Patents by Inventor Minoru Matsuguma
Minoru Matsuguma 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: 8905908Abstract: A lubricant supplying method for supplying a lubricant to a sliding portion between a cylindrical rotatable member for use in an electrophotographic image forming apparatus and a supporting member for slidably supporting an inner peripheral surface at one end side of the rotatable member with respect to a rotational axis direction of the rotatable member, includes a step of engaging the supporting member, including a hollow portion and an opening which communicates with the hollow portion and is provided at a position in which the opening opposes the sliding portion, with the rotatable member at the one end side; and a step of supplying the lubricant from the hollow portion toward the sliding portion through the opening.Type: GrantFiled: March 17, 2011Date of Patent: December 9, 2014Assignee: Canon Kabushiki KaishaInventors: Minoru Matsuguma, Jun Miyamoto, Kenji Matsuda, Akira Higeta
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Patent number: 8521041Abstract: An image forming apparatus includes an image bearing member; a plurality of developing cartridges including respective toner accommodating portions for accommodating toners for forming an image on the image bearing member; a discriminating portion for discriminating color of the toner accommodated in each of the plurality of developing cartridges; a controller capable of controlling an image forming operation in a state in which the developing cartridges, of the plurality of developing cartridges, accommodating the toners of the same color are mounted; and a storing portion for storing lifetime information of the plurality of developing cartridges, respectively. When the developing cartridges accommodating the toners of the same color are mounted, the controller determines the developing cartridge, of the developing cartridges accommodating the toners of the same color, to be used for performing the image forming operation, on the basis of the lifetime information.Type: GrantFiled: January 27, 2011Date of Patent: August 27, 2013Assignee: Canon Kabushiki KaishaInventors: Katsuhiro Kojima, Kenji Matsuda, Masaki Ojima, Minoru Matsuguma
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Patent number: 8078071Abstract: An image forming apparatus has: a photosensitive drum onto which images are formed; and a primary transfer roller which sequentially forms the color images onto the photosensitive drum by using a plurality of developing devices having different color developers and transfers the color images formed on the drum onto a transfer member or a recording medium. Order of forming the images onto an image bearing member on a photosensitive member is switched based on a use amount of each of the plurality of developing devices.Type: GrantFiled: February 1, 2007Date of Patent: December 13, 2011Assignee: Canon Kabushiki KaishaInventors: Katsuhiro Kojima, Kenji Matsuda, Hideki Matsumoto, Masaki Ojima, Minoru Matsuguma
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Publication number: 20110245054Abstract: A lubricant supplying method for supplying a lubricant to a sliding portion between a cylindrical rotatable member for use in an electrophotographic image forming apparatus and a supporting member for slidably supporting an inner peripheral surface at one end side of the rotatable member with respect to a rotational axis direction of the rotatable member, includes a step of engaging the supporting member, including a hollow portion and an opening which communicates with the hollow portion and is provided at a position in which the opening opposes the sliding portion, with the rotatable member at the one end side; and a step of supplying the lubricant from the hollow portion toward the sliding portion through the opening.Type: ApplicationFiled: March 17, 2011Publication date: October 6, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Minoru Matsuguma, Jun Miyamoto, Kenji Matsuda, Akira Higeta
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Publication number: 20110200340Abstract: An image forming apparatus includes an image bearing member; a plurality of developing cartridges including respective toner accommodating portions for accommodating toners for forming an image on the image bearing member; a discriminating portion for discriminating color of the toner accommodated in each of the plurality of developing cartridges; a controller capable of controlling an image forming operation in a state in which the developing cartridges, of the plurality of developing cartridges, accommodating the toners of the same color are mounted; and a storing portion for storing lifetime information of the plurality of developing cartridges, respectively. When the developing cartridges accommodating the toners of the same color are mounted, the controller determines the developing cartridge, of the developing cartridges accommodating the toners of the same color, to be used for performing the image forming operation, on the basis of the lifetime information.Type: ApplicationFiled: January 27, 2011Publication date: August 18, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Katsuhiro Kojima, Kenji Matsuda, Masaki Ojima, Minoru Matsuguma
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Patent number: 7627269Abstract: An image forming apparatus includes an image bearing member; a charging member for contacting a peripheral surface of the image bearing member to electrically charge the peripheral surface; a first developing device for forming a first developed image on the peripheral surface of the image bearing member charged by the charging member; a second developing device for forming a second developed image on the peripheral surface, wherein a combined developed image is formed by superimposing the first developed image and the second developed image on a common transfer material, wherein when the combined image is being formed, the charging member is cleaned by transferring, by an electric field, material deposited on the charging member to a region between the first developed image and the second developed image on the peripheral surface of the image bearing member, and wherein the first developed image and the second developed image are not formed in the region.Type: GrantFiled: April 3, 2006Date of Patent: December 1, 2009Assignee: Canon Kabushiki KaishaInventors: Minoru Matsuguma, Kenji Matsuda, Masaki Ojima, Katsuhiro Kojima, Hideki Matsumoto
