By Inspection Of Copied Image Patents (Class 399/15)
  • Patent number: 10671005
    Abstract: A detecting apparatus includes: a light emitting element which emits light toward a detection material; a light receiving element which receives reflected light from the detection material; and an apparatus main body having an opening/closing member which opens and closes an opening through which light emitted from the light emitting element and reflected light from the detection material pass through, the apparatus main body being capable of moving between a first position where the apparatus main body comes into contact with the detection material and a second position where the apparatus main body separates from the detection material, and the opening/closing member being configured to open when the apparatus main body moves to the first position and to close when the apparatus main body moves to the second position.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: June 2, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoyuki Iwakoshi, Satoshi Tsuda
  • Patent number: 10638017
    Abstract: An image forming apparatus includes a print mechanism, an obtaining unit that obtains measurement information of gradation characteristics of the print mechanism for a specific color material, and a generating unit that generates correction information for a print density of the specific color material in accordance with the measurement information. The correction information specifies that a corrected density with respect to an input density increases monotonically in a range of densities from a correction start density to a maximum density, and the correction start density is determined in accordance with a density where gradation starts to attenuate in the measurement information.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: April 28, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Shinya Takaishi
  • Patent number: 10627740
    Abstract: An image processing apparatus includes an image forming unit of an electrophotographic method, a detection processing unit, and a determination processing unit. The detection processing unit detects a streaky image along a sub-scanning direction from a first image and a second image among images indicated by image data. The first image has a print density equal to or more than a predetermined reference print-density value, and the second image has a print density less than the reference print-density value. The determination processing unit determines a cause of abnormality in the image forming unit based on a detection result of the streaky image by the detection processing unit for each of the first image and the second image.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: April 21, 2020
    Assignee: Kyocera Document Solutions Inc.
    Inventor: Ayumi Nakano
  • Patent number: 10620578
    Abstract: An image forming apparatus includes an image forming device to form an image on an image bearer and circuitry configured to accept, from a user, an input of a density level selected from a plurality of different density levels and control an image forming condition under which the image forming device forms the image. The circuitry is configured to correct density unevenness of the image formed on the image bearer by the image forming device and correct the density unevenness of the image at the density level accepted. The density unevenness is unevenness appearing in a main scanning direction orthogonal to a direction of conveyance of the image bearer during image formation.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: April 14, 2020
    Assignee: Ricoh Compnay, Ltd.
    Inventors: Kohhei Sakurada, Katsuya Akiba, Yasuhito Shinchi, Shinichi Akatsu, Tetsuya Muto, Hiroki Yamamura
  • Patent number: 10616447
    Abstract: A color management system acquires first color data for a color patch of a test pattern printed by a first image forming device on a recto side of a sheet, acquires second color data for the color patch in the test pattern printed by the first image forming device; and acquires third color data for a corresponding color patch in the test pattern printed by a second image forming device on a recto side of a sheet which has passed through the first image forming device. The system applies a correction to the third color data, which is a function of a difference between the first color data and the second color data and which may also be a function of a difference between the second color data and the third color data.
    Type: Grant
    Filed: January 14, 2019
    Date of Patent: April 7, 2020
    Assignee: XEROX CORPORATION
    Inventors: Stuart A. Schweid, Michael B. Monahan
  • Patent number: 10571842
    Abstract: An image forming system includes: a density detecting section that detects the density of a toner image formed on an image bearing member by an image forming section, the density being detected as an output image density; a hardware processor which performs; tone correction in accordance with input-output characteristics data indicating the relationship between an input image density and an output image density, the input image density being the image density of a tone component included in the input image data, the output image density being detected by the density detecting section in accordance with the tone component; determining whether there is a missing tone component in the input image data; and complementing the input-output characteristics data corresponding to a missing tone component, when it is determined that there is the missing tone component.
