Abstract: There is disclosed a developing device including a toner hopper, a toner supply source, a toner table on which a toner is laid, an agitator for carrying the toner to the toner table from the toner hopper, a magnet roller disposed above the toner table, a developing sleeve which covers an outer periphery of the magnet roller, holds a magnetic carrier, allows the toner of the toner table to be adsorbed onto the magnetic carrier, and shifts and attaches the toner to an electrostatic latent image of a photosensitive drum, a doctor blade disposed close opposite to the developing sleeve, and a developer returning member which is disposed between the developing sleeve and the toner hopper and is positioned in a position higher than a position of the toner table to prevent the toner cut/removed by the doctor blade from dropping toward the toner hopper and to return the cut/removed toner to the toner table, and which has a tip end displaced toward the developing sleeve from the boundary of the toner table and the tone

Abstract: The image forming apparatus according to the present invention includes: a photosensitive drum on which an electrostatic image is formed; a developing device for developing the electrostatic image by a magnetic toner serving as a visualizing material carried by a developing sleeve, said developing device being located below the center of said photosensitive drum; and a toner spatter prevention sheet provided near said photosensitive drum, having an ozone remover for removing ozone by absorbing and/or decomposing ozone.

Abstract: An image forming apparatus according to the present invention has a developing roller for supplying a developer to a developing target, a housing for accommodating the developer, and an agitating member having a sheet-like member with a plurality of fin-like portions arranged in an axial direction of the developing roller and which are polygons each having a first free length extending from a rotational axis parallel with a rotational axis of the developing roller in a circumferential direction toward a wall surface of the housing, the fin-like portion having an opening formed in a portion thereof. When the agitating member is rotated to rotate the sheet-like member along an inner wall of the housing, the developer can be efficiently conveyed to the developing roller and dispersed in the axial direction of the developing roller for agitation. Thus, a difference in density is prevented from occurring in an output image.

Abstract: An image forming apparatus according to the present invention has a developing roller which supplies a developer to a developing target, a housing which contains the developer, a developer agitating member which is rotated about a rotation center defined at a predetermined position in the housing and below a rotation center of the developing roller in the vertical direction, a table-like area which is defined at a predetermined position in the housing and temporally supports the developer material moved between the developing roller and the developer agitating member, and a developing apparatus included of a projective member for controlling the amount of the developer which is supplied onto the outer circumference of the developing roller.

Abstract: The developing device of the present invention includes a developing magnet roller to supply developer to images to be developed, a first conveying auger arranged with a specified gap provided between the developing magnet roller to convey developer while stirring in the first longitudinal direction and supply developer to the developing magnet roller and a second conveying auger provided below the first conveying auger to receive developer conveyed from the first conveying auger and convey this received developer while stirring in the second longitudinal direction that is reverse to the first longitudinal direction and convey developer by circulating between the first conveying auger. This developing device further includes a housing to house the first conveying auger and developer so as to uniformly supply it to the developing magnet roller along the longitudinal direction irrespective of the developer accumulate height along the longitudinal conveying direction by the first conveying auger.