公开(公告)号：US07630656B2

公开(公告)日：2009-12-08

申请号：US12001888

申请日：2007-12-12

申请人： Hirohisa Endou ,  Eiji Nimura ,  Shingo Sakato ,  Toyotsune Inoue

发明人： Hirohisa Endou ,  Eiji Nimura ,  Shingo Sakato ,  Toyotsune Inoue

IPC分类号： G03G15/08 ,  G03G15/00

CPC分类号： G03G15/553 ,  G03G15/0806 ,  G03G15/556 ,  G03G2221/0026

摘要： To provide an image forming device that is capable of preventing deterioration of the image quality through preventing deterioration of the toner even if frequency of making a copy is low. The image forming device includes: a developing part having a developing roller for achieving development by electrostatically attaching a toner onto an electrostatic latent image formed on a photoreceptor; a transferring part for transferring a developed toner image to a paper; and a cleaner part for removing and collecting the toner remained on the photoreceptor after transferring, wherein the developing roller is rotary-driven at a lower speed than a speed of development under a standby state. The image forming device includes a standby-state refresh control part for forcibly consuming an amount of the toner that is calculated based on accumulated time of the low-speed rotary drive.

摘要翻译： 为了提供一种图像形成装置，其能够通过防止调色剂的劣化而防止图像质量的劣化，即使制作复印件的频率较低。 图像形成装置包括：显影部，具有用于通过将调色剂静电附着到形成在感光体上的静电潜像上来实现显影的显影辊; 用于将显影的调色剂图像转印到纸张上的转印部件; 以及用于去除和收集转印后感光体上残留的调色剂的清洁器部件，其中显影辊以等待状态下的显影速度低速旋转驱动。 图像形成装置包括用于强制地消耗基于低速旋转驱动器的累积时间计算的调色剂量的待机状态刷新控制部分。

公开(公告)号：US06174639B1

公开(公告)日：2001-01-16

申请号：US09540542

申请日：2000-03-31

申请人： Yoshitake Shimizu ,  Takahiro Ishihara ,  Hiroshi Shimoyama ,  Toyotsune Inoue ,  Takashi Nishino ,  Kazuya Nagao ,  Kenshi Matsui ,  Takayuki Itakura ,  Norio Horikami

发明人： Yoshitake Shimizu ,  Takahiro Ishihara ,  Hiroshi Shimoyama ,  Toyotsune Inoue ,  Takashi Nishino ,  Kazuya Nagao ,  Kenshi Matsui ,  Takayuki Itakura ,  Norio Horikami

IPC分类号： G03G9097

CPC分类号： G03G9/08755 ,  G03G9/08764 ,  G03G9/08795 ,  G03G9/0975 ,  Y10S430/104

摘要： Disclosed are a positive charging color toner comprising a coloring agent and a positive charging electric charge controlling material in a fixing resin, wherein the fixing rein is an urethane-modified polyester resin having an acid value of not more than 5 KOHmg/g, a hydroxyl value of not more than 9 KOHmg/g, a weight-average molecular weight of 8,000 to 120,000 and a number-average molecular weight of 2,000 to 70,000, and the positive charging electric charge controlling material is (a) a quaternary ammonium salt having a melting point of not less than 200° C., or (b) a styrene-acrylate copolymer having a trisubstituted amminio group and a glass transition temperature Tg of not less than 55° C.; and a positive charging one-component non-magnetic color toner comprising a polyester resin having an acid value of not more than 5 KOHmg/g, a hydroxyl value of not more than 9 KOHmg/g, a weight-average molecular weight of 7000 to 20,000 and a number-average molecular weight of 1,000 to 6,000, a polyolefine (releasing agent) having an acid value of not more than 10 KOHmg/g and a weight-average molecular weight of 8,000 to 15,000, a proportion of a polyolefine having a particle diameter of not less than 1.5 &mgr;m among polyolefines dispersed in the toner being within 1% in terms of the number, a coloring agent and a positive charging electric charge controlling resin.