    Type: Grant
    Filed: January 3, 2019
    Date of Patent: February 25, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventors: Katsuya Toyofuku, Daiki Yamanaka, Toru Yamaguchi
  • Patent number: 10514646
    Abstract: An image forming apparatus includes a latent image bearer, a latent image writing device, a developing device, a conveyance unit to convey a recording medium, a transfer device, a length data acquisition unit to obtain a length of the recording medium in a conveyance direction of the recording medium, an image forming processor to form a test pattern, and a light quantity correction calculator that acquires image density data of the test pattern and calculates a light quantity correction value to correct a light quantity. The image forming processor sets a position of the test pattern on the recording medium in the conveyance direction of the recording medium and a length of the test pattern in the conveyance direction of the recording medium based on the length of the recording medium in the conveyance direction of the recording medium obtained by the length data acquisition unit.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: December 24, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Susumu Narita, Yoshinobu Sakaue, Ryo Sato, Koichi Murota, Masashi Suzuki, Takuma Nishio, Hiroaki Nishina
  • Patent number: 10498929
    Abstract: In a case where a first mode, in which a reader reads test patterns while sheets are fed to the reader by a document feeder, is executed, an image forming apparatus forms a first test pattern on a first sheet and a second test pattern on a second sheet before the first test pattern on the first sheet placed on an original tray of the document feeder is read by the reader. In a case where a second mode, in which the reader reads the test patterns on the sheets without feeding the sheets by the document feeder is executed, the apparatus forms the second test pattern after a reading of the first test pattern on the first sheet is started by the reader.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: December 3, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiroshi Tomii
  • Patent number: 10474083
    Abstract: An image forming apparatus includes a causal member identifying section, and a judgement section. The causal member identifying section identifies the causal member as a cause of the periodic unevenness based on the period of the periodic unevenness which has been detected by the periodic unevenness detector. The judgement section judges whether or not the periodic unevenness is transient based on the information of the causal member identified by the causal member identifying section, the information of at least one of a resting time in which the image forming apparatus has been left inoperative, an operating time of the causal member, and the image forming condition for image formation, and the information of a temperature and a humidity inside the image forming apparatus.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: November 12, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventor: Daisuke Murakami
  • Patent number: 10477035
    Abstract: An image reading apparatus includes: a conveyor that conveys paper on which an image is formed along a conveyance path; a first guide member including a first opening on a reference surface opposed to the conveyance path that guides the conveyed paper; a first opposing member that arranges the image on the paper in a colorimetric range set in the first opening on the reference surface by pressing the reference surface via the paper to allow the paper to abut the reference surface; a second opposing member that presses the reference surface by a pressing surface including a calibrating member in a reference color to arrange the calibrating member in the colorimetric range; and a colorimeter arranged on a side opposite to the conveyance path across the first guide member that performs colorimetry on the image on the paper and the calibrating member arranged in the colorimetric range.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: November 12, 2019
    Assignee: Konica Minolta, Inc.
    Inventor: Kenji Kawatsu
  • Patent number: 10416590
    Abstract: An image forming apparatus includes a conveyance unit, an irradiation unit, an image capturing unit configured to capture a plurality of times the light radiated by the irradiation unit and reflected on the recording material as surface images, an image formation unit, and a control unit, wherein the conveyance unit accelerates or decelerates a conveyance speed of the recording material in at least a part of an image capturing period during which the image capturing unit captures the surface images the plurality of times, and wherein the control unit obtains a feature quantity from a plurality of surface images captured by the image capturing unit and controls the image forming condition based on the obtained feature quantity and a threshold value set according to the conveyance speed of the recording material in the image capturing period.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: September 17, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomohiro Hashimoto, Tsutomu Ishida, Masafumi Monde
  • Patent number: 10416601
    Abstract: A method of adjusting an imaging apparatus comprises printing a set of test patches, the set of test patches comprising a solid color patch, a grey level patch and a substrate patch. The optical densities of the set of test patches are determined. The method comprises simultaneously correcting a solid optical density value (Solid OD), relating to the solid color patch and an associated grey level (LUT) value relating to the grey level patch.
    Type: Grant
    Filed: January 14, 2016
    Date of Patent: September 17, 2019
    Assignee: HP Indigo B.V.
