公开(公告)号：US20210216026A1

公开(公告)日：2021-07-15

申请号：US16923584

申请日：2020-07-08

Applicant: FUJI XEROX CO., LTD.

Inventor： Takashi INUKAI ,  Yasuaki HASHIMOTO ,  Daisuke NOGUCHI ,  Takuro WATANABE ,  Sakiko TAKEUCHI

IPC: G03G9/08 ,  G03G9/087 ,  G03G9/097 ,  G03G15/08 ,  G03G21/18

Abstract: An electrostatic image developing toner includes toner particles, layered compound particles, and inorganic particles. The proportion of irregular-shaped inorganic particles having a circularity of 0.5 or more and 0.9 or less and a size of 0.015 μm or more and 0.350 μm or less to the entire inorganic particles is 2% by number or more and 70% by number or less.

公开(公告)号：US20190204774A1

公开(公告)日：2019-07-04

申请号：US16296174

申请日：2019-03-07

Applicant: FUJI XEROX CO., LTD.

Inventor： Shintaro ANNO ,  Hiroaki SAIJO ,  Takuro WATANABE ,  Yasuaki HASHIMOTO ,  Fusako KIYONO

IPC: G03G21/00 ,  G03G9/113

CPC classification number: G03G21/0047 ,  G03G9/08795 ,  G03G9/08797 ,  G03G9/0902 ,  G03G9/0926 ,  G03G9/10 ,  G03G9/107 ,  G03G9/1131 ,  G03G9/1133 ,  G03G15/6585 ,  G03G21/0011

Abstract: A developer set includes a first developer and a second developer. The first developer includes a first toner and a first carrier. The second developer includes a second toner and a second carrier. The second toner is a toner that includes a flaky brilliant pigment, a toner that includes a white pigment, or a transparent toner. The second carrier has a higher volume resistivity than the first carrier and has a larger volume average particle diameter than the first carrier.

公开(公告)号：US20200301300A1

公开(公告)日：2020-09-24

申请号：US16727158

申请日：2019-12-26

Applicant: FUJI XEROX CO., LTD.

Inventor： Satoshi MIURA ,  Yoshimasa FUJIHARA ,  Shintaro ANNO ,  Daisuke NOGUCHI ,  Takuro WATANABE

IPC: G03G9/097 ,  G03G9/087 ,  G03G9/08 ,  G03G15/08 ,  G03G21/18

Abstract: An electrostatic charge image developing toner includes: toner particles including an amorphous resin and a crystalline polyester resin including a polycondensate of a linear dicarboxylic acid and a linear dialcohol having 2 to 12 carbon atoms; and an external additive including silica particles having a BET specific surface area of 100 m2/g or more. The electrostatic charge image developing toner satisfies the expression: 0.05≤ΔH2/ΔH1≤0.95, wherein ΔH1 (mW/g) is an endothermic energy amount based on an endothermic peak derived from the crystalline polyester resin in a first temperature increase process in differential scanning calorimetry according to ASTM D3418-8 (2008), and ΔH2 (mW/g) is an endothermic energy amount based on an endothermic peak derived from the crystalline polyester resin in a second temperature increase process in differential scanning calorimetry according to ASTM D3418-8 (2008).

公开(公告)号：US20170285504A1

公开(公告)日：2017-10-05

申请号：US15223810

申请日：2016-07-29

Applicant: FUJI XEROX CO., LTD.

Inventor： Shintaro ANNO ,  Motoko SAKAI ,  Takuro WATANABE ,  Shuji SATO

IPC: G03G9/00

CPC classification number: G03G9/1136 ,  G03G9/0902 ,  G03G9/0926 ,  G03G15/08 ,  G03G15/0865 ,  G03G2215/0607

Abstract: An electrostatic charge image developer includes a toner that includes a toner particle; and a carrier, wherein the toner particle contains a brilliant pigment, an exposed amount of the brilliant pigment contained in the toner particle is from 0.5% to 5%, the carrier has a core particle and a coating layer which covers a surface of the core particle, the coating layer contains a silicone resin and a siloxane oligomer, and a content of the siloxane oligomer is from 0.1 ppm to 500 ppm with respect to a total weight of the coating layer.

公开(公告)号：US20160246194A1

公开(公告)日：2016-08-25

申请号：US14819939

申请日：2015-08-06

Applicant: FUJI XEROX CO., LTD.

Inventor： Yosuke TSURUMI ,  Motoko SAKAI ,  Takuro WATANABE ,  Masaaki USAMI

IPC: G03G9/00

CPC classification number: G03G9/0823 ,  G03G9/107 ,  G03G9/1075

Abstract: An electrostatic charge image developer includes an electrostatic charge image developing carrier containing a ferrite particle and an electrostatic charge image developing toner containing metallic particles whose resistance is from 1010 Ωcm to 1013 Ωcm in an electric field of 10,000 V/cm, wherein the electrostatic charge image developing carrier satisfies the following formula (1): 0.9≦RB/RA≦1.0 (1), wherein RA represents the resistance of the electrostatic charge image developing carrier in an electric field of 2,400 V/cm, and RB represents the resistance of the electrostatic charge image developing carrier in an electric field of 19,200 V/cm.

Abstract translation: 静电荷图像显影剂包括在10,000V / cm的电场中含有铁氧体颗粒的静电荷图像显影载体和电阻为1010Ωcm至1013Ωcm的金属颗粒的静电荷图像显影调色剂，其中静电荷图像 显影载体满足下式（1）：0.9≤RB/RA≤1.0（1）其中RA表示静电荷图像显影载体在2,400V / cm的电场中的电阻，RB表示 静电荷图像显影载体在19,200V / cm的电场中。

公开(公告)号：US20200096888A1

公开(公告)日：2020-03-26

申请号：US16262946

申请日：2019-01-31

Applicant: FUJI XEROX CO.,LTD.

