Patents by Inventor Katsuichi Abe
Katsuichi Abe 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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Patent number: 11829087Abstract: An image forming apparatus includes a first image forming portion, a second image forming portion, a belt, a charging voltage applying portion, and a transfer voltage applying portion. With respect to a movement direction of a recording material, the first image forming portion is provided upstream of the second image forming portion. In an image forming operation, a potential difference between a first transfer voltage and a potential at a first transfer portion, which is formed on a first image bearing member and does not form the image, is greater than a potential difference between a second transfer voltage and a potential at a second transfer portion, which is formed on a second image bearing member and does not form an image.Type: GrantFiled: November 18, 2022Date of Patent: November 28, 2023Assignee: Canon Kabushiki KaishaInventors: Hiroki Tanaka, Satoru Motohashi, Nobuo Oshima, Akihisa Matsukawa, Katsuichi Abe, Takayuki Namiki
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Publication number: 20230078948Abstract: An image forming apparatus includes a first image forming portion, a second image forming portion, a belt, a charging voltage applying portion, and a transfer voltage applying portion. With respect to a movement direction of a recording material, the first image forming portion is provided upstream of the second image forming portion. In an image forming operation, a potential difference between a first transfer voltage and a potential at a first transfer portion, which is formed on a first image bearing member and does not form the image, is greater than a potential difference between a second transfer voltage and a potential at a second transfer portion, which is formed on a second image bearing member and does not form an image.Type: ApplicationFiled: November 18, 2022Publication date: March 16, 2023Inventors: Hiroki Tanaka, Satoru Motohashi, Nobuo Oshima, Akihisa Matsukawa, Katsuichi Abe, Takayuki Namiki
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Patent number: 11526103Abstract: An image forming apparatus includes a first image forming portion, a second image forming portion, a belt, a charging voltage applying portion, and a transfer voltage applying portion. With respect to a movement direction of a recording material, the first image forming portion is provided upstream of the second image forming portion. In an image forming operation, a potential difference between a first transfer voltage and a potential at a first transfer portion, which is formed on a first image bearing member and does not form the image, is greater than a potential difference between a second transfer voltage and a potential at a second transfer portion, which is formed on a second image bearing member and does not form an image.Type: GrantFiled: November 15, 2021Date of Patent: December 13, 2022Assignee: Canon Kabushiki KaishaInventors: Hiroki Tanaka, Satoru Motohashi, Nobuo Oshima, Akihisa Matsukawa, Katsuichi Abe, Takayuki Namiki
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Publication number: 20220206415Abstract: An image forming apparatus includes a first image forming portion, a second image forming portion, a belt, a charging voltage applying portion, and a transfer voltage applying portion. With respect to a movement direction of the recording material, the first image forming portion is provided upstream of the second image forming portion. In an image forming operation, a potential difference between the first transfer voltage and a potential, at the first transfer portion, which is formed on the first image bearing member and does not form the image is larger than a potential difference between the second transfer voltage and a potential, at the second transfer portion, which is formed on the second image bearing member and does not form the image.Type: ApplicationFiled: November 15, 2021Publication date: June 30, 2022Inventors: Hiroki Tanaka, Satoru Motohashi, Nobuo Oshima, Akihisa Matsukawa, Katsuichi Abe, Takayuki Namiki
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Patent number: 11300896Abstract: An image forming apparatus includes a main assembly, a first cartridge including an image bearing member, a second cartridge including a developing member, a developer supplying member provided in the second cartridge, and a controller for changing a polarity of a developer supply amount control bias which is a difference between the developing bias and the developer supplying bias depending on a print ratio based on an inputted image data. The controller changes the polarity of the developer supply amount control bias depending on at least one of a use history of the first cartridge and a use history of the second cartridge and on the print ratio.Type: GrantFiled: February 19, 2021Date of Patent: April 12, 2022Assignee: Canon Kabushiki KaishaInventors: Katsuichi Abe, Masataka Mochizuki
