Abstract: In an image forming method including a charging step, an exposure step, a development step using a developing roll, a transfer step, a fixing step and a cleaning step of removing a toner remaining on the surface of a photosensitive member after the transfer step, the developing roll has a surface brightness of 30 to 220 and a surface roughness Rz of 1 to 20 ?m, the cleaning blade is a cleaning blade made of a polyurethane elastomer and having a peak value of at most 0.95, a peak temperature of ?15 to 10° C. and a width at half maximum of at least 25° C. in viscoelasticity tan ?, the toner has a volume average particle diameter of 4 to 10 ?m and an average circularity from 0.950 to 0.995, the charge level of the toner on the surface of the photosensitive member is 10 to 80 ?C/g in terms of an absolute value, and the pH of a water extract of the toner is 3 to 8.

Abstract: In an image forming method including a charging step, an exposure step, a development step using a developing roll, a transfer step, a fixing step and a cleaning step of removing a toner remaining on the surface of a photosensitive member after the transfer step, the developing roll has a surface brightness of 30 to 220 and a surface roughness Rz of 1 to 20 ?m, the cleaning blade is a cleaning blade made of a polyurethane elastomer and having a peak value of at most 0.95, a peak temperature of ?15 to 10° C. and a width at half maximum of at least 25° C. in viscoelasticity tan ?, the toner has a volume average particle diameter of 4 to 10 ?m and an average circularity from 0.950 to 0.995, the charge level of the toner on the surface of the photosensitive member is 10 to 80 ?C/g in terms of an absolute value, and the pH of a water extract of the toner is 3 to 8.

Abstract: An electrophotographic image forming apparatus has a photosensitive drum; a charging device for charging a surface of the photosensitive drum; an LED array for projecting a light beam on the surface of the photosensitive drum, thereby forming irradiated spots constituting an electrostatic latent image. The irradiated spots are formed on intersections of a grid which is composed of a plurality of first lines extending in a main-scanning direction and arranged at equal first intervals and a plurality of second lines extending in a sub-scanning direction and arranged at equal second intervals. The apparatus also has a developing device for attaching a toner particle extending to each of the irradiated spots, a transfer device for transferring the toner particle to a transfer material, and a fixing device for fixing the toner particle on the transfer material.

Abstract: A sensor detects the leading edge of the print medium. A position counter counts a time length required for the print medium to advance from where the print medium is detected by the sensor to the photosensitive drum. The position counter also counts a time length for the print medium to advance past the photosensitive drum. The distance of the toner image from the leading edge of the print medium is determined on the basis of the image data of print data. A row counter counts the number of dots in a direction in which the print medium is transported and a column counter counts the number of dots in a direction perpendicular to the direction the print medium is transported. The distance between the first line of an image data and the line in which a first dot to be printed in the image data is determined on the basis of the contents of the column counter and the row counter.

Abstract: An image forming apparatus having a unit for charging the surface of an image carrier uniformly with electricity, the charging unit being contacted by a conductive element which changes a polarity of toner adhering to the unit, a unit for forming an electrostatic latent image on the surface of the image carrier charged electrically, a unit for developing the electrostatic latent image formed on the surface of the image carrier to thereby form a toner image and a means for transferring and fixing the toner image to a transfer member. The developing unit includes a developing roller which is disposed so as to contact the image carrier.

Abstract: An image forming apparatus for collecting, through a developing device, and reusing remaining toner remained on a photosensitive drum, as an image carrier, for forming an electrostatic latent image, without being transferred to a transfer material, includes a toner uniforming member disposed between locations for a charging process and for an exposing process, for making the toner remained on the photosensitive drum during a transferring process adhere slightly and uniformly to the photosensitive drum. The toner uniforming member eliminates the remaining toner remained on the photosensitive drum temporarily, and is applied with a necessary voltage for making the remaining toner eliminated temporarily adhere to the surface of the photosensitive drum again.

Abstract: An image forming apparatus having a unit for charging the surface of an image carrier uniformly with electricity, a unit for forming an electrostatic latent image on the surface of the image carrier charged electrically, a unit for developing the electrostatic latent image formed on the surface of the image carrier to thereby form a toner image and a means for transferring and fixing the toner image to a transfer member. The developing unit includes a developing roller which is disposed so as to contact the image carrier.

Abstract: A transfer assembly of an electrophotographic printer includes a photoconductor drum, a charger disposed against the photoconductor drum for charging a surface of the photoconductor drum, an exposure unit for exposing the charged photoconductor drum to form an electrostatic latent image thereon, a developer unit disposed against the photoconductor drum for providing adhesion of a toner to the electrostatic latent image to form a toner image, a transfer unit disposed against the photoconductor drum for transferring the toner image to a medium, and a fuser for fixing the transferred toner image on the medium. In such an assembly, a part of the transfer unit, which first touches the medium to which the toner image has been transferred, is provided with a conductive material adapted to provide a gradual discharge of electric charge on the medium.