Patents by Inventor Fumito Mizoguchi
Fumito Mizoguchi 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: 9128420Abstract: A belt unit is provided with an endless belt, a driving roller, and a pair of guide ribs. The driving roller is disposed on an inner peripheral surface side of the endless belt and drives the endless belt. The pair of guide ribs is placed on each opposite widthwise end of the inner peripheral surface of the endless belt and contacts both end faces of the driving roller, thus preventing meandering of the endless belt. Additionally, the driving roller is equipped with a low friction region at both opposite lengthwise ends in a predetermined width and the low friction region is configured to have a friction coefficient that is lower than a friction coefficient of a region adjacent to the low friction region.Type: GrantFiled: October 14, 2014Date of Patent: September 8, 2015Assignee: SHARP KABUSHIKI KAISHAInventors: Fumito Mizoguchi, Masashi Hirai, Toshiki Takiguchi
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Publication number: 20150030357Abstract: A belt unit is provided with an endless belt, a driving roller, and a pair of guide ribs. The driving roller is disposed on an inner peripheral surface side of the endless belt and drives the endless belt. The pair of guide ribs is placed on each opposite widthwise end of the inner peripheral surface of the endless belt and contacts both end faces of the driving roller, thus preventing meandering of the endless belt. Additionally, the driving roller is equipped with a low friction region at both opposite lengthwise ends in a predetermined width and the low friction region is configured to have a friction coefficient that is lower than a friction coefficient of a region adjacent to the low friction region.Type: ApplicationFiled: October 14, 2014Publication date: January 29, 2015Inventors: Fumito MIZOGUCHI, Masashi HIRAI, Toshiki TAKIGUCHI
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Patent number: 8881891Abstract: A belt unit is provided with an endless belt, a driving roller, and a pair of guide ribs. The driving roller is disposed on an inner peripheral surface side of the endless belt and drives the endless belt. The pair of guide ribs is placed on each opposite widthwise end of the inner peripheral surface of the endless belt and contacts both end faces of the driving roller, thus preventing meandering of the endless belt. Additionally, the driving roller is equipped with a low friction region at both opposite lengthwise ends in a predetermined width and the low friction region is configured to have a friction coefficient that is lower than a friction coefficient of a region adjacent to the low friction region.Type: GrantFiled: November 19, 2012Date of Patent: November 11, 2014Assignee: Sharp Kabushiki KaishaInventors: Fumito Mizoguchi, Masashi Hirai, Toshiki Takiguchi
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Patent number: 8655239Abstract: A secondary transfer unit stretches a transfer belt in an endless form over a driving roller, a driven roller, a transfer roller, an auxiliary roller, and a support roller therebetween. The transfer belt moves, by rotation of the driving roller, along a circulation path which passes through a transfer position. The transfer roller and the auxiliary roller press the transfer belt from the inner peripheral surface of the transfer belt toward an intermediate transfer belt in the transfer position. The transfer belt has an outer peripheral surface thereof which is pressed against the intermediate transfer belt and is roughened so that the surface roughness of the outer peripheral surface becomes 6 ?m to 10 ?m.Type: GrantFiled: April 3, 2012Date of Patent: February 18, 2014Assignee: Sharp Kabushiki KaishaInventors: Fumito Mizoguchi, Toshiki Takiguchi, Hideshi Izumi, Hiroshi Tachiki
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Publication number: 20120251198Abstract: A secondary transfer unit stretches a transfer belt in an endless form over a driving roller, a driven roller, a transfer roller, an auxiliary roller, and a support roller therebetween. The transfer belt moves, by rotation of the driving roller, along a circulation path which passes through a transfer position. The transfer roller and the auxiliary roller press the transfer belt from the inner peripheral surface of the transfer belt toward an intermediate transfer belt in the transfer position. The transfer belt has an outer peripheral surface thereof which is pressed against the intermediate transfer belt and is roughened so that the surface roughness of the outer peripheral surface becomes 6 ?m to 10 ?m.Type: ApplicationFiled: April 3, 2012Publication date: October 4, 2012Applicant: SHARP KABUSHIKI KAISHAInventors: Fumito MIZOGUCHI, Toshiki TAKIGUCHI, Hideshi IZUMI, Hiroshi TACHIKI
