Patents by Inventor Masayasu Haga

Masayasu Haga 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: 10691058
    Abstract: An image forming apparatus includes a latent image carrier whose rotational speed changes depending on a printing speed of an image onto a sheet, an applicator that applies a lubricant to a surface of the latent image carrier, and a hardware processor that causes a surface of the applicator to move such that a difference between a first moving speed and a second moving speed is within a certain range, the first moving speed being a speed at which the surface of the latent image carrier moves, the second moving speed being a speed at which the surface of the applicator moves.
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: June 23, 2020
    Assignee: KONICA MINOLTA INC.
    Inventors: Kunitomo Sasaki, Masayasu Haga, Sayaka Morita, Tsugihito Yoshiyama
  • Patent number: 10656548
    Abstract: An image forming apparatus includes: a photoreceptor; a charging member that charges the photoreceptor; a charging power supply that outputs an AC bias as a charging bias to be applied to the charging member during image formation, and outputs a DC bias as the charging bias during a non-image forming operation, the AC bias being obtained by superimposing an alternating current voltage and a direct current voltage, the image formation forming a latent image, the DC bias being a direct current voltage, the non-image forming operation rotating and driving the photoreceptor; a processor that performs predetermined processing on the photoreceptor; and a controller that controls the charging power supply and the processor such that a value of a potential difference of the photoreceptor before and after being charged by the DC bias is a value equal to or less than a setting value during the non-image forming operation.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: May 19, 2020
    Assignee: Konica Minolta, Inc.
    Inventors: Tsugihito Yoshiyama, Masayasu Haga, Sayaka Morita, Kunitomo Sasaki
  • Publication number: 20200133189
    Abstract: An image forming apparatus includes a latent image carrier whose rotational speed changes depending on a printing speed of an image onto a sheet, an applicator that applies a lubricant to a surface of the latent image carrier, and a hardware processor that causes a surface of the applicator to move such that a difference between a first moving speed and a second moving speed is within a certain range, the first moving speed being a speed at which the surface of the latent image carrier moves, the second moving speed being a speed at which the surface of the applicator moves.
    Type: Application
    Filed: October 11, 2019
    Publication date: April 30, 2020
    Applicant: KONICA MINOLTA, INC.
    Inventors: Kunitomo SASAKI, Masayasu HAGA, Sayaka MORITA, Tsugihito YOSHIYAMA
  • Publication number: 20200103780
    Abstract: An image forming apparatus includes: a photoreceptor; a charging member that charges the photoreceptor; a charging power supply that outputs an AC bias as a charging bias to be applied to the charging member during image formation, and outputs a DC bias as the charging bias during a non-image forming operation, the AC bias being obtained by superimposing an alternating current voltage and a direct current voltage, the image formation forming a latent image, the DC bias being a direct current voltage, the non-image forming operation rotating and driving the photoreceptor; a processor that performs predetermined processing on the photoreceptor; and a controller that controls the charging power supply and the processor such that a value of a potential difference of the photoreceptor before and after being charged by the DC bias is a value equal to or less than a setting value during the non-image forming operation.
    Type: Application
    Filed: August 23, 2019
    Publication date: April 2, 2020
    Applicant: KONICA MINOLTA, INC.
    Inventors: Tsugihito Yoshiyama, Masayasu Haga, Sayaka Morita, Kunitomo Sasaki
  • Patent number: 9897966
    Abstract: An image formation apparatus includes: an image carrier; a developing device which develops an electrostatic latent image formed on the image carrier as a toner image; a transfer device which transfers the toner image to a medium; a cleaning device which recovers toner remaining on the image carrier after the toner image is transferred; and a lubricant application adjustment mechanism which applies a lubricant on the image carrier and recovers toner present on the image carrier upstream of the cleaning device; and a controller which controls the lubricant application adjustment mechanism. The controller causes the lubricant application adjustment mechanism to recover more toner when the toner image formed on the image carrier has a larger image area ratio.
    Type: Grant
    Filed: May 6, 2017
    Date of Patent: February 20, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventor: Masayasu Haga
  • Publication number: 20170336750
    Abstract: An image formation apparatus includes: an image carrier; a developing device which develops an electrostatic latent image formed on the image carrier as a toner image; a transfer device which transfers the toner image to a medium; a cleaning device which recovers toner remaining on the image carrier after the toner image is transferred; and a lubricant application adjustment mechanism which applies a lubricant on the image carrier and recovers toner present on the image carrier upstream of the cleaning device; and a controller which controls the lubricant application adjustment mechanism. The controller causes the lubricant application adjustment mechanism to recover more toner when the toner image formed on the image carrier has a larger image area ratio.
    Type: Application
    Filed: May 6, 2017
    Publication date: November 23, 2017
    Applicant: KONICA MINOLTA, INC.
