Patents by Inventor Kentaro Katori

Kentaro Katori 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).

  • Patent number: 10514015
    Abstract: A control device of an internal combustion engine is provided. In the case where a switch request for switching from all-cylinder operation to partial-cylinder operation is made, before a switch from the all-cylinder operation to the partial-cylinder operation is executed, an intake air amount increase control increasing an intake air flow rate of an engine by increasing an opening degree of a throttle valve is performed, an ignition timing retardation control retarding an ignition timing is performed, and based on a retardation limit value of the ignition timing at a time point when the switch request is made, a start timing of the intake air amount increase control is changed. As a retardable amount being a difference between an initial ignition timing and the retardation limit value decreases, the start timing of the intake air amount increase control is delayed further.
    Type: Grant
    Filed: July 2, 2018
    Date of Patent: December 24, 2019
    Assignee: Honda Motor Co., Ltd.
    Inventors: Hideyuki Hayashi, Yuto Katori, Hiroki Miyazono, Daisuke Shiomi, Kentaro Onuma
  • Patent number: 8406645
    Abstract: Developing bias is set as follows. An electric field intensity between a developing roller and a photoconductor is set to cause normally-charged toner to fly in an image area and not to cause the toner to fly in a background area. Thus, the normally-charged toner does not fly in the background area. The normally-charged toner caused to fly is therefore unlikely to flick low-charged toner and oppositely-charged toner. The low-charged toner and the oppositely-charged toner will not adhere to the background area and cause image fogging. Accordingly, an image forming apparatus can be provided to prevent the low-charged toner and the oppositely-charged toner from adhering to the background area of an electrostatic latent image on the photoconductor and to avoid the occurrence of image fogging in the background area on a printed material.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: March 26, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Yuusuke Okuno, Kentaro Katori, Kanji Nakayama, Tomo Kitada, Toru Hayase
  • Patent number: 7853161
    Abstract: A potential difference between the photoreceptor and the development roller is set at a value at which the normally charged toner on the development roller can be flown toward the photoreceptor in the development phase at the time of compulsorily consuming the toner, and this potential difference is set at a value at which the flown normally charged toner can be returned to the development roller in the recovery phase.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: December 14, 2010
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Toru Hayase, Kuniya Matsuura, Yuusuke Okuno, Kentaro Katori, Hiromasa Ueno, Hideaki Hayashi
  • Publication number: 20090304404
    Abstract: Developing bias is set as follows. An electric field intensity between a developing roller and a photoconductor is set to cause normally-charged toner to fly in an image area and not to cause the toner to fly in a background area. Thus, the normally-charged toner does not fly in the background area. The normally-charged toner caused to fly is therefore unlikely to flick low-charged toner and oppositely-charged toner. The low-charged toner and the oppositely-charged toner will not adhere to the background area and cause image fogging. Accordingly, an image forming apparatus can be provided to prevent the low-charged toner and the oppositely-charged toner from adhering to the background area of an electrostatic latent image on the photoconductor and to avoid the occurrence of image fogging in the background area on a printed material.
    Type: Application
    Filed: May 28, 2009
    Publication date: December 10, 2009
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Yuusuke OKUNO, Kentaro Katori, Kanji Nakayama, Tomo Kitada, Toru Hayase
  • Publication number: 20090175636
    Abstract: To prevent image defects such as fog and irregularities caused by the accumulation of the oppositely charged toner by flying the toner toward a photoreceptor to compulsorily consume the toner even though the toner is oppositely charged toner having a small charged amount. A potential difference between the photoreceptor and the development roller is set at a value at which the normally charged toner on the development roller can be flown toward the photoreceptor in the development phase at the time of compulsorily consuming the toner, and this potential difference is set at a value at which the flown normally charged toner can be returned to the development roller in the recovery phase.
    Type: Application
    Filed: December 11, 2008
    Publication date: July 9, 2009
    Applicant: Konica Minolta Business Technologies, Inc.
    Inventors: Toru Hayase, Kuniya Matsuura, Yuusuke Okuno, Kentaro Katori, Hiromasa Ueno, Hideaki Hayashi
  • Patent number: 7324776
    Abstract: A color printer including, a conductive brush roller to contact a photosensitive drum at a position downstream of a transferring apparatus and upstream of a charging apparatus, wherein at least part of residual toner is collected after temporarily transferring on the photosensitive drum, and the collected toner is expelled onto the photosensitive drum, a charge electrode facing the brush roller at a position other than the contact position of the photosensitive drum and the brush roller, and a power source to apply voltage to the charge electrode, wherein the polarity of the voltage applied from the power source to the charge electrode with respect to the average voltage of the surface of the photosensitive drum after transferring is the same as a charging polarity of the toner at developing.