    Inventors: Nir Guttman, Gregory Braverman, Ran Waidman
  • Patent number: 10391785
    Abstract: A method for detecting and compensating for defective printing nozzles in an inkjet printing machine by using a computer, includes shrinking the height of a digitally available image to the image height of a print control strip by using the computer while the image width remains uninfluenced, printing the shrunk digital image onto a printing substrate, recording the printed shrunk digital image by using at least one image sensor, comparing the recorded image with the shrunk digital image by using the computer, detecting defective printing nozzles for the digital image by using the computer based on the comparison and compensating for the detected defective printing nozzles. The digital image is printed onto the following printing substrate by using defective printing nozzle compensation.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: August 27, 2019
    Assignee: Heidelberger Druckmaschinen AG
    Inventors: Ilias Trachanas, Axel Hauck
  • Patent number: 10386767
    Abstract: An image forming apparatus forms a first image by adjusting a photosensitive member potential to a first charging potential and adjusting a developing potential to a first developing potential, and forms a second image by adjusting the member potential to a second charging potential and adjusting the developing potential to a second developing potential, but not causing an exposure unit to expose a photosensitive member, and forms a third image by adjusting the developing potential to a third developing potential, but not causing a charging unit to charge the member and not causing the exposure unit to expose the member. The apparatus detects a streak image based on read data of the first, second and third images, and read data corresponding to a non-image region of the test sheet.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: August 20, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiroshi Tomii
  • Patent number: 10379482
    Abstract: An image forming method for an image forming system that includes an image former that performs both side printing for one sheet and a sheet feeding apparatus and a tray (sheet feeder) that stores a sheet to be fed to the image former, includes detecting a state change of the sheet feeder; and executing adjustment for a formation position of an image to be subjected to both side printing in a case where a state change of the sheet feeder has been detected.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: August 13, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventor: Hiroki Hidaka
  • Patent number: 10379455
    Abstract: An image forming apparatus includes: a photoconductor; an optical writer to write a latent image on the photoconductor; an image data generator to generate image data of at least one of text and image and of a correction pattern; a light emission controller to control a light source of the optical writer; a developing device to develop the latent image into a toner image; a transfer device to transfer the toner image onto a recording medium; a fixing device to fix the toner image thereon; a detector to detect the toner image of the correction pattern formed according to the image data; and a writing position controller to control when the light source emits light based on the toner image detected. The correction pattern is formed at each of four corners inside a margin of the recording medium, and includes two edges in each of main scanning and sub-scanning directions.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: August 13, 2019
    Assignee: Ricoh Company, Ltd.
    Inventor: Katsuhiko Maeda
  • Patent number: 10338511
    Abstract: A reading apparatus includes: a reader that reads an image formed on a sheet; an opposed reading member provided opposite to the reader; a first feeding path that feeds a sheet on an upstream of the reader in a sheet feeding direction; a second feeding path that is continuous to the first feeding path and feeds a sheet between the reader and the opposed reading member; a pair of feeding rollers that feeds a sheet on the first feeding path to the second feeding path; a guide member that guides a sheet fed from the first feeding path to the second feeding path; and a roller that is arranged on the second feeding path and is rotatably driven, wherein the first feeding path and the second feeding path form a feeding path bent, a downstream end of the guide member is positioned in a first region.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: July 2, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventor: Kenji Kawatsu
  • Patent number: 10324397
    Abstract: An image forming apparatus includes a photoconductor drum, a latent-image forming device, a developing device, a density detecting device, and a processing device. The density detecting device is configured to detect densities at a plurality of positions in a main-scanning direction on a developed image. The processing device is configured to acquire at least two light-amount correction tables respectively associated with at least two positions of the plurality of positions in the main-scanning direction on the developed image, the light-amount correction tables being for reducing density variations in a sub-scanning direction at the at least two positions, and correct, for each scan, a set point for setting an amount of light of a light source based on a difference in corresponding correction data between two light-amount correction tables respectively associated with two adjacent positions of the at least two light-amount correction tables.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: June 18, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Muneaki Iwata, Masaaki Ishida, Atsufumi Omori, Hayato Fujita, Takefumi Takizawa
  • Patent number: 10139765
    Abstract: An image forming apparatus includes: an image former that forms an image on a transfer paper sheet; a colorimeter that reads the image; a conveyor that conveys the transfer paper sheet in the image formation and the reading of the image; and a controller that controls the formation of the image, and the reading and the conveyance of the image, wherein when a first conveyance velocity is a velocity at which the transfer paper sheet is conveyed when the image is formed by the image former, a second conveyance velocity is a velocity that is lower than the first conveyance velocity, and a long paper sheet having a longer transfer sheet length than a predetermined threshold value is used as the transfer paper sheet in an adjustment mode, the controller controls the image former and the conveyor, and controls the colorimeter and the conveyor.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: November 27, 2018
    Assignee: Konica Minolta, Inc.
