公开(公告)号：US07953355B2

公开(公告)日：2011-05-31

申请号：US12508255

申请日：2009-07-23

Applicant: Yuuji Sawai

Inventor： Yuuji Sawai

IPC: G03G15/01

CPC classification number: G03G15/162

Abstract: A multi-layer endless belt member, which can be incorporated in a transfer unit for use in an image forming apparatus, includes a base layer and a surface layer disposed on the base layer and having a higher resistivity and has a first resistivity of a first surface thereof and a second resistivity of a second surface thereof opposite the first surface different from the first resistivity. The second resistivity of the second surface ranges from approximately 9.0 to approximately 12.5 in a common logarithm value (log [Ω/square]) when measured after 500V is applied for 10 seconds. An amount of resistivity change in the first resistivity ranges from approximately 0.5 to approximately 1.5 after application of 100V and is 0.2 or smaller after application of 500V. An amount of resistivity change in the second resistivity is 0.1 or smaller after application of 100V and 500V.

Abstract translation: 可以结合在用于图像形成装置的转印单元中的多层环形带构件包括基底层和设置在基底层上并具有较高电阻率并具有第一电阻率的第一电阻率的表面层 其表面和与第一电阻率不同的与第一表面相反的第二表面的第二电阻率。 当在500V施加10秒后测量时，第二表面的第二电阻率以约9.0至约12.5的常用对数值（log [＆OHgr / / square]）。 在施加100V后，第一电阻率的电阻率变化量为约0.5至约1.5，并且在施加500V后为0.2或更小。 在施加100V和500V之后，第二电阻率的电阻率变化量为0.1或更小。

公开(公告)号：US07860438B2

公开(公告)日：2010-12-28

申请号：US11748511

申请日：2007-05-15

Applicant: Yuuji Sawai ,  Shinya Nakayama

Inventor： Yuuji Sawai ,  Shinya Nakayama

IPC: G03G15/01

CPC classification number: G03G15/0131 ,  G03G15/162 ,  G03G2215/0119 ,  G03G2215/1614

Abstract: An image forming apparatus includes an image carrier, an endless belt whose front surface contacts the image carrier to form a transfer nip, and a bias applying roller configured to apply a transfer bias to a back surface of the endless belt. An image is formed of a toner having an additive embedded rate of not less than 40 percent and including a mother particle having a binder resin and a colorant, and an external additive. The bias applying roller is located so as to satisfy a relationship, L>(A/2)+(B/2)+C, where A is a diameter of the image carrier, B is a diameter of the bias applying roller, C is a thickness of the endless belt, and L is a distance between centers of the image carrier and the bias applying roller on a virtual plane perpendicular to an axis direction of the image carrier.

Abstract translation: 图像形成装置包括图像载体，其前表面接触图像载体以形成转印压区的环形带，以及构造成向环形带的后表面施加转印偏压的偏压施加辊。 图像由具有不小于40％的添加剂嵌入速率的调色剂形成，并且包括具有粘合剂树脂和着色剂的母体颗粒和外部添加剂。 偏置施加辊位于满足L>（A / 2）+（B / 2）+ C的关系，其中A是图像载体的直径，B是偏压施加辊的直径，C 是环形带的厚度，L是垂直于图像载体的轴线方向的虚拟平面上的图像载体和偏置施加辊的中心之间的距离。

公开(公告)号：US07610004B2

公开(公告)日：2009-10-27

申请号：US11677484

申请日：2007-02-21

Applicant: Shinji Kato ,  Yuuji Sawai ,  Hiromi Ogiyama ,  Shin Kayahara ,  Atsushi Takehara ,  Ken Yoshida ,  Yoshihiro Fujiwara

Inventor： Shinji Kato ,  Yuuji Sawai ,  Hiromi Ogiyama ,  Shin Kayahara ,  Atsushi Takehara ,  Ken Yoshida ,  Yoshihiro Fujiwara

IPC: G03G15/01

CPC classification number: G03G15/5058 ,  G03G15/0131 ,  G03G2215/00029 ,  G03G2215/00059 ,  G03G2215/00063

Abstract: An image forming apparatus includes a reference-pattern detecting transfer-body, a reference-pattern detecting unit, and a condition changing unit. The reference-pattern detecting transfer-body directly transfers a reference pattern image formed on an intermediate transfer body without a recording material. The reference-pattern detecting unit detects an optical reference pattern with respect to the image transferred onto the reference-pattern detecting transfer-body. The condition changing unit changes the image forming conditions based on a result of detection.

