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公开(公告)号：US20240176270A1
公开(公告)日：2024-05-30
申请号：US18520070
申请日：2023-11-27
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu SHIMIZU , Hiroshi YAMAZAKI , Kenichi TAMAKI , Junichi NAKAGAWA , Takuji WATANABE
CPC classification number: G03G15/50 , G03G15/0887 , G03G21/206
Abstract: The developing device includes a development container, a developer carrier, and a toner trapping mechanism. The development container includes a first conveyance chamber and a second conveyance chamber placed in parallel juxtaposition and communicated with each other at their longitudinal both end portions, and the development container contains a toner-containing developer to be fed to an image carrier. The toner trapping mechanism includes a duct, an air inlet port, an air exhaust port, a filter, and a fan. The air inlet port is placed at a connecting portion between the duct and the second conveyance chamber, and opened along the longitudinal direction of the second conveyance chamber so as to allow air present in the second conveyance chamber to flow into the duct. The air exhaust port is placed downstream of the air inlet port as viewed in a developer conveyance direction of the second conveyance chamber.
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公开(公告)号：US20230408976A1
公开(公告)日：2023-12-21
申请号：US18332440
申请日：2023-06-09
Applicant: KYOCERA Document Solutions Inc.
Inventor： Kenichi TAMAKI , Hiroshi YAMAZAKI , Junichi NAKAGAWA , Takuji WATANABE , Tamotsu SHIMIZU
CPC classification number: G03G21/206 , G03G15/0848
Abstract: Provided is an image forming apparatus in which, while image formation is prevented from being performed, scattered toner that has dropped from a filter and adhered to an outer peripheral surface of a developer carrying member is recovered. A fixed magnet of the developer carrying member has a first pole that is arranged to face the filter, and a second pole and a third pole on a downstream side relative to the first pole. The first pole and the second pole have polarities opposite to each other, and the second pole and the third pole have a same polarity. A length of a gap between the developing container and an area where the developing sleeve faces the second pole among areas of the developing sleeve is smaller than a length between the developing sleeve and the filter.
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公开(公告)号：US20230408964A1
公开(公告)日：2023-12-21
申请号：US18332143
申请日：2023-06-09
Applicant: KYOCERA Document Solutions Inc.
Inventor： Junichi NAKAGAWA , Tamotsu SHIMIZU , Hiroshi YAMAZAKI , Kenichi TAMAKI , Takuji WATANABE
CPC classification number: G03G21/0052 , G03G15/081 , G03G15/0889 , G03G15/0808 , G03G7/0013 , G03G2215/085 , G03G2221/0021
Abstract: Provided is an image forming apparatus in which, while image formation is prevented from being performed, scattered toner that has dropped from a filter and adhered to an outer peripheral surface of a developer carrying member is recovered by a cleaning unit through intermediation of an image bearing member. An absolute value of a perpendicular-magnetic-force gradient of a fixed magnet of the developer carrying member is 4.0 mT/° or less at a position where the fixed magnet faces a central portion of the filter in a rotation direction of a developing sleeve.
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公开(公告)号：US20180253033A1
公开(公告)日：2018-09-06
申请号：US15890702
申请日：2018-02-07
Applicant: KYOCERA Document Solutions Inc.
Inventor： Masashi FUJISHIMA , Norio KUBO , Junichi NAKAGAWA , Asami SASAKI
IPC: G03G15/08
CPC classification number: G03G15/0891 , G03G15/0829 , G03G15/0849 , G03G15/0853 , G03G15/0865 , G03G15/0889 , G03G15/0893 , G03G15/095 , G03G2215/0607 , G03G2215/066 , G03G2215/0819 , G03G2215/083 , G03G2221/0005
Abstract: A developing device includes a developing container, first and second stirring-conveyance members, a developer carrier, a toner concentration sensor, a scraper, and a scraper attachment unit. The second stirring-conveyance member includes a rotation shaft, a first spiral blade to convey developer in an axial direction, and a second spiral blade to overlap a region where the first spiral blade is formed, which is opposite to the first spiral blade in phase, and lower than the first spiral blade in height in a radial direction. An absent region, where the second spiral blade does not exist, is formed in one pitch of the first spiral blade, the one pitch facing the toner concentration sensor. The scraper attachment unit is formed to extend, along a straight line passing through intersection points of the first and second spiral blades and parallel to the rotation shaft, into the absent region.
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公开(公告)号：US20230408974A1
公开(公告)日：2023-12-21
申请号：US18331704
申请日：2023-06-08
Applicant: KYOCERA Document Solutions Inc.
Inventor： Takuji WATANABE , Junichi NAKAGAWA , Kenichi TAMAKI , Hiroshi YAMAZAKI , Tamotsu SHIMIZU
IPC: G03G21/20
CPC classification number: G03G21/206
Abstract: An image forming apparatus includes a development device, and a control unit that controls the development device. The development device includes a toner collection mechanism having a duct, a filter, and an exhaust fan. The duct is connected to a conveyance chamber of the development container and allows air in the conveyance chamber to flow through. The filter is disposed at a connecting part between the duct and the conveyance chamber, and collects toner flowing into the duct from the conveyance chamber. The exhaust fan makes the air in the conveyance chamber flow to the outside via the duct. The control unit changes rotational frequency or operation frequency of the exhaust fan based on current detected by a current detection unit at non-image forming time.
