公开(公告)号：US20200026210A1

公开(公告)日：2020-01-23

申请号：US16398867

申请日：2019-04-30

申请人： Yu HIRAI ,  Masayuki Ishii ,  Hyo Shu ,  Masayuki Kakimoto ,  Yoshitaka Sekiguchi ,  Shohta Kobayashi ,  Shinya Hanatani ,  Kohtaroh Ogino ,  Yasuaki Iwamoto

发明人： Yu HIRAI ,  Masayuki Ishii ,  Hyo Shu ,  Masayuki Kakimoto ,  Yoshitaka Sekiguchi ,  Shohta Kobayashi ,  Shinya Hanatani ,  Kohtaroh Ogino ,  Yasuaki Iwamoto

IPC分类号： G03G9/09 ,  G03G15/08 ,  G03G9/087 ,  G03G9/097 ,  G03G9/08

摘要： A toner is provided. The toner comprises a binder resin, a metal-containing azo dye, and a quaternary ammonium salt, has an average circularity of from 0.85 to 0.95, and is free of a tin compound having Sn—C bond.

公开(公告)号：US11036156B2

公开(公告)日：2021-06-15

申请号：US16778268

申请日：2020-01-31

申请人： Kohtaroh Ogino ,  Masayuki Ishii ,  Masayuki Kakimoto ,  Shohichi Sugimoto

发明人： Kohtaroh Ogino ,  Masayuki Ishii ,  Masayuki Kakimoto ,  Shohichi Sugimoto

IPC分类号： G03G9/08 ,  G03G9/097 ,  G03G15/08 ,  G03G9/09 ,  G03G9/087

摘要： A toner is provided which includes: a toner base particle including a binder resin; and an external additive including inorganic particles. A particle size distribution of primary particles of the inorganic particles has a plurality of peaks in the range of from 5 nm through 50 nm. The particle size distribution of the primary particles satisfies all of expressions (1) to (3) below: n1d>n2d  (1); 10

公开(公告)号：US10599059B2

公开(公告)日：2020-03-24

申请号：US16293691

申请日：2019-03-06

申请人： Namie Suzuki ,  Kazumi Suzuki ,  Hisashi Nakajima ,  Yoshitaka Yamauchi ,  Kohtaroh Ogino ,  Akihiro Kaneko

发明人： Namie Suzuki ,  Kazumi Suzuki ,  Hisashi Nakajima ,  Yoshitaka Yamauchi ,  Kohtaroh Ogino ,  Akihiro Kaneko

IPC分类号： G03G9/08 ,  G03G9/087 ,  G03G15/08 ,  G03G15/09 ,  G03G9/097 ,  G03G9/093

摘要： A toner is provided. The toner comprises mother particles and an external additive covering the mother particles. The mother particles comprise a binder resin, and the external additive comprises inorganic particles. The inorganic particles comprise small-size inorganic particles having an equivalent circle diameter of from 30 to 70 nm and large-size inorganic particles having an equivalent circle diameter of from 150 to 200 nm and a circularity of 0.85 or more. The large-size inorganic particles are 20 to 70 in number per 100 μm2 image area of the toner observed with a field-emission scanning electron microscope.

公开(公告)号：US20240280921A1

公开(公告)日：2024-08-22

申请号：US18439850

申请日：2024-02-13

申请人： Kohtaroh Ogino ,  Yoshitaka Yamauchi ,  Ayaka Mori

发明人： Kohtaroh Ogino ,  Yoshitaka Yamauchi ,  Ayaka Mori

IPC分类号： G03G9/113 ,  G03G9/087

CPC分类号： G03G9/1139 ,  G03G9/08708 ,  G03G9/08755 ,  G03G9/1136 ,  G03G2215/0607

摘要： A two-component developing agent contains a toner that contains a pulverized toner, the pulverized toner containing at least one type of polyester resin, a styrene-based resin or an aromatic petroleum resin, and Fisher-Tropsch wax, and a carrier that contains a silicone resin covering layer containing conductive fine powder.

