Patents by Inventor Toshiaki Takeuchi
Toshiaki Takeuchi 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: 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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Patent number: 11042117Abstract: A rotational force is transmitted to a main assembly side feeding member for feeding the toner into a main assembly side toner accommodating portion from a coupling member provided on a cartridge. The cartridge includes a photosensitive drum, a discharge opening configured to discharge the toner removed from the photosensitive drum toward the main assembly side feeding member, and a coupling member configured to transmit the rotational force to the main assembly side feeding member. The coupling member is movable between a first position for transmitting the rotational force to the main assembly side feeding member and a second position retracted from the first position.Type: GrantFiled: February 28, 2020Date of Patent: June 22, 2021Assignee: Canon Kabushiki KaishaInventors: Akinobu Hirayama, Takahito Ueno, Toshiaki Takeuchi
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Patent number: 11036179Abstract: A cartridge comprises a frame including a chamber, a photosensitive drum supported by the frame, a first coupling member operatively connected to the photosensitive drum such that a rotational force can be transmitted from the first coupling member to the photosensitive drum, and a second coupling member provided adjacent to an opening in the cartridge. The chamber is in fluid communication with the opening, with the second coupling member forming at least a part of the passageway through which toner can move from the chamber to the opening.Type: GrantFiled: February 28, 2020Date of Patent: June 15, 2021Assignee: Canon Kabushiki KaishaInventors: Akinobu Hirayama, Takahito Ueno, Toshiaki Takeuchi
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Patent number: 11022933Abstract: A process cartridge includes a seal member contacting an image bearing member upstream in the rotation direction of the image bearing member from a cleaning member and allowing the developer to move from upstream in the rotation direction from the contact part between the seal member and the image bearing to downstream from the contact part while regulating movement from downstream to upstream from the contact part. The developer has surface protrusions containing an organic silicon polymer, wherein either (i) the work function of the seal member is greater than the work function of the developer when the developer has a negative charging polarity and is smaller than the work function of the developer when the developer has a positive charging polarity, or (ii) the absolute value of the difference between the work function of the seal member and the work function of the developer is within a predetermined range.Type: GrantFiled: May 15, 2020Date of Patent: June 1, 2021Assignee: CANON KABUSHI KIKAISHAInventors: Kazunori Hashimoto, Katsuhiro Kojima, Toshiaki Takeuchi, Yasukazu Ikami, Kosuke Ikada, Yoshihiro Mitsui, Yuichiro Hirata, Go Shindo, Akinobu Saito, Yuhei Terui, Noriyoshi Umeda, Tomonori Matsunaga, Shohei Kototani, Masamichi Sato
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Patent number: 10976697Abstract: A cartridge comprises a frame including a chamber, a photosensitive drum supported by the frame, a first coupling member operatively connected to the photosensitive drum such that a rotational force can be transmitted from the first coupling member to the photosensitive drum, and a second coupling member provided adjacent to an opening in the cartridge. The chamber is in fluid communication with the opening, with the second coupling member forming at least a part of the passageway through which toner can move from the chamber to the opening.Type: GrantFiled: February 28, 2020Date of Patent: April 13, 2021Assignee: Canon Kabushiki KaishaInventors: Akinobu Hirayama, Takahito Ueno, Toshiaki Takeuchi
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Patent number: 10976698Abstract: A rotational force is transmitted to a main assembly side feeding member for feeding the toner into a main assembly side toner accommodating portion from a coupling member provided on a cartridge. The cartridge includes a photosensitive drum, a discharge opening configured to discharge the toner removed from the photosensitive drum toward the main assembly side feeding member, and a coupling member configured to transmit the rotational force to the main assembly side feeding member. The coupling member is movable between a first position for transmitting the rotational force to the main assembly side feeding member and a second position retracted from the first position.Type: GrantFiled: February 28, 2020Date of Patent: April 13, 2021Assignee: Canon Kabushiki KaishaInventors: Akinobu Hirayama, Takahito Ueno, Toshiaki Takeuchi