    Inventor: Mitsunori Nakamura
  • Patent number: 9983544
    Abstract: An image reading apparatus includes: a light emission section including a light emitting element, and a light guiding member configured to irradiate a sheet with light emitted from the light emitting element; a reading section configured to read an image formed on the sheet; a heat dissipation section configured to dissipate heat of the light emitting element; and a cooling section configured to cool the heat dissipation section, in which the light emitting element and the heat dissipation section are disposed at positions outside a sheet passing region of the sheet in the width direction.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: May 29, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Akio Kasuga, Akihiko Ooishi
  • Patent number: 9948805
    Abstract: An image reading device having a mark formed on front and back of a sheet by an image forming device, and including a first scanner which reads the mark and a second scanner provided at a downstream side of the first scanner and which reads the mark, includes: a position adjusting unit configured to adjust front and back positions of the mark on the basis of a print position of the mark read by at least one of the first scanner and the second scanner; and a monitoring unit configured to monitor front and back misregistration of the mark on the basis of the front and back positions of the mark adjusted by the position adjusting unit.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: April 17, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventor: Tatsuya Katagiri
  • Patent number: 9811040
    Abstract: An image forming system includes an image forming apparatus which forms an image on a sheet; and a sheet processing apparatus which includes a processing device which performs predetermined processing on a sheet conveyed from the image forming apparatus. The processing device is able to perform the predetermined processing within a certain amount of time after preparation operation to enable the predetermined processing is completed. The sheet processing apparatus includes a processor which controls timing to start the preparation operation so that the preparation operation is completed when a first sheet which is to be a target of the predetermined processing reaches the processing device.
    Type: Grant
    Filed: September 20, 2016
    Date of Patent: November 7, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventor: Ryosuke Muto
  • Patent number: 9727006
    Abstract: An image formation unit that forms an image on a transfer medium, a conveyance unit that conveys the transfer medium, a control unit that controls formation of the image and conveyance of the transfer medium are provided. The control unit has a sheet gap image forming function of forming a predetermined toner image in a sheet gap between the transfer media conveyed by the conveyance unit. When the transfer medium is conveyed, the control unit acquires information of a tilt angle on a conveyance surface of the transfer medium conveyed to the image formation unit, calculates a sheet gap between the transfer media based on the tilt angle, determines whether or not a toner image of a required amount is able to be formed in the sheet gap when performing the sheet gap image forming function, and controls formation of the sheet gap image based on the determination result.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: August 8, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventor: Mikimasa Honma
  • Patent number: 9681012
    Abstract: A color measurement device acquires an image of a relative position calibration chart. The relative position calibration chart includes a calibration figure having a given calibration feature that has a position that is detectable along at least one of a first and a second direction. A color measurement of the relative position calibration chart is performed. Relative position relationship-related information is derived based on the calibration feature in the image of the relative position calibration chart and the calibration feature in the color measurement of the relative position calibration chart. A color of each patch of a number of patches of a color chart is measured at a position corresponding to one of the patches while correcting the position of the patch based on the position relationship-related information.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: June 13, 2017
    Assignee: Konica Minolta, Inc.
