Patent application number | Description | Published |
20100002266 | COLOR IMAGE FORMING APPARATUS AND CONTROL METHOD OF THE SAME - The detected surface (patch section) of the sheet Ps for detection, the bulkhead plate | 01-07-2010 |
20100061783 | SHEET CONVEYING APPARATUS AND IMAGE FORMING APPARATUS - A sheet conveying apparatus provided with the first pair of rollers and the second pair of rollers which are positioned in the same axis perpendicular to a fixed direction, and convey a sheet in the conveying direction by rotating while nipping the sheet, the first drive section which drives the first pair of rollers and the second drive section which drives the second pair of rollers, the first detection section which detects a skew angle of the sheet against the conveying direction and a position of an edge part of the sheet in a direction perpendicular to the conveying direction before the sheet is conveyed by the pairs of rollers, and the control section which changes at least one of the rotating speeds based on the detected skew angle, and controls a timing to change the rotating speed based on the detected position of an edge part. | 03-11-2010 |
20110008086 | IMAGE FORMING APPARATUS, CLEAR LAYER FORMING APPARATUS, AND IMAGE FORMING SYSTEM - While having an image forming section which transfers a toner image according to image data onto a recording sheet, a first fixing section which fixes the toner image on the recording sheet with heat of the first fixing roller which rotates on the recording sheet, a clear layer forming section which forms a clear layer on the toner image which the first fixing section has fixed, a second fixing section which fixes the clear layer on the recording sheet with heat of the second fixing roller which rotates on the recording sheet and a control section which controls each part, the control section controls the clear layer forming section to increase the thickness of the clear layer in the recording sheet area corresponding to the fixed area during the second revolution of the first fixing roller on the recording sheet, compared with the first revolution thereof. | 01-13-2011 |
Patent application number | Description | Published |
20080285992 | Image forming apparatus - An image forming apparatus includes a photoreceptor member; a LED head that includes a plurality of light emitting diodes arrayed in a line along a rotating axial direction of said photoreceptor member and that is modulated in response to image signals, so as to expose said photoreceptor member while said photoreceptor member is rotating; a deviation detecting sensor to detect deviations on a circumferential surface of said photoreceptor member; a filter to extract low frequency components including a rotational frequency component of said photoreceptor member from deviation signals detected by said deviation detecting sensor, so as to acquire deviation information with respect to said circumferential surface of said photoreceptor member; a driving section to move said LED head back and forth against said circumferential surface of said photoreceptor member; and a position controlling section to control said driving section, based on said deviation information acquired by said filter, so as to keep a distance between said LED head and said circumferential surface of said photoreceptor member constant. | 11-20-2008 |
20110129253 | IMAGE FORMING APPARATUS, IMAGE FIXING DEVICE AND IMAGE FORMING SYSTEM EQUIPPED THEREWITH - An image forming apparatus includes: an image forming section which transfers a toner image in accordance with image data onto a recording sheet; a first fixing device having a first fixing roller, which fixes the toner image onto the recording sheet with heat; a second fixing device having a second fixing roller, which further applies heat to the recording sheet that has been fixed by the first fixing device; a second fixing roller surface roughness prevention mechanism which prevents a roughness on a surface of the second fixing roller that has been generated due to side ends of the recording sheet being brought into contact with the surface of the second fixing roller; and a controller which controls the image forming section, the first and second fixing devices and the second fixing roller surface roughness prevention mechanism. | 06-02-2011 |
20110135324 | BELT DRIVE APPARATUS AND IMAGE FORMING APPARATUS - A belt drive apparatus, including, an endless belt to be laid across in a tensioned condition between supporting rollers and to travel being in pressure contact with or being separated from a body to receive the pressure contact, a pressure contact/separating state detection section to detect whether the endless belt is in the pressure contact with the body or separated therefrom, a belt position detection section to detect a position of the endless belt in a width direction thereof, a belt abnormality judging section to judge whether the endless belt is in an abnormal position based on a detection result obtained by the belt position detection section and one of judgment values which are set correspondingly to the pressure contact/separating state of the endless belt, and a belt drive control section to control a drive of the endless belt. | 06-09-2011 |
20110188872 | FIXING DEVICE AND IMAGE FORMING APPARATUS - Disclosed is a fixing device including a fixing belt to fix a toner image formed on a paper onto the paper, a driving unit to make the fixing belt reciprocate in a direction perpendicular to a feeding direction of the paper when fixing the toner image onto the paper and a detecting unit to detect a position of the fixing belt in the perpendicular direction, and a control target value of the fixing belt is changed in accordance with the position of the fixing belt in the perpendicular direction detected by the detecting unit, and the fixing belt is made to reciprocate by the driving unit based on the changed control target value. | 08-04-2011 |
20110194860 | IMAGE FORMING APPARATUS - When an input image is to be formed on a sheet conveyed to a transfer roller, the exposure section is controlled and deviation correction is performed to offset the image forming position across the width of the sheet in response to the result of detection by a deviation sensor. By contrast, when pattern images are to be formed on a sheet in response to the instruction of the main control section, the image forming control section does not perform deviation correction in the process of forming a pattern image. | 08-11-2011 |
20120251150 | IMAGE FORMING APPARATUS - An image formation control section sets a secondary transfer section in the pressed state in the case of execution of a main scanning correction processing as color registration correction, and sets the secondary transfer section in the separated state in the case of execution of a sub-scanning correction processing, an entire lateral magnification correction processing, a partial lateral magnification correction processing, or a skew correction processing, which is the correction of the image position for components other than the main scanning direction as color registration correction so as to prevent the situation where the correction accuracy of the image position with respect to the main scanning direction decreases and to prevent a decrease in print quality due to a residual image of a registration correction processing. | 10-04-2012 |