Patents by Inventor Masafumi Yamada

Masafumi Yamada 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: 11014380
    Abstract: A heating device includes a pre-heater configured to pre-heat a medium, onto which a liquid is discharged from a liquid discharger, at a first position upstream of the liquid discharger in a conveyance direction of the medium, a print-heater configured to heat the medium at a second position opposite the liquid discharger, a post-heater configured to post-heat the medium at a third position downstream of the second position in the conveyance direction, and circuitry configured to control a temperature of each of the pre-heater, the print-heater, and the post-heater. The pre-heater includes a first pre-heater and a second pre-heater disposed closer to the print-heater than the first pre-heater, and the circuitry controls a temperature of the second pre-heater to be between a temperature of the first pre-heater and the temperature of the print-heater.
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: May 25, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Masafumi Yamada, Osamu Kizaki, Shizuho Katahira, Junji Nakai
  • Patent number: 11007796
    Abstract: An image forming apparatus includes a heater, a first temperature sensor, a second temperature sensor, and processing circuitry. The heater is configured to heat a medium on which an image is formed. The first temperature sensor is configured to measure a temperature of the heater. The second temperature sensor is configured to measure a temperature of a region heated by the heater. The processing circuitry is configured to control the temperature of the heater. The processing circuitry is configured to control the heater based on a comparison between a measured temperature of the first temperature sensor and a first threshold value, and a comparison between a measured temperature of the second temperature sensor and a second threshold value.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: May 18, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Osamu Kizaki, Junji Nakai, Masafumi Yamada, Shizuho Katahira
  • Publication number: 20210122171
    Abstract: A liquid discharge apparatus includes a heater configured to heat a medium, a detector configured to detect a temperature of the heater, a conveyor configured to convey the medium during a printing operation, and circuitry configured to control the heater to heat the medium with a first output during a preheating operation before the printing operation, control the heater to heat the medium with a second output that is equal to or higher than the first output when the temperature of the heater reaches a predetermined threshold value to complete the preheating operation, and control the conveyor to start conveying the medium to start the printing operation.
    Type: Application
    Filed: September 28, 2020
    Publication date: April 29, 2021
    Inventor: Masafumi YAMADA
  • Patent number: 10960908
    Abstract: An extraction unit (121) determines, by using a fixed composition file, a fixed composition including a car having a specified equipment installed thereon as a fixed specified composition. The extraction unit determines, by using an operation composition file, an operation composition including the fixed specified composition as an operation specified composition. The extraction unit extracts, from an environment file, environment information corresponding to a set of a specified time and the operation specified composition. A conversion unit (122) converts, by using the environment information, state information indicating the state of the specified equipment at the specified time to comparative information indicating the state of the specified equipment in a reference environment. An evaluation unit (123) compares the comparative information with reference information. Then, the evaluation unit evaluates the state of the specified equipment at the specified time based on the comparison result.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: March 30, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Masafumi Yamada, Takeshi Takeuchi, Norimitsu Nagashima
  • Patent number: 10807388
    Abstract: An image forming apparatus includes a plurality of heaters, a plurality of temperature sensors, an object sensor, and control circuitry. The temperature sensors are formed at positions corresponding to the heaters. The object sensor is configured to detect an overlap region of a medium and the heaters. The control circuitry is configured to correct temperature information acquired by the temperature sensors, according to the overlap region detected by the object sensor and the positions of the temperature sensors, and control the heaters based on the corrected temperature information.
    Type: Grant
    Filed: September 23, 2019
    Date of Patent: October 20, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Osamu Kizaki, Junji Nakai, Masafumi Yamada, Shizuho Katahira
  • Patent number: 10787003
    Abstract: A treatment-liquid application device includes a treatment liquid applicator to apply a treatment liquid to an application target object to which a black liquid and a color liquid other than the black liquid are applied. The treatment liquid applicator applies a greater amount of the treatment liquid per unit area to at least a region to which the color liquid is applied than a region to which the black liquid is applied.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: September 29, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Ryuuya Moriya, Masafumi Yamada
  • Publication number: 20200164662
    Abstract: A heating device includes a pre-heater configured to pre-heat a medium, onto which a liquid is discharged from a liquid discharger, at a first position upstream of the liquid discharger in a conveyance direction of the medium, a print-heater configured to heat the medium at a second position opposite the liquid discharger, a post-heater configured to post-heat the medium at a third position downstream of the second position in the conveyance direction, and circuitry configured to control a temperature of each of the pre-heater, the print-heater, and the post-heater. The pre-heater includes a first pre-heater and a second pre-heater disposed closer to the print-heater than the first pre-heater, and the circuitry controls a temperature of the second pre-heater to be between a temperature of the first pre-heater and the temperature of the print-heater.