    Type: Grant
    Filed: January 5, 2005
    Date of Patent: January 29, 2008
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Akira Hirota, Hiroaki Umemoto, Noritoshi Hagimoto, Kuniya Matsuura, Naotoshi Kawai, Kentaro Katori
  • Patent number: 7251055
    Abstract: An image forming apparatus using an exposure unit of a solid-scanning type such as an LED head, reads out linear distortion correction data of an LED unit, then, calculates an amount of correcting color deviation based on the read-out data, and after that, carries out address control for color deviation correction memory. Based on this control, the apparatus creates a reference resist patterns, calculates an amount of correcting the color deviation, and writes the calculated amount in the color deviation correction memory. After that, the apparatus reads out the linear distortion correction data, and adds the amount of correcting the color deviation that is determined by sensors, and the amount of the color correction based on the linear distortion correction data, thereby carries out address controls for the color deviation correction memory.
    Type: Grant
    Filed: February 15, 2001
    Date of Patent: July 31, 2007
    Assignee: Minolta Co., Ltd.
    Inventors: Kenichi Sawada, Junji Nishigaki, Fujio Hashimoto, legal representative, Nobue Hashimoto, legal representative, Kentaro Katori, Yoshihiko Hirota, Tomoji Tanaka, Keisuke Hashimoto, deceased
  • Patent number: 7197264
    Abstract: It is intended to provide an image forming apparatus capable of conducting charge adjustment of post-transfer residual toner appropriately by securing a contact area of a temporarily-collecting member and an electrode, without applying excessive deformation load to the temporarily-collecting member. There are arranged a brush roller for temporarily collecting post-transfer residual toner, and an electrode of which inwardly-curved face being in contact with the brush roller in a toner charge apparatus. Thereby, charged-in-opposite-polarity toner, out of post-transfer residual toner, is collected by the brush roller, polarity of the toner is reversed to original polarity, and then, returned to a photosensitive drum. The inner face of the electrode, i.e., a contact face of the electrode and the brush roller is formed in an inwardly-curved face. Thereby, a large contact area and light pushing force of the electrode to the brush roller can go together.
    Type: Grant
    Filed: December 27, 2004
    Date of Patent: March 27, 2007
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hiroaki Umemoto, Noritoshi Hagimoto, Kuniya Matsuura, Akira Hirota, Naotoshi Kawai, Kentaro Katori
  • Patent number: 7136599
    Abstract: It is intended to provide a developing apparatus, an image forming apparatus and developing method capable of managing both decrease of load on apparatuses and improvement of image quality in case development of an image is made by applying contact developing and AC developing. For that intention, voltage at a portion between a development member and an image carrier is defined oscillating voltage, and in case negative polarity toner is used, relations of peak voltage V1 of oscillating voltage, background portion voltage VH (negative) and visible section voltage VL (negative, an absolute value of it is smaller than that of VH) are set as indicated below. ?500V?V1?VL??350V ?200V?V1?VH??50V On the above conditions, peak voltage V2 is set as indicated below. ?150V?VL?V2??70V V2?VH+500V.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: November 14, 2006
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Masahiko Matsuura, Kentaro Katori
  • Patent number: 7092649
    Abstract: An image forming apparatus has a charging member opposed to an outer circumferential surface of a rotating object to be charged. The image forming apparatus has a voltage applying section for applying a pulsating voltage Vsp between the charging member and the object to be charged. The pulsating voltage Vsp is obtained by superimposing a voltage component of a direct current on a voltage component that periodically changes. The image forming apparatus is made to satisfy a relation of Vpp?|Vth|, where Vpp is a peak-to-peak voltage value of the pulsating voltage Vsp and Vth is a charging start voltage value of the object to be charged. The relation prevents opposite charge from being imparted to residual toner on the object to be charged.
