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    Image forming apparatus
    1.
    发明授权
    Image forming apparatus 有权

    公开(公告)号：US10719041B2

    公开(公告)日：2020-07-21

    申请号：US16362702

    申请日：2019-03-25

    申请人： FUJI XEROX CO., LTD.

    发明人： Tatsuhiro Igarashi ,  Naoki Ota ,  Yusuke Fukuda ,  Makoto Kamisaki ,  Yasuhisa Morooka ,  Jun Sekiya ,  Teppei Yawada ,  Masataka Kuribayashi ,  Takafumi Koide ,  Katsuyuki Kitajima ,  Shota Oshima

    IPC分类号： G03G15/20 ,  G03G15/16

    摘要： An image forming apparatus includes an image holding member, a charging unit that charges the surface of the image holding member, an electrostatic charge image forming unit that forms an electrostatic charge image on the charged surface of the image holding member, a developing unit that includes a developer containing toner particles containing a release agent having a melting temperature ranging from 60° C. to 100° C. and that develops the electrostatic charge image on the surface of the image holding member with the developer to form a toner image, a transferring unit that transfers the toner image formed on the surface of the image holding member to the surface of a recording medium, and a fixing unit that fixes the toner image transferred to the surface of the recording medium, wherein the fixing unit includes an endless member to be heated, the endless member contacts with the toner image transferred to the surface of the recording medium; a pressure member that presses the endless member to form a nipping region between the pressure member and the endless member; a first heater that is in contact with the inner surface of the endless member in the nipping region to heat the endless member; a second heater that is disposed in contact with the endless member and downstream of the first heater in the operational direction of the endless member to heat the endless member; and a collection member that is disposed in the vicinity of the second heater so as to face the outer surface of the endless member and that collects particles.

    Image forming apparatus and process cartridge
    4.
    发明授权
    Image forming apparatus and process cartridge 有权

    公开(公告)号：US10990057B2

    公开(公告)日：2021-04-27

    申请号：US16822725

    申请日：2020-03-18

    申请人： FUJI XEROX CO., LTD.

    发明人： Jun Sekiya ,  Tatsuhiro Igarashi ,  Yasuhisa Morooka ,  Yuma Kubo

    IPC分类号： G03G21/00 ,  G03G9/097 ,  G03G9/087 ,  G03G9/08 ,  G03G15/02

    摘要： An image forming apparatus includes an image holding member; a charging unit; an electrostatic image forming unit; a developing unit that includes an electrostatic image developer including a toner and develops the electrostatic image formed on the surface of the image holding member with the electrostatic image developer to form a toner image; a transfer unit; and a cleaning unit that removes toner particles present on the surface of the image holding member. The cleaning unit includes a cleaning blade arranged to contact with the surface of the image holding member. The cleaning unit includes a cleaning blade A containing a contacting portion having a JIS-A hardness of 90° or more, or the cleaning unit includes a control unit B that controls a load with which the cleaning blade contacts with the image holding member, the control unit B controlling the load in a constant load mode. The toner includes toner particles; and silica particles having a number average particle size of 110 nm to 130 nm, a large-diameter-side number particle size distribution index (upper GSDp) of less than 1.080, and an average circularity of 0.94 to 0.98, wherein 80 number % or more of the silica particles have a circularity of 0.92 or more.

    IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE HAVING ELECTROSTATIC IMAGE DEVELOPING TONER WITH SPECIFIED VISCOSITY
    5.
    发明申请
    IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE HAVING ELECTROSTATIC IMAGE DEVELOPING TONER WITH SPECIFIED VISCOSITY 审中-公开

    公开(公告)号：US20200301311A1

    公开(公告)日：2020-09-24

    申请号：US16545593

    申请日：2019-08-20

    申请人： FUJI XEROX CO., LTD.

    发明人： Takafumi Koide ,  Yusuke Fukuda ,  Katsuyuki Kitajima ,  Yasuhisa Morooka

    IPC分类号： G03G15/08 ,  G03G9/087 ,  G03G9/09 ,  G03G21/18

    摘要： An image forming apparatus includes an image carrier; a charging unit that charges a surface of the image carrier; an electrostatic image forming unit that forms an electrostatic image on the charged surface of the image carrier; a developing unit that includes a container and a supply member and develops the electrostatic image formed on the surface of the image carrier to form a toner image, the container containing an electrostatic image developer that contains an electrostatic image developing toner and a carrier, the supply member having in a circumferential surface thereof plural grooves extending in a direction intersecting a direction of rotation of the supply member, the electrostatic image being developed with the electrostatic image developer; a transfer unit that transfers the toner image formed on the surface of the image carrier to a recording medium; and a fixing unit that fixes the toner image transferred to the recording medium. The electrostatic image developing toner satisfies the following inequalities: (ln η(T1)−ln η(T2))/(T1−T2)≤−0.14, (ln η(T2)−ln η(T3))/(T2−T3)≥−0.15, and (ln η(T1)−ln η(T2))/(T1−T2)

    Image forming apparatus
    6.
    发明授权
    Image forming apparatus 有权

    公开(公告)号：US09983517B2

    公开(公告)日：2018-05-29

    申请号：US15426824

    申请日：2017-02-07

    申请人： FUJI XEROX CO., LTD.

    发明人： Takafumi Koide ,  Naoki Ota ,  Masataka Kuribayashi ,  Yusuke Fukuda ,  Yasuhisa Morooka ,  Katsuyuki Kitajima

    IPC分类号： G03G9/08 ,  G03G15/16 ,  G03G9/087

    CPC分类号： G03G15/162 ,  G03G9/08755 ,  G03G9/08797 ,  G03G15/161

    摘要： An image forming apparatus includes a guide unit that guides at least one of an image holding member and an intermediate transfer member to a primary transfer position provided by a primary transfer unit such that a portion of the surface of the image holding member and a portion of the surface of the intermediate transfer member are disposed along with each other, wherein a toner contains a toner particle which contains a binder resin containing a crystalline polyester resin, a coloring agent and a releasing agent, and an external additive, and satisfies Expression: 2≤tan δP1≤2.5, wherein tan δP1 represents a maximum value of a mechanical loss tangent existing in a range where a complex elastic modulus is from 1×106 Pa to 1×108 Pa, which is measured at an angular frequency of 6.28 rad/sec and a strain amount of 0.3%.

    Image forming apparatus
    9.
    发明授权
    Image forming apparatus 有权

    公开(公告)号：US10539895B2

    公开(公告)日：2020-01-21

    申请号：US15944410

    申请日：2018-04-03

    申请人： FUJI XEROX CO., LTD.

    发明人： Makoto Kamisaki ,  Naoki Ota ,  Tatsuhiro Igarashi ,  Yasuhisa Morooka ,  Jun Sekiya

    IPC分类号： G03G9/087 ,  G03G15/095 ,  G03G15/04 ,  G03G9/08

    摘要： An image forming apparatus includes an image carrier that includes a conductive substrate, and a photosensitive layer and a surface protection layer; a developing device that includes an electrostatic image developer containing a toner, and develops the electrostatic image to form a toner image. The toner contains an amorphous polyester resin and has a weight average molecular weight Mw in a range of from 25,000 to 60,000, and a ratio of the weight average molecular weight Mw to a number average molecular weight Mn (Mw/Mn) is in a range of from 5 to 10. In the toner, a ratio of an absorbance for a wavelength of 1500 cm−1 to an absorbance for a wavelength of 720 cm−1 is 0.6 or less, and a ratio of an absorbance for a wavelength of 820 cm−1 to the absorbance for a wavelength of 720 cm−1 is 0.4 or less.