公开(公告)号：US10061220B2

公开(公告)日：2018-08-28

申请号：US15327700

申请日：2015-07-17

申请人： Kohtaroh Ogino ,  Tohru Moriya ,  Tomomi Suzuki

发明人： Kohtaroh Ogino ,  Tohru Moriya ,  Tomomi Suzuki

IPC分类号： G03G9/097 ,  G03G9/087 ,  G03G9/09 ,  G03G15/08

CPC分类号： G03G9/09725 ,  G03G9/081 ,  G03G9/08711 ,  G03G9/08755 ,  G03G9/08795 ,  G03G9/08797 ,  G03G9/0902 ,  G03G9/0904 ,  G03G9/0906 ,  G03G9/09708 ,  G03G15/08

摘要： A toner, containing: a binder resin; and kaolinite, wherein the toner has a molecular weight distribution having a main peak in a range of 1,000 to 10,000, and a half value width of the main peak is 8,000 to 30,000, where the molecular weight distribution is obtained by gel permeation chromatography (GPC) of THF soluble matter of the toner, and wherein the toner contains the kaolinite in an amount of 5% by mass to 35% by mass.

公开(公告)号：US10310399B2

公开(公告)日：2019-06-04

申请号：US15536531

申请日：2015-11-26

申请人： Natsuko Matsushita ,  Tomomi Suzuki ,  Kohtaroh Ogino ,  Tohru Moriya

发明人： Natsuko Matsushita ,  Tomomi Suzuki ,  Kohtaroh Ogino ,  Tohru Moriya

IPC分类号： G03G9/08 ,  G03G9/087 ,  G03G15/08

摘要： Provided is a toner including at least a binder resin, and having peak ratio W/R of from 0.20 to 0.70 when measured with FT-IR according to ATR method, W/R being a ratio of height W of maximum spectral peak attributed to bisphenol A skeleton of the toner and observed at from 1,480 cm−1 to 1,520 cm−1 to height R of maximum spectral peak attributed to carbonyl group of the toner and observed at from 1,700 cm−1 to 1,750 cm−1, wherein molecular weight distribution of the toner obtained by GPC of THF-soluble component of the toner has main peak in a range of from 1,000 to 10,000, half value width of the molecular weight distribution is a molecular weight of 20,000 or less, and content of a THF-insoluble component in the toner is from 5% by mass to 40% by mass.

公开(公告)号：US20180267418A1

公开(公告)日：2018-09-20

申请号：US15911285

申请日：2018-03-05

申请人： Kohtaroh Ogino ,  Yoshitaka Yamauchi ,  Akihiro Kaneko ,  Kazumi Suzuki ,  Hisashi Nakajima

发明人： Kohtaroh Ogino ,  Yoshitaka Yamauchi ,  Akihiro Kaneko ,  Kazumi Suzuki ,  Hisashi Nakajima

IPC分类号： G03G9/087 ,  G03G15/08 ,  G03G9/08 ,  G03G21/18

CPC分类号： G03G9/08755 ,  G03G9/081 ,  G03G9/0819 ,  G03G9/08782 ,  G03G9/08795 ,  G03G9/08797 ,  G03G15/0806 ,  G03G15/0822 ,  G03G21/18

摘要： A toner is provided. The toner includes at least two types of polyester resins and a release agent. When the toner is subjected to a dynamic viscoelasticity measurement at a frequency of 6.28 rad/sec to obtain a temperature-dependent curve of loss tangent (tan δ), and the temperature-dependent curve is differentiated one time with temperature, a resulting curve has a maximum value of 0.07 or more and a minimum value of 0.025 or less within a temperature range of from 85° C. to 110° C. When the toner is subjected to a differential scanning calorimetry (DSC), an endothermic amount measured in a first temperature rising in the DSC is 3.5 J/g or less within a temperature range of from 85° C. to 120° C.

公开(公告)号：US09904190B2

公开(公告)日：2018-02-27

申请号：US15126337

申请日：2015-02-02

申请人： Tatsuya Dan ,  Tohru Moriya ,  Tomomi Suzuki ,  Kohtaroh Ogino

发明人： Tatsuya Dan ,  Tohru Moriya ,  Tomomi Suzuki ,  Kohtaroh Ogino

IPC分类号： G03G9/087 ,  G03G9/08 ,  G03G9/097 ,  G03G9/09 ,  G03G15/08

CPC分类号： G03G9/0821 ,  G03G9/081 ,  G03G9/08711 ,  G03G9/08755 ,  G03G9/08795 ,  G03G9/0904 ,  G03G9/09708 ,  G03G9/09783 ,  G03G15/0865

摘要： A toner, including: a binder resin; and calcium carbonate, wherein the toner has a molecular weight distribution having a main peak in a range of 1,000 to 10,000, and a half value width of the main peak is 8,000 to 30,000, where the molecular weight distribution is obtained by GPC (gel permeation chromatography) of THF soluble matter of the toner, and wherein the toner contains the calcium carbonate in an amount of 5% by mass to 35% by mass.