Patent application number | Description | Published |
20100259772 | RECORDING SHEET SURFACE DETECTION APPARATUS AND IMAGE FORMING APPARATUS - An image forming apparatus for detecting surface conditions of a recording sheet on which an image is formed, includes a light source configured to emit a first light beam and a second light beam, an image capture device configured to capture a first image of a surface of the recording sheet illuminated with the first light beam and a second image of the surface of the recording sheet illuminated with the second light beam. A first straight line including a ray in a center of the first light beam and a second straight line including a ray in a center of the second light beam intersect with each other, when each straight line is projected onto the surface of the recording sheet, and a detection device configured to detect information about the unevenness on the surface of the recording sheet based on the first image and the second image. | 10-14-2010 |
20100309488 | RECORDING MEDIUM IMAGING DEVICE AND IMAGE FORMING APPARATUS - There is provided a recording medium imaging device capable of properly selecting pixels used for determining the kind of the recording medium from the captured surface image to remove pixels from which the surface property of the recording medium cannot be properly determined because the pixels extremely high in light quantity are affected by some sort of dirt or scratches in determining the kind of a recording medium. This allows the determination of kind of the recording medium based on the normally captured surface image to reduce the decrease in accuracy in determining the kind of the recording medium. | 12-09-2010 |
20110142461 | ULTRASONIC WAVE CONTROL DEVICE AND RECORDING MATERIAL DETERMINING DEVICE - In a device for detecting a basis weight of a recording material, an initial measurement is performed by using ultrasonic waves that have passed through the recording material, and the recording material is roughly classified first. By changing the number of pulses of the driving signal in accordance with a result of the initial measurement, the basis weight of the recording material can be detected by using ultrasonic waves suitable for the recording material, so that the detection accuracy of the basis weight of the recording material can be increased. | 06-16-2011 |
20110217052 | COLOR IMAGE FORMING APPARATUS HAVING FUNCTION OF OBTAINING COLOR INFORMATION OF PATCH - An image forming apparatus uses the difference in time taken for each patch to reach a color sensor, which occurs upon reversing the conveyance direction of a printing material. Due to this difference in time, the temperature of the printing material in detection by the color sensor differs among the respective patches. The error of a colorimetric value due to thermochromism is reduced by placing a patch with a colorimetric value which has a low temperature dependence so as to be detected earlier, and a patch with a colorimetric value which has a high temperature dependence so as to be detected later. | 09-08-2011 |
20120020685 | RECORDING MATERIAL DETERMINATION DEVICE AND IMAGE FORMING APPARATUS - A recording material determination device includes an ultrasonic wave transmission unit configured to transmit an ultrasonic wave to a recording material based on a driving signal, an ultrasonic wave receiving unit configured to receive the ultrasonic wave, a light exposure unit configured to expose the recording material to light, a light receiving unit configured to receive light, an amplification unit configured to amplify an ultrasonic wave received by the ultrasonic wave receiving unit to a first output value, and after the amplification unit amplifies the ultrasonic wave received by the ultrasonic wave receiving unit to the first output value, a control unit performs control so as to obtain the second output value by the light exposure unit and the light receiving unit during a period of time after the amplification of the ultrasonic wave is stopped and before the next ultrasonic wave comes to be transmittable. | 01-26-2012 |
20120106994 | RECORDING-MATERIAL IDENTIFYING APPARATUS AND IMAGE FORMING APPARATUS - By providing a step in a pressing member for pressing a recording material P to a reading surface of an image-pickup unit, surface images in a tight contact area and a non-tight-contact area are picked up. By identifying the type of the recording material P based on the two surface images, the accuracy of identifying the recording material is improved without using a plurality of sensors. | 05-03-2012 |
20120148275 | RECORDING MATERIAL DETECTION APPARATUS AND IMAGE FORMING APPARATUS - A recording material detection apparatus having a detecting device configured to detect a surface state of a recording material on the basis of reflected light from a surface of the recording material includes a reference surface to be irradiated with light from a light source, the detecting device includes a light-shielding portion configured to control conditions for detecting information relating to the surface state of the recording material on the basis of the reflected surface from the reference surface, and cover a portion of the reference panel other than the reference surface so as to prevent the light from the light source from being reflected from the portion of the reference panel other than the reference surface and being received by the light-receiving unit. | 06-14-2012 |