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Patent number: 10969733Abstract: A rotational force is transmitted to a main assembly side feeding member for feeding the toner into a main assembly side toner accommodating portion from a coupling member provided on a cartridge. The cartridge includes a photosensitive drum, a discharge opening configured to discharge the toner removed from the photosensitive drum toward the main assembly side feeding member, and a coupling member configured to transmit the rotational force to the main assembly side feeding member. The coupling member is movable between a first position for transmitting the rotational force to the main assembly side feeding member and a second position retracted from the first position.Type: GrantFiled: February 28, 2020Date of Patent: April 6, 2021Assignee: Canon Kabushiki KaishaInventors: Akinobu Hirayama, Takahito Ueno, Toshiaki Takeuchi
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Patent number: 10969734Abstract: A rotational force is transmitted to a main assembly side feeding member for feeding the toner into a main assembly side toner accommodating portion from a coupling member provided on a cartridge. The cartridge includes a photosensitive drum, a discharge opening configured to discharge the toner removed from the photosensitive drum toward the main assembly side feeding member, and a coupling member configured to transmit the rotational force to the main assembly side feeding member. The coupling member is movable between a first position for transmitting the rotational force to the main assembly side feeding member and a second position retracted from the first position.Type: GrantFiled: February 28, 2020Date of Patent: April 6, 2021Assignee: Canon Kabushiki KaishaInventors: Akinobu Hirayama, Takahito Ueno, Toshiaki Takeuchi
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Patent number: 10962926Abstract: A rotational force is transmitted to a main assembly side feeding member for feeding the toner into a main assembly side toner accommodating portion from a coupling member provided on a cartridge. The cartridge includes a photosensitive drum, a discharge opening configured to discharge the toner removed from the photosensitive drum toward the main assembly side feeding member, and a coupling member configured to transmit the rotational force to the main assembly side feeding member. The coupling member is movable between a first position for transmitting the rotational force to the main assembly side feeding member and a second position retracted from the first position.Type: GrantFiled: February 28, 2020Date of Patent: March 30, 2021Assignee: Canon Kabushiki KaishaInventors: Akinobu Hirayama, Takahito Ueno, Toshiaki Takeuchi
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Patent number: 10955795Abstract: A rotational force is transmitted to a main assembly side feeding member for feeding the toner into a main assembly side toner accommodating portion from a coupling member provided on a cartridge. The cartridge includes a photosensitive drum, a discharge opening configured to discharge the toner removed from the photosensitive drum toward the main assembly side feeding member, and a coupling member configured to transmit the rotational force to the main assembly side feeding member. The coupling member is movable between a first position for transmitting the rotational force to the main assembly side feeding member and a second position retracted from the first position.Type: GrantFiled: February 28, 2020Date of Patent: March 23, 2021Assignee: Canon Kabushiki KaishaInventors: Akinobu Hirayama, Takahito Ueno, Toshiaki Takeuchi
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Publication number: 20210080862Abstract: Provided is an image forming unit including a photosensitive unit including an image bearing member, a developing unit including a developer bearing member and a container capable of containing a developer, a rotation shaft, the developing unit being rotated around the rotation shaft and positioned at one of a development position where the developer bearing member supplies the developer to the image bearing member and a separation position where the developer bearing member separates from the image bearing member, and a sensing portion sensing a variation or an amount corresponding to an amount of the developer contained in the developing unit. The rotation shaft is located below a developing portion, which is formed of the image bearing member and the developer bearing member, in a gravity direction.Type: ApplicationFiled: September 16, 2020Publication date: March 18, 2021Inventors: Yohei Kusano, Hiroki Shimizu, Toshiaki Takeuchi, Hideki Kakuta