Abstract translation: 图像形成装置包括参考图案检测转印体，参考图案检测单元和条件改变单元。 参考图案检测转印体直接传送形成在中间转印体上的参考图案图像而没有记录材料。 参考图案检测单元检测相对于转印到参考图案检测转印体上的图像的光学参考图案。 条件改变单元根据检测结果改变图像形成条件。

公开(公告)号：US07280792B2

公开(公告)日：2007-10-09

申请号：US10861440

申请日：2004-06-07

Applicant: Yuuji Sawai ,  Yoshihiro Fujiwara ,  Shin Kayahara ,  Hiromi Ogiyama ,  Atsushi Takehara ,  Ken Yoshida ,  Shinji Kato

Inventor： Yuuji Sawai ,  Yoshihiro Fujiwara ,  Shin Kayahara ,  Hiromi Ogiyama ,  Atsushi Takehara ,  Ken Yoshida ,  Shinji Kato

IPC: G03G15/16

CPC classification number: G03G15/1685

Abstract: A method for evaluating an electric resistance member of an image forming apparatus which can maintain good image quality, without the occurrence of transfer defects such as insufficient transfer, even in a long-term use. An intermediate transfer belt of the image forming apparatus, which is evaluated based on a fluctuation characteristic of the resistivity in a period of continuous voltage application, is used. The absolute value Δρs of the amount of changes in the surface resistivity of the intermediate transfer belt within 2 seconds to 100 seconds from the beginning of voltage application is 0.3 [Log(Ω/)] or less, when the surface resistivity ρs is measured by applying a voltage of 500 V. The absolute value Δρv of the amount of changes in the volume resistivity within 2 seconds to 100 seconds from the beginning of voltage application is 0.5 [Log(Ω·cm)] or less, when the volume resistivity ρv is measured by applying a voltage of 200 V.

Abstract translation: 一种图像形成装置的电阻部件的评价方法，即使在长期使用中也能够保持良好的图像质量，而不会发生转印不良等转印缺陷。 使用基于连续电压施加期间的电阻率的波动特性来评价的图像形成装置的中间转印带。 从施加电压开始的2秒至100秒内，中间转印带的表面电阻率变化量的绝对值Deltarhos为0.3 [Log（Ω/ img id =“CUSTOM-CHARACTER-00001”he = “3.56mm”wi =“2.46mm”file =“US07280792-20071009-P00001.TIF”alt =“自定义字符”img-content =“character”img-format =“tif”/>）] 通过施加500V的电压来测量表面电阻率rhos。从施加电压开始的2秒至100秒内的体积电阻率的变化量的绝对值Deltarhov为0.5 [Log（Ω·cm）]以下 当通过施加200V的电压来测量体积电阻率rhov时。

公开(公告)号：US06983121B2

公开(公告)日：2006-01-03

申请号：US10730077

申请日：2003-12-09

Applicant: Yuuji Sawai

Inventor： Yuuji Sawai

IPC: G03G15/00 ,  G03G15/16

CPC classification number: G03G15/6558 ,  G03G15/1665 ,  G03G15/167 ,  G03G2215/00409

Abstract: An image forming apparatus includes an intermediate transfer belt to which a toner image is transferred from an image carrier. A transfer roller contacts the intermediate transfer belt, forming a nip for image transfer. The transfer roller causes the toner image to be transferred from the intermediate transfer belt to a recording medium at the nip. A first and a second guide member cooperate to guide the recording medium to the nip. The end of the second guide member is positioned at the intermediate transfer belt side with respect to a line connecting a restriction point included in the first guide member and the inlet of the nip. A portion of the recording medium rearward of a portion entered the nip is bent in a convex configuration. The recording medium therefore surely remains in close contact with the intermediate transfer belt in a region where retransfer is apt to occur.