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Patent number: 11106169Abstract: An image forming apparatus having a first mode and a second mode with respectively different rotational peripheral velocity ratios of a developer bearing member, stores a first lifetime threshold value of a developing apparatus corresponding to the first mode and a second lifetime threshold value of the developing apparatus corresponding to the second mode, updates a lifetime determination value of a developing apparatus on the basis of drive amount information when the developer bearing member operates in the first mode and second modes, performs a first determination related to a lifetime in the first mode on the basis of the first lifetime threshold value and the lifetime determination value, performs a second determination related to a lifetime in the second mode on the basis of the second lifetime threshold value and the lifetime determination value, and makes a notification on the basis of determination results.Type: GrantFiled: January 3, 2020Date of Patent: August 31, 2021Assignee: CANON KABUSHIKI KAISHAInventors: Masataka Mochizuki, Katsuichi Abe
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Publication number: 20210263439Abstract: An image forming apparatus includes a main assembly, a first cartridge including an image bearing member, a second cartridge including a developing member, a developer supplying member provided in the second cartridge, and a controller for changing a polarity of a developer supply amount control bias which is a difference between the developing bias and the developer supplying bias depending on a print ratio based on an inputted image data. The controller changes the polarity of the developer supply amount control bias depending on at least one of a use history of the first cartridge and a use history of the second cartridge and on the print ratio.Type: ApplicationFiled: February 19, 2021Publication date: August 26, 2021Inventors: Katsuichi Abe, Masataka Mochizuki
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Patent number: 10852660Abstract: An image forming apparatus includes a regulating member that regulates a developing agent that a developing agent carrying member carries in order to develop an electrostatic image, and a regulatory bias application portion that applies a regulatory bias to the regulating member, wherein the developing agent includes a toner containing a toner particle, inorganic silicon fine particles present on the surface of the toner particle, and a metal soap, wherein the amount of water-washing migration of the inorganic silicon fine particles is 0.20 mass % or less, wherein a peripheral speed ratio, which is a ratio of a peripheral speed of the developing agent carrying member to a peripheral speed of an image bearing member, has a range of 120% to 300%, and a dark portion potential Vd on the surface of the image bearing member and a regulatory bias Vb satisfy the relationship of Vd<Vb.Type: GrantFiled: November 7, 2019Date of Patent: December 1, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Kosuke Ikada, Katsuichi Abe, Kodai Hayashi, Yasukazu Ikami, Shinichi Hagiwara, Shuhei Kawasaki
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Patent number: 10802419Abstract: A method of manufacturing a developer container including a frame configured to define a developer containing portion, a first electrode, and a second electrode arranged on a surface of the frame and having a surface opposed to the first electrode, a developer amount in the developer containing portion being detected based on a capacitance between the first electrode and the second electrode, the method including: holding a conductive resin member constituting the second electrode on a mold configured to mold the frame, a surface of the conductive resin member being in contact with a surface of the mold configured to mold a surface of the frame on a side of the developer containing portion; injecting a resin to be formed into the frame, into the mold on which the conductive resin member is held; and curing the resin to form the frame to which the second electrode is fixed.Type: GrantFiled: April 18, 2018Date of Patent: October 13, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Taku Watanabe, Masahito Kato, Go Shindo, Atsushi Toda, Katsuichi Abe, Motonari Ito, Akira Suzuki, Junichi Matsumura, Naoki Matsumaru
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Publication number: 20200218173Abstract: An image forming apparatus having a first mode and a second mode with respectively different rotational peripheral velocity ratios of a developer bearing member, stores a first lifetime threshold value of a developing apparatus corresponding to the first mode and a second lifetime threshold value of the developing apparatus corresponding to the second mode, updates a lifetime determination value of a developing apparatus on the basis of drive amount information when the developer bearing member operates in the first mode and second modes, performs a first determination related to a lifetime in the first mode on the basis of the first lifetime threshold value and the lifetime determination value, performs a second determination related to a lifetime in the second mode on the basis of the second lifetime threshold value and the lifetime determination value, and makes a notification on the basis of determination results.Type: ApplicationFiled: January 3, 2020Publication date: July 9, 2020Inventors: Masataka Mochizuki, Katsuichi Abe