    Inventors: Yasushi Goto, Yoshiroh Nagai
  • Patent number: 9377729
    Abstract: An image forming apparatus includes a transport unit that transports a recording medium, a forming unit that forms a toner image including a test pattern, a fixing unit that heats the toner image formed on the recording medium by the forming unit and fixes the toner image on the recording medium, and a controller that controls an amount of heat to be applied to the toner image by the fixing unit, on the basis of a difference between an amount of toner of the test pattern formed by the forming unit and a predetermined reference amount of toner.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: June 28, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Satoshi Nakamura, Yoshihiro Hayashi
  • Patent number: 9213293
    Abstract: An image forming apparatus includes an image forming unit configured to form a measurement image on a sheet, a measurement unit configured to irradiate the measurement image with light and measure light reflected from the measurement image, a white reference plate arranged to be movable to a first position opposed to the measurement unit and a second position separated farther from the measurement unit than the first position, a shielding unit arranged to be movable to a third position that blocks the light with which the measurement unit irradiates the white reference plate and a fourth position that does not block the light, and a control unit configured to control positions of the reference plate and the shielding unit. When the measurement unit measures the white reference plate, the control unit moves the shielding unit to the fourth position and the white reference plate to the first position.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: December 15, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hirotoshi Tajima, Kenichi Hirota
  • Patent number: 9207610
    Abstract: Provided is a control device including a reception unit that receives an instruction of an image quality adjustment from a user, a changing unit that changes, when the instruction is received by the reception unit, an image forming condition in an image forming section from a first condition to a second condition, and an output unit that outputs first information indicating the first condition and second information indicating the second condition in association.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: December 8, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Naoya Yamasaki, Shinichi Tsunoda
  • Patent number: 9141060
    Abstract: An image forming apparatus includes an image forming unit configured to form a measurement image on a sheet along a main scanning direction, a fixing unit configured to fix the measurement image onto the sheet, a first calculation unit configured to cause a measuring unit to output a measured value at a predetermined point of measurement on the measurement image, a feeding unit to rotate the sheet 90 degrees and feed the sheet, the sheet to pass through the fixing unit again, and the measuring unit to output measured values at a plurality of points of measurement, and calculate a first correction coefficient from first and second measured values at the point of measurement, a correction unit configured to correct the measured values with the first correction coefficient, and a second calculation unit configured to calculate a second correction coefficient for correcting an unevenness in the main scanning direction.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: September 22, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Taichi Takemura
  • Patent number: 9116486
    Abstract: A control device includes an acquiring unit acquiring code image data expressing a code image having dots arranged in an array that expresses information; a generating unit extracting the dots from the code image and generating patch image data expressing patch images having the dots orderly arranged in different densities; an image-formation control unit controlling an image forming unit so as to form the patch images based on the patch image data in accordance with a preset image forming condition by using an invisible toner; a measuring unit measuring densities of the patch images; and a changing unit changing the image forming condition if at least one measured density is outside a density range set according to a corresponding dot density based on a correspondence relationship between the measured densities and densities of the dots, so that all of the measured densities are set within the corresponding density ranges.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: August 25, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Yasumitsu Harashima
  • Patent number: 9041974
    Abstract: An image forming apparatus includes an image carrier, an image forming unit to form a multi-gradation image on the image carrier, a density detector to detect density of the multi-gradation image, a gradation characteristic data generator to generate gradation characteristic data, and a gradation corrector to correct image data of the multi-gradation image. The gradation characteristic data generator forms a gradation correction pattern on the image carrier via the image forming unit. The gradation correction pattern is a continuous gradation pattern including a first pattern having gradation levels from a maximum gradation level to a minimum gradation level and a second pattern having gradation levels from the minimum gradation level to the maximum gradation level.
    Type: Grant
    Filed: May 12, 2014
    Date of Patent: May 26, 2015
    Assignee: Ricoh Company, Ltd.
