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公开(公告)号：US20250123578A1
公开(公告)日：2025-04-17
申请号：US18910584
申请日：2024-10-09
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu SHIMIZU , Yoshihiro YAMAGISHI , Kazuki NAKAI , Shiori KIHARA , Shinya SAKAOKA
Abstract: An image forming apparatus includes an image forming portion, a toner storage container, an odor generator, an odor sensor, and a control portion. The image forming portion includes an image carrying member and a development device that develops an electrostatic latent image formed on the image carrying member into a toner image. The toner storage container is rotatable, stores toner for forming the toner image, and is removably mountable in the image forming apparatus. The odor generator is provided at a position where it is rotatable together with the toner storage container, and carries an odor substance. The odor sensor senses the odor substance diffusing from the odor generator. The control portion rotates the toner storage container after its mounting in the image forming apparatus before toner supplying operation, and senses the odor substance at a sensing position where the odor generator is closest to the odor sensor.
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公开(公告)号：US20240319629A1
公开(公告)日：2024-09-26
申请号：US18575573
申请日：2022-03-31
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu SHIMIZU , Kohei TERASAKI , Yusuke KURANO , Masashi YAMASHITA , Eriko TAKEUCHI
CPC classification number: G03G9/09733 , G03G9/0819 , G03G9/1136 , G03G9/1139
Abstract: In a two-component developer, external additive particles of toner particles include resin particles. The resin particles contain a crosslinked resin including a repeating unit derived from a crosslinking agent. Carrier particles each include a carrier core and a coat layer covering a surface of the carrier core. The coat layers contain a coating resin and barium titanate particles. The coating resin includes a silicone resin. The barium titanate particles have a number average primary particle diameter within a range of 100 nm to 500 nm. The barium titanate particles have a content within a range of 5 parts by mass to 45 parts by mass relative to 100 parts by mass of the coating resin. A rate of a mass of the coat layers to a mass of the carrier cores is greater than 0.0% by mass and no greater than 4.9% by mass. The carrier cores have a shape factor within a range of 34.0% to 85.0%.
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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：US20240077810A1
公开(公告)日：2024-03-07
申请号：US18458713
申请日：2023-08-30
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu SHIMIZU , Kohei TERASAKI , Akira MATAYOSHI , Yuji TOYOTA
CPC classification number: G03G9/08773 , G03G9/10 , G03G15/0865
Abstract: A developer includes a toner containing toner particles and a carrier containing carrier particles. The toner particles each include a toner mother particle and external additive particles attached to a surface of the toner mother particle. The external additive particles include first silica particles and spacer particles. The first silica particles have a number average primary particle diameter of at least 10 nm and no greater than 30 nm. The spacer particles have a number average primary particle diameter of at least 32 nm and no greater than 145 nm. The spacer particles in the toner particles have a coverage ratio of at least 2.0% by area and no greater than 40.0% by area. The carrier particles each include a carrier mother particle and strontium titanate particles attached to a surface of the carrier mother particle.
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公开(公告)号：US20240069469A1
公开(公告)日：2024-02-29
申请号：US18455662
申请日：2023-08-25
Applicant: KYOCERA Document Solutions Inc.
Inventor： Masashi FUJISHIMA , Tamotsu SHIMIZU , Asami SASAKI , Eriko TAKEUCHI
CPC classification number: G03G15/0891 , G03G9/0823 , G03G9/1139 , G03G15/0898 , G03G15/0907 , G03G15/0848 , G03G2215/0619 , G03G2215/0634
Abstract: An image forming apparatus includes a developer, a development device, and an image bearing member. The developer includes an initial developer containing an initial carrier and a replenishment developer containing a replenishment carrier. The initial carrier has a surface roughness Sa1 of at least 0.3 μm and no greater than 1.0 μm. A ratio Sa1/Sa2 of the surface roughness Sa1 of the initial carrier to a surface roughness Sa2 of the replenishment carrier is at least 1.2 and no greater than 3.4. The packing volume Vp calculated from equation (1)“Vp=100×Y/(Z×DS)” was at least 40% and no greater than 70%. In equation (1), Y represents an amount of the developer conveyed by a developer bearing member. Z represents an apparent density of the initial developer. DS represents a width of a space between the developer bearing member and the image bearing member.
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Patent Agency Ranking
公开(公告)号：US20230034149A1
公开(公告)日：2023-02-02
申请号：US17859307
申请日：2022-07-07
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu SHIMIZU , Yuji TOYOTA , Yasuhiro TAUCHI
Abstract: A developing device includes a developing container storing a two-component developer, a developer carrying member, and a regulation member. The developer carrying member includes a developing sleeve, and a magnet having a regulation pole opposite the regulation member and a main pole opposite the image carrying member. The regulation member is arranged downstream of the position at which the vertical magnetic force of the regulation pole is 0 [mT] but upstream of a position at which the vertical and horizontal magnetic forces of the regulation pole are equal. Let the horizontal magnetic force gradient at the position at which the horizontal magnetic force of the main pole is 0 [mT] be A and the horizontal magnetic force gradient at the upstream-side surface of the regulation member along the rotation direction of the developing sleeve be B, then |A|>2.45 and |B|
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公开(公告)号：US20230030358A1
公开(公告)日：2023-02-02
申请号：US17858537
申请日：2022-07-06
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu SHIMIZU , Yuji TOYOTA , Yasuhiro TAUCHI
Abstract: A developing device includes a developing container storing a two-component developer containing a magnetic carrier and a toner, a developer carrying member carrying the developer on its outer circumferential surface, and a regulation member arranged to be opposed at a prescribed distance to the developer carrying member. The developer carrying member includes a developing sleeve on which a magnetic brush is formed, and a magnet secured in the developing sleeve and having a plurality of magnetic poles including a regulation pole opposed to the regulation member and a downstream-side magnetic pole arranged downstream of the regulation pole with respect to the rotation direction of the developing sleeve. The magnet is such that the vertical magnetic force gradient [mT/° ] has a local minimum value near a position at which the vertical magnetic force is 0 [mT] between the downstream-side surface of the regulation member and the downstream-side magnetic pole.
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公开(公告)号：US20240184227A1
公开(公告)日：2024-06-06
申请号：US18576301
申请日：2022-03-31
Applicant: KYOCERA Document Solutions Inc.
Inventor： Kohei TERASAKI , Tamotsu SHIMIZU , Yusuke KURANO , Masashi YAMASHITA , Yuma UCHIHASHI
CPC classification number: G03G9/1139 , G03G9/0819 , G03G9/09708 , G03G9/1135
Abstract: In a two-component developer, toner particles include toner mother particles and external additive particles including strontium titanate particles. A first percentage content being a percentage content of the strontium titanate particles to the mass of the toner mother particles is 0.30-0.90% by mass. The carrier particles include carrier cores and coat layers. The coat layers contain barium titanate particles and a coating resin including a silicone resin. The barium titanate particles have a number average primary particle diameter of 100-500 nm. A second percentage content being a percentage content of the coat layers to the mass of the carrier cores is 2.0-4.0% by mass. A third percentage content being a percentage content of the barium titanate to the mass of the coating resin satisfies formula (1) “(X×10)≤Z≤45.0”. In formula (1), X represents the first percentage content and Z represents the third percentage content.
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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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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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