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Patent Agency Ranking
公开(公告)号：US20230408973A1
公开(公告)日：2023-12-21
申请号：US18331671
申请日：2023-06-08
Applicant: KYOCERA Document Solutions Inc.
Inventor： Junichi NAKAGAWA , Tamotsu SHIMIZU , Hiroshi YAMAZAKI , Kenichi TAMAKI , Takuji WATANABE
CPC classification number: G03G21/206 , G03G15/09 , G03G21/10
Abstract: An image forming apparatus includes an image carrier, a cleaning unit, a development device, and a control unit. The development device includes a toner collection mechanism having a developer carrier and a filter. The control unit is capable of executing a scattered toner recovery mode at non-image forming time, in which the filter is vibrated, a potential difference is generated in the direction for the toner to move from the developer carrier to the image carrier, the developer carrier is rotated in a reverse direction to that at image forming time, and the image carrier is rotated in the same direction as that at the image forming time, so that scattered toner, which has dropped from the filter and adhered to the developer carrier, is recovered by the cleaning unit via the image carrier.
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公开(公告)号：US20240176262A1
公开(公告)日：2024-05-30
申请号：US18517655
申请日：2023-11-22
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu SHIMIZU , Kenichi TAMAKI , Hiroshi YAMAZAKI , Junichi NAKAGAWA , Takuji WATANABE
IPC: G03G15/08
CPC classification number: G03G15/0898 , G03G15/0891 , G03G2215/085
Abstract: The developing device includes a development container, a developer carrier, and a toner trapping mechanism. The development container includes a first conveyance chamber and a second conveyance chamber placed in parallel juxtaposition and communicated with each other at their longitudinal both end portions, and the development container contains a toner-containing developer to be fed to an image carrier. The toner trapping mechanism includes a duct, an air inlet port, a trapping filter, and a fan. The duct is connected to the second conveyance chamber, and allows air present in the second conveyance chamber to flow therethrough. The development container has an air vent opened in the first conveyance chamber and communicated with outside of the development container.
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公开(公告)号：US20240176289A1
公开(公告)日：2024-05-30
申请号：US18517567
申请日：2023-11-22
Applicant: KYOCERA Document Solutions Inc.
Inventor： Kenichi TAMAKI , Tamotsu SHIMIZU , Hiroshi YAMAZAKI , Junichi NAKAGAWA , Takuji WATANABE
CPC classification number: G03G21/206 , G03G15/0921
Abstract: A developing device includes a developer container and a developer carrying member. The developer carrying member includes a shaft, a sleeve that rotates while carrying toner on its outer circumferential face, and a magnet that extends along the axis of the developer carrying member. The developer container includes a duct, an intake port which opens above the developer carrying member and through which the inside of the developer container and the inside of the duct communicate with each other, and a first filter that covers the intake port. The edges of the first filter at one side and at the other side in the axial direction of the developer carrying member are both located within a range opposite the magnet as seen from the direction perpendicular to the axial direction.
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公开(公告)号：US20240176271A1
公开(公告)日：2024-05-30
申请号：US18521156
申请日：2023-11-28
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu SHIMIZU , Hiroshi YAMAZAKI , Kenichi TAMAKI , Junichi NAKAGAWA , Takuji WATANABE
IPC: G03G15/00 , G03G15/095 , G03G21/20
CPC classification number: G03G15/50 , G03G15/095 , G03G21/206
Abstract: The image forming apparatus includes a developing part and a vibration generating part. The vibration generating part vibrates a filter provided in the developing part. The developing part includes a development container, a developer carrier, and a toner trapping mechanism. The development container includes a first conveyance chamber and a second conveyance chamber placed in parallel juxtaposition. The toner trapping mechanism has a duct, an air inlet port, an air exhaust port, and a filter. The air inlet port is opened along the longitudinal direction of the second conveyance chamber so as to allow air present in the second conveyance chamber to flow into the duct. The vibration generating part is placed outside the developing part so as to be opposed to the development container and positioned on a downstream side in a developer conveyance direction of the second conveyance chamber.
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公开(公告)号：US20230408975A1
公开(公告)日：2023-12-21
申请号：US18332249
申请日：2023-06-09
Applicant: KYOCERA Document Solutions Inc.
Inventor： Hiroshi YAMAZAKI , Junichi NAKAGAWA , Tamotsu SHIMIZU , Kenichi TAMAKI , Takuji WATANABE
IPC: G03G21/20
CPC classification number: G03G21/206
Abstract: Provided is an image forming apparatus that is capable of carrying out a scattered-toner recovery mode in which, while image formation is prevented from being performed, scattered toner that has dropped from a filter and adhered to an outer peripheral surface of a developer carrying member is recovered by a cleaning unit through intermediation of an image bearing member. A fixed magnet of the developer carrying member has a first pole that faces the image bearing member, a second pole that faces the filter, and an intermediate pole between the first pole and the second pole.
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