotographic image forming apparatus, and a second electrical contact for transmitting, to the main assembly of the electrophotographic image forming apparatus, an electric signal corresponding to an electrostatic capacity between the first electroconductive portion and the second electroconductive portion when a voltage is applied to the first electroconductive portion to detect a remaining amount of the developer by the main assembly of the electrophotographic image forming apparatus.
摘要:
A developing device to be mounted on an electrophotographic image forming apparatus main body and used for developing an electrostatic latent image formed on an electrophotographic photosensitive member, includes a developing container, an electrode attached to the inside of the developing container, a conductive member for securing electric conduction from the inside to the outside of the developing container, wherein the conductive member and the electrode are electrically connected by the conductive member being press-fit in a fitting portion provided in the electrode, and an elastic sealing member press-fit in a gap between the conductive member and the developing container.
摘要:
A developing device develops an electrostatic latent image formed on an electrophotographic photosensitive member. The developing device is mountable to a main assembly of an electrophotographic image forming apparatus. The developing device includes a developer carrying member for feeding a developer to the electrophotographic photosensitive member to develop the electrostatic latent image formed on the electrophotographic photosensitive member, a first electroconductive portion, a second electroconductive portion for cooperating with the first electroconductive portion to provide an electrostatic capacity, a first electrical contact for receiving a voltage to be applied to the first electroconductive portion from the main assembly of the electrophotographic image forming apparatus, and a second electrical contact for transmitting, to the main assembly of the electrophotographic image forming apparatus, an electric signal corresponding to an electrostatic capacity between the first electroconductive portion and the second electroconductive portion when a voltage is applied to the first electroconductive portion to detect a remaining amount of the developer by the main assembly of the electrophotographic image forming apparatus.
摘要:
A simple method for remanufacturing a process cartridge which includes removing a first cover, removing a second cover, separating frames, removing a fixing pin, removing a developing roller, refilling developer, positioning provisionally a supporting frame to a developing frame, attaching the developing roller, attaching the supporting frame, connecting a first frame and connecting a second frame.
摘要:
A process cartridge has an electrophotographic photosensitive drum, a developing member, a first frame for supporting the electrophotographic photosensitive drum, a second frame for supporting the developing member, a coupling pin for coupling the first frame to the second frame to be rotatable relative to each other, a first hole through which the coupling pin penetrates and which is provided in the first frame, a second hole into which the coupling pin is press-fitted and which is provided in the first frame, and a closed portion provided at a leading end of the coupling pin in a press fit direction in order to close the second hole.
摘要:
A developing device is detachably mountable to the main body of an electrophotographic image forming apparatus. The device is for developing an electrostatic latent image on an electrophotographic photosensitive member and includes a developing member for developing the electrostatic latent image formed on the electrophotographic photosensitive member, a developer container containing therein a developer to be used to effect the development of the electrostatic latent image by the developing member, a developing frame for supporting the developing member, a welding rib provided along the lengthwise direction of the developing frame to connect the developer container and the developing frame together by-ultrasonic welding, and a plurality of reinforcing members provided on the back of that surface of the developing frame on which the welding rib is provided, along the lengthwise direction of the welding rib, to increase the strength of the developing frame. The welding rib provided on the developing frame is disposed so as to be located between the plurality of reinforcing members as viewed from a direction intersecting with the surface and the back, and the developer container and the developing frame are connected together by the ultrasonic welding.
摘要:
A developing device includes a container for containing a magnetic developer therein, a developer carrier for carrying and conveying the magnetic developer in the container, a magnetic member for forming a magnetic seal area of a predetermined gap with respect to the surface of the developer carrier in the end portions of the developer carrier along the circumferential direction of the developer carrier. The magnetic member has a plurality of magnetic poles along the circumferential direction of the developer carrier in the magnetic seal area, and an external magnetic pole provided outside the endmost magnetic pole forming the magnetic seal for conveying a magnetic flux travelling from the endmost magnetic pole toward the outside of the magnetic seal area.