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公开(公告)号：US20240361710A1
公开(公告)日：2024-10-31
申请号：US18644520
申请日：2024-04-24
Applicant: Konica Minolta, Inc.
Inventor： Yukiko NAKAI , Michiaki ISHIKAWA , Yusuke TAKIGAURA , Junya ONISHI , Keiji ARAI
CPC classification number: G03G9/08755 , G03G9/0819 , G03G9/09725 , G03G15/0928 , G03G2215/0604
Abstract: An image forming system includes, an electrostatic charge image developing toner; and a developing sleeve configured to convey the electrostatic charge image developing toner, wherein a toner particle included in the electrostatic charge image developing toner contains an amorphous polyester, the amorphous polyester is a polycondensate of a polyvalent carboxylic acid and a polyhydric alcohol, a content percentage of a structural unit derived from a bisphenol A derivative in the amorphous polyester is 10 mol % or less with respect to all structural units derived from the polyhydric alcohol, and the developing sleeve includes an aluminum alloy including more than 0.6% by mass of silicon.
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公开(公告)号：US12105470B2
公开(公告)日：2024-10-01
申请号：US17493107
申请日：2021-10-04
Applicant: FUJIFILM Business Innovation Corp.
Inventor： Daisuke Ishizuka , Eiji Kawakami
CPC classification number: G03G9/0819 , G03G9/0821 , G03G9/0827 , G03G15/08
Abstract: A toner for developing an electrostatic charge image contains toner particles including first toner particles and second toner particles, the first toner particles having a brightness of less than 90 and the second toner particles having a brightness of 90 or more. The second toner particles constitute 0.1% by number or more and 10% by number or less of the toner particles, and, in the size distribution of the second toner particles, toner particles having a diameter equal to or smaller than the number-average diameter Dn of the toner particles constitute 70% by number or more.
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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：US20240302769A1
公开(公告)日：2024-09-12
申请号：US18591850
申请日：2024-02-29
Applicant: Konica Minolta, Inc.
Inventor： Kazumi OURA , Hiroshi NAGASAWA , Masaharu MATSUBARA , Koji SHIBATA , Akihiko ITAMI , Makoto NOMIYA , Natsuki ITO
CPC classification number: G03G15/1605 , C04B35/47 , G03G9/0819 , G03G21/0005 , G03G2215/0861
Abstract: Disclosed is an image forming method including: developing, with an electrostatic charge image developing toner, a latent image formed on a photoreceptor in which a photosensitive layer is formed on a support containing aluminum as a main component; transferring a toner image on the photoreceptor onto a transfer target; and rubbing and removing the electrostatic charge image developing toner remaining on the photoreceptor after the transferring. The support contains silicon in a range of more than 0.6% by mass and 12.6% by mass or less, a shape factor of toner particles included in the electrostatic charge image developing toner is in a range of 0.800 to 0.970, and a content of the toner particles having a particle diameter of 2 μm or less is in a range of 5% by number to 30% by number.
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公开(公告)号：US20240302760A1
公开(公告)日：2024-09-12
申请号：US18598653
申请日：2024-03-07
Applicant: KYOCERA Document Solutions Inc.
Inventor： Toshiki TAKEMORI
CPC classification number: G03G9/09708 , G03G9/0819
Abstract: A toner contains toner particles. The toner particles each include a toner mother particle and an external additive attached to the surface of the toner mother particle. The external additive contains specific external additive particles. The specific external additive particles each include an aluminum oxide particle and a coat layer covering the surface of the aluminum oxide particle. The coat layers contain antimony tin oxide particles. The specific external additive particles have a powder specific resistance of no greater than 100 Ω·cm. The specific external additive particles have a volume median diameter of 100 nm to 550 nm. The specific external additive particles have surfaces with an arithmetic mean roughness Ra of 8 nm to 45 nm. The specific external additive particles have a content of 0.3 parts by mass to 4.0 parts by mass relative to 100 parts by mass of the toner mother particles.
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Patent Agency Ranking
公开(公告)号：US20240264545A1
公开(公告)日：2024-08-08
申请号：US18418782
申请日：2024-01-22
Applicant: CANON KABUSHIKI KAISHA
Inventor： ATSUHIKO OHMORI , TOMOHISA SANO , KOSUKE FUKUDOME , TOHRU HIRAMATSU , HIROKI KAGAWA , KAZUYUKI SATO
CPC classification number: G03G9/09725 , G03G9/0819 , G03G9/09328 , G03G9/0975
Abstract: To provide a toner that is less likely to cause image defects due to the detachment of the silica aggregated particle even when having been used for a long period of time in a low-temperature and low-humidity environment. The toner includes: a toner particle containing a binder resin; and a silica aggregated particle, wherein, in TOF-SIMS measurement of the toner particle, a fragment peak derived from a boron atom and a fragment peak derived from a boron-oxygen structure are detected; the silica aggregated particle is an aggregated particle of silica fine particles having a primary particle size based on number of from 20 to 75 nm, a maximum Feret's diameter of the silica aggregated particle is from 110 to 500 nm, and an aspect ratio thereof is from 1.50 to 4.00.