    Inventor: Masayasu HAGA
  • Publication number: 20170182710
    Abstract: A three-dimensional fabricated object manufacturing apparatus (1) provided with a fabrication block (20), an information code-forming block (30) and a position code-forming block (40). The fabrication block (20) sequentially stacks fabrication material layer by layer. The information code-forming block (30) forms an information code in which information for identifying the three-dimensional fabricated object is encoded inside the three-dimensional fabricated object that is fabricated by the fabrication block (20). The position code-forming block (40) forms a position code in which information representing the information code formation position in the three-dimensional fabricated object is encoded inside or on the surface of the three-dimensional fabricated object.
    Type: Application
    Filed: February 27, 2015
    Publication date: June 29, 2017
    Inventors: Masayasu HAGA, Eiji TABATA, Toshiya NATSUHARA, Tomoo IZUMI
  • Publication number: 20170021571
    Abstract: The manufacturing apparatus (1) for three-dimensional moldings is provided with a molding block (20), a tag-supplying block (30) and a control unit (12). The molding block (20) is a molding device for molding a three-dimensional object by successively layering molding material layer by layer. The tag-supplying block (30) is a tag-supplying device for supplying a wireless communication tag to a specified position. The control unit (12) causes the tag-supplying block (30) to supply the wireless communication tag to the specified position of the molding material during layering of the molding material by the molding block (20) so that the wireless communication tag is embedded inside the three-dimensional molding that is obtained by layering the molding material.
    Type: Application
    Filed: January 19, 2015
    Publication date: January 26, 2017
    Applicant: Konica Minolta, Inc.
    Inventors: Masayasu HAGA, Eiji TABATA, Toshiya NATSUHARA, Tomoo IZUMI
  • Patent number: 9041973
    Abstract: Having specified written information on a first card newly placed at a base A which is a first workspace and the position where the first card is placed, a PC (100A) which is a control device at base A stores, in a memory, the written information and the position where the first card is placed as card information. A PC (100B) connected to this PC instructs a printing device (200B) to print a second card based on the specified written information. The PC (100B) presents the position where the second card is to be placed at a base B which is a second workspace based on the specified position where the first card is placed.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: May 26, 2015
    Assignee: KONICA MINOLTA, INC.
    Inventors: Eiji Tabata, Toshihito Kobayashi, Sayaka Morita, Masayasu Haga
  • Publication number: 20140320870
    Abstract: Having specified written information on a first card newly placed at a base A which is a first workspace and the position where the first card is placed, a PC (100A) which is a control device at base A stores, in a memory, the written information and the position where the first card is placed as card information. A PC (100B) connected to this PC instructs a printing device (200B) to print a second card based on the specified written information. The PC (100B) presents the position where the second card is to be placed at a base B which is a second workspace based on the specified position where the first card is placed.
    Type: Application
    Filed: April 25, 2014
    Publication date: October 30, 2014
    Applicant: KONICA MINOLTA, INC.
    Inventors: Eiji TABATA, Toshihito KOBAYASHI, Sayaka MORITA, Masayasu HAGA
  • Patent number: 8824938
    Abstract: An image forming apparatus, wherein the packing density at a closest point where the first peripheral surface and the second peripheral surface are the closest to each other is within a range from 0.3 to 0.4; wherein a maximum magnetic flux density of a principal magnetic pole for generating the magnetic field for development is located in an upstream side from the closest point with respect to the specified direction and at a point where the packing density is equal to or greater than 0.2; and wherein a magnetic flux density of the principal magnetic pole at a point where the packing density is 0.2 in a downstream side from the closest point with respect to the specified direction is equal to or less than ½ of a magnetic flux density of the principal magnetic pole at a point where the packing density is 0.2 in the upstream side.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: September 2, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Kanji Nakayama, Masayasu Haga, Tomohisa Yoshida, Wataru Onoda, Narutaka Yoshida, Noboru Ito
  • Patent number: 8693929
    Abstract: An image forming apparatus for forming a toner image on a print medium with a developer composed of toner and carriers, wherein when the first distance is longer than the second distance, an average gap between the first peripheral surface and a member that faces to the first peripheral surface in an area with a length of the first distance extending upstream from the closest point with respect to the specified direction is smaller than an average gap between the first peripheral surface and a member that faces to the first peripheral surface in an area with a length of the first distance extending downstream from the closest point with respect to the specified direction.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: April 8, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Tomohisa Yoshida, Masayasu Haga, Kanji Nakayama, Wataru Onoda, Narutaka Yoshida, Noboru Ito
  • Patent number: 8639167
    Abstract: A two-component developing device using a developer containing toner and magnetic carrier particles. The developing device comprises a housing, a developing roller, a magnetic field generator mounted inside the developing roller, and a developer restricting member, and further comprises a developer guide member providing a developer guide path for guiding the developer to the developer amount restricting clearance, providing a developer circulation path for circulating the developer to an upstream end of the guide member, and providing a communication path for bringing the developer guide path into communication with the developer circulation path, an upstream end of the guide member being positioned above the position of a peak of magnetic flux density of the magnetic pole of the magnetic field generator which is closest to a low-magnetic force area downstream of the low-magnetic force area or positioned upstream of such a position and downstream of the low-magnetic force area.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: January 28, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Kanji Nakayama, Masayasu Haga, Tomohisa Yoshida, Wataru Onoda, Yoshiyuki Iguchi, Noboru Ito
  • Publication number: 20120177416
    Abstract: An image forming apparatus, wherein the packing density at a closest point where the first peripheral surface and the second peripheral surface are the closest to each other is within a range from 0.3 to 0.4; wherein a maximum magnetic flux density of a principal magnetic pole for generating the magnetic field for development is located in an upstream side from the closest point with respect to the specified direction and at a point where the packing density is equal to or greater than 0.2; and wherein a magnetic flux density of the principal magnetic pole at a point where the packing density is 0.2 in a downstream side from the closest point with respect to the specified direction is equal to or less than ½ of a magnetic flux density of the principal magnetic pole at a point where the packing density is 0.2 in the upstream side.
