Patents by Inventor Masami Hano

Masami Hano 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: 20200073266
    Abstract: A toner includes toner particle containing at least a strontium titanate particle on the surface of the toner particle, and the toner is a water-washed toner from which strontium titanate particle desorbable by water washing are removed by water washing. The water-washed toner contains the strontium titanate particle having a number average particle diameter of primary particle (D1) of 10 nm or more and 150 nm or less, and when the distribution of an Sr element in the water-washed toner in the depth direction is determined, (i) the Sr element abundance on the outermost surface x satisfying 0.00<x?0.80, and (ii) the difference between x and xp “xp?x” satisfying 0.00<xp?x?0.95, where xp is the maximum peak value (atomic %) of the Sr element abundance in the region from the outermost surface to 50 nm.
    Type: Application
    Filed: August 26, 2019
    Publication date: March 5, 2020
    Inventors: Takeshi Ohtsu, Tadashi Fukuda, Mikihiro Akasaki, Akinori Miyamoto, Kota Mori, Masami Hano, Takashi Kase, Daisuke Tsujimoto, Ryuichiro Matsuo, Kazuto Hosoi, Yoshihiro Ogawa
  • Publication number: 20200073267
    Abstract: An image forming apparatus in which occurrence of an image failure in association with contamination caused by an external additive, such as silica, adhering to a charging unit is suppressed. The image forming apparatus is configured to charge an image bearing member through use of the charging unit, and uses toner having, on a surface thereof, strontium titanate particles and silica particles having predetermined physical properties.
    Type: Application
    Filed: August 23, 2019
    Publication date: March 5, 2020
    Inventors: Akinori Miyamoto, Kota Mori, Masami Hano, Takashi Kase, Tadashi Fukuda, Mikihiro Akasaki, Takeshi Ohtsu
  • Publication number: 20200057401
    Abstract: An image forming apparatus includes a photosensitive member, a first charging roller, a first cleaning member, a second charging roller, and a second cleaning member. The relationship is satisfied (X×L0+L1+L2)?(Y×L3+L4)?0 where L0 represents a length of a whole circumference of the first charging roller, L1 represents a length between the first contact area and the first contact position of the first charging roller and the photosensitive member, L3 represents a length of a whole circumference of the second charging roller, L4 represents a length between the second contact area and the second contact position, L2 represents a length between the first contact position and the second contact position, X represents an integer in a range of 0?X?40, and Y represents an integer in a range of 0?Y?40.
    Type: Application
    Filed: August 9, 2019
    Publication date: February 20, 2020
    Inventors: Tadashi Fukuda, Takahito Fuse, Masami Hano, Shota Soda
  • Publication number: 20190171134
    Abstract: An image forming apparatus includes: a rotatable intermediate transfer member; a first image forming portion having a first photosensitive member which rotates, a first developing unit, and a first charge eliminating unit; a second image forming portion that is located on a downstream side relative to the first image forming portion in a rotational direction of the intermediate transfer member, and that has a second photosensitive member which rotates, a second developing unit, and a second charge eliminating unit; a transfer unit; and a switching unit that switches a light amount of the second charge eliminating unit when a usage amount of the second image forming portion reaches a predetermined amount to a value that is greater than a light amount of the first charge eliminating unit when a usage amount of the first image forming portion reaches the predetermined amount.
    Type: Application
    Filed: November 30, 2018
    Publication date: June 6, 2019
    Inventors: Masami Hano, Takahito Fuse, Tadashi Fukuda, Shota Soda
  • Publication number: 20180284671
    Abstract: An image forming apparatus has a changing portion configured to change, based on a detection result of a temperature sensor, response sensitivity in starting of power supply by a determination portion based on a detection result of a human body detection sensor in a case where a human body approaches the human body detection sensor. The changing portion increases the sensitivity in a case where a temperature detected by the temperature sensor is a second temperature lower than a first temperature than in a case where the temperature detected by the temperature sensor is the first temperature.