    Type: Grant
    Filed: August 24, 2004
    Date of Patent: August 15, 2006
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Akira Hirota, Kentaro Katori, Masahiko Matsuura
  • Publication number: 20060083549
    Abstract: It is intended to provide an image forming apparatus capable of conducting charge adjustment of post-transfer residual toner appropriately by securing a contact area of a temporarily-collecting member and an electrode, without applying excessive deformation load to the temporarily-collecting member. There are arranged a brush roller for temporarily collecting post-transfer residual toner, and an electrode of which inwardly-curved face being in contact with the brush roller in a toner charge apparatus. Thereby, charged-in-opposite-polarity toner, out of post-transfer residual toner, is collected by the brush roller, polarity of the toner is reversed to original polarity, and then, returned to a photosensitive drum. The inner face of the electrode, i.e., a contact face of the electrode and the brush roller is formed in an inwardly-curved face. Thereby, a large contact area and light pushing force of the electrode to the brush roller can go together.
    Type: Application
    Filed: December 27, 2004
    Publication date: April 20, 2006
    Applicant: Konica Minolta Business Technologies, Inc.
    Inventors: Hiroaki Umemoto, Noritoshi Hagimoto, Kuniya Matsuura, Akira Hirota, Naotoshi Kawai, Kentaro Katori
  • Publication number: 20060083548
    Abstract: The color printer of the invention comprises a conductive brush roller contacting with a photosensitive drum at a position downstream of a transferring apparatus and upstream of a charging apparatus, collecting at least part of residual toner after transferring on the photosensitive drum temporarily, and expelling the collected toner onto the photosensitive drum, a charge electrode facing the brush roller at a position other than the contact position of the photosensitive drum and brush roller, and a power source for applying voltage to the charge electrode. The polarity of the voltage applied from the power source to the charge electrode with respect to the average voltage of the surface of the photosensitive drum after transferring is the same as a charging polarity of the toner at developing.
    Type: Application
    Filed: January 5, 2005
    Publication date: April 20, 2006
    Applicant: Konica Minolta Business Technologies, Inc.
    Inventors: Akira Hirota, Hiroaki Umemoto, Noritoshi Hagimoto, Kuniya Matsuura, Naotoshi Kawai, Kentaro Katori
  • Patent number: 6982813
    Abstract: An image forming device capable of providing an image of excellent quality without unevenness of density. According to the image forming device, a controller measures light quantity for each light emitting element of the exposing device as to the pattern where only one of the light emitting elements is turned on, and as to the pattern where all the light emitting elements are turned on. Based on the data about the measured light quantity, a change rate in the light quantity distribution of the exposing device is calculated. Based on the data about the measured light quantity and the change rate in the light quantity distribution calculated, correction value for each of the light emitting elements of the exposing device is determined.
    Type: Grant
    Filed: February 6, 2001
    Date of Patent: January 3, 2006
    Assignee: Minolta Co., Ltd.
    Inventors: Katsuyuki Hirata, Kentaro Katori, Tetsuya Sakai, Tomoki Wada
  • Publication number: 20050220470
    Abstract: An image forming apparatus has a charging member opposed to an outer circumferential surface of a rotating object to be charged. The image forming apparatus has a voltage applying section for applying a pulsating voltage Vsp between the charging member and the object to be charged. The pulsating voltage Vsp is obtained by superimposing a voltage component of a direct current on a voltage component that periodically changes. The image forming apparatus is made to satisfy a relation of Vpp?|Vth|, where Vpp is a peak-to-peak voltage value of the pulsating voltage Vsp and Vth is a charging start voltage value of the object to be charged. The relation prevents opposite charge from being imparted to residual toner on the object to be charged.
    Type: Application
    Filed: August 24, 2004
    Publication date: October 6, 2005
    Applicant: Konica Minolta Business Technologies, Inc.
    Inventors: Akira Hirota, Kentaro Katori, Masahiko Matsuura
  • Publication number: 20050196189
    Abstract: It is intended to provide a developing apparatus, an image forming apparatus and developing method capable of managing both decrease of load on apparatuses and improvement of image quality in case development of an image is made by applying contact developing and AC developing. For that intention, voltage at a portion between a development member and an image carrier is defined oscillating voltage, and in case negative polarity toner is used, relations of peak voltage V1 of oscillating voltage, background portion voltage VH (negative) and visible section voltage VL (negative, an absolute value of it is smaller than that of VH) are set as indicated below. ?500V?V1?VL??350V ?200V?V1?VH??50V On the above conditions, peak voltage V2 is set as indicated below.
