Abstract: A recording medium carrier system of an image forming apparatus is constituted by independent units as a paper supply cassette, a paper feed unit, a transfer unit, a fixing unit, and a paper ejecting unit. An intermediate transfer unit in the transfer unit is provided with an intermediate transfer belt to which a toner image formed on a photoconductive drum is primarily transferred at a primary transfer position and which secondarily transfers the toner image on a recording medium at a secondary transfer position, and a driving roller for circulating the intermediate transfer belt. The primary transfer position is arranged close to the driving roller.

Abstract: A recording medium carrier system of an image forming apparatus is constituted by independent units as a paper supply cassette, a paper feed unit, a transfer unit, a fixing unit, and a paper ejecting unit. An intermediate transfer unit in the transfer unit is provided with an intermediate transfer belt to which a toner image formed on a photoconductive drum is primarily transferred at a primary transfer position and which secondarily transfers the toner image on a recording medium at a secondary transfer position, and a driving roller for circulating the intermediate transfer belt. The primary transfer position is arranged close to the driving roller.

Abstract: The present invention provides an electrophotographic image forming apparatus capable of forming a high quality image by eliminating an expansion/contraction, displacement in color or nonuniformity of color of the image formed on a transfer member. An image carrier gear for driving an image carrier is driven by a driving means gear at an image carrier driving position and transmits driving force to conveying force transmitting gear at a transfer driving position. The conveying force transmitting gear transmits conveying force to the transfer member. A time during which the image carrier moves from a latent image forming position to a transferring position is made substantially equal to a time during which the image carrier gear moves from an image carrier driving position to a transfer driving position.

Abstract: Color image forming apparatus and method in which a first transfer device transfers color toner images for color images from a latent image carrying body onto an intermediate transfer belt in a primary transfer process, a second transfer device transfers the color toner images from the intermediate transfer belt onto a recording medium, and a cleaning device for removing remaining toner contacts the intermediate transfer belt at specified times during the primary transfer process. The second transfer device also contacts the intermediate transfer belt at specified times during the primary transfer process.

Abstract: To provide a color image forming apparatus that can implement high speed printing and produce high quality images free from displacements caused when color toner images are superimposed one upon another. A color image forming apparatus using an intermediate transfer belt 106. The apparatus is constructed so that a cleaning blade 1191 and a drive roller 115 are arranged so as to confront the intermediate transfer belt 106 in order that a displacement caused when one color toner image is superimposed upon another can be controlled within a single image-recording dot during a primary transfer process. The apparatus is constructed such that la/l<ld.multidot.E.multidot.t/(L0.multidot..mu..multidot.n), where la (m) is the length of the intermediate transfer belt from a drive roller to a cleaning device, l (m) is the total length of the transfer belt, ld (m) is a pitch between dots developed on the latent image carrying body, E (kg/m.sup.

Abstract: A press device comprises a securing member for detachably securing a plate to a body, and a coupling member detachably provided at a part of a driving transmitting portion. The plate, ram, struts and bolster are detachable from the body together.