Patents by Inventor Takuma Abe
Takuma 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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Publication number: 20240133008Abstract: An amorphous alloy soft magnetic powder contains a particle having a composition with a compositional formula (Fe1-xCrx) a (Si1-yBy)100-a-bCb expressed by an atomic ratio, in which 0<x?0.06, 0.3?y?0.7, 70.0?a?81.0, and 0<b?3.0, and when XAFS measurement is performed with an analysis depth set to a bulk, an obtained Fe—K absorption edge XANES spectrum has a first absorption edge structure having a peak A present in a range of 7113±1 eV and a first continuous band structure positioned at a higher energy side than the first absorption edge structure, and an intensity of the peak A at 7113 eV is 0.60 or more and 0.90 or less when an intensity of the first continuous band structure is 1.Type: ApplicationFiled: July 24, 2023Publication date: April 25, 2024Inventors: Atsushi NAKAMURA, Takuma ENOMOTO, Kai KITAMURA, Junya ABE, Masayuki OMOTO
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Publication number: 20220157498Abstract: A ferrite sintered magnet has a ferrite phase having a magnetoplumbite-type crystal structure, and contains at least a metal element A, a metal element R, Fe, Co, Zn, and B. The element A is at least one kind of element selected from the group consisting of Sr, Ba, Ca, and Pb, and essentially includes Ca. The element R is at least one kind of element selected from the group consisting of Bi and rare-earth elements including Y, and essentially includes La. Atomic ratios of the metal elements satisfy the following expressions. A1-rRrFexCoyZnz??(1) 0.40?r?0.70??(2) 8.20?x?9.34??(3) 0.05<y?0.50??(4) 0<z?0.20??(5) The content of Si is 0 to 0.60% by mass in terms of SiO2, and the content of B is 0.01 to 0.70% by mass in terms of B2O3.Type: ApplicationFiled: March 27, 2020Publication date: May 19, 2022Applicant: TDK CorporationInventors: Masashi OHMURA, Junichi NAGAOKA, Shogo MUROYA, Takuma ABE, Jo SATO
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Publication number: 20140105643Abstract: An image forming apparatus includes an image bearing member for carrying a toner image, a movable intermediary transfer member for receiving the toner image from the image bearing member, a primary transfer member for primary transfer of the toner image from the image bearing member onto the intermediary transfer member, a secondary transfer member for being supplied with a voltage and for secondary transfer of the toner image from the intermediary transfer member onto a transfer material, and a first toner charging member. A first charging member rubs a surface of the intermediary transfer member with movement thereof, and a second charging member moves in contact with the intermediary transfer member, thereby transferring toner remaining on the intermediary transfer member after the secondary transfer back to the image bearing member from the intermediary transfer member simultaneously with the primary transfer at the primary transfer station.Type: ApplicationFiled: October 11, 2013Publication date: April 17, 2014Inventors: Seiji Saito, Takuma Abe, Masaru Shimura, Ken Nakagawa, Kenji Kanari, Takamitsu Soda, Takaaki Akamatsu, Kazuhiro Doda, Takashi Shimada, Shuuichi Tetsuno
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Patent number: 8417175Abstract: A toner image formed on an image bearing member is transferred onto a recording material so as to overflow from an edge portion of the recording material, thereby enabling the toner image to be formed so as to extend to the edge portion of the recording material. To suppress the deposition of the toner in the edge portion of the recording material, a cleaning member for cleaning the edge portion of the recording material obtained after the fixing is provided. In order to make a trailing edge of the recording material come into contact with the cleaning member, the recording material which has passed through a fixing apparatus is temporarily switched back, thereby allowing the trailing edge portion of the recording material to collide with the cleaning member.Type: GrantFiled: August 5, 2008Date of Patent: April 9, 2013Assignee: Canon Kabushiki KaishaInventors: Hidetoshi Yamashita, Hisayuki Tomura, Kiyoharu Yoshioka, Michio Uchida, Tomonori Shida, Keisuke Mitsuhashi, Takuma Abe, Takao Nada
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Patent number: 8107849Abstract: A compact image forming apparatus is provided in which stains on the back of a transfer material can be prevented. In particular, in a marginless print mode in which a toner image can be formed to the edge of a transfer material, a large amount of toner adheres to a transfer-material bearing member. The image forming apparatus includes a collecting member that can temporarily collect the toner adhering to the transfer-material bearing member. The toner that is temporarily collected by the collecting member is transferred to an intermediate transfer member and is cleaned by a cleaning unit.Type: GrantFiled: June 3, 2009Date of Patent: January 31, 2012Assignee: Canon Kabushiki KaishaInventors: Hisayuki Tomura, Kiyoharu Yoshioka, Michio Uchida, Tomonori Shida, Keisuke Mitsuhashi, Takao Nada, Takuma Abe, Hidetoshi Yamashita, Youhei Suzuki
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Patent number: 7957659Abstract: Provided is an image forming apparatus in which the image forming apparatus has a marginless mode in which the toner image is formed on said image bearing member in an area that covers the recording material and an area outside the recording material, and the toner image is transferred to extend beyond an edge of the recording material carried by said recording material carrying member, the image forming apparatus further including: a detecting device which detects the toner image that extends beyond the edge of the recording material and is transferred to said recording material carrying member in the marginless mode; and a control device which uses a detection result provided by said detecting device to control where said exposure device forms a latent image on said image bearing member.Type: GrantFiled: November 21, 2008Date of Patent: June 7, 2011Assignee: Canon Kabushiki KaishaInventors: Takao Nada, Takuma Abe, Kiyoharu Yoshioka, Tomonori Shida, Keisuke Mitsuhashi, Michio Uchida, Noritomo Yamaguchi, Tomoya Tateishi
