Patents by Inventor Kenji Izumiya

Kenji Izumiya has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20150063850
    Abstract: A fixing apparatus includes an upper pressure roller, a fixing belt, a lower pressure roller which cooperates with the upper pressure roller and the fixing belt for forming a fixing nip portion which holds and conveys a sheet with a toner image therebetween; a drive motor which rotates the lower pressure roller; a plurality of motors each of which is capable of generating a braking force in the direction to hinder rotation of the upper pressure roller and an assist force in the direction to assist rotation of the upper pressure roller; a torque generation unit which generate an effective braking force in the direction to hinder rotation of the fixing side member as a combination of the braking and assist forces; and a control unit which switches the motor used to generate the braking force among the plurality of motors in accordance with a predetermined condition.
    Type: Application
    Filed: August 27, 2014
    Publication date: March 5, 2015
    Applicant: KONICA MINOLTA, INC.
    Inventors: Takeshi TAMADA, Satoshi OGATA, Kenji IZUMIYA, Hiroshi OYAMA, Masayuki WATANABE
  • Patent number: 8955839
    Abstract: A paper feed apparatus is capable of correcting the skew of a sheet irrespective of a differential conveyance distance. The paper feed apparatus is provided with a first large volume paper feed apparatus 100A having a control unit 130 which performs first correction control to correct the skew of a sheet by controlling a first conveyance unit 110 and forming a loop of the sheet P before a paper stop rollers 110d, and also performs second correction control to correct the skew of a sheet by controlling a second conveyance unit 120 and forming a loop of the sheet before a paper stop rollers 110d. In this case, the control unit 130 controls the first conveyance unit 110 and the second conveyance unit 120 in order that the skew correcting ability of the second correction control becomes greater than the skew correcting ability of the first correction control.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: February 17, 2015
    Assignee: Konica Minolta, Inc.
    Inventors: Hiroshi Oyama, Kenji Izumiya, Kiyoto Kojima, Atsushi Takahashi
  • Publication number: 20140363185
    Abstract: An image forming apparatus comprises a drive motor configured to rotate the lower pressure roller, a torque generation unit for generating a breaking force in the direction to hinder rotation of a fixing belt in order to adjust the differential speed between the surface speed of the fixing belt and the surface speed of the lower pressure roller 64, and a control unit for adjusting the breaking force generated by the torque generation unit. The control unit adjusts the breaking force generated by the torque generation unit to decrease if the rotational torque of the drive motor is larger than a predetermined target torque, and increase if the rotational torque of the drive motor is smaller than the predetermined target torque.
    Type: Application
    Filed: June 3, 2014
    Publication date: December 11, 2014
    Applicant: KONICA MINOLTA, INC.
    Inventors: Takeshi TAMADA, Kenji IZUMIYA, Satoshi OGATA, Masahito TAKANO
  • Patent number: 8783683
    Abstract: An image forming apparatus acquires sheet information indicating paper weight or the like of a transported sheet of paper. The apparatus also has a control portion and shifts a reference position which has been previously set to a direction orthogonal to a transporting direction of the sheet of paper based on the paper weight or the like of the transported sheet of paper. A deviation sensor detects a deviation of the sheet of paper with regard to the shifted reference position along the direction orthogonal to the transporting direction of the sheet of paper. A sheet shift portion shifts the sheet of paper to the shifted reference position based on the deviation detected by the deviation sensor.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: July 22, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Kenji Izumiya, Hiroshi Oyama, Yumiko Izumiya
  • Patent number: 8764003
    Abstract: When conveying an envelope, a posture of the envelope is corrected by hitting a closed portion of the envelope, which is opposite side of an opened portion of the envelope, against a nip portion between upper and lower rollers of the pre-registration rollers and the envelope is then conveyed with the envelope being nipped by the upper and lower rollers of the pre-registration rollers. The upper and lower rollers of the pre-registration rollers nip the envelope to remove air from the envelope. When setting an envelope mode to control a conveying speed of the envelope based on a coverage rate of an image to be formed on the envelope, the conveying speed of the envelope is controlled by adjusting a rotation speed of the registration rollers based on the coverage rate of the set envelope mode.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: July 1, 2014
    Assignee: Konica Minolta Business Technologies, Icn.