Abstract translation: 图像形成装置包括从图像载体传送调色剂图像的中间转印带。 转印辊接触中间转印带，形成用于图像转印的辊隙。 转印辊使得调色剂图像在辊隙处从中间转印带转印到记录介质上。 第一和第二引导构件协作以将记录介质引导到辊隙。 第二引导构件的端部相对于连接包括在第一引导构件中的限制点和夹持部的入口的线的中间转印带侧定位。 记录介质的一部分进入辊隙的部分向后弯曲成凸形。 因此，记录介质在转印容易发生的区域中确保与中间转印带紧密接触。

公开(公告)号：US20050147424A1

公开(公告)日：2005-07-07

申请号：US10868912

申请日：2004-06-17

Applicant: Shinji Kato ,  Yuuji Sawai ,  Hiromi Ogiyama ,  Shin Kayahara ,  Atsushi Takehara ,  Ken Yoshida ,  Yoshihiro Fujiwara

Inventor： Shinji Kato ,  Yuuji Sawai ,  Hiromi Ogiyama ,  Shin Kayahara ,  Atsushi Takehara ,  Ken Yoshida ,  Yoshihiro Fujiwara

IPC: G03G15/00

CPC classification number: G03G15/5058 ,  G03G15/0131 ,  G03G2215/00029 ,  G03G2215/00059 ,  G03G2215/00063

Abstract: An image forming apparatus includes a reference-pattern detecting transfer-body, a reference-pattern detecting unit, and a condition changing unit. The reference-pattern detecting transfer-body directly transfers a reference pattern image formed on an intermediate transfer body without a recording material. The reference-pattern detecting unit detects an optical reference pattern with respect to the image transferred onto the reference-pattern detecting transfer-body. The condition changing unit changes the image forming conditions based on a result of detection.

Abstract translation: 图像形成装置包括参考图案检测转印体，参考图案检测单元和条件改变单元。 参考图案检测转印体直接传送形成在中间转印体上的参考图案图像而没有记录材料。 参考图案检测单元检测相对于转印到参考图案检测转印体上的图像的光学参考图案。 条件改变单元根据检测结果改变图像形成条件。

公开(公告)号：US06741821B2

公开(公告)日：2004-05-25

申请号：US10178685

申请日：2002-06-25

Applicant: Akihiro Sugino ,  Yuuji Sawai ,  Mitsuru Takahashi ,  Kohki Katoh ,  Katsuya Kawagoe ,  Hiromi Ogiyama ,  Takahiro Tamiya

Inventor： Akihiro Sugino ,  Yuuji Sawai ,  Mitsuru Takahashi ,  Kohki Katoh ,  Katsuya Kawagoe ,  Hiromi Ogiyama ,  Takahiro Tamiya

IPC: G03G2116

CPC classification number: G03G15/0194 ,  G03G2215/00962 ,  G03G2215/0119 ,  G03G2221/183

Abstract: An image forming apparatus comprises a latent image support which supports an electrostatic latent image. A charging unit charges a surface of the image support. A latent image formation unit forms an electrostatic latent image on the image support surface. A developing unit develops the latent image with toner to form a toner image. A transfer unit transfers the toner image from the image support to a recording medium. A transport unit transports the recording medium so that the image support surface is countered to a surface of the recording medium. The surface of the image support has a coefficient of friction ranging from 0.1 to 0.7 according to Euler belt method, and a difference between a speed of the image support and a speed of the recording medium is below 1%, and the image support has an outermost surface containing a filler and a binder resin.

Abstract translation: 图像形成装置包括支持静电潜像的潜像载体。 充电单元对图像支撑体的表面充电。 潜像形成单元在图像载体表面上形成静电潜像。 显影单元用调色剂显影潜像以形成调色剂图像。 转印单元将调色剂图像从图像载体转印到记录介质。 传送单元传送记录介质，使得图像支撑表面被对抗到记录介质的表面。 图像支撑体的表面根据欧拉带法具有0.1至0.7的摩擦系数，并且图像支持的速度与记录介质的速度之间的差异低于1％，并且图像支持具有 最外表面含有填料和粘结剂树脂。

公开(公告)号：US08014708B2

公开(公告)日：2011-09-06

申请号：US12329127

申请日：2008-12-05

Applicant: Yuuji Sawai

Inventor： Yuuji Sawai

IPC: G03G15/01

CPC classification number: G03G15/162 ,  G03G2215/0129 ,  G03G2215/1614 ,  G03G2215/1623

