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

IPC: G03G9/08 ,  G03G15/08

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.

公开(公告)号：US11822286B2

公开(公告)日：2023-11-21

申请号：US17935721

申请日：2022-09-27

Applicant: CANON KABUSHIKI KAISHA

Inventor： Takashi Kenmoku ,  Kunihiko Sekido ,  Kozue Uratani ,  Koki Inoue ,  Tatsuya Saeki

IPC: G03G21/16 ,  G03G9/093 ,  G03G9/08 ,  G03G21/18 ,  G03G9/097

CPC classification number: G03G9/09328 ,  G03G9/0819 ,  G03G9/0823 ,  G03G9/0827 ,  G03G9/09708 ,  G03G21/1814

Abstract: Provided are a process cartridge and an electrophotographic apparatus each capable of suppressing an image defect (coarseness in a halftone image) caused by toner scattering in association with a charging failure that occurs when the process speed of the electrophotographic apparatus is further increased. The process cartridge includes: an electrophotographic photosensitive member; and a developing unit, which includes a toner storing portion that stores a toner, and which supplies the toner to a surface of the electrophotographic photosensitive member. The electrophotographic photosensitive member includes a surface protective layer containing an electroconductive particle in an appropriate amount, and the volume resistivity of the surface protective layer is controlled. As the toner, there is used a toner in which an organosilicon polymer is present on the surface of a toner particle, a silanol group is present in part of the organosilicon polymer, and the amount of the silanol group is controlled.

公开(公告)号：US20230350318A1

公开(公告)日：2023-11-02

申请号：US18299138

申请日：2023-04-12

Applicant: Konica Minolta, Inc.

Inventor： Keiji ARAI ,  Kentarou MOGI ,  Atsushi IIOKA ,  Minori MOMMA

IPC: G03G9/087 ,  G03G9/097 ,  G03G5/02 ,  G03G9/08

CPC classification number: G03G9/0825 ,  G03G5/0217 ,  G03G9/0827 ,  G03G9/08755 ,  G03G9/0975

Abstract: An image forming system uses: an organic photoreceptor; and a toner for electrostatic charge image development containing toner particles, wherein the organic photoreceptor has a protective layer containing a cured resin; the toner particle has a form in which at least one type of lubricant particle and at least one type of non-lubricant particle are contained or adhered on a surface of a plurality of convex portions or on a surface between the plurality of convex portions, of a toner base particle having the plurality of convex portions thereon; and an average spacing D1 of the convex portions on the surface of the toner base particle, a median diameter D2 of the lubricant particle having the smallest median diameter, and a median diameter D3 of the non-lubricant particle having the largest median diameter, satisfy the relationship of the following formula (1): Formula (1) D3≤D1≤D2.

公开(公告)号：US20230273541A1

公开(公告)日：2023-08-31

申请号：US18173408

申请日：2023-02-23

Applicant: CANON KABUSHIKI KAISHA

Inventor： MASATAKE TANAKA ,  TAIJI KATSURA ,  SHINTARO KAWAGUCHI ,  DAI NOZAKI

IPC: G03G9/097 ,  G03G9/08 ,  G03G9/087

CPC classification number: G03G9/09725 ,  G03G9/0827 ,  G03G9/08711 ,  G03G9/0821 ,  G03G9/09733 ,  G03G9/09708

Abstract: The present disclosure provides a toner excellent in low-temperature fixability and excellent in durability under harsh environments of high-temperature and high-humidity, and a method for producing the toner. The toner can contain: a toner particle containing a binder resin, wax, and an inorganic oxide particle; and an external additive, wherein the inorganic oxide particle contains, as a main component, an oxide of at least one element selected from the group consisting of Si, Mg, Al, Ti, and Sr; when a thin piece obtained by cutting the toner with a microtome is observed with a transmission electron microscope (TEM), the major axis A of the inorganic oxide particle is 0.10 to 3.00 μm; and in a wettability test of the toner with respect to a methanol/water mixed solvent, a methanol concentration at a transmittance of light having a wavelength of 780 nm of 50% is 5.0 to 30.0% by volume.

公开(公告)号：US20230273536A1

公开(公告)日：2023-08-31

申请号：US18173357

申请日：2023-02-23

Applicant: CANON KABUSHIKI KAISHA

Inventor： SHINTARO KAWAGUCHI ,  MASATAKE TANAKA ,  TAIJI KATSURA ,  DAI NOZAKI

IPC: G03G9/08 ,  G03G9/107

CPC classification number: G03G9/0821 ,  G03G9/10882 ,  G03G9/0827

Abstract: The subject toner includes a toner particle containing a binding resin and an inorganic oxide particle, wherein the inorganic oxide particle is a particle of an oxide containing at least one element selected from the group consisting of: Si; Mg; Al; Ti; and Sr, wherein, when an area of the inorganic oxide particle is represented by Sm and a sectional area of the toner is represented by St in a cross-section of the toner observed with a transmission electron microscope, Sm/St is 4.0% or more, wherein an area Sm of the inorganic oxide particle that occupies each of four regions obtained by dividing the cross-section of the toner by a long diameter of the toner and a perpendicular bisector of the long diameter has a standard deviation of 0.40 or more in the observed cross-section, and wherein the toner has an average circularity of 0.950 or more.

