Patents by Inventor Koichi Ooishi
Koichi Ooishi 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).
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Publication number: 20230418212Abstract: A cartridge including: a first unit including an image bearing member and a first portion, and configured to take a removal posture when the cartridge is to be removed from a main body; a second unit including a developer bearing member and a second portion, the second unit being movable between a first position where the developer bearing member is in contact with the image bearing member and a second position where the developer bearing member is separated from the image bearing member and where the second portion is in contact with the first portion, wherein when the first unit takes the removal posture, the second unit is located at the second position, and when the second unit is located at the second position, movement of the second unit in a direction, in which the developer bearing member is separated from the image bearing member, is restricted.Type: ApplicationFiled: September 6, 2023Publication date: December 28, 2023Inventors: Toshiaki Takeuchi, Koichi Ooishi, Hiroki Shimizu
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Patent number: 11835888Abstract: A developing device includes a stirring member including a flexible sheet member having a first sheet portion and a second sheet portion overlapping each other with respect to a thickness direction of the sheet member. With respect to a lateral direction of the sheet member which is a direction from a fixed end fixed to a rotating shaft portion to the free end, a length of the first sheet portion is longer than a length of the second sheet portion, and when the stirring member is rotated, a free end of the first sheet portion is capable of contacting an inner wall surface of a toner accommodation chamber. The sheet member is provided with a through hole penetrating in a thickness direction of the sheet member in a region where the first sheet portion and the second sheet portion overlap each other.Type: GrantFiled: May 26, 2022Date of Patent: December 5, 2023Assignee: CANON KABUSHIKI KAISHAInventors: Harunobu Maeda, Masahito Kato, Kodai Hayashi, Takuya Oka, Yu Akiba, Masato Tanabe, Koichi Ooishi, Takatoshi Hamada, Yuichiro Hirata
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Patent number: 11789401Abstract: A cartridge including: a first unit including an image bearing member and a first portion, and configured to take a removal posture when the cartridge is to be removed from a main body; a second unit including a developer bearing member and a second portion, the second unit being movable between a first position where the developer bearing member is in contact with the image bearing member and a second position where the developer bearing member is separated from the image bearing member and where the second portion is in contact with the first portion, wherein when the first unit takes the removal posture, the second unit is located at the second position, and when the second unit is located at the second position, movement of the second unit in a direction, in which the developer bearing member is separated from the image bearing member, is restricted.Type: GrantFiled: September 30, 2022Date of Patent: October 17, 2023Assignee: CANON KABUSHIKI KAISHAInventors: Toshiaki Takeuchi, Koichi Ooishi, Hiroki Shimizu
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Publication number: 20230025390Abstract: A cartridge including: a first unit including an image bearing member and a first portion, and configured to take a removal posture when the cartridge is to be removed from a main body; a second unit including a developer bearing member and a second portion, the second unit being movable between a first position where the developer bearing member is in contact with the image bearing member and a second position where the developer bearing member is separated from the image bearing member and where the second portion is in contact with the first portion, wherein when the first unit takes the removal posture, the second unit is located at the second position, and when the second unit is located at the second position, movement of the second unit in a direction, in which the developer bearing member is separated from the image bearing member, is restricted.Type: ApplicationFiled: September 30, 2022Publication date: January 26, 2023Inventors: Toshiaki Takeuchi, Koichi Ooishi, Hiroki Shimizu
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Patent number: 11493878Abstract: A cartridge including: a first unit including an image bearing member and a first portion, and configured to take a removal posture when the cartridge is to be removed from a main body; a second unit including a developer bearing member and a second portion, the second unit being movable between a first position where the developer bearing member is in contact with the image bearing member and a second position where the developer bearing member is separated from the image bearing member and where the second portion is in contact with the first portion, wherein when the first unit takes the removal posture, the second unit is located at the second position, and when the second unit is located at the second position, movement of the second unit in a direction, in which the developer bearing member is separated from the image bearing member, is restricted.Type: GrantFiled: July 16, 2021Date of Patent: November 8, 2022Assignee: CANON KABUSHIKI KAISHAInventors: Toshiaki Takeuchi, Koichi Ooishi, Hiroki Shimizu
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Publication number: 20220283526Abstract: A developing device includes a frame having an accommodation chamber where a developer is accommodated, and a replenishing port replenishing a developer to the accommodation chamber from outside; and a stirring member stirring the developer in the accommodation chamber, the stirring member including a rotating shaft portion rotatably supported by the frame and a sheet member having one end fixed to the rotating shaft portion and another end as a free end and being rotatable with the rotating shaft portion. When the stirring member is rotated, the free end of the sheet member is capable of contacting an inner wall surface of the accommodation chamber in which the replenishing port is formed, and a through hole penetrating in a thickness direction of the sheet member is provided in a region of the sheet member that comes into contact with the inner wall surface of the accommodation chamber.Type: ApplicationFiled: May 26, 2022Publication date: September 8, 2022Inventors: Harunobu Maeda, Masahito Kato, Kodai Hayashi, Takuya Oka, Yu Akiba, Masato Tanabe, Koichi Ooishi, Takatoshi Hamada, Yuichiro Hirata
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Patent number: 11372348Abstract: A developing device includes a frame having an accommodation chamber where a developer is accommodated, and a replenishing port replenishing a developer to the accommodation chamber from outside, and a stirring member stirring the developer in the accommodation chamber. The stirring member includes a rotating shaft portion rotatably supported by the frame and a sheet member having one end fixed to the rotating shaft portion and another end as a free end and being rotatable with the rotating shaft portion. When the stirring member is rotated, the free end of the sheet member is capable of contacting an inner wall surface of the accommodation chamber in which the replenishing port is formed, and a through hole penetrating in a thickness direction of the sheet member is provided in a region of the sheet member that comes into contact with the inner wall surface of the accommodation chamber.Type: GrantFiled: September 10, 2020Date of Patent: June 28, 2022Assignee: CANON KABUSHIKI KAISHAInventors: Harunobu Maeda, Masahito Kato, Kodai Hayashi, Takuya Oka, Yu Akiba, Masato Tanabe, Koichi Ooishi, Takatoshi Hamada, Yuichiro Hirata