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Publication number: 20120045257Abstract: An intermediate transfer belt includes a belt body and a first and a second travelling guide ribs. The first and the second travelling guide ribs are respectively provided in a first edge portion and a second edge portion in width direction in an internal perimetric face of the belt body. A first joint of the first travelling guide rib and a second joint of the second travelling guide rib are disposed so as to be apart from each other in a circumferential direction of the belt body at least not less than a distance corresponding to a semicircle of an intermediate transfer belt drive roller.Type: ApplicationFiled: July 13, 2011Publication date: February 23, 2012Inventors: Fumito Mizoguchi, Toshiki Takiguchi, Hiroyuki Murai
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Patent number: 7689140Abstract: A blade cleaning jig includes a cleaning portion and a gripping portion. The cleaning portion includes a support body of stainless steel or the like and polishing tape provided on the upper face of this support body, and moreover a cushioning material is inserted between the support body and the polishing tape. A protective member for preventing damage to the surface of a developer roller is attached to the entire lower face of the support body. This protective member is attached bent at a circumferential end portion such that the protective member covers from the lower face of the support body via a circumferential edge portion to an upper face circumferential edge portion.Type: GrantFiled: November 15, 2006Date of Patent: March 30, 2010Assignee: Sharp Kabushiki KaishaInventors: Yohichi Takesawa, Eiichi Kido, Fumito Mizoguchi
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Patent number: 7418214Abstract: A state detection mechanism includes a movable member, a spring member, a fringesection, and a stopper member. The spring member displaces the movable member arranged at the first predetermined position to a second predetermined position by applying restoration force in a D direction to the movable member. The fringe section restricts the displacement by abutting to a protrusion member formed on the movable member arranged at the first predetermined position. The stopper member restricts rotation of the movable member, which rotates around an axis that extends in a D direction, by abutting to the protrusion member formed on the movable member arranged at the first predetermined position. When torque is transmitted to the movable member from a shaft, the movable member rotates wound an axis that extends in the D direction, and the protrusion member and the stopper member abut to each other.Type: GrantFiled: December 5, 2006Date of Patent: August 26, 2008Assignee: Sharp Kabushiki KaishaInventors: Wataru Yoshida, Keiji Kato, Fumito Mizoguchi, Atsushi Inoue
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Patent number: 7251435Abstract: A developing device is provided, in which respective lateral ends (the portions overlapped with the side seals 27) of the front seal board 23 are adhered/fixed to the side seals 27. More specifically, the gap between the both sides A1 and the return edge A2 of the opening section A of the toner tank 49 and the developing roller is sealed by a single plane composed of the side seals 27 and the front seal board 23 that are combined with each other. On this account, there is no gap between the side seal 27 and the front seal board 23 due to vibration caused by external force, time degradation etc. (i.e., it prevents the side seals 27 to be away from the front seal board 23). On this account, toner leakage can be securely prevented even when the developing device is driven for a long period of time or when some kind of vibration is applied to the development device.Type: GrantFiled: February 17, 2005Date of Patent: July 31, 2007Assignee: Sharp Kabushiki KaishaInventors: Toshihide Ohgoshi, Fumito Mizoguchi
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Publication number: 20070140709Abstract: A state detection mechanism includes a movable member, a spring member, a fringe section, and a stopper member. The spring member displaces the movable member arranged at the first predetermined position to a second predetermined position by applying restoration force in a D direction to the movable member. The fringe section restricts the displacement by abutting to a protrusion member formed on the movable member arranged at the first predetermined position. The stopper member restricts rotation of the movable member, which rotates around an axis that extends in a D direction, by abutting to the protrusion member formed on the movable member arranged at the first predetermined position. When torque is transmitted to the movable member from a shaft, the movable member rotates around an axis that extends in the D direction, and the protrusion member and the stopper member abut to each other. Load caused by the torque is applied to a section of this abutment and destroys the protrusion member.Type: ApplicationFiled: December 5, 2006Publication date: June 21, 2007Inventors: Wataru Yoshida, Keiji Kato, Fumito Mizoguchi, Atsushi Inoue