    Type: Application
    Filed: November 5, 2004
    Publication date: September 8, 2005
    Applicant: Konica Minolta Business Technologies, Inc.
    Inventors: Masahiko Matsuura, Kentaro Katori
  • Patent number: 6462838
    Abstract: A method of and apparatus for forming an image adapted to apply an error diffusion method to an input image data having N gradations so as to convert it into an output image data having M gradations, where M<N. Correspondence between N-stage gradation levels of the input image data and M-stage gradation levels of the output image data can be varied. This apparatus for forming an image has control means for setting the aforesaid correspondence in accordance with data obtained from the measurement of the image densities of a printout having specific gradation levels which do not give rise to errors in the aforesaid conversion.
    Type: Grant
    Filed: March 24, 1999
    Date of Patent: October 8, 2002
    Assignee: Minolta Co., Ltd.
    Inventors: Katsuyuki Hirata, Kentaro Katori
  • Patent number: 6388768
    Abstract: An image forming apparatus for forming an image with few defects even when making a copy from a copied image. When forming an image, a standard pattern is formed outside the image forming area in accordance with standard pattern data for color correction. When reading the image together with the standard pattern formed above, the color correction conditions for the image data are modified in accordance with the comparison result between the read standard pattern data and the standard pattern data for color correction. Copying is then performed on a copying paper.
    Type: Grant
    Filed: February 9, 1998
    Date of Patent: May 14, 2002
    Assignee: Minolta Co., Ltd.
    Inventors: Yoshinobu Hada, Yukihiko Okuno, Masahiro Kouzaki, Kentaro Katori, Katsuyuki Hirata
  • Publication number: 20010055120
    Abstract: An image forming apparatus using an exposure unit of a solid-scanning type such as an LED head, reads out linear distortion correction data of an LED unit, then, calculates an amount of correcting color deviation based on the read-out data, and after that, carries out address control for color deviation correction memory. Based on this control, the apparatus creates a reference resist patterns, calculates an amount of correcting the color deviation, and writes the calculated amount in the color deviation correction memory. After that, the apparatus reads out the linear distortion correction data, and adds the amount of correcting the color deviation that is determined by sensors, and the amount of the color correction based on the linear distortion correction data, thereby carries out address controls for the color deviation correction memory.
    Type: Application
    Filed: February 15, 2001
    Publication date: December 27, 2001
    Inventors: Kenichi Sawada, Junji Nishigaki, Keisuke Hashimoto, Kentaro Katori, Yoshihiko Hirata, Tomoji Tanaka, Fujio Hashimoto, Nobue Hashimoto
  • Publication number: 20010040676
    Abstract: An image forming device capable of providing an image of excellent quality without unevenness of density. According to the image forming device, a controller measures light quantity for each light emitting element of the exposing device as to the pattern where only one of the light emitting elements is turned on, and as to the pattern where all the light emitting elements are turned on. Based on the data about the measured light quantity, a change rate in the light quantity distribution of the exposing device is calculated. Based on the data about the measured light quantity and the change rate in the light quantity distribution calculated, correction value for each of the light emitting elements of the exposing device is determined.
    Type: Application
    Filed: February 6, 2001
    Publication date: November 15, 2001
    Inventors: Katsuyuki Hirata, Kentaro Katori, Tetsuya Sakai, Tomoki Wada
  • Patent number: 6285800
    Abstract: An apparatus and method for processing an image which are capable of producing a printed image satisfying both resolution and reproducibility of gradation. This method admits as an input the RGB data of the size of one pixel and converts this input into lightness data and density data. When a target pixel is determined to correspond to a non-edge portion, the method performs a computation for finding the remainder 1 of X/3 and the remainder m of Y/3 from the coordinates (X,Y) of the target pixel thereby deciding which of the total of nine pixels of a non-edge grade dither pattern is to be extracted, and allocates the position d(l,m) to the extracted pixel. On the other hand, when the target pixel is determined to correspond to an edge portion, an edge grade dither pattern corresponding to the density of the target pixel is allocated directly to the target pixel.
    Type: Grant
    Filed: October 27, 1998
    Date of Patent: September 4, 2001
    Assignee: Minolta Co., Ltd.
    Inventors: Tsutomu Yamazaki, Naoki Toyoshi, Kentaro Katori, Shinichi Takemoto