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Publication number: 20090324278Abstract: A compact image forming apparatus is provided in which stains on the back of a transfer material can be prevented. In particular, in a marginless print mode in which a toner image can be formed to the edge of a transfer material, a large amount of toner adheres to a transfer-material bearing member. The image forming apparatus includes a collecting member that can temporarily collect the toner adhering to the transfer-material bearing member. The toner that is temporarily collected by the collecting member is transferred to an intermediate transfer member and is cleaned by a cleaning unit.Type: ApplicationFiled: June 3, 2009Publication date: December 31, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Hisayuki Tomura, Kiyoharu Yoshioka, Michio Uchida, Tomonori Shida, Keisuke Mitsuhashi, Takao Nada, Takuma Abe, Hidetoshi Yamashita, Youhei Suzuki
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Publication number: 20090232530Abstract: An apparatus includes an image bearing member for carrying an image; an intermediary transfer member for receiving the image; a primary transfer member for transfer of the image onto the intermediary transfer member in a primary transfer station; a secondary transfer member for transfer of the image onto a transfer material in a secondary transfer station; a first charging member for charging toner remaining in a region upstream of the primary transfer station and downstream of the secondary transfer station; and a second charging member for charging the toner remaining in a region upstream of the primary transfer station and downstream of the first charging member. The first charging member rubs a surface of, and the second charging member moves in contact with, the intermediary transfer member, to transfer the toner remaining on the intermediary transfer member to the image bearing member simultaneously with the primary transfer.Type: ApplicationFiled: February 24, 2009Publication date: September 17, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Seiji Saito, Takuma Abe, Masaru Shimura, Ken Nakagawa, Kenji Kanari, Takamitsu Soda, Takaaki Akamatsu, Kazuhiro Doda, Takashi Shimada, Shuuichi Tetsuno
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Publication number: 20090136247Abstract: Provided is an image forming apparatus in which the image forming apparatus has a marginless mode in which the toner image is formed on said image bearing member in an area that covers the recording material and an area outside the recording material, and the toner image is transferred to extend beyond an edge of the recording material carried by said recording material carrying member, the image forming apparatus further including: a detecting device which detects the toner image that extends beyond the edge of the recording material and is transferred to said recording material carrying member in the marginless mode; and a control device which uses a detection result provided by said detecting device to control where said exposure device forms a latent image on said image bearing member.Type: ApplicationFiled: November 21, 2008Publication date: May 28, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Takao Nada, Takuma Abe, Kiyoharu Yoshioka, Tomonori Shida, Keisuke Mitsuhashi, Michio Uchida, Noritomo Yamaguchi, Tomoya Tateishi
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Publication number: 20090052966Abstract: A toner image formed on an image bearing member is transferred onto a recording material so as to overflow from an edge portion of the recording material, thereby enabling the toner image to be formed so as to extend to the edge portion of the recording material. To suppress the deposition of the toner in the edge portion of the recording material, a cleaning member for cleaning the edge portion of the recording material obtained after the fixing is provided. In order to make a trailing edge of the recording material come into contact with the cleaning member, the recording material which has passed through a fixing apparatus is temporarily switched back, thereby allowing the trailing edge portion of the recording material to collide with the cleaning member.Type: ApplicationFiled: August 5, 2008Publication date: February 26, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Hidetoshi Yamashita, Hisayuki Tomura, Kiyoharu Yoshioka, Michio Uchida, Tomonori Shida, Keisuke Mitsuhashi, Takuma Abe, Takao Nada
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Patent number: 6564034Abstract: A cleaning device for removing residual toner on a surface of an electrophotographic photosensitive member includes a cleaning blade for scraping residual toner off the surface of the photosensitive member, and a toner supply portion, disposed in an upper stream side of the cleaning blade as viewed in a moving direction of the surface of the photosensitive member, for causing toner to stick to the surface of the photosensitive member, the toner supply portion being switchable between a first mode of causing toner to stick to the surface of the photosensitive member to supply toner to the nip between the surface of the photosensitive member and the cleaning blade and a second mode of not causing toner to stick to the surface of the photosensitive member or of decreasing an amount of toner to be stuck to the surface of the photosensitive member, the second mode being selectable when a main switch of an image forming apparatus having the cleaning device mounted therein has become turned on.Type: GrantFiled: December 3, 1999Date of Patent: May 13, 2003Assignee: Canon Kabushiki KaishaInventor: Takuma Abe
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Patent number: 6438337Abstract: The present invention provides an image forming apparatus which has an image bearing member developing device for developing an electrostatic latent image formed on the image bearing member with developer, cleaning device for removing residual developer on the image bearing member by contacting with the image bearing member at a cleaning position, charging applying device for applying charge of polarity opposite to normal charging polarity of the developer to the developer before the developer applied to the image bearing member is carried to the cleaning position, wherein a developer image formed on the image bearing member by the developing device is transferred onto a transfer material and wherein the developing device applies developer to an area of the image bearing member which is not contacted with the transfer material, and the developer is carried to the cleaning position by the image bearing member.Type: GrantFiled: July 31, 2000Date of Patent: August 20, 2002Assignee: Canon Kabushiki KaishaInventor: Takuma Abe