    Type: Application
    Filed: November 7, 2019
    Publication date: May 28, 2020
    Applicant: Ricoh Company, Ltd.
    Inventors: Masafumi Yamada, Osamu Kizaki, Shizuho Katahira, Junji Nakai
  • Publication number: 20200101766
    Abstract: An image forming apparatus includes a plurality of heaters, a plurality of temperature sensors, an object sensor, and control circuitry. The temperature sensors are formed at positions corresponding to the heaters. The object sensor is configured to detect an overlap region of a medium and the heaters. The control circuitry is configured to correct temperature information acquired by the temperature sensors, according to the overlap region detected by the object sensor and the positions of the temperature sensors, and control the heaters based on the corrected temperature information.
    Type: Application
    Filed: September 23, 2019
    Publication date: April 2, 2020
    Applicant: Ricoh Company, Ltd.
    Inventors: Osamu Kizaki, Junji Nakai, Masafumi Yamada, Shizuho Katahira
  • Publication number: 20200103794
    Abstract: An image forming apparatus includes a heater, a first temperature sensor, a second temperature sensor, and processing circuitry. The heater is configured to heat a medium on which an image is formed. The first temperature sensor is configured to measure a temperature of the heater. The second temperature sensor is configured to measure a temperature of a region heated by the heater. The processing circuitry is configured to control the temperature of the heater. The processing circuitry is configured to control the heater based on a comparison between a measured temperature of the first temperature sensor and a first threshold value, and a comparison between a measured temperature of the second temperature sensor and a second threshold value.
    Type: Application
    Filed: September 24, 2019
    Publication date: April 2, 2020
    Applicant: Ricoh Company, Ltd.
    Inventors: Osamu Kizaki, Junji Nakai, Masafumi Yamada, Shizuho Katahira
  • Patent number: 10556449
    Abstract: A liquid discharge apparatus includes a conveyor to repeat conveyance of a recording medium by a predetermined distance and stop of conveyance of the recording medium; a liquid discharge head to discharge a liquid onto the recording medium; an irradiation device disposed downstream from the liquid discharge head in a direction of conveyance of the recording medium, to irradiate, with an electromagnetic wave, the recording medium onto which the liquid has been discharged by the liquid discharge head; and circuitry configured to control the irradiation device to irradiate the recording medium. The circuitry is configured to set a first irradiation amount during the stop of conveyance to a larger value than a value of a second irradiation amount during the conveyance of the recording medium.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: February 11, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Junji Nakai, Masafumi Yamada
  • Publication number: 20190275812
    Abstract: A treatment-liquid application device includes a treatment liquid applicator to apply a treatment liquid to an application target object to which a black liquid and a color liquid other than the black liquid are applied. The treatment liquid applicator applies a greater amount of the treatment liquid per unit area to at least a region to which the color liquid is applied than a region to which the black liquid is applied.
    Type: Application
    Filed: March 6, 2019
    Publication date: September 12, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Ryuuya Moriya, Masafumi Yamada
  • Publication number: 20190232987
    Abstract: An extraction unit (121) determines, by using a fixed composition file, a fixed composition including a car having a specified equipment installed thereon as a fixed specified composition. The extraction unit determines, by using an operation composition file, an operation composition including the fixed specified composition as an operation specified composition. The extraction unit extracts, from an environment file, environment information corresponding to a set of a specified time and the operation specified composition. A conversion unit (122) converts, by using the environment information, state information indicating the state of the specified equipment at the specified time to comparative information indicating the state of the specified equipment in a reference environment. An evaluation unit (123) compares the comparative information with reference information. Then, the evaluation unit evaluates the state of the specified equipment at the specified time based on the comparison result.
    Type: Application
    Filed: August 10, 2016
    Publication date: August 1, 2019
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Masafumi YAMADA, Takeshi TAKEUCHI, Norimitsu NAGASHIMA
  • Publication number: 20190100032
    Abstract: A liquid discharge apparatus includes a conveyor to repeat conveyance of a recording medium by a predetermined distance and stop of conveyance of the recording medium; a liquid discharge head to discharge a liquid onto the recording medium; an irradiation device disposed downstream from the liquid discharge head in a direction of conveyance of the recording medium, to irradiate, with an electromagnetic wave, the recording medium onto which the liquid has been discharged by the liquid discharge head; and circuitry configured to control the irradiation device to irradiate the recording medium. The circuitry is configured to set a first irradiation amount during the stop of conveyance to a larger value than a value of a second irradiation amount during the conveyance of the recording medium.