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Publication number: 20070110470Abstract: A blade cleaning jig includes a cleaning portion and a gripping portion. The cleaning portion includes a support body of stainless steel or the like and polishing tape provided on the upper face of this support body, and moreover a cushioning material is inserted between the support body and the polishing tape. A protective member for preventing damage to the surface of a developer roller is attached to the entire lower face of the support body. This protective member is attached bent at a circumferential end portion such that the protective member covers from the lower face of the support body via a circumferential edge portion to an upper face circumferential edge portion.Type: ApplicationFiled: November 15, 2006Publication date: May 17, 2007Applicant: SHARP KABUSHIKI KAISHAInventors: Yohichi Takesawa, Eiichi Kido, Fumito Mizoguchi
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Patent number: 7020416Abstract: The process frame body has the guide portion, and the development device has the to-be-guided shaft. When the process frame body is unattached to the apparatus main body, the guide portion of the development device is absent, thus preventing proper attachment and positioning of the development device. The convex engagement portion is formed integrally with the development device so as to jut into the attachment path for the process frame body. This prevents attachment of the process frame body when the development device is attached first. If users try to attach the process frame body after attachment of the development device, the convex engagement portion interferes with the process frame body, thus preventing attachment of the process frame body.Type: GrantFiled: September 25, 2003Date of Patent: March 28, 2006Assignee: Sharp Kabushiki KaishaInventors: Keiji Kato, Toshio Nishino, Yasuyuki Ishiguro, Fumito Mizoguchi, Wataru Yoshida, Atsushi Inoue, Toshihide Ohgoshi
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Patent number: 6868239Abstract: A detection mechanism is provided with a sealing member made of elastic material for preventing toner leakage between (a) a pierced wall surface of a toner tank through which a rotating shaft is inserted and (b) a second side plate provided on the rotating shaft. With this structure, a flat splicing surface of the sealing member is made to closely contact a second side plate that can be coated with a high lubricant member whose frictional forces is small. When a sealing force of the sealing member is strongly compressed, the sealing member prevents toner from coming into the sliding surface.Type: GrantFiled: May 6, 2003Date of Patent: March 15, 2005Assignee: Sharp Kabushiki KaishaInventors: Atsushi Inoue, Toshio Nishino, Wataru Yoshida, Fumito Mizoguchi, Keiji Katoh, Toshihide Ohgoshi
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Publication number: 20040062566Abstract: The process frame body has the guide portion, and the development device has the to-be-guided shaft. When the process frame body is unattached to the apparatus main body, the guide portion of the development device is absent, thus preventing proper attachment and positioning of the development device. The convex engagement portion is formed integrally with the development device so as to jut into the attachment path for the process frame body. This prevents attachment of the process frame body when the development device is attached first. If users try to attach the process frame body after attachment of the development device, the convex engagement portion interferes with the process frame body, thus preventing attachment of the process frame body.Type: ApplicationFiled: September 25, 2003Publication date: April 1, 2004Inventors: Keiji Kato, Toshio Nishino, Yasuyuki Ishiguro, Fumito Mizoguchi, Wataru Yoshida, Atsushi Inoue, Toshihide Ohgoshi