    Type: Application
    Filed: March 26, 2018
    Publication date: October 4, 2018
    Inventors: Takahito Fuse, Masami Hano, Kenichiro Kitajima, Tadashi Fukuda, Shota Soda, Hidetaka Nakahara, Hiroyuki Amano
  • Patent number: 10048640
    Abstract: An image forming apparatus includes a temperature/humidity sensor 112 for detecting temperature/humidity information and a controller 101 for executing, on the basis of information detected by this detecting means, an operation in a control mode in which charging by a corona charger 2 and discharging by a discharging means 9 are carried out while rotating a photosensitive member after end of cleaning by the cleaning means and before image formation is started.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: August 14, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masami Hano
  • Patent number: 10031460
    Abstract: An image forming apparatus includes an image forming unit configured to form an image on a sheet, and a measuring unit configured to measure reflected light from the sheet, a backup roller configured to convey the sheet while pressing the sheet toward the measuring unit, and a generating unit configured to control the backup roller to convey the sheet, control the measuring unit to measure the reflected light from the sheet, and generate profile data corresponding to measurement results of the reflected light from a plurality of positions in a direction in which the sheet is conveyed.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: July 24, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masami Hano
  • Patent number: 9912835
    Abstract: Provided is an image forming apparatus including a receiver, the image forming apparatus being controlled based on a copy mode for copying an original read by a reading device that is connectable to the image forming apparatus and a print mode for printing image data received by the receiver. The image forming apparatus further includes an image forming unit configured to form an image, a measurement unit configured to measure a measurement image formed by the image forming unit, a controller configured to control the image forming unit to form the measurement image, and to control the measurement unit to measure the measurement image, and a detector configured to detect a connection state of the reading device. The measurement image includes a first measurement image for the copy mode and a second measurement image for the print mode.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: March 6, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Masami Hano
  • Publication number: 20170248887
    Abstract: An image forming apparatus includes an image forming unit configured to form an image on a sheet, and a measuring unit configured to measure reflected light from the sheet, a backup roller configured to convey the sheet while pressing the sheet toward the measuring unit, and a generating unit configured to control the backup roller to convey the sheet, control the measuring unit to measure the reflected light from the sheet, and generate profile data corresponding to measurement results of the reflected light from a plurality of positions in a direction in which the sheet is conveyed.
    Type: Application
    Filed: February 1, 2017
    Publication date: August 31, 2017
    Inventor: Masami Hano
  • Publication number: 20170171429
    Abstract: Provided is an image forming apparatus including a receiver, the image forming apparatus being controlled based on a copy mode for copying an original read by a reading device that is connectable to the image forming apparatus and a print mode for printing image data received by the receiver. The image forming apparatus further includes an image forming unit configured to form an image, a measurement unit configured to measure a measurement image formed by the image forming unit, a controller configured to control the image forming unit to form the measurement image, and to control the measurement unit to measure the measurement image, and a detector configured to detect a connection state of the reading device. The measurement image includes a first measurement image for the copy mode and a second measurement image for the print mode.
    Type: Application
    Filed: December 6, 2016
    Publication date: June 15, 2017
    Inventor: Masami Hano
  • Patent number: 9665063
    Abstract: To provide an image forming apparatus capable of suppressing an increase in the cost of a process cartridge and capable of reducing image defects caused by replacement of the process cartridge. A process cartridge including a charging roller and a developing unit is attachable to and detachable from an image forming apparatus. A development temperature sensor is disposed in the developing unit. An in-device temperature sensor is disposed outside the process cartridge inside the image forming apparatus. In the case where a temperature detected by the development temperature sensor is lower than a temperature detected by the in-device temperature-humidity sensor, a peak-to-peak voltage of an alternating-current voltage applied to the charging roller is set based on the result of detection by the development temperature sensor.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: May 30, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiro Makino, Masami Hano
  • Publication number: 20170082969
    Abstract: An image forming apparatus includes a temperature/humidity sensor 112 for detecting temperature/humidity information and a controller 101 for executing, on the basis of information detected by this detecting means, an operation in a control mode in which charging by a corona charger 2 and discharging by a discharging means 9 are carried out while rotating a photosensitive member after end of cleaning by the cleaning means and before image formation is started.
    Type: Application
    Filed: December 2, 2016
    Publication date: March 23, 2017
    Inventor: Masami Hano
  • Publication number: 20160320746
    Abstract: To provide an image forming apparatus capable of suppressing an increase in the cost of a process cartridge and capable of reducing image defects caused by replacement of the process cartridge. A process cartridge including a charging roller and a developing unit is attachable to and detachable from an image forming apparatus. A development temperature sensor is disposed in the developing unit. An in-device temperature sensor is disposed outside the process cartridge inside the image forming apparatus. In the case where a temperature detected by the development temperature sensor is lower than a temperature detected by the in-device temperature-humidity sensor, a peak-to-peak voltage of an alternating-current voltage applied to the charging roller is set based on the result of detection by the development temperature sensor.
