Patents by Inventor Norihito Naito
Norihito Naito 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: 20160320722Abstract: When an edge effect or sweeping occurs in a developing material, pixels, among a plurality of pixels that configure image data, will arise in which a developing material consumption amount rises beyond an original consumption amount. A CPU corrects the developing material consumption amount for the pixels, among the plurality of pixels that configure the image data, in which the developing material consumption amount will rise beyond the original consumption amount.Type: ApplicationFiled: July 8, 2016Publication date: November 3, 2016Inventors: Go Araki, Norihito Naito
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Patent number: 9417579Abstract: When an edge effect or sweeping occurs in a developing material, pixels, among a plurality of pixels that configure image data, will arise in which a developing material consumption amount rises beyond an original consumption amount. A CPU corrects the developing material consumption amount for the pixels, among the plurality of pixels that configure the image data, in which the developing material consumption amount will rise beyond the original consumption amount.Type: GrantFiled: February 4, 2016Date of Patent: August 16, 2016Assignee: Canon Kabushiki KaishaInventors: Go Araki, Norihito Naito
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Publication number: 20160154355Abstract: When an edge effect or sweeping occurs in a developing material, pixels, among a plurality of pixels that configure image data, will arise in which a developing material consumption amount rises beyond an original consumption amount. A CPU corrects the developing material consumption amount for the pixels, among the plurality of pixels that configure the image data, in which the developing material consumption amount will rise beyond the original consumption amount.Type: ApplicationFiled: February 4, 2016Publication date: June 2, 2016Inventors: Go Araki, Norihito Naito
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Patent number: 9298124Abstract: When an edge effect or sweeping occurs in a developing material, pixels, among a plurality of pixels that configure image data, will arise in which a developing material consumption amount rises beyond an original consumption amount. A CPU corrects the developing material consumption amount for the pixels, among the plurality of pixels that configure the image data, in which the developing material consumption amount will rise beyond the original consumption amount.Type: GrantFiled: January 14, 2015Date of Patent: March 29, 2016Assignee: Canon Kabushiki KaishaInventors: Go Araki, Norihito Naito
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Publication number: 20160062265Abstract: A developing device configured to develop a latent image formed on an image bearing member includes a rotatable developing-agent bearing member configured to bear developing agent, a developing container configured to form a developing-agent storage chamber that stores the developing agent, a developing-agent regulating portion provided in the developing container to regulate an amount of the developing agent born on the developing-agent bearing member, a support portion configured to support the developing-agent bearing member movably relative to the developing-agent regulating portion, and a pressurizing member configured to pressurize the developing-agent bearing member toward the developing-agent regulating portion. A contact portion of the developing-agent regulating portion with the developing-agent bearing member is fixed to the developing container without forming a gap from the developing container on a downstream side in a pressurizing direction of the pressurizing member.Type: ApplicationFiled: October 29, 2015Publication date: March 3, 2016Inventors: Daisuke Baba, Makoto Tokudome, Masao Uyama, Yuichiro Hirata, Kodai Hayashi, Keisuke Mochizuki, Norihito Naito
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Patent number: 9256157Abstract: A developing apparatus includes a developing container for accommodating a developer; a developer carrying member for carrying the developer to a developing zone for developing a latent image; a developer regulator in contact with the developer carrying member to regulate a developer layer thickness on the developer carrying member; a developer feeding member in contact with the developer carrying member to supply the developer to the developer carrying member; an urging member for urging the developer carrying member toward the developer regulator; and a moving mechanism for moving the developer carrying member in a first direction which is a direction in which the urging member urges the developer carrying member and in a second direction crossing with the first direction. The moving mechanism moves the developer carrying member in the second direction to reduce or remove press-contact forces applied by the developer regulator and the developer feeding member.Type: GrantFiled: June 26, 2013Date of Patent: February 9, 2016Assignee: Canon Kabushiki KaishaInventors: Makoto Tokudome, Daisuke Baba, Yuichiro Hirata, Norihito Naito, Kodai Hayashi, Masao Uyama
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Patent number: 9213257Abstract: A developing device configured to develop a latent image formed on an image bearing member includes a rotatable developing-agent bearing member configured to bear developing agent, a developing container configured to form a developing-agent storage chamber that stores the developing agent, a developing-agent regulating portion provided in the developing container to regulate an amount of the developing agent born on the developing-agent bearing member, a support portion configured to support the developing-agent bearing member movably relative to the developing-agent regulating portion, and a pressurizing member configured to pressurize the developing-agent bearing member toward the developing-agent regulating portion. A contact portion of the developing-agent regulating portion with the developing-agent bearing member is fixed to the developing container without forming a gap from the developing container on a downstream side in a pressurizing direction of the pressurizing member.Type: GrantFiled: December 14, 2012Date of Patent: December 15, 2015Assignee: Canon Kabushiki KaishaInventors: Daisuke Baba, Makoto Tokudome, Masao Uyama, Yuichiro Hirata, Kodai Hayashi, Keisuke Mochizuki, Norihito Naito