    Inventor: Hideo Muroi
  • Patent number: 9036174
    Abstract: A method and system collects diagnostic data for use in diagnosing existing and potential image quality issues related to a printer. Document cover sheets and/or electronic versions of the cover sheets are routinely collected, even when there has been no reported image quality issue, to preserve a historical record of the output of the printer over an extended time period. The historical record of the images on the routinely collected cover sheets and/or electronic versions of the cover sheets include data useful in diagnosing existing and potential image quality issues related to substantive pages of the documents processed by the printer.
    Type: Grant
    Filed: October 19, 2011
    Date of Patent: May 19, 2015
    Assignee: Palo Alto Research Center Incorporated
    Inventors: John Hanley, Robert R. Price, David Garcia
  • Publication number: 20150117875
    Abstract: An image forming apparatus includes an image forming unit and a controller. The image forming unit forms an image on each medium with a metallic toner. The controller controls the image forming unit such that, in the formation of an image on each medium of plural media different in reflectance, the metallic toner has a toner weight according to the medium.
    Type: Application
    Filed: July 17, 2014
    Publication date: April 30, 2015
    Inventors: Masahiko KUBO, Jun KOYATSU, Keiichi OKADA, Yosuke TASHIRO
  • Patent number: 9020371
    Abstract: An embodiment of this disclosure involves printing color outputs on sheets, reading the color outputs and adjusting a calibration parameter.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: April 28, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Gal Amit, Ran Waidman, Shlomo Harush
  • Publication number: 20150110505
    Abstract: An image forming apparatus includes an image forming unit that forms an image on a recording material; a cause ascertaining unit that ascertains a cause of a streaked image that is generated in the image that is formed on the recording material by the image forming unit; and an outputting unit that outputs information regarding the cause ascertained by the cause ascertaining unit.
    Type: Application
    Filed: May 7, 2014
    Publication date: April 23, 2015
    Applicant: FUJI XEROX CO., LTD.
    Inventor: Nobukazu TAKAHASHI
  • Publication number: 20150104201
    Abstract: An offset image that can occur at a time when reading images printed on both sides of a sheet is automatically removed by a simple operation.
    Type: Application
    Filed: October 8, 2014
    Publication date: April 16, 2015
    Inventor: Toru Takahashi
  • Patent number: 9002216
    Abstract: An image forming apparatus, includes an image forming unit configured to form a reference pattern and a test pattern on a sheet, a measurement unit configured to detect the reference pattern formed on the sheet and to measure the test pattern formed on the sheet, and a control unit configured to control a measurement timing of the test pattern by the measurement unit according to a detection interval between two reference patterns detected by the measurement unit.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: April 7, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: So Matsumoto, Kenji Suzuki, Kenichi Hirota
  • Patent number: 8995848
    Abstract: Disclosed is an image forming apparatus including: an image forming unit to form an image on paper fed from the selected feed tray; a density sensor to measure a density of the image formed on the paper; and a control unit to control execution of an output paper density adjustment in accordance with a result obtained by forming a test image on the paper by using the image forming unit and by measuring the density of the test image formed on the paper by using the density sensor, wherein the control unit executes the output paper density adjustment by changing the feed tray for feeding the paper, from the feed tray designated in a print job to the substitute feed tray at a predetermined timing while the print job is executed, regardless of the paper setting information related to the substitute feed tray.
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: March 31, 2015
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventor: Ken Miyazaki
  • Patent number: 8977143
    Abstract: An image forming apparatus forms a pattern image on a first printing medium and creates a first image processing condition for adjusting a tone characteristic based on a first luminance value. When performing the calibration using a second printing medium different from the first printing medium, the apparatus corrects, based on a luminance value of a background region of the second printing medium, a second luminance value output in accordance with light reflected by the second printing medium, and creates the first image processing condition based on the corrected second luminance value.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: March 10, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Nobuhiko Zaima
  • Publication number: 20150063835
    Abstract: An image forming apparatus includes an image forming unit configured to from a measurement image on a recording paper by a color material, a fixing unit configured to fix the measurement image onto the recording paper by heating, a measurement unit configured to measure the measurement image fixed onto the recording paper downstream of the fixing unit in a conveyance direction of the recording paper, and a control unit configured to perform control such that a period of time from when the recording paper passes through the fixing unit until the measurement unit measures color of the measurement image is longer than a period of time from when the recording paper passes through the fixing unit until the measurement unit measures density of the measurement image.