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Publication number: 20200150555Abstract: An image forming apparatus includes a regulating member that regulates a developing agent that a developing agent carrying member carries in order to develop an electrostatic image, and a regulatory bias application portion that applies a regulatory bias to the regulating member, wherein the developing agent includes a toner containing a toner particle, inorganic silicon fine particles present on the surface of the toner particle, and a metal soap, wherein the amount of water-washing migration of the inorganic silicon fine particles is 0.20 mass % or less, wherein a peripheral speed ratio, which is a ratio of a peripheral speed of the developing agent carrying member to a peripheral speed of an image bearing member, has a range of 120% to 300%, and a dark portion potential Vd on the surface of the image bearing member and a regulatory bias Vb satisfy the relationship of Vd<Vb.Type: ApplicationFiled: November 7, 2019Publication date: May 14, 2020Inventors: Kosuke Ikada, Katsuichi Abe, Kodai Hayashi, Yasukazu Ikami, Shinichi Hagiwara, Shuhei Kawasaki
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Patent number: 10520859Abstract: A control portion executes: a step of calculating a surface potential of an image bearing member charged by a charging member, to which a predetermined voltage is applied, and exposed to light by a predetermined exposure amount on the basis of a discharge start voltage between a measurement member and the image bearing member and calculating a correction value from a difference between a target value and calculated surface potential of the image bearing member; a step of correcting calculated surface potential of the image bearing member on the basis of the correction value; and a step of controlling at least one of the voltage applied to the charging member and an exposure amount of the exposure apparatus on the basis of the corrected surface potential of the image bearing member so that the surface potential of the image bearing member reaches the target value.Type: GrantFiled: June 29, 2017Date of Patent: December 31, 2019Assignee: Canon Kabushiki KaishaInventors: Katsuichi Abe, Kazumi Yamauchi, Naoki Fukushima
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Patent number: 10228635Abstract: A developer container includes: a housing chamber 147 which includes an opening 145 and which houses developer; a stirring member 160 which includes a sheet-like stirring portion 160b and a rotary shaft 160a to which the stirring portion 160b is attached; and a first electrode 143 and a second electrode 144 which are used to detect an amount of the developer and which are arranged with an interval therebetween, wherein an area X1 between the first electrode 143 and the second electrode 144 in the housing chamber 147 is positioned below the rotary shaft 160a of the stirring member 160, and the sheet-like stirring portion 160b comes into contact with the area X1 due to rotation of the stirring member 160.Type: GrantFiled: November 28, 2017Date of Patent: March 12, 2019Assignee: Canon Kabushiki KaishaInventors: Masahito Kato, Kenta Shibukawa, Kazumi Yamauchi, Katsuichi Abe, Naoya Asanuma, Atsushi Toda, Yosuke Kishi, Naoki Fukushima
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Publication number: 20180239276Abstract: A method of manufacturing a developer container including a frame configured to define a developer containing portion, a first electrode, and a second electrode arranged on a surface of the frame and having a surface opposed to the first electrode, a developer amount in the developer containing portion being detected based on a capacitance between the first electrode and the second electrode, the method including: holding a conductive resin member constituting the second electrode on a mold configured to mold the frame, a surface of the conductive resin member being in contact with a surface of the mold configured to mold a surface of the frame on a side of the developer containing portion; injecting a resin to be formed into the frame, into the mold on which the conductive resin member is held; and curing the resin to form the frame to which the second electrode is fixed.Type: ApplicationFiled: April 18, 2018Publication date: August 23, 2018Inventors: Taku Watanabe, Masahito Kato, Go Shindo, Atsushi Toda, Katsuichi Abe, Motonari Ito, Akira Suzuki, Junichi Matsumura, Naoki Matsumaru
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Patent number: 9989888Abstract: A method of manufacturing a developer container including a frame configured to define a developer containing portion, a first electrode, and a second electrode arranged on a surface of the frame and having a surface opposed to the first electrode, a developer amount in the developer containing portion being detected based on a capacitance between the first electrode and the second electrode, the method including: holding a conductive resin member constituting the second electrode on a mold configured to mold the frame, a surface of the conductive resin member being in contact with a surface of the mold configured to mold a surface of the frame on a side of the developer containing portion; injecting a resin to be formed into the frame, into the mold on which the conductive resin member is held; and curing the resin to form the frame to which the second electrode is fixed.Type: GrantFiled: December 3, 2015Date of Patent: June 5, 2018Assignee: CANON KABUSHIKI KAISHAInventors: Taku Watanabe, Masahito Kato, Go Shindo, Atsushi Toda, Katsuichi Abe, Motonari Ito, Akira Suzuki, Junichi Matsumura, Naoki Matsumaru