    Inventors: Hiroshi Oyama, Kenji Izumiya, Kiyoto Kojima, Atsushi Takahashi
  • Publication number: 20140138899
    Abstract: A paper feed apparatus is capable of correcting the skew of a sheet irrespective of a differential conveyance distance. The paper feed apparatus is provided with a first Large volume paper feed apparatus 100A having a control unit 130 which performs first correction control to correct the skew of a sheet by controlling a first conveyance unit 110 and forming a loop of the sheet P before a paper stop rollers 110d, and also performs second correction control to correct the skew of a sheet by controlling a second conveyance unit 120 and forming a loop of the sheet before a paper stop rollers 110d. In this case, the control unit 130 controls the first conveyance unit 110 and the second conveyance unit 120 in order that the skew correcting ability of the second correction control becomes greater than the skew correcting ability of the first correction control.
    Type: Application
    Filed: November 19, 2013
    Publication date: May 22, 2014
    Applicant: Konica Minolta , Inc.
    Inventors: Hiroshi OYAMA, Kenji IZUMIYA, Kiyoto KOJIMA, Atsushi TAKAHASHI
  • Patent number: 8611767
    Abstract: Disclosed is an image forming apparatus, which makes it possible to reduce the frequency of image defect occurrences to a level as lower as possible by detecting abnormalities generated with age on the photoreceptor member and/or in the cleaning section, so as to suppress an amount of spoiled paper sheets and material. The image forming apparatus includes: a light source that is disposed at a position located between a cleaning section and a charging section, to emit an inspection light, which is to be irradiated onto a photoreceptor member over a main-scanning direction thereof; a tight-contact type image sensor that has a line image sensor to receive the inspection light reflected from a surface of the photoreceptor member; and a control section to determine a status of a surface of the photoreceptor member, based on a result of analyzing the inspection light receive by the line image sensor.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: December 17, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Kenji Izumiya, Atsushi Takahashi, Hiroshi Oyama, Yumiko Higashi, Katsuyuki Ikuta
  • Publication number: 20130264763
    Abstract: When conveying an envelope, a posture of the envelope is corrected by hitting a closed portion of the envelope, which is opposite side of an opened portion of the envelope, against a nip portion between upper and lower rollers of the pre-registration rollers and the envelope is then conveyed with the envelope being nipped by the upper and lower rollers of the pre-registration, rollers. The upper and lower rollers of the pre-registration rollers nip the envelope to remove air from the envelope. When setting an envelope mode to control a conveying speed of the envelope based on a coverage rate of an image to be formed on the envelope, the conveying speed of the envelope is controlled by adjusting a rotation speed of the registration rollers based on the coverage rate of the set envelope mode.
    Type: Application
    Filed: March 28, 2013
    Publication date: October 10, 2013
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Hiroshi OYAMA, Kenji IZUMIYA, Kiyoto KOJIMA, Atsushi TAKAHASHI
  • Publication number: 20130050718
    Abstract: An image forming apparatus contains a transporting unit for transporting a sheet of paper to an image forming section, a deviation detection sensor which detects a passing position of the transported sheets of paper end outputs passing data of the transported sheets of paper for every sheet of paper, a deviation calculation section which generates deviation storage data for evaluating a condition of a transporting section or a detection section by performing statistical processing on the passing data of the transported sheets of paper, and a discrimination section which discriminates between a case in which there is malfunction in the transporting section and a case in which there is malfunction in the detection section by comparing the deviation storage data with deviation characteristics data for discriminating between the malfunction in the transporting section and the malfunction in the detection section.
    Type: Application
    Filed: August 28, 2012
    Publication date: February 28, 2013
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Atsushi TAKAHASHI, Kenji IZUMIYA, Hiroshi OYAMA, Yumiko IZUMIYA
  • Publication number: 20130032993
    Abstract: An image forming apparatus acquires sheet information indicating paper weight or the like of a transported sheet of paper. The apparatus also has a control portion and shifts a reference position which has been previously set to a direction orthogonal to a transporting direction of the sheet of paper based on the paper weight or the like of the transported sheet of paper. A deviation sensor detects a deviation of the sheet of paper with regard to the shifted reference position along the direction orthogonal to the transporting direction of the sheet of paper. A sheet shift portion shifts the sheet of paper to the shifted reference position based on the deviation detected by the deviation sensor.