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公开(公告)号：US20240231250A1
公开(公告)日：2024-07-11
申请号：US18544218
申请日：2023-12-18
Applicant: CANON KABUSHIKI KAISHA
Inventor： KAZUYUKI SATO , TOMOHISA SANO , TOHRU HIRAMATSU , ATSUHIKO OHMORI , KOSUKE FUKUDOME , HIROKI KAGAWA
CPC classification number: G03G9/09716 , G03G9/0819
Abstract: A toner containing: a toner particle containing a binder resin; and an external additive, wherein a peak corresponding to boric acid is detected in ATR-IR analysis of the toner particle using germanium as an ATR crystal in an ATR method, the external additive contains a hydrophobized fine alumina particle produced by surface-treating a fine alumina particle, which is a fine base particle, with a hydrophobic treatment agent, the hydrophobized fine alumina particle has a hydrophobicity of 50 or more and 90 or less, the hydrophobized fine alumina particle has a volume resistivity of 1.0×108 Ω·cm or more and 1.0×1012 Ω·cm or less, and a rate of atoms originated from the fine base particle in the hydrophobized fine alumina particle is 30 atomic % or more and 70 atomic % or less.
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公开(公告)号：US20240210846A1
公开(公告)日：2024-06-27
申请号：US18528208
申请日：2023-12-04
Applicant: Oki Electric Industry Co., Ltd.
Inventor： Karin HASEGAWA
CPC classification number: G03G9/0819 , G03G15/0856 , G03G15/0877 , G03G15/5087 , G03G2215/0106
Abstract: An image formation apparatus according to an embodiment may include: a first image formation unit including a storage part storing a glitter developer and configured to form a glitter developer image with the glitter developer; and a controller configured to control an operation of the first image formation unit based on print data received. The controller is configured to: when a remaining amount of the glitter developer in the storage part is a first remaining amount, to form the glitter developer image such that the glitter developer image is divided per unit area by a first division number; and when the remaining amount of the glitter developer in the storage part is a second remaining amount less than the first remaining amount, to form the glitter developer image such that the glitter developer image is divided per unit area by a second division number smaller than the first division number.
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公开(公告)号：US20240192617A1
公开(公告)日：2024-06-13
申请号：US18502515
申请日：2023-11-06
Applicant: CANON KABUSHIKI KAISHA
Inventor： TATSUYA SAEKI , KENJI AOKI , NAOYA ISONO , MARIKO YAMASHITA , YUKI MASUDA , MEGUMI MORIYA
CPC classification number: G03G9/08711 , G03G9/0819
Abstract: A toner comprises a toner particle, wherein the toner contains a crystalline vinyl resin and an amorphous resin, a weight-average particle diameter of the toner is from 4.0 to 12.0 m, an endothermic quantity ΔH derived from the crystalline vinyl resin is from 10 to 70 J/g, and in an analysis by time-of-flight secondary ion mass spectrometry of the toner particle while under sputtering, with A(100) as the ion amount of a specific hydrocarbon over a sputtering time during which 100 nm of a polymethyl methacrylate standard sample film are shaved, the ion amount exhibits one or more peak values, and with A(dmax) as a maximum value from among the peak values, the above A(dmax) and A(100) satisfy the expression below.
1.5≤A(dmax)/A(100)≤30.0-
公开(公告)号：US20240142888A1
公开(公告)日：2024-05-02
申请号：US18497963
申请日：2023-10-30
Applicant: KYOCERA Document Solutions Inc.
Inventor： Takeo MIZOBE
CPC classification number: G03G9/09766 , G03G9/0819 , G03G9/09708 , G03G9/09725 , G03G15/0812
Abstract: A toner includes toner particles each including a toner mother particle and external additive particles attached to the surface of the toner mother particle. The external additive particles include fluororesin particles, specific external additive particles, and silica particles. The specific external additive particles contain barium titanate or strontium titanate. The silica particles have a detachment fraction of at least 5% by mass and no greater than 22% by mass. The detachment fraction of the silica particles is a percentage of a mass M2 of silica particles of the silica particles that have separated from the toner mother particles after ultrasonication to a mass M1 of the silica particles included in the toner particles before the ultrasonication. The ultrasonication is application of ultrasonic vibration to a mixed liquid of 5 g of the toner and 105.5 g of a nonionic surfactant-containing aqueous solution containing 0.55 g of a nonionic surfactant.
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