Patents by Inventor Kyoichi Yoshizawa
Kyoichi Yoshizawa 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: 7929886Abstract: A toner cartridge includes, a housing which forms an internal space for housing toner to be fed to an image forming apparatus and which has a filling port for filling the internal space with the toner, a divider plate which is movably provided in the housing so as to be able to divide the internal space, and a fixing portion which can fix the divider plate in a state of dividing the internal space.Type: GrantFiled: October 6, 2008Date of Patent: April 19, 2011Assignee: Konica Minolta Business Technologies, Inc.Inventors: Kyoichi Yoshizawa, Yukio Yamada, Koji Soda, Hideaki Katsuoka
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Publication number: 20090097886Abstract: There is provided a toner cartridge capable of suppressing the use of the toner cartridge beyond its lifetime due to excessive refilling of toner, the toner cartridge including a housing 2 which forms an internal space for housing toner to be fed to an image forming apparatus and which has a filling port 6 for filling the internal space with the toner, a divider plate 4 which is pivotably supported in a swingable manner inside the housing 2 and which can divide the internal space when being hung down by gravity, and a fixing means which can fit the divider plate 4 in between an engaging projection 9 and a stopper 10 by screw-feeding the lower end of the divider plate 4 by a feed screw 3 for feeding toner and which can fix the divider plate 4 in the state of dividing the internal space.Type: ApplicationFiled: October 6, 2008Publication date: April 16, 2009Applicant: Konica Minolta Business Technologies, Inc.Inventors: Kyoichi YOSHIZAWA, Yukio YAMADA, Koji SODA, Hideaki KATSUOKA
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Patent number: 7106981Abstract: An image forming apparatus includes a plurality of printing units each having an image bearing member for rotation about an axis and a process member which cooperates with the image bearing member in an image forming process; a transfer member for moving in contact with the image bearing member of each of the plurality of printing units, an image on each of the image bearing members being transferred onto the transfer member or a recording medium that is transported on the transfer member; a switch unit for switching between a contact state where the image bearing members in the plurality of printing units are in contact with the transfer member and a separate state where the image bearing member(s) in the printing unit(s) other than one of the plurality of printing units are separated from the transfer member; a memory for storing life expectancies of the image bearing member and the process member with regard to the printing unit(s) other than the one of the plurality of printing units; and a control sectioType: GrantFiled: March 1, 2004Date of Patent: September 12, 2006Assignee: Konica Minolta Business Technologies, Inc.Inventors: Junichi Hashimoto, Kyoichi Yoshizawa, Hiroshi Mizuno, Tomoyuki Imura, Hiromasa Ueno, Takanobu Yamada
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Publication number: 20050069334Abstract: An image forming apparatus includes a plurality of printing units each having an image bearing member for rotation about an axis and a process member which cooperates with the image bearing member in an image forming process; a transfer member for moving in contact with the image bearing member of each of the plurality of printing units, an image on each of the image bearing members being transferred onto the transfer member or a recording medium that is transported on the transfer member; a switch unit for switching between a contact state where the image bearing members in the plurality of printing units are in contact with the transfer member and a separate state where the image bearing member(s) in the printing unit(s) other than one of the plurality of printing units are separated from the transfer member; a memory for storing life expectancies of the image bearing member and the process member with regard to the printing unit(s) other than the one of the plurality of printing units; and a control sectioType: ApplicationFiled: March 1, 2004Publication date: March 31, 2005Applicant: Konica Minolta Business Technologies, Inc.Inventors: Junichi Hashimoto, Kyoichi Yoshizawa, Hiroshi Mizuno, Tomoyuki Imura, Hiromasa Ueno, Takanobu Yamada
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Patent number: 6823158Abstract: In an image forming apparatus in which multiple photoconductors for corresponding developers of different colors are disposed along a transfer belt or paper conveyance belt, the photoconductors are disposed at intervals that are each an integer multiple of the outer circumference length of the driving roller that drives the transfer belt or paper conveyance belt, and the distance between at least one pair of photoconductors is made different from the distances between the other pairs of photoconductors. As a result, in comparison with when all of the photoconductors are disposed at equal intervals, the degree of freedom in arranging the multiple image forming units that each include an photoconductor can be increased, while color shift among the developed images of the difference colors on the transfer belt or the like is prevented.Type: GrantFiled: December 10, 2002Date of Patent: November 23, 2004Assignee: Minolta Co., Ltd.Inventors: Takanobu Yamada, Yuusuke Morikami, Kyoichi Yoshizawa
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Publication number: 20030108366Abstract: In an image forming apparatus in which multiple photoconductors for corresponding developers of different colors are disposed along a transfer belt or paper conveyance belt, the photoconductors are disposed at intervals that are each an integer multiple of the outer circumference length of the driving roller that drives the transfer belt or paper conveyance belt, and the distance between at least one pair of photoconductors is made different from the distances between the other pairs of photoconductors. As a result, in comparison with when all of the photoconductors are disposed at equal intervals, the degree of freedom in arranging the multiple image forming units that each include an photoconductor can be increased, while color shift among the developed images of the difference colors on the transfer belt or the like is prevented.Type: ApplicationFiled: December 10, 2002Publication date: June 12, 2003Applicant: Minolta Co., Ltd.Inventors: Takanobu Yamada, Yuusuke Morikami, Kyoichi Yoshizawa