    Type: Application
    Filed: July 31, 2012
    Publication date: February 7, 2013
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Kenji Izumiya, Hiroshi Oyama, Yumiko Izumiya
  • Publication number: 20120128378
    Abstract: Disclosed is an image forming apparatus, which makes it possible to reduce the frequency of image defect occurrences to a level as lower as possible by detecting abnormalities generated with age on the photoreceptor member and/or in the cleaning section, so as to suppress an amount of spoiled paper sheets and material. The image forming apparatus includes: a light source that is disposed at a position located between a cleaning section and a charging section, to emit an inspection light, which is to be irradiated onto a photoreceptor member over a main-scanning direction thereof; a tight-contact type image sensor that has a line image sensor to receive the inspection light reflected from a surface of the photoreceptor member; and a control section to determine a status of a surface of the photoreceptor member, based on a result of analyzing the inspection light receive by the line image sensor.
    Type: Application
    Filed: November 15, 2011
    Publication date: May 24, 2012
    Inventors: Kenji IZUMIYA, Atsushi TAKAHASHI, Hiroshi OYAMA, Yumiko HIGASHI, Katsuyuki IKUTA
  • Publication number: 20110203470
    Abstract: Disclosed is an image forming apparatus to form an image on a paper, comprising: a main body section including a housing to house an apparatus to perform processing for the paper, and a control circuit to control the apparatus housed in the housing; and a peripheral apparatus provided separately from the main body section, which includes a hardware module having an electric component, and is connected to the control circuit so that communication therebetween is performed, and which is detachably provided to the housing, wherein a position at which the peripheral apparatus is provided to the housing can be changed, wherein the housing and the peripheral apparatus respectively include a conductive material, and the conductive material of the housing is grounded, and wherein when the peripheral apparatus is provided to the housing, the conductive material of the housing is conductive with the conductive material of the peripheral apparatus.
    Type: Application
    Filed: February 24, 2011
    Publication date: August 25, 2011
    Inventors: Hiroshi OYAMA, Kenji Izumiya, Yumiko Higashi, Hidenori Mine
  • Patent number: 7876342
    Abstract: In an image forming apparatus for forming a color image by superposing component color images, a control device obtains position data representing a forming position of each of plural registration mark images for the component color images with respect to a positional reference value arbitrarily determined, divides the position data into each of a unit reference range representing a range in which one mark image is formed, converts the position data divided for each unit reference range into those based on respective reference values representing the front edge of the unit reference ranges, extracts the position data representing ranges common to the mutually overlapping ranges each of which is represented by a couple of position data corresponding to the rising and falling edges of a passage timing pulse as read position data of the mark image of the component color, and calculates the amounts of positional deviations of the component color images from one another on the basis of the position data extracted.
    Type: Grant
    Filed: September 16, 2008
    Date of Patent: January 25, 2011
    Assignee: Konica Corporation
    Inventors: Eiji Nishikawa, Hiroyuki Maruyama, Hiroyuki Arai, Toshihiro Motoi, Kenji Izumiya, Ryuji Okutomi, Shinobu Kishi, Satoshi Ogata, Kenichi Ozawa, Tadayuki Ueda, Yumiko Higashi
  • Publication number: 20090269089
    Abstract: In an image forming apparatus for forming a color image by superposing component color images, a control device obtains position data representing a forming position of each of plural registration mark images for the component color images with respect to a positional reference value arbitrarily determined, divides the position data into each of a unit reference range representing a range in which one mark image is formed, converts the position data divided for each unit reference range into those based on respective reference values representing the front edge of the unit reference ranges, extracts the position data representing ranges common to the mutually overlapping ranges each of which is represented by a couple of position data corresponding to the rising and falling edges of a passage timing pulse as read position data of the mark image of the component color, and calculates the amounts of positional deviations of the component color images from one another on the basis of the position data extracted.
    Type: Application
    Filed: September 16, 2008
    Publication date: October 29, 2009
    Applicant: KONICA CORPORATION
    Inventors: Eiji NISHIKAWA, Hiroyuki Maruyama, Hiroyuki Arai, Toshihiro Motoi, Kenji Izumiya, Ryuji Okutomi, Shinobu Kishi, Satoshi Ogata, Kenichi Ozawa, Tadayuki Ueda, Yumiko Higashi
  • Patent number: 7606516
    Abstract: An image printing apparatus includes a control unit which controls a rotational speed of an image carrier; a detecting unit which detects data of the rotational speed; a storage unit which stores the rotational speeds up to n past rotation cycle of said image carrier; and a determining unit which determines whether a rotational speed difference between a latest rotational speed in a current rotation cycle and a rotational speed in n past rotation cycle before the current rotation cycle at a predetermined interval, which includes the same rotational position in respective rotation cycles and its near position, is more than a predetermined reference value, wherein said control unit controls the rotational speed of said image carrier by using the data of rotational speeds at a predetermined interval including the same rotational position in one or n past rotation cycle before the current rotation cycle, and further said control unit controls a rotational speed in a subsequent rotation cycle next to the current r
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: October 20, 2009
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Tadayuki Ueda, Hiroyuki Maruyama, Toshihiro Motoi, Kenji Izumiya, Ryuji Okutomi, Satoshi Ogata
  • Patent number: 7567264
    Abstract: An image forming apparatus for forming color images may include at least two or more colors, having a function of magnification correction of image size by one page unit, the image forming apparatus including: an image carrier; a polygonal mirror rotator independently provided for each color; and a controller which simultaneously conducts first control for changing rotation speed of the polygonal mirror rotator in order for changing image size in a sub-scanning direction perpendicular to a main scanning direction, and second control for correcting a correction amount for color registration error depending on magnification correction of image size, and for adjusting a rotating phase of the polygonal mirror rotator depending on the corrected correction amount for color registration error.