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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: 10935926Abstract: A technique enabling downsizing of an image forming apparatus is provided. A cleaning unit 13 attachable to and detachable from an apparatus main body of an image forming apparatus 100 that forms an image on a recording material 12 is provided, with this cleaning unit 13 including: a photosensitive drum 1; and a cleaning frame body 14 that supports the photosensitive drum 1 and that includes an opening 14c through which laser light 3c for exposing the photosensitive drum 1 can pass, wherein the opening 14c is configured such that a width of the opening 14c in a scanning direction in an irradiation range of the light for exposing the photosensitive drum 1 becomes greater toward a side of the photosensitive drum 1 from a side of a light source of light for exposing the photosensitive drum 1.Type: GrantFiled: February 5, 2020Date of Patent: March 2, 2021Assignee: Canon Kabushiki KaishaInventors: Toshiaki Takeuchi, Takahito Ueno, Yuuki Nakamura, Kensuke Suzuki
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Patent number: 10935927Abstract: A cartridge comprises a frame including a chamber, a photosensitive drum supported by the frame, a first coupling member operatively connected to the photosensitive drum such that a rotational force can be transmitted from the first coupling member to the photosensitive drum, and a second coupling member provided adjacent to an opening in the cartridge. The chamber is in fluid communication with the opening, with the second coupling member forming at least a part of the passageway through which toner can move from the chamber to the opening.Type: GrantFiled: February 28, 2020Date of Patent: March 2, 2021Assignee: Canon Kabushiki KaishaInventors: Akinobu Hirayama, Takahito Ueno, Toshiaki Takeuchi
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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: 20210041829Abstract: A cartridge includes a photosensitive drum and a discharge opening for permitting discharge of toner removed from the photosensitive drum to outside of the cartridge. The cartridge also includes a coupling member provided adjacent to the discharge opening and configured to output a rotational force, with the coupling member being movable relative to the photosensitive drum between (i) a first position and (ii) a second position retracted from the first position.Type: ApplicationFiled: October 28, 2020Publication date: February 11, 2021Inventors: Akinobu Hirayama, Takahito Ueno, Toshiaki Takeuchi
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Patent number: 10884374Abstract: A rotational force is transmitted to a main assembly side feeding member for feeding the toner into a main assembly side toner accommodating portion from a coupling member provided on a cartridge. The cartridge includes a photosensitive drum, a discharge opening configured to discharge the toner removed from the photosensitive drum toward the main assembly side feeding member, and a coupling member configured to transmit the rotational force to the main assembly side feeding member. The coupling member is movable between a first position for transmitting the rotational force to the main assembly side feeding member and a second position retracted from the first position.Type: GrantFiled: February 28, 2020Date of Patent: January 5, 2021Assignee: Canon Kabushiki KaishaInventors: Akinobu Hirayama, Takahito Ueno, Toshiaki Takeuchi
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Publication number: 20200363768Abstract: A process cartridge includes a seal member contacting an image bearing member upstream in the rotation direction of the image bearing member from a cleaning member and allowing the developer to move from upstream in the rotation direction from the contact part between the seal member and the image bearing to downstream from the contact part while regulating movement from downstream to upstream from the contact part. The developer has surface protrusions containing an organic silicon polymer, wherein either (i) the work function of the seal member is greater than the work function of the developer when the developer has a negative charging polarity and is smaller than the work function of the developer when the developer has a positive charging polarity, or (ii) the absolute value of the difference between the work function of the seal member and the work function of the developer is within a predetermined range.Type: ApplicationFiled: May 15, 2020Publication date: November 19, 2020Inventors: Kazunori Hashimoto, Katsuhiro Kojima, Toshiaki Takeuchi, Yasukazu Ikami, Kosuke Ikada, Yoshihiro Mitsui, Yuichiro Hirata, Go Shindo, Akinobu Saito, Yuhei Terui, Noriyoshi Umeda, Tomonori Matsunaga, Shohei Kototani, Masamichi Sato
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Patent number: D907111Type: GrantFiled: December 5, 2018Date of Patent: January 5, 2021Assignee: Canon Kabushiki KaishaInventors: Yuuki Nakamura, Toshiaki Takeuchi
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Patent number: D907112Type: GrantFiled: December 5, 2018Date of Patent: January 5, 2021Assignee: Canon Kabushiki KaishaInventors: Toshiaki Takeuchi, Yuuki Nakamura