Patents by Inventor Yuta YABUTA

Yuta YABUTA 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).

  • Filter holding device, developing device, process cartridge, image forming apparatus, and filter
    Patent number: 11880160
    Abstract: A filter holding device includes an opening portion and a filter. The opening portion communicates an inside of the filter holding device with an outside of the filter holding device. The filter includes a first side and a second side. The first side faces the inside of the filter holding device. The second side faces the outside of the filter holding device. The filter has a lower weight density per unit volume at the first side than at the second side. At least a side face of the first side of the filter is covered with an air-impermeable member. The side face is a lateral face of the filter at the first side.
    Type: Grant
    Filed: October 6, 2021
    Date of Patent: January 23, 2024
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hotaru Hashikawa, Tatsuya Kubo, Kazuki Yogosawa, Yuta Yabuta, Takuya Suganuma
  • FILTER HOLDING DEVICE, DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS
    Publication number: 20230330582
    Abstract: A filter holding device includes an opening portion and a filter. The opening portion communicates an inside of the filter holding device with an outside of the filter holding device, and has a rim that extends in a communication direction from the inside of the filter holding device toward the outside of the filter holding device. The filter is disposed in the opening portion, and has a first side and a second side. The first side faces the inside of the filter holding device. The second side faces the outside of the filter holding device. The filter has a larger weight density per unit volume at the second side facing the outside of the filter holding device than at the first side facing the inside of the filter holding device in a state in which the filter is disposed in the opening portion.
    Type: Application
    Filed: September 22, 2021
    Publication date: October 19, 2023
    Inventors: Yuta YABUTA, Kazuki YOGOSAWA, Tatsuya KUBO, Takuya SUGANUMA, Hotaru HASHIKAWA, Yoshihiro FUJIWARA
  • FILTER HOLDING DEVICE, DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS
    Publication number: 20220395771
    Abstract: A filter holding device includes an opening portion and a filter. The opening portion communicates between an inside and an outside of the filter holding device. The filter is disposed in the opening portion and includes a first side and a second side. The first side is located adjacent to the inside of the filter holding device. The second side is located adjacent to the outside of the filter holding device. The filter has a larger weight density per unit volume at the second side than a weight density per unit volume at the first side and has a larger area of a surface intersecting a communication direction at the second side than an area of a surface intersecting the communication direction at the first side.
    Type: Application
    Filed: June 2, 2022
    Publication date: December 15, 2022
    Inventors: Shohtaroh HOSHI, Kazuki YOGOSAWA, Tatsuya KUBO, Yuta YABUTA, Hotaru HASHIKAWA, Takuya SUGANUMA, Takuya SEKINE, Tatsumi YAMADA
  • FILTER, FILTER HOLDING DEVICE, DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS
    Publication number: 20220121138
    Abstract: A filter includes a sticker and a filter body. The filter body has a smaller weight density per unit volume at a first side than at a second side opposite the first side. The sticker is disposed around a surface of the second side of the filter body.
    Type: Application
    Filed: October 11, 2021
    Publication date: April 21, 2022
    Inventors: Tatsumi YAMADA, Takuya SUGANUMA, Takuya SEKINE, Shotaro HOSHI, Kazuki YOGOSAWA, Yuta YABUTA, Tatsuya KUBO, Hotaru HASHIKAWA
  • FILTER HOLDING DEVICE, DEVELOPING DEVICE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND FILTER
    Publication number: 20220107605
    Abstract: A filter holding device includes an opening portion and a filter. The opening portion communicates an inside of the filter holding device with an outside of the filter holding device. The filter includes a first side and a second side. The first side faces the inside of the filter holding device. The second side faces the outside of the filter holding device. The filter has a lower weight density per unit volume at the first side than at the second side. At least a side face of the first side of the filter is covered with an air-impermeable member. The side face is a lateral face of the filter at the first side.
    Type: Application
    Filed: October 6, 2021
    Publication date: April 7, 2022
    Inventors: Hotaru HASHIKAWA, Tatsuya KUBO, Kazuki YOGOSAWA, Yuta YABUTA, Takuya SUGANUMA