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Publication number: 20180081300Abstract: A developer container includes: a housing chamber 147 which includes an opening 145 and which houses developer; a stirring member 160 which includes a sheet-like stirring portion 160b and a rotary shaft 160a to which the stirring portion 160b is attached; and a first electrode 143 and a second electrode 144 which are used to detect an amount of the developer and which are arranged with an interval therebetween, wherein an area X1 between the first electrode 143 and the second electrode 144 in the housing chamber 147 is positioned below the rotary shaft 160a of the stirring member 160, and the sheet-like stirring portion 160b comes into contact with the area X1 due to rotation of the stirring member 160.Type: ApplicationFiled: November 28, 2017Publication date: March 22, 2018Inventors: Masahito Kato, Kenta Shibukawa, Kazumi Yamauchi, Katsuichi Abe, Naoya Asanuma, Atsushi Toda, Yosuke Kishi, Naoki Fukushima
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Publication number: 20180011427Abstract: A control portion executes: a step of calculating a surface potential of an image bearing member charged by a charging member, to which a predetermined voltage is applied, and exposed to light by a predetermined exposure amount on the basis of a discharge start voltage between a measurement member and the image bearing member and calculating a correction value from a difference between a target value and calculated surface potential of the image bearing member; a step of correcting calculated surface potential of the image bearing member on the basis of the correction value; and a step of controlling at least one of the voltage applied to the charging member and an exposure amount of the exposure apparatus on the basis of the corrected surface potential of the image bearing member so that the surface potential of the image bearing member reaches the target value.Type: ApplicationFiled: June 29, 2017Publication date: January 11, 2018Inventors: Katsuichi Abe, Kazumi Yamauchi, Naoki Fukushima
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Patent number: 9857730Abstract: A developer container includes: a housing chamber 147 which includes an opening 145 and which houses developer; a stirring member 160 which includes a sheet-like stirring portion 160b and a rotary shaft 160a to which the stirring portion 160b is attached; and a first electrode 143 and a second electrode 144 which are used to detect an amount of the developer and which are arranged with an interval therebetween, where in an area X1 between the first electrode 143 and the second electrode 144 in the housing chamber 147 is positioned below the rotary shaft 160a of the stirring member 160, and the sheet-like stirring portion 160b comes into contact with the area X1 due to rotation of the stirring member 160.Type: GrantFiled: January 27, 2016Date of Patent: January 2, 2018Assignee: Canon Kabushiki KaishaInventors: Masahito Kato, Kenta Shibukawa, Kazumi Yamauchi, Katsuichi Abe, Naoya Asanuma, Atsushi Toda, Yosuke Kishi, Naoki Fukushima
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Patent number: 9857724Abstract: A relationship between a light amount of an exposure portion and a surface potential according to a use amount, a first detection light amount corresponding to a prescribed surface potential in the relationship where a use amount of a photosensitive member is a first use amount and a second detection light amount corresponding to the prescribed surface potential in the relationship where the use amount of the photosensitive member is a second use amount, which is greater than the first use amount, are acquired. The exposure portion changes, as an electrostatic image forming light amount, a first image forming light amount representing a setting value under the first use amount to a second image forming light amount representing a setting value under the second use amount on the basis of a ratio of the first detection light amount to the second detection light amount.Type: GrantFiled: August 24, 2016Date of Patent: January 2, 2018Assignee: CANON KABUSHIKI KAISHAInventors: Kazumi Yamauchi, Katsuichi Abe, Taku Watanabe
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Publication number: 20170060018Abstract: A relationship between a light amount of an exposure portion and a surface potential according to a use amount, a first detection light amount corresponding to a prescribed surface potential in the relationship where a use amount of a photosensitive member is a first use amount and a second detection light amount corresponding to the prescribed surface potential in the relationship where the use amount of the photosensitive member is a second use amount, which is greater than the first use amount, are acquired. The exposure portion changes, as an electrostatic image forming light amount, a first image forming light amount representing a setting value under the first use amount to a second image forming light amount representing a setting value under the second use amount on the basis of a ratio of the first detection light amount to the second detection light amount.Type: ApplicationFiled: August 24, 2016Publication date: March 2, 2017Inventors: Kazumi Yamauchi, Katsuichi Abe, Taku Watanabe