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Publication number: 20070183802Abstract: An image forming apparatus has: a photosensitive drum onto which images are formed; and a primary transfer roller which sequentially forms the color images onto the photosensitive drum by using a plurality of developing devices having different color developers and transfers the color images formed on the drum onto a transfer member or a recording medium. Order of forming the images onto an image bearing member on a photosensitive member is switched based on a use amount of each of the plurality of developing devices.Type: ApplicationFiled: February 1, 2007Publication date: August 9, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Katsuhiro Kojima, Kenji Matsuda, Hideki Matsumoto, Masaki Ojima, Minoru Matsuguma
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Patent number: 7254347Abstract: A unit includes cartridge electrical contacts provided at respective ends of the cartridge in a longitudinal direction and electrically connecting with body electrical contacts when the cartridge is properly mounted to the image forming apparatus. The cartridge electrical contacts are electrically connected to each other. Mounting the cartridge to the image forming apparatus forms a detection circuit via the cartridge.Type: GrantFiled: June 14, 2005Date of Patent: August 7, 2007Assignee: Canon Kabushiki KaishaInventors: Hideki Matsumoto, Masaki Ojima, Kenji Matsuda, Minoru Matsuguma, Katsuhiro Kojima
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Patent number: 7120376Abstract: An image forming apparatus for forming an image on a recording material, includes a rotatable image bearing member; a developing member for developing a latent image formed on the image bearing member; a cleaning blade for removing a developer from the image bearing member, the cleaning blade being cooperative with the image bearing member to form a nip in which the cleaning blade is contacted to the image bearing member within a predetermined area; and a controller for executing a first step of stopping rotation of the image bearing member after completion of an image forming operation for forming an image on the recording material; a second step of rotating, after the first step, the image bearing member through a predetermined peripheral distance in a rotational direction which is the same as a direction in which the image bearing member is rotated during the image forming operation; a third step of rotating, after the second step, the image bearing member in a rotational direction which is opposite the diType: GrantFiled: August 17, 2004Date of Patent: October 10, 2006Assignee: Canon Kabushiki KaishaInventors: Masanobu Saito, Kazuhiro Okubo, Minoru Matsuguma, Jun Haruna, Kazuhisa Maruyama, Yoshihiro Ito
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Publication number: 20060222400Abstract: An image forming apparatus includes an image bearing member; a charging member for contacting a peripheral surface of the image bearing member to electrically charge the peripheral surface; a first developing device for forming a first developed image on the peripheral surface of the image bearing member charged by the charging member; a second developing device for forming a second developed image on the peripheral surface, wherein a combined developed image is formed by superimposing the first developed image and the second developed image on a common transfer material, wherein when the combined image is formed, the charging member is cleaned by transferring material deposited on the charging member to a region between the first developed image and the second developed image on the peripheral surface of the image bearing member, and wherein the first developed image or the second developed image is not formed in the region.Type: ApplicationFiled: April 3, 2006Publication date: October 5, 2006Applicant: Canon Kabushiki KaishaInventors: Minoru Matsuguma, Kenji Matsuda, Masaki Ojima, Katsuhiro Kojima, Hideki Matsumoto
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Publication number: 20050276617Abstract: A unit includes cartridge electrical contacts provided at respective ends of the cartridge in a longitudinal direction and electrically connecting with body electrical contacts when the cartridge is properly mounted to the image forming apparatus. The cartridge electrical contacts are electrically connected to each other. Mounting the cartridge to the image forming apparatus forms a detection circuit via the cartridge.Type: ApplicationFiled: June 14, 2005Publication date: December 15, 2005Applicant: Canon Kabushiki KaishaInventors: Hideki Matsumoto, Masaki Ojima, Kenji Matsuda, Minoru Matsuguma, Katsuhiro Kojima
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Patent number: 6961527Abstract: A method of detecting the end of the life of an image bearing member has: a contact time detecting step of detecting the contact time when a developer carrying member that can be in contact with or have a clearance with an image bearing member contacts the image bearing member, the developer carrying member developing an electrostatic image formed in the image bearing member by a developer; and a determining step of determining the end of the life of the image bearing member in accordance with a parameter calculated by using the contact time detected in the contact time detecting step.Type: GrantFiled: October 10, 2003Date of Patent: November 1, 2005Assignee: Canon Kabushiki KaishaInventors: Minoru Matsuguma, Yasuyuki Ishii