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Publication number: 20150205222Abstract: When an edge effect or sweeping occurs in a developing material, pixels, among a plurality of pixels that configure image data, will arise in which a developing material consumption amount rises beyond an original consumption amount. A CPU corrects the developing material consumption amount for the pixels, among the plurality of pixels that configure the image data, in which the developing material consumption amount will rise beyond the original consumption amount.Type: ApplicationFiled: January 14, 2015Publication date: July 23, 2015Inventors: Go Araki, Norihito Naito
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Publication number: 20140348556Abstract: A developing device configured to develop a latent image formed on an image bearing member includes a rotatable developing-agent bearing member configured to bear developing agent, a developing container configured to form a developing-agent storage chamber that stores the developing agent, a developing-agent regulating portion provided in the developing container to regulate an amount of the developing agent born on the developing-agent bearing member, a support portion configured to support the developing-agent bearing member movably relative to the developing-agent regulating portion, and a pressurizing member configured to pressurize the developing-agent bearing member toward the developing-agent regulating portion. A contact portion of the developing-agent regulating portion with the developing-agent bearing member is fixed to the developing container without forming a gap from the developing container on a downstream side in a pressurizing direction of the pressurizing member.Type: ApplicationFiled: December 14, 2012Publication date: November 27, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Daisuke Baba, Makoto Tokudome, Masao Uyama, Yuichiro Hirata, Kodai Hayashi, Keisuke Mochizuki, Norihito Naito
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Publication number: 20140003845Abstract: A developing apparatus includes a developing container for accommodating the developer; a sleeve for carrying the developer to developing zone for developing a latent image; a developer regulator contacted to the sleeve to regulate a developer layer thickness on the sleeve; a developer feeding member contacted to the sleeve supply the developer to the sleeve; an urging member for urging the sleeve toward the developer regulator; and a moving mechanism for moving the sleeve in a first direction which is a direction in which the urging member urges the sleeve and in a second direction crossing with the first direction. The moving mechanism moves the sleeve in the second direction to reduce or remove press-contact forces applied by the developer regulator and the developer feeding member.Type: ApplicationFiled: June 26, 2013Publication date: January 2, 2014Inventors: Makoto Tokudome, Daisuke Baba, Yuichiro Hirata, Norihito Naito, Kodai Hayashi, Masao Uyama
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Patent number: 8615181Abstract: An image forming apparatus includes a rotatable drum; a developing device for developing a latent image formed on the drum into a developer image; and a cleaning blade for removing developer remaining on the drum after the developer image is transferred from the drum onto a developer image receiving member. After image formation, a predetermined amount of strain of the cleaning blade is released and the drum is subsequently rotated. The drum is subsequently rotated in a direction identical to a rotation direction of the drum during image formation.Type: GrantFiled: August 27, 2012Date of Patent: December 24, 2013Assignee: Canon Kabushiki KaishaInventors: Norihito Naito, Takayoshi Kihara, Masahito Kato, Takashi Kase
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Patent number: 8565632Abstract: An image forming apparatus includes an image bearing member for bearing a developer image; a developing device including a developer carrying member for forming the developer image on the image bearing member; a fixing device for fixing the developer image on a sheet material, on which the developer image has been transferred, by heating the sheet material; a memory medium for storing an operation hysteresis value, of the developing device, which varies depending on a state of an operation of the developing device from start of the operation; and a controller for controlling a temperature of the fixing device. The controller controls, when the operation hysteresis value stored in the memory medium reaches a preset threshold, the temperature of the fixing device so as to be lower than that before the operation hysteresis value reaches the preset threshold.Type: GrantFiled: February 25, 2011Date of Patent: October 22, 2013Assignee: Canon Kabushiki KaishaInventors: Masahito Kato, Norihito Naito, Tomonori Matsunaga, Takahiro Ikeda
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Publication number: 20130017007Abstract: An image forming apparatus includes a rotatable drum; a developing device for developing a latent image formed on the drum into a developer image; and a cleaning blade for removing developer remaining on the drum after the developer image is transferred from the drum onto a developer image receiving member. After image formation, a predetermined amount of strain of the cleaning blade is released and the drum is subsequently rotated. The drum is subsequently rotated in a direction identical to a rotation direction of the drum during image formation.Type: ApplicationFiled: August 27, 2012Publication date: January 17, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Norihito Naito, Takayoshi Kihara, Masahito Kato, Takashi Kase
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Patent number: 8275279Abstract: An image forming apparatus includes a rotatable drum; a charging roller for electrically charging the drum; a developing device for developing a latent image formed on the drum into a developer image; a cleaning device for removing a developer remaining on the drum after transfer; and a control device. The cleaning device includes a cleaning blade contacting the drum. The control device is capable of performing an operation for rotating the drum, in a direction identical to the rotational direction of the drum during image formation effected by rotating the drum, after a lapse, without next instruction of image formation, of a predetermined period from a stop of rotation of the drum after completing image formation. The predetermined period is longer with a larger number of sheets subjected to the image formation in an image forming job before the rotation of the image bearing member is stopped.Type: GrantFiled: July 7, 2010Date of Patent: September 25, 2012Assignee: Canon Kabushiki KaishaInventors: Norihito Naito, Takayoshi Kihara, Masahito Kato, Takashi Kase