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Publication number: 20030228160Abstract: In the present detection mechanism, a sealing member made of elastic material for preventing toner leakage is provided between (a) a pierced wall surface of a toner tank through which a second rotating shaft is inserted and (b) a second side plate provided on the second rotating shaft. In this manner, a flat sliding surface of the sealing member is made to closely contact the second side plate, so that it is possible to easily coat the sliding surface with a high lubricant member whose frictional forces is small. Thus, even when a sealing force of the sealing member is enhanced by strongly compressing the sealing member by means of the pierced wall surface and the second side plate so as to prevent the toner from coming into the sliding surface, it is possible to easily suppress unwanted resistance to rotation of the second rotating shaft.Type: ApplicationFiled: May 6, 2003Publication date: December 11, 2003Inventors: Atsushi Inoue, Toshio Nishino, Wataru Yoshida, Fumito Mizoguchi, Keiji Katoh, Toshihide Ohgoshi
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Patent number: 6628910Abstract: A toner container has a partitioning wall disposed therein for partitioning the toner container while allowing communication between partitioned compartments. A waste toner collecting port for receiving the waste toner collected by the cleaning unit of an image forming apparatus is formed in a waste toner collection department. A toner agitating element for mixing waste toner with unused toner is located inside the partitioned waste toner collection compartment.Type: GrantFiled: April 11, 2002Date of Patent: September 30, 2003Assignee: Sharp Kabushiki KaishaInventors: Hiroshi Tanisawa, Fumito Mizoguchi, Hisashi Kunihiro, Takeshi Wakabayashi, Hiroshi Kawahito, Hideaki Hagihara
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Patent number: 6546216Abstract: A flexible element for converting an opening port of a toner supply container in an openable and closable manner is provided so that, when the toner supply container is joined to a developing unit, an external force acting on the developing unit or toner supplying container, deforms the flexible element to uncover the opening and when the toner supply container and developing unit are separated one from another, the opening port is covered by the flexible element.Type: GrantFiled: August 29, 2001Date of Patent: April 8, 2003Assignee: Sharp Kabushiki KaishaInventors: Fumito Mizoguchi, Kiyoshi Morimoto, Arihiro Tsunoda, Hisashi Kunihiro, Takeshi Wakabayashi, Hiroshi Tanizawa
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Patent number: 6510300Abstract: A toner cartridge having toner agitating and mixing properties. The structure insures image quality without increasing in complexity of the structure as well as capable of being compacted. A used toner recycling opening for dropping used toner by gravity is formed in an upper wall of a cartridge main body storing fresh toner. A toner agitator and a toner supply device with an opening for supplying mixed toner to a developing apparatus are arranged within the cartridge main body. The toner can be sufficiently mixed and agitated on a cartridge main body side without depending on a developing apparatus side, and the toner cartridge is prevented from being large-sized. In particular, since the used toner drops by gravity, a taking-in structure of this used toner is simplified, and a mixing work of the used toner with fresh toner is made irrespective of a moving direction of the toner agitator. Also, there are two film sealing members for sealing the used toner recycling and toner supply openings.Type: GrantFiled: May 22, 2001Date of Patent: January 21, 2003Assignee: Sharp Kabushiki KaishaInventors: Fumito Mizoguchi, Hiroshi Kubota, Takeshi Wakabayashi, Hisashi Kunihiro, Takahiko Kimura
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Publication number: 20020150405Abstract: A toner container has a partitioning wall disposed therein for partitioning the toner container whilst allowing communication between partitioned compartments. A waste toner collecting port for receiving the waste toner collected by the cleaning unit of an image forming apparatus is formed in the waste toner collection compartment. A toner agitating element for mixing waste toner with unused toner is arranged inside the partitioned waste toner collection compartment partitioned in the toner container.Type: ApplicationFiled: April 11, 2002Publication date: October 17, 2002Inventors: Hiroshi Tanisawa, Fumito Mizoguchi, Hisashi Kunihiro, Takeshi Wakabayashi, Hiroshi Kawahito, Hideaki Hagihara
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Patent number: D468763Type: GrantFiled: October 26, 2001Date of Patent: January 14, 2003Assignee: Sharp Kabushiki KaishaInventors: Hisashi Kunihiro, Hiroshi Tanisawa, Takeshi Wakabayashi, Hiroshi Kawahito, Fumito Mizoguchi, Hiroshi Kubota