20120327405 | COLOR MEASUREMENT DEVICE AND IMAGE FORMING APPARATUS - The color measurement device and an image forming apparatus using the same includes a light source for irradiating a color measurement object with white light; a diffraction grating for dispersing the light reflected from the color measurement object; and a line sensor formed of multiple pixels that generate an electric signal corresponding to the intensity of the light dispersed by the diffraction grating, wherein the light source includes a light-emitting diode having a peak value of emission intensity in a wavelength zone of 380 nm to 420 nm, and a plural types of fluorescent members each having a peak value of fluorescence intensity in a wavelength zone of 420 nm to 730 nm. | 12-27-2012 |
20130016352 | SPECTRAL COLOR SENSOR AND IMAGE FORMING APPARATUSAANM Kita; HiroshiAACI Mishima-shiAACO JPAAGP Kita; Hiroshi Mishima-shi JPAANM Ebihara; Shun-ichiAACI Suntou-gunAACO JPAAGP Ebihara; Shun-ichi Suntou-gun JP - A spectral color sensor including a spectroscopic unit that disperses reflected light from a measurement target, and a light detection element that detects the dispersed light from the reflected light, comprises: a storage unit that stores a correspondence relationship between a pre-measured wavelength of the dispersed light projected on the light detection element and a projection position, as well as a stray light component; a first correction unit that, based on a measurement result when a color is measured, corrects the correspondence relationship between the wavelength of the dispersed light projected on the light detection element and the projection position stored in the storage unit; and a second correction unit that carry out wavelength correction on the stray light component stored in the storage unit using the corrected correspondence relationship between the wavelength and the projection position. | 01-17-2013 |
20130038867 | SPECTROCOLORIMETER AND IMAGE FORMING APPARATUS - A spectrocolorimeter comprises: a calculation unit configured to calculate wavelengths of dispersing light rays respectively received by a plurality of pixels included in a light detection unit using a correspondence relationship between pixels and wavelengths of a plurality of extremal value points in a profile of dispersing light rays detected by the light detection unit upon execution of colorimetry of a reference object to be measured, wherein when the calculation unit calculates the wavelengths of the dispersing light rays respectively received by the plurality of pixels, the calculation unit adjusts a colorimetry condition for respective extremal value points so that signals to be output from pixels corresponding to the plurality of extremal value points have output levels which are not less than a reference and are not saturated. | 02-14-2013 |
20130041602 | RECORDING MATERIAL DETERMINATION DEVICE FOR DETERMINING WHETHER RECORDING MATERIALS ARE DOUBLY FED - A recording material determination device obtains a difference between a peak time, which is a first measurement result when an ultrasonic wave has passed through a recording material, and a peak time, which is a second or subsequent measurement result. The recording material determination device compares the difference with a double feed determination threshold value set based on the difference between the peak times, to precisely determine double feed of the recording materials without being influenced by an environment and the kind of the recording material. | 02-14-2013 |
20130114968 | IMAGE FORMING APPARATUS - An image forming apparatus includes: an image bearing member; a rotatable transfer member; a conveying portion for conveying a recording material; a controller for controlling an operation for forming a test image of a toner on the image bearing member in an interval region between consecutive output images of the toner; and a detecting portion for detecting the test image. The controller permits the formation of the test image, when next one of the consecutive output images is to be transferred onto a first side of the recording material, and the controller is capable of preventing the formation of the test image, when next one of the consecutive output images is to be transferred onto a second side of the recording material. | 05-09-2013 |
20130135424 | RECORDING MEDIUM IMAGING DEVICE AND IMAGE FORMING APPARATUS - There is provided a recording medium imaging device capable of properly selecting pixels used for determining the kind of the recording medium from the captured surface image to remove pixels from which the surface property of the recording medium cannot be properly determined because the pixels extremely high in light quantity are affected by some sort of dirt or scratches in determining the kind of a recording medium. This allows the determination of kind of the recording medium based on the normally captured surface image to reduce the decrease in accuracy in determining the kind of the recording medium. | 05-30-2013 |