    Type: Application
    Filed: December 15, 2014
    Publication date: November 3, 2016
    Applicant: Canon Kabushiki Kaisha
    Inventors: Masahiro Makino, Masami Hano
  • Patent number: 9442409
    Abstract: An image forming apparatus includes, a unit including at least a photosensitive member and a charging member detachable from a main body of the image forming apparatus, a current detection unit configured to detect a current flowing between the charging member and the photosensitive member, an operation unit configured to be operated by an operator to give an instruction to the image forming apparatus, a display unit provided in the operation unit, and a control unit configured to apply to the charging member a predetermined test voltage having an absolute value greater than a discharge starting voltage based on the instruction from the operation unit, and to perform an operation in a mode for causing the current detection unit to detect a current, wherein the control unit determines, based on the current detected in the mode, whether an error indication is to be given on the display unit.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: September 13, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masami Hano, Yutaka Koga
  • Patent number: 9323182
    Abstract: An image forming apparatus includes: a belt; a first image forming unit including a first drum; a second image forming unit including a second drum; a contact-and-separation portion; an executing portion; and a controller for rotating the second drum by a predetermined angle so that when a cycle of an operation is to be repeated N times, a position of the second drum contacting the belt in an (N?1)th cycle differs from a position of the second drum contacting the belt in an Nth cycle, the cycle including receiving the image data in a state that the belt and the first and second drums are at rest and in a stand-by state that the image forming apparatus waits for an input of the image data in the first state, executing the image forming operation, and then returning the image forming apparatus to the stand-by state.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: April 26, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiro Makino, Masami Hano
  • Patent number: 9298120
    Abstract: Non-uniform charged potential of a surface of a photosensitive member is suppressed even when a temperature of a charging member newly mounted to an image forming apparatus by exchange is lower than a temperature inside the image forming apparatus. The image forming apparatus includes the photosensitive member, a charge portion, an applying portion for applying a charging bias voltage to the charge portion, a toner image forming portion for forming a toner image on the photosensitive member, a transfer portion, a fixing portion, a first casing accommodating them, and a second casing having a recording material accommodating portion for accommodating a recording material.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: March 29, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masami Hano, Masahiro Makino
  • Publication number: 20150338790
    Abstract: An image forming apparatus includes: a belt; a first image forming unit including a first drum; a second image forming unit including a second drum; a contact-and-separation portion; an executing portion; and a controller for rotating the second drum by a predetermined angle so that when a cycle of an operation is to be repeated N times, a position of the second drum contacting the belt in an (N?1)th cycle differs from a position of the second drum contacting the belt in an Nth cycle, the cycle including receiving the image data in a state that the belt and the first and second drums are at rest and in a stand-by state that the image forming apparatus waits for an input of the image data in the first state, executing the image forming operation, and then returning the image forming apparatus to the stand-by state.
    Type: Application
    Filed: May 18, 2015
    Publication date: November 26, 2015
    Inventors: Masahiro MAKINO, Masami Hano
  • Publication number: 20150261115
    Abstract: Non-uniform charged potential of a surface of a photosensitive member is suppressed even when a temperature of a charging member newly mounted to an image forming apparatus by exchange is lower than a temperature inside the image forming apparatus. The image forming apparatus includes the photosensitive member, a charge portion, an applying portion for applying a charging bias voltage to the charge portion, a toner image forming portion for forming a toner image to the photosensitive member, a transfer portion, a fixing portion, a first casing accommodating them, a second casing having a recording material accommodating portion for accommodating a recording material.
    Type: Application
    Filed: May 15, 2015
    Publication date: September 17, 2015
    Inventors: Masami HANO, Masahiro Makino
  • Patent number: 9116455
    Abstract: A grid of a charging device is cleaned without causing the grid to contact a member to be charged. In this structure, to suppress non-uniform charging due to wear of the grid, which is pulled toward a discharge electrode, for a long time, first and second protective layers are provided. The first protective layer is provided on a surface of a base member of the grid that faces the cleaning member. The second protective layer is provided on a surface of the base member that faces the pressing member. The second protective layer is thicker than the first protective layer.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: August 25, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tadashi Fukuda, Masami Hano
  • Patent number: 9086644
    Abstract: A shutter that suppresses accumulation of discharge products on a photosensitive member is disposed between a grid and the photosensitive member. In this structure, to suppress corrosion of the grid due to the discharge products for a long time, first and second protective layers are provided. The first protective layer is provided on a surface of a base member of the grid that faces the discharge electrode. The second protective layer is provided on a surface of the base member that faces the shutter. The second protective layer is thicker than the first protective layer.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: July 21, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tadashi Fukuda, Masami Hano