    Type: Grant
    Filed: May 22, 2006
    Date of Patent: July 28, 2009
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventor: Kenji Izumiya
  • Patent number: 7542058
    Abstract: In an image forming apparatus for forming a color image by superposing component color images, a control device obtains position data representing a forming position of each of plural registration mark images for the component color images with respect to a positional reference value arbitrarily determined, divides the position data into each of a unit reference range representing a range in which one mark image is formed, converts the position data divided for each unit reference range into those based on respective reference values representing the front edge of the unit reference ranges, extracts the position data representing ranges common to the mutually overlapping ranges each of which is representing by a couple of position data corresponding to the rising and falling edges of a passage timing pulse as read position data of the mark image of the component color, and calculates the amounts of positional deviations of the component color images from one another on the basis of the position data extracted
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: June 2, 2009
    Assignee: Konica Corporation
    Inventors: Eiji Nishikawa, Hiroyuki Maruyama, Hiroyuki Arai, Toshihiro Motoi, Kenji Izumiya, Ryuji Okutomi, Shinobu Kishi, Satoshi Ogata, Kenichi Ozawa, Tadayuki Ueda, Yumiko Higashi
  • Publication number: 20090059249
    Abstract: An image forming apparatus for forming the image based on the image information on the prescribed surface of the transfer material, having an image forming section 8 to form benchmarks for image position identification at prescribed positions on the sheet, benchmark sensors 11 and 12 to detect the position of the benchmarks formed on the sheet and to output position information, a memory section 30 to memorize the position information detected by the mark sensors 11 and 12, and a control section 15 to carry out statistical processing of the position information memorized in the memory section 30 so as to understand tendency and characteristic of displacement amounts of the benchmarks analyzed quantitatively with time.
    Type: Application
    Filed: December 5, 2007
    Publication date: March 5, 2009
    Inventors: Kenji Izumiya, Hiroshi Oyama, Yumiko Higashi
  • Patent number: 7499072
    Abstract: A color image forming apparatus for forming a color image on a recording medium, includes: an image carrier; a polygon mirror; a signal forming device for forming a pseudo main scanning reference signal having a fixed cycle; and a controller for controlling image formation on a predetermined surface of the recording medium on the basis of the pseudo main scanning reference signal formed by the signal forming device and a main scanning reference signal which is formed by detecting a light beam that is scanned by the polygon mirror.
    Type: Grant
    Filed: April 26, 2005
    Date of Patent: March 3, 2009
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Kenji Izumiya, Satoshi Ogata, Eiji Nishikawa, Yumiko Higashi
  • Patent number: 7453480
    Abstract: In an image forming apparatus for forming a color image by superposing component color images, a control device obtains position data representing a forming position of each of plural registration mark images for the component color images with respect to a positional reference value arbitrarily determined, divides the position data into each of a unit reference range representing a range in which one mark image is formed, converts the position data divided for each unit reference range into those based on respective reference values representing the front edge of the unit reference ranges, extracts the position data representing ranges common to the mutually overlapping ranges each of which is represented by a couple of position data corresponding to the rising and falling edges of a passage timing pulse as read position data of the mark image of the component color, and calculates the amounts of positional deviations of the component color images from one another on the basis of the position data extracted.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: November 18, 2008
    Assignee: Konica Corporation
    Inventors: Eiji Nishikawa, Hiroyuki Maruyama, Hiroyuki Arai, Toshihiro Motoi, Kenji Izumiya, Ryuji Okutomi, Shinobu Kishi, Satoshi Ogata, Kenichi Ozawa, Tadayuki Ueda, Yumiko Higashi