20130136473 | IMAGE FORMING APPARATUS - An image forming apparatus includes an intermediary transfer member for carrying an image; a transferring device for transferring the image from the intermediary transfer member onto a sheet; a device for forming a toner patch for a density adjustment between adjacent sheets, in an area corresponding to between adjacent ones of sheets on the intermediary transfer member; a detector for detecting density of the patch; and a sheet interval density adjusting device for adjusting in real time a density/tone-gradation property of the image on the basis of a detection result of the density detector. The patch includes a density detection area, and an outer marginal portion having a density lower than that of the density detection area. The patch forming device changes at least one of a patch image density of the density detection area, a size of the marginal portion and a density of the marginal portion. | 05-30-2013 |
20140037310 | RECORDING SHEET SURFACE DETECTION APPARATUS AND IMAGE FORMING APPARATUS - An image forming apparatus for detecting surface conditions of a recording sheet on which an image is formed, includes a light source configured to emit a first light beam and a second light beam, an image capture device configured to capture a first image of a surface of the recording sheet illuminated with the first light beam and a second image of the surface of the recording sheet illuminated with the second light beam. A first straight line including a ray in a center of the first light beam and a second straight line including a ray in a center of the second light beam intersect with each other, when each straight line is projected onto the surface of the recording sheet, and a detection device configured to detect information about the unevenness on the surface of the recording sheet based on the first image and the second image. | 02-06-2014 |
20140044444 | COLOR IMAGE FORMING APPARATUS HAVING FUNCTION OF OBTAINING COLOR INFORMATION OF PATCH - An image forming apparatus uses the difference in time taken for each patch to reach a color sensor, which occurs upon reversing the conveyance direction of a printing material. Due to this difference in time, the temperature of the printing material in detection by the color sensor differs among the respective patches. The error of a colorimetric value due to thermochromism is reduced by placing a patch with a colorimetric value which has a low temperature dependence so as to be detected earlier, and a patch with a colorimetric value which has a high temperature dependence so as to be detected later. | 02-13-2014 |
20140093260 | RECORDING MATERIAL DETECTION APPARATUS AND IMAGE FORMING APPARATUS - A recording material detection apparatus having a detecting device configured to detect a surface state of a recording material on the basis of reflected light from a surface of the recording material includes a reference surface to be irradiated with light from a light source, the detecting device includes a light-shielding portion configured to control conditions for detecting information relating to the surface state of the recording material on the basis of the reflected surface from the reference surface, and cover a portion of the reference panel other than the reference surface so as to prevent the light from the light source from being reflected from the portion of the reference panel other than the reference surface and being received by the light-receiving unit. | 04-03-2014 |
20140376936 | RECORDING-MATERIAL IDENTIFYING APPARATUS AND IMAGE FORMING APPARATUS - By providing a step in a pressing member for pressing a recording material P to a reading surface of an image-pickup unit, surface images in a tight contact area and a non-tight-contact area are picked up. By identifying the type of the recording material P based on the two surface images, the accuracy of identifying the recording material is improved without using a plurality of sensors. | 12-25-2014 |
20150078772 | RECORDING MATERIAL DETECTION APPARATUS AND IMAGE FORMING APPARATUS - A recording material detection apparatus having a detecting device configured to detect a surface state of a recording material on the basis of reflected light from a surface of the recording material includes a reference surface to be irradiated with light from a light source, the detecting device includes a light-shielding portion configured to control conditions for detecting information relating to the surface state of the recording material on the basis of the reflected surface from the reference surface, and cover a portion of the reference panel other than the reference surface so as to prevent the light from the light source from being reflected from the portion of the reference panel other than the reference surface and being received by the light-receiving unit. | 03-19-2015 |