摘要:
A color image forming apparatus includes a density sensor which detects the light reflecting characteristics of an unfixed toner image formed on an image carrier or a transfer material carrier, and a color sensor which detects the light reflecting characteristics of the fixed toner image formed on a transfer material. A test image is formed on the transfer material in accordance with the detection result of the density sensor, and a density control process of controlling image forming conditions is controlled to be executed in accordance with a detection result of detecting the test image by the color sensor.
摘要:
An image forming apparatus includes an image forming unit adapted to form images of a plurality of colors in a manner in which a predetermined pattern of a predetermined color is registered thereon and superimpose those images to form a color image, a controller configured to control the image forming unit so as to form a patch image of each color for density detection, and a detector configured to detect the density of each of the patch images. The controller controls the image forming unit so as to superimpose the predetermined pattern of the predetermined color upon the patch image of a predetermined color and not to superimpose the predetermined pattern of the predetermined color upon the patch images of the other colors.
摘要:
A color image forming apparatus includes a density sensor which detects the light reflecting characteristics of an unfixed toner image formed on an image carrier or a transfer material carrier, and a color sensor which detects the light reflecting characteristics of the fixed toner image formed on a transfer material. A test image is formed on the transfer material in accordance with the detection result of the density sensor, and a density control process of controlling image forming conditions is controlled to be executed in accordance with a detection result of detecting the test image by the color sensor.
摘要:
An image forming apparatus includes an image forming unit adapted to form images of a plurality of colors in a manner in which a predetermined pattern of a predetermined color is registered thereon and superimpose those images to form a color image, a controller configured to control the image forming unit so as to form a patch image of each color for density detection, and a detector configured to detect the density of each of the patch images. The controller controls the image forming unit so as to superimpose the predetermined pattern of the predetermined color upon the patch image of a predetermined color and not to superimpose the predetermined pattern of the predetermined color upon the patch images of the other colors.
摘要:
A structure for a transport path for a recording material within a transfer portion varies between a margin-less print mode and a normal print mode. A necessity of cleaning of a transfer member also varies between both modes. Thus, provided is an image forming apparatus in which the structure of the transfer portion is switched between the normal print and the margin-less print, and the margin-less print cannot be carried out with a structure of the transfer portion for the normal print. This is because, when the so-called margin-less print is carried out with the structure of the transfer portion for the normal print, there is a possibility that an image defect of a print image to be outputted is caused, or a stain of toner on a rear surface of the recording material is caused.
摘要:
A structure for a transport path for a recording material within a transfer portion varies between a margin-less print mode and a normal print mode. A necessity of cleaning of a transfer member also varies between both modes. Thus, provided is an image forming apparatus in which the structure of the transfer portion is switched between the normal print and the margin-less print, and the margin-less print cannot be carried out with a structure of the transfer portion for the normal print. This is because, when the so-called margin-less print is carried out with the structure of the transfer portion for the normal print, there is a possibility that an image defect of a print image to be outputted is caused, or a stain of toner on a rear surface of the recording material is caused.
摘要:
A color image forming apparatus includes a first density detecting unit for detecting a density of a first detection toner image formed on an image bearing member or a transferring material carrying member, and a second density detecting unit for detecting a density of a second detection toner image fixed onto a transferring material, and executes image density control based on a detection result of the first density detecting unit and a detection result of the second density detecting unit. A detecting light application position of the first density detecting unit and a detection light application position of the second density detecting unit are almost equal relative to a perpendicular direction to a transferring material conveying direction. It is thereby possible to shorten time required for density control and to prevent deterioration of density control accuracy caused by a temporal change and a positional change in the density of a detection toner patch.
摘要:
An image forming apparatus includes a first image bearing member for bearing an image, a second image bearing member for bearing an image, an intermediate transfer member, wherein, after a plurality of images are sequentially transferred in a first transfer position and a second transfer position from the first image bearing member and the second image bearing member to the intermediate transfer member, the plurality of images on the intermediate transfer member are transferred to a transfer material, and a detector for detecting a first image for detection and a second image for detection transferred from the first image bearing member and the second image bearing member to the intermediate transfer member, wherein the intensity of the electric field formed in the second transfer position when the first image for detection passes through the second transfer position is smaller (e.g. zero) than the intensity of the electric field formed in the second transfer position when the second image for detection is transferred from the second image bearing member to the intermediate transfer member.
摘要:
An image forming apparatus includes a movable image bearing member, a movable intermediary transfer member, wherein an image on the image bearing member is transferred onto the intermediary transfer member by primary transfer and the image transferred onto the intermediary transfer member is transferred onto a transfer material by secondary transfer, a discriminator for discriminating a kind of the transfer material, and a controller for controlling a moving speed ratio between the image bearing member and the intermediary transfer member on the basis of an output of the discriminator.
摘要:
An image forming apparatus is provided in which, by detecting an image formed on a recording medium, at least one of the density and chromaticity of the image can be properly controlled. The image forming apparatus includes an image forming unit for forming a toner image on an image carrier, a transfer unit for transferring the toner image formed by the image forming unit onto a transfer material in a transfer position, a fusing unit for fusing the toner image transferred by the transfer unit on the transfer material, a feed-direction changing unit for changing over a feed direction of the transfer material so that the transfer material having the toner image fused by the fusing unit is reversed and fed to the transfer position, a detecting unit for detecting, in a predetermined detecting position, the toner image fused on the transfer material by the fusing unit, and a control unit for controlling the image forming unit based on result detected by the detecting unit.