摘要:
An image forming apparatus including a transfer section for transferring a toner image formed on an image bearing member onto a sheet by pressure contact of the sheet against the image bearing member with a transfer member; a cleaning section having a cleaning blade to remove residual toner on the image bearing member; and a control section for controlling a rotation of the image bearing member so as to carry out a return action of a blade configuration which stops or reverses the rotation of the image bearing member, when the rotation amount reaches a predetermined value, wherein the control section additionally carries out the return action when the rotation amount reaches a value smaller than the predetermined value, in a case where a size of a sheet in a current job is larger than a size a sheet having been passed through in a previous job.
摘要:
An image forming apparatus including: an image forming section having a intermediate transfer body to carry a toner image on a photoreceptor and transfer the toner image onto a sheet of paper; a cleaning section for removing residual toner on the intermediate transfer body by bringing a cleaning blade into close contact with the intermediate transfer body; and a control section for controlling a rotation of the intermediate transfer body so as to carry out a return action of a blade configuration which stops or reverses the rotation of the intermediate transfer body, when a rotation amount reaches a predetermined value, wherein the control section carries out the return action when the rotation amount reaches a value smaller than the predetermined value, in a case where a plurality of previous printing jobs is determined to be intermittent printing.
摘要:
An electric charge eliminating device for eliminating electric charge on an image carrying member or on a recording medium carrying member which is incorporated in an image forming apparatus, comprises a needlelike electrode having a plurality of protruding sections which form a plurality of discontinuous discharge points; an insulating holder for holding the needlelike electrode; a discharging power source for applying an electric voltage to the needlelike electrode; and a conductive shielding member arranged between the needlelike electrode and the image carrying member or the recording medium carrying member.
摘要:
an image forming apparatus sets the optimum transfer bias based on density of some sets of toner patches formed on an image bearing member or an intermediate transfer member. The toner patches are categorized into at least two groups according to their width in the main scanning direction.
摘要:
An image forming apparatus sets the optimum transfer bias based on density of some sets of toner patches formed on an image bearing member or an intermediate transfer member. The toner patches are categorized into at least two groups according to their length in the main scanning direction.
摘要:
An image forming apparatus having plural image carriers, respective chargers, exposure units, color toner developing units, a black toner developing unit, a transfer unit that transfers in the transfer section the color toner images and black toner image onto an intermediate transfer member by the application of a transfer bias from the power supply unit, and a controller that controls the transfer output, an an optical density sensor that detects the optical density of color toner patch images formed on the intermediate transfer member, and a controller transfers the color toner patch images onto the intermediate transfer member while changing the transfer output, detects the optical densities of color toner patch images transferred onto the intermediate transfer member using the optical density sensor, and controls the transfer output to transfer the black toner image based on the detected optical densities of the color toner patch images.
摘要:
An image forming apparatus, comprises an image carrier for carrying a toner image, a charging device for charging the carrier, wherein the charging device includes a discharge member and a grid which is arranged between this discharge member and the image carrier and has at least a surface made of gold; and a discharge product removing device for removing discharge products generated by the charging device from a portion of the image carrier to where the charging device is located to face.
摘要:
This invention relates to an image forming apparatus. The image forming apparatus includes a primary transfer means for bringing one surface of an intermediate transfer body and/or transfer medium into contact with a photosensitive body surface and pressing the surface against the photosensitive body surface to transfer a toner image formed on the photosensitive body surface onto one surface of the intermediate transfer body and/or transfer medium. When a time of passage through the contact transfer area between the photosensitive body and the intermediate transfer body and/or transfer medium in the process of transferring the toner image from the photosensitive body onto the intermediate transfer body and/or transfer medium is T, T1, or T2 sec, the contact angle of the photosensitive body with respect to pure water applied to the photosensitive body surface after a lapse of T, T1, or T2 sec since application of the pure water is larger than that of the intermediate transfer body and/or transfer medium with respect to the pure water after a lapse of the T, T1, or T2 sec.
摘要:
An image forming apparatus having: a transfer section which transfers a toner image onto an intermediate transfer body or a transfer material to form an image thereon; a selection section for selecting one mode among a plurality of modes including a first mode for forming the image by using a plurality of colors including a first color and a second mode for forming the image by using less number of colors including the first color than that of the colors in the first mode; and a control section for controlling the transfer section in order that a transfer rate of a toner image of the first color in the second mode is larger than that of a toner image of the first color in the first mode when toner images are transferred onto the intermediate transfer body or the transfer material by the transfer section.
摘要:
An image forming apparatus, comprising an image carrier to carry toner image formed based on image data, a cleaning blade to remove residual toner on the image carrier by being in contact with the image carrier and a toner storage portion structured to store the residual toner removed by the cleaning blade and so that the image carrier can rub on the residual toner, wherein the toner storage portion is located on an upstream side of a contacting point between the cleaning blade and the image carrier in a moving direction of the image carrier and in a position where the, toner storage portion is not in contact with the cleaning blade.