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Patent number: 11188021Abstract: A cartridge including: a first unit including an image bearing member and a first portion, and configured to take a removal posture when the cartridge is to be removed from a main body; a second unit including a developer bearing member and a second portion, the second unit being movable between a first position where the developer bearing member is in contact with the image bearing member and a second position where the developer bearing member is separated from the image bearing member and where the second portion is in contact with the first portion, wherein when the first unit takes the removal posture, the second unit is located at the second position, and when the second unit is located at the second position, movement of the second unit in a direction, in which the developer bearing member is separated from the image bearing member, is restricted.Type: GrantFiled: September 15, 2020Date of Patent: November 30, 2021Assignee: CANON KABUSHIKI KAISHAInventors: Toshiaki Takeuchi, Koichi Ooishi, Hiroki Shimizu
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Publication number: 20210341875Abstract: A cartridge including: a first unit including an image bearing member and a first portion, and configured to take a removal posture when the cartridge is to be removed from a main body; a second unit including a developer bearing member and a second portion, the second unit being movable between a first position where the developer bearing member is in contact with the image bearing member and a second position where the developer bearing member is separated from the image bearing member and where the second portion is in contact with the first portion, wherein when the first unit takes the removal posture, the second unit is located at the second position, and when the second unit is located at the second position, movement of the second unit in a direction, in which the developer bearing member is separated from the image bearing member, is restricted.Type: ApplicationFiled: July 16, 2021Publication date: November 4, 2021Inventors: Toshiaki Takeuchi, Koichi Ooishi, Hiroki Shimizu
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Publication number: 20210080870Abstract: A developing device includes a frame having an accommodation chamber where a developer is accommodated, and a replenishing port replenishing a developer to the accommodation chamber from outside; and a stirring member stirring the developer in the accommodation chamber, the stirring member including a rotating shaft portion rotatably supported by the frame and a sheet member having one end fixed to the rotating shaft portion and another end as a free end and being rotatable with the rotating shaft portion. When the stirring member is rotated, the free end of the sheet member is capable of contacting an inner wall surface of the accommodation chamber in which the replenishing port is formed, and a through hole penetrating in a thickness direction of the sheet member is provided in a region of the sheet member that comes into contact with the inner wall surface of the accommodation chamber.Type: ApplicationFiled: September 10, 2020Publication date: March 18, 2021Inventors: Harunobu Maeda, Masahito Kato, Kodai Hayashi, Takuya Oka, Yu Akiba, Masato Tanabe, Koichi Ooishi, Takatoshi Hamada, Yuichiro Hirata
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Publication number: 20210080898Abstract: A cartridge including: a first unit including an image bearing member and a first portion, and configured to take a removal posture when the cartridge is to be removed from a main body; a second unit including a developer bearing member and a second portion, the second unit being movable between a first position where the developer bearing member is in contact with the image bearing member and a second position where the developer bearing member is separated from the image bearing member and where the second portion is in contact with the first portion, wherein when the first unit takes the removal posture, the second unit is located at the second position, and when the second unit is located at the second position, movement of the second unit in a direction, in which the developer bearing member is separated from the image bearing member, is restricted.Type: ApplicationFiled: September 15, 2020Publication date: March 18, 2021Inventors: Toshiaki Takeuchi, Koichi Ooishi, Hiroki Shimizu
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Patent number: 10928751Abstract: A remanufacturing method of a developing apparatus including: a communicating step of removing a part of a frame of the developing apparatus to form a communication hole such that an outside of the frame and a developing chamber of the frame are connected each other; a refilling step of refilling an inside of the frame with developer via the communication hole; and a sealing step of sealing the communication hole.Type: GrantFiled: August 27, 2019Date of Patent: February 23, 2021Assignee: Canon Kabushiki KaishaInventors: Yu Akiba, Toshiaki Takeuchi, Koichi Ooishi, Naoya Asanuma
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Publication number: 20200073288Abstract: A remanufacturing method for remanufacturing a second developing device from a first developing device, the first developing device including a frame provided with a developer accommodating chamber for accommodating a developer, the frame having an opening for communicating the developer accommodating chamber with the outside of the frame; and a first cap member configured to seal the opening, the first cap member being adhesively bonded to a first region of the frame with a first adhesive capable of dissolving the frame, and the remanufacturing method including: removing the first cap member from the first region such that a rough surface is formed in the first region; filling the developer accommodating chamber with the developer; and bonding a second cap member different from the first cap member to a second region of the frame different from the first region to seal the opening with the second cap member.Type: ApplicationFiled: August 27, 2019Publication date: March 5, 2020Inventors: Shota Nakamura, Takuya Kawakami, Takatoshi Hamada, Koichi Ooishi, Naoya Asanuma, Yohei Kusano
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Publication number: 20200073287Abstract: A remanufacturing method of a developing apparatus including: a communicating step of removing a part of a frame of the developing apparatus to form a communication hole such that an outside of the frame and a developing chamber of the frame are connected each other; a refilling step of refilling an inside of the frame with developer via the communication hole; and a sealing step of sealing the communication hole.Type: ApplicationFiled: August 27, 2019Publication date: March 5, 2020Inventors: Yu Akiba, Toshiaki Takeuchi, Koichi Ooishi, Naoya Asanuma