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Publication number: 20050063734Abstract: An image forming apparatus for forming an image on a recording material, includes a rotatable image bearing member; a developing member for developing a latent image formed on the image bearing member; a cleaning blade for removing a developer from the image bearing member, the cleaning blade being cooperative with the image bearing member to form a nip in which the cleaning blade is contacted to the image bearing member within a predetermined area; and a controller for executing a first step of stopping rotation of the image bearing member after completion of an image forming operation for forming an image on the recording material; a second step of rotating, after the first step, the image bearing member through a predetermined peripheral distance in a rotational direction which is the same as a direction in which the image bearing member is rotated during the image forming operation; a third step of rotating, after the second step, the image bearing member in a rotational direction which is opposite the diType: ApplicationFiled: August 17, 2004Publication date: March 24, 2005Applicant: Canon Kabushiki KaishaInventors: Masanobu Saito, Kazuhiro Okubo, Minoru Matsuguma, Jun Haruna, Kazuhisa Maruyama, Yoshihiro Ito
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Patent number: 6771924Abstract: In a color image forming apparatus of a tandem type, a full color image forming mode and a monochrome image forming mode are made selectable. In the monochrome image forming mode, toner is supplied between photosensitive drums for colors that do not contribute to image formation and cleaning devices therefor. Consequently, defective cleaning can be prevented and formation of high quality images becomes possible.Type: GrantFiled: September 4, 2002Date of Patent: August 3, 2004Assignee: Canon Kabushiki KaishaInventor: Minoru Matsuguma
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Publication number: 20040076441Abstract: A method of detecting life of an image bearing member has: a contact time detecting step of detecting contact time when a developer carrying member that can be in contact with or have a clearance with an image bearing member contacts the image bearing member, the developer carrying member developing an electrostatic image formed in the image bearing member by a developer; and a determining step of determining life of the image bearing member in accordance with a parameter calculated by using the contact time detected in the contact time detecting step.Type: ApplicationFiled: October 10, 2003Publication date: April 22, 2004Applicant: CANON KABUSHIKI KAISHAInventors: Minoru Matsuguma, Yasuyuki Ishii
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Patent number: 6704524Abstract: A method of detecting the end of the life of an image bearing member has: a contact time detecting step of detecting the contact time when a developer carrying member that can be in contact with or have a clearance with an image bearing member contacts the image bearing member, the developer carrying member developing an electrostatic image formed in the image bearing member by a developer; and a determining step of determining the end of the life of the image bearing member in accordance with a parameter calculated by using the contact time detected in the contact time detecting step.Type: GrantFiled: December 20, 2002Date of Patent: March 9, 2004Assignee: Canon Kabushiki KaishaInventors: Minoru Matsuguma, Yasuyuki Ishii
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Patent number: 6654568Abstract: An image bearing member life detecting method capable of accurately detecting that the life of an image bearing member has expired or will expire soon, an image forming apparatus using the method, and a cartridge detachably attachable to the image forming apparatus, are provided. An image bearing member damage index number D representing the consumption degree of an image bearing member is calculated on the basis of an applying period under each condition of an electrostatic charge bias applied to an electrostatic charging portion for forming an electrostatic latent image on the image bearing member, and/or the contact period of a developing portion for developing the electrostatic latent image on the image bearing member. When the process speed is switched, the calculation method is switched in accordance with the process speed, and the image bearing member damage index number D is calculated.Type: GrantFiled: December 19, 2002Date of Patent: November 25, 2003Assignee: Canon Kabushiki KaishaInventor: Minoru Matsuguma
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Patent number: 6577823Abstract: A method of detecting the end of the life of an image bearing member has: a contact time detecting step of detecting the contact time when a developer carrying member that can be in contact with or have a clearance with an image bearing member contacts the image bearing member, the developer carrying member developing an electrostatic image formed in the image bearing member by a developer; and a determining step of determining the end of the life of the image bearing member in accordance with a parameter calculated by using the contact time detected in the contact time detecting step.Type: GrantFiled: June 25, 2002Date of Patent: June 10, 2003Assignee: Canon Kabushiki KaishaInventors: Minoru Matsuguma, Yasuyuki Ishii
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Publication number: 20030095805Abstract: This invention provides an image bearing member life detecting method capable of accurately detecting that the life of an image bearing member has expired or will expire soon, an image forming apparatus using the method, and a cartridge detachably attachable to the image forming apparatus.Type: ApplicationFiled: December 19, 2002Publication date: May 22, 2003Applicant: Canon Kabushiki KaishaInventor: Minoru Matsuguma
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Publication number: 20030081958Abstract: A method of detecting life of an image bearing member has: a contact time detecting step of detecting contact time when a developer carrying member that can be in contact with or have a clearance with an image bearing member contacts the image bearing member, the developer carrying member developing an electrostatic image formed in the image bearing member by a developer; and a determining step of determining life of the image bearing member in accordance with a parameter calculated by using the contact time detected in the contact time detecting step.Type: ApplicationFiled: December 20, 2002Publication date: May 1, 2003Applicant: CANON KABUSHIKI KAISHAInventors: Minoru Matsuguma, Yasuyuki Ishii