Inventor： Shintaro ANNO ,  Yosuke TSURUMI ,  Takuro WATANABE ,  Fusako KIYONO

IPC: G03G9/08 ,  G03G9/083 ,  G03G9/087 ,  G03G9/09

Abstract: An electrostatic charge image developer contains a carrier including a core and, on the core, a silicone resin-containing layer serving as a lower layer, and an acrylic resin-containing layer serving as an upper layer, or a carrier including a silicone resin-containing core and an acrylic resin-containing layer on the silicone resin-containing core; strontium titanate particles having an average primary particle size of 20 nm or more and 100 nm or less; and a toner. The percentage of a silicone resin exposed on a surface of the carrier is 0.5 area % or more and 20 area % or less.

公开(公告)号：US20190094739A1

公开(公告)日：2019-03-28

申请号：US15960565

申请日：2018-04-24

Applicant: FUJI XEROX CO.,LTD.

Inventor： Shintaro ANNO ,  Yasuaki HASHIMOTO ,  Takuro WATANABE ,  Hiroaki SAIJO ,  Fusako KIYONO

IPC: G03G15/01 ,  G03G9/08 ,  G03G9/107 ,  G03G9/113 ,  G03G9/087

Abstract: An image forming apparatus includes: a first image forming unit that includes a first image holding member and a first developing unit, the first developing unit accommodating a first developer that includes a first toner and a first carrier; a first transfer unit; a second image forming unit that is disposed downstream of the first image forming unit in a traveling direction of a transfer medium and includes a second image holding member and a second developing unit, the second developing unit accommodating a second developer that includes a second toner and a second carrier; and a second transfer unit, in which a volume resistivity of the first carrier is higher than a volume resistivity of the second carrier, and a volume average particle diameter of the first carrier is more than a volume average particle diameter of the second carrier.

公开(公告)号：US20160216623A1

公开(公告)日：2016-07-28

申请号：US14812248

申请日：2015-07-29

Applicant: FUJI XEROX CO., LTD.

Inventor： Motoko SAKAI ,  Shuji SATO ,  Yosuke TSURUMI ,  Masaaki USAMI ,  Takuro WATANABE

IPC: G03G9/00

CPC classification number: G03G9/0819 ,  G03G9/08755 ,  G03G9/09 ,  G03G9/0902 ,  G03G9/09791

Abstract: An electrostatic charge image developing toner includes a toner particles containing a binder resin and a metallic pigment and aliphatic acid metal salt particles as an external additive in an amount of from 0.1 parts by weight to 2.0 parts by weight with respect to 100 parts by weight of the toner particles, wherein the toner particles have an average circle equivalent diameter D longer than an average C of a maximum thickness of the toner particles.

Abstract translation: 静电荷图像显影调色剂包括含有粘合剂树脂和金属颜料的调色剂颗粒和作为外部添加剂的脂族酸金属盐颗粒，相对于100重量份的100重量份的 调色剂颗粒，其中调色剂颗粒具有比调色剂颗粒的最大厚度的平均C长的平均圆当量直径D。

公开(公告)号：US20210088924A1

公开(公告)日：2021-03-25

申请号：US16841670

申请日：2020-04-06

Applicant: FUJI XEROX CO., LTD.

Inventor： Shintaro ANNO ,  Takuro WATANABE ,  Yasuaki HASHIMOTO ,  Yasuo KADOKURA ,  Kazutsuna SASAKI ,  Jumpei IWASAKI

IPC: G03G9/107 ,  G03G9/113 ,  G03G9/08 ,  G03G9/083 ,  G03G9/087 ,  G03G21/18

Abstract: A carrier for electrostatic image development includes: a core material; and a coating resin layer that contains inorganic particles and covers the core material. The content of the inorganic particles is 10% by mass or more and 60% by mass or less based on the total mass of the coating resin layer. The volume average diameter D (μm) of the inorganic particles and the thickness T (μm) of the coating resin layer satisfy the following relational expression (1): 0.007≤D/T≤0.24.

公开(公告)号：US20190094787A1

公开(公告)日：2019-03-28

申请号：US15956756

申请日：2018-04-19

Applicant: FUJI XEROX CO., LTD.

Inventor： Shintaro ANNO ,  Hiroaki SAIJO ,  Takuro WATANABE ,  Yasuaki HASHIMOTO ,  Fusako KIYONO

IPC: G03G15/01 ,  G03G9/113

CPC classification number: G03G21/0047 ,  G03G9/08795 ,  G03G9/08797 ,  G03G9/0902 ,  G03G9/0926 ,  G03G9/10 ,  G03G9/107 ,  G03G9/1131 ,  G03G9/1133 ,  G03G15/6585 ,  G03G21/0011

Abstract: An image forming apparatus includes: a first image forming unit that includes a first image holding member and a first developing unit, the first developing unit accommodating a first developer that includes a first toner and a first carrier; a first transfer unit; a second image forming unit that is disposed downstream of the first image forming unit in a traveling direction of the transfer medium and includes a second image holding member and a second developing unit, the second developing unit accommodating a second developer that includes a second toner and a second carrier; and a second transfer unit, in which a volume resistivity of the first carrier is lower than a volume resistivity of the second carrier, and a volume average particle diameter of the first carrier is less than a volume average particle diameter of the second carrier.