    Type: Application
    Filed: November 10, 2014
    Publication date: March 5, 2015
    Inventor: Taichi Takemura
  • Publication number: 20150055965
    Abstract: An image forming unit forms a plurality of measurement images based on a plurality of process conditions. A measurement unit measures the density of each of the plurality of measurement images. A determination unit uses a first determination mode or a second determination mode. In the first determination mode, a process condition is determined from a first measurement result higher than target density and a second measurement result lower than the target density, from among a plurality of measurement results. In the second determination mode, the process condition is determined from measurement results lower than the target density.
    Type: Application
    Filed: August 6, 2014
    Publication date: February 26, 2015
    Inventor: Makoto SAITO
  • Publication number: 20150055964
    Abstract: In an image forming apparatus, a sensor section which the printed sheets fed from an image forming section pass through or by in a first direction one by one, irradiates each of the passing printed sheets with light elongated in a second direction different, thereby sensing densities of the each of passing printed sheets, on a pixel basis. Further, a control section integrates densities of respectively corresponding line portions in respective non-image areas of sheets of the printed sheets, based on the densities obtained by the sensor section, each of the line portion extending substantially in the first direction and including pixels on substantially a same position in the second direction, thereby obtaining integrated density values, and predicts, based on the obtained integrated density values, that a noise will occur on a printed sheet to be made by the image forming section later on.
    Type: Application
    Filed: July 31, 2014
    Publication date: February 26, 2015
    Applicant: KONICA MINOLTA, INC.
    Inventors: Yoshiyuki TOSO, Hiroyuki MAEDA, Tadayasu SEKIOKA, Naotoshi KAWAI
  • Patent number: 8953187
    Abstract: Systems and methods consistent with some embodiments presented provide methods for print resource management. In some embodiments of methods for print resource management print data comprising PDL data may be parsed to identify reusable resources in the print data. The reusable resources may be converted to a common internal format and stored. In some embodiments, reusable resources may be rendered to obtain a rendered version of the reusable resource, which may be stored. In some embodiments, the stored rendered version or a rendered form of the stored formatted version of the reusable resource may be used in a bitmap image for a page whenever the reusable resource is referenced during the creation of the bitmap image for the page.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: February 10, 2015
    Assignee: Konica Minolta Laboratory U.S.A., Inc.
    Inventors: Darrell Eugene Bellert, Eduard G. Bauboeck
  • Patent number: 8937745
    Abstract: A method for high-speed multi-color printing includes at least one high-resolution sensor array (23), wherein an output of the high-resolution sensor array is transmitted to a controller (19); at least one low-resolution sensor array (24); wherein the controller calculates a correction for stitch; wherein the controller, based on the calculated correction, adjusts a timing of image data provided to individual print elements comprising print stations (12) to aligned an output of the print elements; and wherein the low-resolution sensor array provides full page viewing.
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: January 20, 2015
    Assignee: Eastman Kodak Company
    Inventors: Matthias H. Regelsberger, Stacy M. Munechika, Christopher B. Liston, James A. Katerberg
  • Publication number: 20150003845
    Abstract: An image forming apparatus capable of inspecting printed matter as a recording sheet on which an image including a copy forgery-inhibited pattern has been printed. An image is printed on a sheet based on print image data. Scanned image data is acquired by reading the printed sheet. Reference data is created by excluding image data representative of image portions which cannot be read from the print image data. It is determined whether or not the printed sheet is free from defective printing by comparing the scanned image data and the reference data.