    Type: Application
    Filed: January 5, 2012
    Publication date: July 12, 2012
    Applicant: Konica Minolta Business Technologies, Inc.
    Inventors: Kanji NAKAYAMA, Masayasu Haga, Tomohisa Yoshida, Wataru Onoda, Narutaka Yoshida, Noboru Ito
  • Publication number: 20120177415
    Abstract: An image forming apparatus for forming a toner image on a print medium with a developer composed of toner and carriers, wherein when the first distance is longer than the second distance, an average gap between the first peripheral surface and a member that faces to the first peripheral surface in an area with a length of the first distance extending upstream from the closest point with respect to the specified direction is smaller than an average gap between the first peripheral surface and a member that faces to the first peripheral surface in an area with a length of the first distance extending downstream from the closest point with respect to the specified direction.
    Type: Application
    Filed: January 4, 2012
    Publication date: July 12, 2012
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.,
    Inventors: Tomohisa Yoshida, Masayasu Haga, Kanji Nakayama, Wataru Onoda, Narutaka Yoshida, Noboru Ito
  • Publication number: 20120003014
    Abstract: A two-component developing device using a developer containing toner and magnetic carrier particles. The developing device comprises a housing, a developing roller, a magnetic field generator mounted inside the developing roller, and a developer restricting member, and further comprises a developer guide member providing a developer guide path for guiding the developer to the developer amount restricting clearance, providing a developer circulation path for circulating the developer to an upstream end of the guide member, and providing a communication path for bringing the developer guide path into communication with the developer circulation path, an upstream end of the guide member being positioned above the position of a peak of magnetic flux density of the magnetic pole of the magnetic field generator which is closest to a low-magnetic force area downstream of the low-magnetic force area or positioned upstream of such a position and downstream of the low-magnetic force area.
    Type: Application
    Filed: June 30, 2011
    Publication date: January 5, 2012
    Applicant: Konica Minolta Business Technologies, Inc.
    Inventors: Kanji NAKAYAMA, Masayasu Haga, Tomohisa Yoshida, Wataru Onoda, Yoshiyuki Iguchi, Noboru Ito
  • Patent number: 7149447
    Abstract: An image forming device is provided that is capable of easily preventing occurrence of stripe-like image noise that may be caused by intimate contact between a contact electrifying member and an image carrier even when an image forming operation is stopped for a while. In the image forming device having an electrifying roller in contact with a photoconductor, AC voltage is applied to the electrifying roller before the image carrier and the electrifying roller start rotating.
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: December 12, 2006
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventor: Masayasu Haga
  • Publication number: 20040240900
    Abstract: An image forming device is provided that is capable of easily preventing occurrence of stripe-like image noise that may be caused by intimate contact between a contact electrifying member and an image carrier even when an image forming operation is stopped for a while. In the image forming device having an electrifying roller in contact with a photoconductor, AC voltage is applied to the electrifying roller before the image carrier and the electrifying roller start rotating.
    Type: Application
    Filed: May 27, 2004
    Publication date: December 2, 2004
    Applicant: Konica Minolta Business Technologies, Inc,
    Inventor: Masayasu Haga
  • Patent number: 6618188
    Abstract: Provided is a rewritable display sheet capable of displaying different images on both surfaces. The rewritable display sheet 10 of the present invention is provided with a conductive substrate 12 that has a voltage applying section 12a at an end portion, transparent sheets 14 and 16 provided on both sides of the conductive substrate 12, and display layers 18 and 20 which are provided between the conductive substrate 12 and the transparent sheets 14 and 16 and in which an image is written with an electric field applied.
    Type: Grant
    Filed: March 15, 2002
    Date of Patent: September 9, 2003
    Assignee: Minolta Co., Ltd.
    Inventor: Masayasu Haga
  • Publication number: 20020135859
    Abstract: Provided is a rewritable display sheet capable of displaying different images on both surfaces. The rewritable display sheet 10 of the present invention is provided with a conductive substrate 12 that has a voltage applying section 12a at an end portion, transparent sheets 14 and 16 provided on both sides of the conductive substrate 12, and display layers 18 and 20 which are provided between the conductive substrate 12 and the transparent sheets 14 and 16 and in which an image is written with an electric field applied.
    Type: Application
    Filed: March 15, 2002
    Publication date: September 26, 2002
    Inventor: Masayasu Haga