公开(公告)号：US11714363B2

公开(公告)日：2023-08-01

申请号：US17352672

申请日：2021-06-21

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kenji Ookubo ,  Yu Yoshida ,  Takashi Kenmoku ,  Taku Shimoda ,  Masashi Kawamura ,  Akane Masumoto ,  Takayuki Toyoda

IPC: G03G9/087 ,  G03G9/097 ,  G03G9/08

CPC classification number: G03G9/09725 ,  G03G9/0827 ,  G03G9/08773

Abstract: A toner comprising a toner particle comprising a resin A, and an external additive A, wherein the resin A is a resin represented by formula (1) below, the resin A is present at the surface of the toner particle, the external additive A is a fine particle containing silicon, the average value of the shape factor SF-1 of the external additive A is from 105 to 120, the average value of the shape factor SF-2 of the external additive A is from 100 to 130.

公开(公告)号：US20230161277A1

公开(公告)日：2023-05-25

申请号：US18046585

申请日：2022-10-14

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yuta Komiya ,  Kosuke Fukudome ,  Kenta Kamikura ,  Kozue Uratani

IPC: G03G9/08 ,  G03G9/093 ,  G03G9/087

CPC classification number: G03G9/0825 ,  G03G9/0827 ,  G03G9/08711 ,  G03G9/08728 ,  G03G9/08755 ,  G03G9/08764 ,  G03G9/09314 ,  G03G9/09357

Abstract: The toner comprises a toner particle that comprises a binder resin-containing core particle and a thermosetting resin-containing shell on the surface of the core particle, wherein the binder resin includes at least one of (i) a vinyl resin and a polyester resin and (ii) a hybrid resin in which a vinyl resin and a polyester resin are bonded; the polyester resin comprises in a main chain thereof a cyclic structure, and the content of the polyester resin in the tetrahydrofuran-soluble matter of the toner is at least 51 mass%; the vinyl resin comprises a prescribed monomer unit; the thermosetting resin is at least one resin selected from melamine resins, urea resins, and oxazoline group-bearing vinyl resins; and the average circularity of the toner is in a prescribed range.

公开(公告)号：US20230161276A1

公开(公告)日：2023-05-25

申请号：US17991846

申请日：2022-11-22

Applicant: Mitsuaki HIROSE ,  Daisuke INOUE ,  Yohichi KITAGAWA ,  Tsukiko TAKAHASHI ,  Kenji KOMITO ,  Akihiko MOKI

Inventor： Mitsuaki HIROSE ,  Daisuke INOUE ,  Yohichi KITAGAWA ,  Tsukiko TAKAHASHI ,  Kenji KOMITO ,  Akihiko MOKI

IPC: G03G9/08 ,  G03G9/087

CPC classification number: G03G9/0821 ,  G03G9/0804 ,  G03G9/0827 ,  G03G9/08728

Abstract: Provided is a toner including toner particles. Each of the toner particles includes a toner base particle including a binder resin and a release agent. The toner particles have an average circularity of 0.974 or greater and 0.985 or less. An arithmetic mean height Sa of surfaces of the toner particles is 45 nm or greater. The toner particles have a BET specific surface area of 1.3 m2/g or greater and 2.5 m2/g or less.

公开(公告)号：US20190146374A1

公开(公告)日：2019-05-16

申请号：US15809167

申请日：2017-11-10

Applicant: Palo Alto Research Center Incorporated

Inventor： David K. Biegelsen

IPC: G03G15/08 ,  G03G15/06 ,  G03G9/093 ,  G03G9/08

CPC classification number: G03G15/0808 ,  G03G9/0819 ,  G03G9/0827 ,  G03G9/093 ,  G03G9/09314 ,  G03G9/09378 ,  G03G9/09392 ,  G03G15/065 ,  G03G15/20 ,  G03G15/6585

Abstract: An electrographic printer includes an image carrier configured to receive ink capsules onto the surface of the image carrier. The image carrier is configured to transfer the ink capsules to a medium. The ink capsules comprise an ink having a viscosity in a range of about 100 cP to about and 100,000 cP and an encapsulant layer surrounding the ink. A roller configured to compress the ink capsules onto the medium such that the encapsulant layer ruptures and the ink adheres to the medium.

公开(公告)号：US20180314175A1

公开(公告)日：2018-11-01

申请号：US15948040

申请日：2018-04-09

Applicant: Konica Minolta, Inc.

Inventor： Michiaki Ishikawa ,  Hiroyuki Kozuru

IPC: G03G9/00 ,  G03G9/09 ,  G03G9/10

CPC classification number: G03G9/0902 ,  G03G9/0827 ,  G03G9/09791 ,  G03G9/10 ,  G03G13/013 ,  G03G15/0865 ,  G03G15/6585

Abstract: A white toner for electrostatic charge image development contains a toner particle that includes a toner base particle containing a binder resin, a white colorant, and a releasing agent, and an external additive, wherein the toner particle contains, as the external additive, a fatty acid metal salt particle having a volume-based median diameter in a range of 0.5 to 1.5 μm, and an average circularity of the toner particles is in a range of 0.870 to 0.950.