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Publication number: 20110217059Abstract: An image forming apparatus includes an image bearing member for bearing a developer image; a developing device including a developer carrying member for forming the developer image on the image bearing member; a fixing device for fixing the developer image on a sheet material, on which the developer image has been transferred, by heating the sheet material; a memory medium for storing an operation hysteresis value, of the developing device, which varies depending on a state of an operation of the developing device from start of the operation; and a controller for controlling a temperature of the fixing device. The controller controls, when the operation hysteresis value stored in the memory medium reaches a preset threshold, the temperature of the fixing device so as to be lower than that before the operation hysteresis value reaches the preset threshold.Type: ApplicationFiled: February 25, 2011Publication date: September 8, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Masahito Kato, Norihito Naito, Tomonori Matsunaga, Takahiro Ikeda
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Patent number: 8000633Abstract: The present invention provides a charging member, a charging device, an image forming apparatus, and a process cartridge that minimize local unevenness in potential of a charged object resulting from soiling of the charging member with soiling microparticles or soiling aggregates, that do not cause image failure such as unevenness in image density and scumming, and that output good images through the life of the charging member. The charging member charges a surface of the object by receiving a voltage while being in contact with the object, and satisfies the condition that Rzjis?30 and Rsk?0, where Rzjis represents the ten-point average roughness of a surface of the charging member in contact with the object and Rsk represents the skewness of a roughness curve.Type: GrantFiled: August 13, 2009Date of Patent: August 16, 2011Assignee: Canon Kabushiki KaishaInventors: Masahito Kato, Norihito Naito, Takayoshi Kihara, Takashi Kase
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Publication number: 20110008064Abstract: An image forming apparatus includes a rotatable drum; a charging roller, contacting the drum, for electrically charging the drum; a developing device for developing a latent image formed on the drum into a developer image; and a cleaning device for removing a developer remaining on the drum after the developer image is transferred from the drum onto a developer image receiving member. The cleaning device includes a cleaning blade contacting the drum and having a fixed end and a free end which is located upstream of the fixed end with respect to a rotational direction of the drum. The image forming apparatus further includes a control device for controlling a rotating operation of the drum.Type: ApplicationFiled: July 7, 2010Publication date: January 13, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Norihito Naito, Takayoshi Kihara, Masahito Kato, Takashi Kase
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Patent number: 7692804Abstract: An image forming apparatus operates in a first image formation mode for forming an image on an image bearing member by using developer under a first predetermined image forming condition and a second image formation mode for forming an image on an image bearing member by using developer under a second image forming condition which is different from the first predetermined image forming condition. The apparatus is set so that the amount of consumption of developer for forming an image in the second image formation mode is smaller than the amount of consumption used for forming an identical image in the first image formation mode.Type: GrantFiled: May 14, 2004Date of Patent: April 6, 2010Assignee: Canon Kabushiki KaishaInventors: Norihito Naito, Yasunao Otomo, Hideaki Hasegawa, Nobuo Oshima
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Publication number: 20100046987Abstract: The present invention provides a charging member, a charging device, an image forming apparatus, and a process cartridge that minimize local unevenness in potential of a charged object resulting from soiling of the charging member with soiling microparticles or soiling aggregates, that do not cause image failure such as unevenness in image density and scumming, and that output good images through the life of the charging member. The charging member charges a surface of the object by receiving a voltage while being in contact with the object, and satisfies the condition that Rzjis?30 and Rsk?0, where Rzjis represents the ten-point average roughness of a surface of the charging member in contact with the object and Rsk represents the skewness of a roughness curve.Type: ApplicationFiled: August 13, 2009Publication date: February 25, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Masahito Kato, Norihito Naito, Takayoshi Kihara, Takashi Kase
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Patent number: 7639956Abstract: An image forming apparatus has a first image formation mode for forming an image on an image bearing member by using developer under a first predetermined image forming condition and a second image formation mode for forming an image on an image bearing member by using developer under a second image forming condition which is different from the first predetermined image forming condition and is set so that an amount of consumption of developer with respect to an identical image in the second image formation mode is smaller than that in the first image formation mode, the apparatus includes storing means for storing information on an amount of usage of the image bearing member, and control means for changing the second image forming condition in the second image formation mode depending on the information stored in the storing means.Type: GrantFiled: May 14, 2004Date of Patent: December 29, 2009Assignee: Canon Kabushiki KaishaInventors: Norihito Naito, Kazumi Yamauchi, Yasunao Otomo, Hideaki Hasegawa, Nobuo Oshima