    Type: Application
    Filed: September 19, 2018
    Publication date: April 4, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Junji Nakai, Masafumi Yamada
  • Patent number: 10232641
    Abstract: A drying device includes: a dielectric heating unit configured to apply an alternating electrical field to a medium onto which a liquid containing a conductive material, water, and a solvent has been discharged, and perform dielectric heating of the liquid; and a conductive member disposed either to make contact with or to be close to the medium to which the alternating electrical field is being applied.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: March 19, 2019
    Assignee: Ricoh Company, Ltd.
    Inventor: Masafumi Yamada
  • Publication number: 20170266986
    Abstract: A drying device includes: a dielectric heating unit configured to apply an alternating electrical field to a medium onto which a liquid containing a conductive material, water, and a solvent has been discharged, and perform dielectric heating of the liquid; and a conductive member disposed either to make contact with or to be close to the medium to which the alternating electrical field is being applied.
    Type: Application
    Filed: March 15, 2017
    Publication date: September 21, 2017
    Inventor: Masafumi YAMADA
  • Patent number: 9550375
    Abstract: An inkjet image forming apparatus is provided. The inkjet image forming apparatus includes a recording unit, a selection heater, a heater, and a processor. The recording unit forms an ink image on a recording medium being conveyed. The selection heater is disposed downstream from the recording unit relative to a direction of conveyance of the recording medium, and selectively heats the ink image formed on the recording medium. The heater is disposed downstream from the selection heater relative to the direction of conveyance of the recording medium, and heats the recording medium on which the ink image has been selectively heated. The processor controls the recording unit, the selection heater, and the heater, and sets an output of the selection heater in view of an occurrence of cockling on the recording medium.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: January 24, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Masafumi Yamada, Takuma Nakamura, Tetsurou Sasamoto
  • Patent number: 9327524
    Abstract: A dryer for drying an ink image formed on a recording medium is provided. The dryer includes a selective heating dryer, a uniform heating dryer, and a controller. The selective heating dryer is disposed on an upstream side of a feeding path of the recording medium, and performs a first-time drying of the ink image under an output condition in which an amount of cockling becomes equal to or less than a given amount. The uniform heating dryer is disposed on a downstream side from the selective heating dryer on the feeding path, and performs a second-time drying of the ink image after the selective heating dryer performs the first-time drying. The controller changes the output condition of the selective heating dryer in accordance with image information of the ink image, when the ink image is formed with a conductive-particle-containing ink.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: May 3, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Masafumi Yamada, Takuma Nakamura, Tetsurou Sasamoto
  • Publication number: 20160114600
    Abstract: An inkjet image forming apparatus is provided. The inkjet image forming apparatus includes a recording unit, a selection heater, a heater, and a processor. The recording unit forms an ink image on a recording medium being conveyed. The selection heater is disposed downstream from the recording unit relative to a direction of conveyance of the recording medium, and selectively heats the ink image formed on the recording medium. The heater is disposed downstream from the selection heater relative to the direction of conveyance of the recording medium, and heats the recording medium on which the ink image has been selectively heated. The processor controls the recording unit, the selection heater, and the heater, and sets an output of the selection heater in view of an occurrence of cockling on the recording medium.
    Type: Application
    Filed: October 8, 2015
    Publication date: April 28, 2016
    Inventors: Masafumi YAMADA, Takuma NAKAMURA, Tetsurou SASAMOTO
  • Patent number: 8637152
    Abstract: Disclosed is a packaging material, wherein a barrier layer, an adhesive layer and a sealant layer are laminated in this order, and the adhesive layer includes an acid-modified polyolefin resin that contains a (meth)acrylic acid ester component. The packaging material is preferably produced by forming on the barrier layer the adhesive layer including the acid-modified polyolefin resin that contains a (meth)acrylic acid ester component, and by subsequently laminating a molten sealant resin on the adhesive layer by extrusion lamination.
    Type: Grant
    Filed: September 6, 2007
    Date of Patent: January 28, 2014
    Assignee: Unitika Ltd.
    Inventors: Kenjin Shiba, Takuma Yano, Masafumi Yamada, Takamasa Yoshino
  • Patent number: 8535774
    Abstract: Disclosed is a release sheet including a substrate and a resin layer formed on the substrate. The resin layer includes: 100 parts by mass of an acid-modified polyolefin resin including an acid-modifying component in a content of 1 to 10% by mass; and 1 to 50 parts by mass of a crosslinking agent and/or 5 to 1000 parts by mass of polyvinyl alcohol. The crosslinking agent is composed of a carbodiimide compound and/or an oxazoline compound.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: September 17, 2013
    Assignee: Unitika Ltd.
    Inventors: Nobuyasu Okumura, Masafumi Yamada, Kenjin Shiba