Abstract: A multi-layer endless belt member with a high-resistance surface layer for use in an image forming apparatus. A volume resistivity thereof ranges from approximately 8.0 to approximately 11.0 in log [Ω·cm]. An amount of resistivity change of a first surface thereof is greater than an amount of resistivity change of a second surface thereof by 0.05 or greater in log [Ω/square], where the amount of resistivity change of the first surface indicates a difference between surface resistivity values measured after a given voltage is applied for 1 second and for 100 seconds on the first surface thereof and the amount of resistivity change of the second surface indicates a difference between surface resistivity values measured after a given voltage is applied for 1 second and for 100 seconds on the second surface thereof.

Abstract translation: 一种用于图像形成装置的具有高电阻表面层的多层环形带构件。 体积电阻率的范围为约8.0〜约11.0，以[log（OHgr·cm）计）。 其第一表面的电阻率变化量大于其第二表面的电阻率变化量在log [OHggr / square square]时为0.05或更大，其中第一表面的电阻率变化量表示第 在给定电压施加1秒之后测量的表面电阻率值，并且在其第一表面上施加100秒，并且第二表面的电阻率变化量表示在施加给定电压1秒后测量的表面电阻率值之间的差异，以及 在其第二表面上持续100秒。

公开(公告)号：US07809314B2

公开(公告)日：2010-10-05

申请号：US11608599

申请日：2006-12-08

Applicant: Yuuji Sawai

Inventor： Yuuji Sawai

IPC: G03G15/00

CPC classification number: G03G15/0131 ,  G03G15/1675 ,  G03G2215/0119

Abstract: An image forming apparatus includes an image bearing member, supporting rollers, a belt-like-shaped medium, a primary transfer member, secondary transfer rollers, and a grounded conductive roller. The image bearing member forms a toner image at a predetermined process speed. The belt-shaped medium has a charge voltage. The primary transfer member sequentially transfers the toner image onto the belt-like-shaped medium and the secondary transfer member transfers the toner image onto a recording sheet. The conductive roller is arranged in contact with the belt-shaped medium for a predetermined wrapping length. A relationship Tb

Abstract translation: 图像形成装置包括图像承载部件，支撑辊，带状形状的介质，一次转印部件，二次转印辊和接地的导电辊。 图像承载部件以预定的处理速度形成调色剂图像。 带状介质具有充电电压。 一次传送构件将调色剂图像顺序地转印到带状形状的介质上，并且二次转印部件将调色剂图像转印到记录片材上。 导电辊被布置成与带状介质接触以预定的包裹长度。 满足Tb

公开(公告)号：US07742729B2

公开(公告)日：2010-06-22

申请号：US11759008

申请日：2007-06-06

Applicant: Yuuji Sawai

Inventor： Yuuji Sawai

IPC: G03G15/01 ,  G03G15/14

CPC classification number: G03G15/1605 ,  G03G15/1685 ,  G03G2215/00649

Abstract: A transfer device including a first combination including an intermediate transfer medium and a transfer member applying a transfer bias, and/or a second combination including an intermediate transfer medium, a second transfer member applying a second transfer bias, and an opposing member configured to transfer the toner image on the intermediate transfer medium to a receiving material at a second transfer nip. When the first combination is subjected to 60-second application of a voltage of 1 kV, followed by discharging, 300 times, the absolute value of logarithmic difference between first and 300th combined volume resistances is not greater than 0.8 [log(Ω)]. When the second combination is subjected to 60-second application of a voltage of −1 kV, followed by discharging, 300 times, the absolute value of logarithmic difference between the first and 300th combined volume resistances is not greater than 0.5 [log(Ω)].

Abstract translation: 一种转印装置，包括包括中间转印介质和施加转印偏压的转印部件的第一组合，和/或包括中间转印介质的第二组合，施加第二转印偏压的第二转印部件和构造成转印 中间转印介质上的调色剂图像在第二转印间隙处的接收材料。 当第一组合施加1kV的电压，随后放电300次时，第一和第三十次组合体积电阻之间的对数差的绝对值不大于0.8 [log（＆OHgr）]] 。 当第二组合施加-1kV的电压，随后放电300次时，第一和第300组合体积电阻之间的对数差的绝对值不大于0.5 [log（＆OHgr; ）]。