    Type: Application
    Filed: June 27, 2014
    Publication date: January 1, 2015
    Inventor: Yusuke MORISHITA
  • Patent number: 8922854
    Abstract: An image reading device includes a light source, a light receiving unit, a generation unit, a white reference member, a color reference member, and a processing unit. The light source emits light to a recording medium on which an image is formed. The light receiving unit receives light reflected by the recording medium. The generation unit generates a light intensity value from the light received by the light receiving unit. The white reference member is used for color calibration for a white balance. The color reference member is used for color calibration to calibrate a predetermined color. The processing unit derives a correlation formula representing variation in characteristics of the white reference member, based on a light intensity value generated when light is emitted to the color reference member from the light source.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: December 30, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Kenji Hyoki
  • Publication number: 20140376932
    Abstract: The image forming apparatus includes an image forming section that forms a patch image T on a recording material P, a fixing unit that fixes the patch image, a spectral color measurement device that irradiates light onto the patch image T that was fixed by the fixing unit, and measures reflected light from the patch image, a white reference plate disposed facing the spectral color measurement device; and a control unit that controls a density or a chromaticity of an image based on a result obtained by measuring the patch image and a result obtained by measuring the white reference plate by means of the spectral color measurement device. It is thereby possible to improve the color measurement accuracy of a color measurement device.
    Type: Application
    Filed: June 9, 2014
    Publication date: December 25, 2014
    Inventor: Shoichi Koyama
  • Publication number: 20140369702
    Abstract: An image forming apparatus includes a forming unit configured to form a detection patch on a recording material and a detecting unit configured to detect the detection patch on the recording material being conveyed at a first conveying speed. After the detecting unit detects the detection patch, the recording material with the detected detection patch is conveyed at a second conveying speed higher than the first conveying speed.
    Type: Application
    Filed: June 11, 2014
    Publication date: December 18, 2014
    Inventor: Seiji Yokoyama
  • Publication number: 20140369701
    Abstract: A method for calibrating specialty toner, the method includes providing a substrate; depositing an invariant or substantially invariant laydown of a color toner on the substrate; depositing a varying laydown of the specialty toner; fusing the color toner and specialty toner to the substrate; measuring a color response signal of the substrate, color toner, and specialty toner; calculating a color response curve as function of the varying laydown of the specialty toner; comparing the color response curve to a target color response curve; and modifying printing parameters of the specialty toner to set the color response curve equal to or substantially equal to the target color response curve.
    Type: Application
    Filed: June 14, 2013
    Publication date: December 18, 2014
    Inventors: CHUNG-HUI KUO, Michael Wu
  • Patent number: 8913905
    Abstract: An image forming apparatus includes a detection unit configured to irradiate a patch image formed on a recording material with light, and detect light intensities at a plurality of wavelengths in the light reflected from the patch image; and a determination unit configured to determine that a patch image for which the detection unit is detecting light intensities has transitioned from a first patch image to a second patch image, wherein the determination unit is further configured to determine that the patch image for which the detection unit is detecting has transitioned, in a case where a light intensity at a wavelength for identification of a patch image to be identified, has varied by an amount greater than a first threshold corresponding to that wavelength for identification.
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: December 16, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hirotaka Shiomichi, Ryuhei Shoji, Ken Yokoyama
  • Publication number: 20140363177
    Abstract: A set of adjustment pattern images includes first adjustment pattern images and second adjustment pattern images to be formed on a first side and a second side of a recording sheet, respectively, by an image forming apparatus. The set of adjustment pattern images is employed to adjust an image forming position by the image forming apparatus such that an image forming position of the first adjustment pattern images is aligned with an image forming position of the second adjustment pattern images. The set of adjustment pattern images includes at least two first adjustment pattern images that are spaced from each other and at least two second adjustment pattern images that are spaced from each other, and the first adjustment pattern images on the first side and the second adjustment pattern images on the second side are arranged alternately with each other.
    Type: Application
    Filed: June 2, 2014
    Publication date: December 11, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Norio TOMITA, Yoshikazu HARADA, Yuji KUMAGAI, Masaki AMEMIYA