FIELD: image forming devices.
SUBSTANCE: present invention refers to the developing device and to the process cartridge, which are applicable to the electrophotographic or electrostatic type image forming apparatuses, and refers to the image forming apparatus. Claimed developing device comprises: the developing container, which is designed with the possibility of placement of the developing agent, the rotating element that transfers the developing agent, which is designed with the possibility of transfer of the developing agent, a magnetic field generation means, which are provided inside the mentioned developing agent transfer element and configured in order to form the magnetic field, magnetic elements made, which are designed with the possibility of magnetizing by the surrounding magnetic field, the mentioned magnetic elements are provided at the corresponding end sections of the mentioned developing agent transfer element relative to the axial direction of the mentioned developing agent transfer element with the clearance to the outer peripheral surface of the mentioned developing agent transfer element, and magnet elements, which are configured in order to form the magnetic field, at this the mentioned magnet elements are provided at the corresponding end sections with respect to the axial direction of the mentioned developing agent transfer member, and with respect to the axial direction of the mentioned developing agent transfer element the mentioned magnet elements are provided outside of the mentioned magnetic elements and are provided opposite to the mentioned magnetic elements with such gaps up to the mentioned magnetic elements, the outer peripheral surface of the mentioned developing agent transfer element includes the first region, in order to magnetize the mentioned magnetic elements, with respect to the axial direction of the mentioned developing agent transfer element, including the developing region that corresponds to the image forming region and the second region that is external and adjacent to the first region and has the lower developing agent supply capability, than in the first region, or practically lacking the ability to supply, and with respect to the axial direction of the mentioned developing agent transfer element, the first region is bigger that the area between the outer surfaces of the mentioned magnetic elements and less than the area between the inner surfaces of the mentioned magnet elements.
EFFECT: technical result is to provide the possibility to eliminate such drawbacks as the developing agent stagnation in the developing agent receiving section and deterioration of the developing agent quality because of the developing agent sliding off due to the developing agent transfer element in the case, where the magnetic sealing members are used.
8 cl, 8 dwg