摘要翻译： 公开了一种在定影树脂中包含着色剂和正电荷电荷控制材料的正电荷彩色调色剂，其中定影重量为酸值不大于5KOHmg / g的氨基甲酸酯改性聚酯树脂，羟基 值不超过9KOHmg / g，重均分子量为8,000至120,000，数均分子量为2,000至70,000，并且正电荷电荷控制材料为（a）季铵盐，其具有 熔点不低于200℃，或（b）具有三取代氨基的苯乙烯 - 丙烯酸酯共聚物，玻璃化转变温度Tg不低于55℃; 以及含有酸值为5KOHmg / g以下的聚酯树脂，羟值为9KOHmg / g以下的正电荷单组分非磁性彩色调色剂，重均分子量为7000〜 20,000，数均分子量为1,000〜6,000，酸值不大于10KOHmg / g，重均分子量为8,000〜15,000的聚烯烃（脱模剂），具有 分散在调色剂中的聚烯烃中的粒径不小于1.5μm的粒径在数量之外在1％以内，着色剂和正电荷电荷控制树脂。

公开(公告)号：US20080298847A1

公开(公告)日：2008-12-04

申请号：US12127151

申请日：2008-05-27

申请人： Toyotsune Inoue ,  Takahisa Nakaue ,  Akihiro Watanabe ,  Masashi Fujishima ,  Shoichi Sakata ,  Yukihiro Mori

发明人： Toyotsune Inoue ,  Takahisa Nakaue ,  Akihiro Watanabe ,  Masashi Fujishima ,  Shoichi Sakata ,  Yukihiro Mori

IPC分类号： G03G15/09

CPC分类号： G03G15/095 ,  G03G15/0815

摘要： A developing device uses a two-component developer including at least carriers and toners. The toners are supplied to an image bearing member bearing an electrostatic latent image so that a toner image is developed from the electrostatic latent image. The developing device has a developing roller arranged to oppose the image bearing member; and a magnetic roller arranged to oppose the developing roller. The magnetic roller retains the two-component developer to supply toners to the developing roller. The developing roller and the magnetic roller are rotationally driven in directions to be opposite from one another at an opposed position, and a magnetic pole of the magnetic roller and a magnetic pole of the developing roller have magnetic polarities different from one another at the opposed position. A surface roughness of the magnetic roller is greater than a surface roughness of the developing roller.

摘要翻译： 显影装置使用包括至少载体和调色剂的双组分显影剂。 将调色剂供应到承载静电潜像的图像承载部件，使得调色剂图像从静电潜像显影。 显影装置具有布置成与图像承载部件相对的显影辊; 以及布置成与显影辊相对的磁辊。 磁性辊保持双组分显影剂以将调色剂供应到显影辊。 显影辊和磁性辊在相对位置上被相互旋转的方向旋转驱动，磁性辊的磁极和显影辊的磁极在相对位置处具有彼此不同的磁极性 。 磁辊的表面粗糙度大于显影辊的表面粗糙度。

公开(公告)号：US20080232862A1

公开(公告)日：2008-09-25

申请号：US12051186

申请日：2008-03-19

申请人： Masashi Fujishima ,  Shoichi Sakata ,  Takahisa Nakaue ,  Toyotsune Inoue ,  Akihiro Watanabe ,  Yukihiro Mori

发明人： Masashi Fujishima ,  Shoichi Sakata ,  Takahisa Nakaue ,  Toyotsune Inoue ,  Akihiro Watanabe ,  Yukihiro Mori

IPC分类号： G03G15/08

CPC分类号： G03G15/0921 ,  G03G15/0818 ,  G03G2215/0609

摘要： An image forming apparatus has a photoconductive member, and a developing roller develops a latent image on the photoconductive member by a first alternating-current bias in the form of a rectangular wave. The following relationships are satisfied in calculating the duty ratio (D1) of the first alternating-current bias using an application period of voltage in a direction to transfer the toner from the developing roller towards the photoconductive member as a positive period: a CV value in the number particle size distribution of the toner is ≦25%, 4 μm≦Dt≦7 μm, 105 Ω·cm≦pv≦109 QΩcm, 0.4 μm≦Ra≦1.5 μm, and 35%≦D1≦75%. where Dt denotes the volume average particle diameter of the toner, pv denotes the intrinsic resistance value of a developing roller surface, Ra denotes the arithmetic average roughness of the developing roller surface.

摘要翻译： 图像形成装置具有感光体，并且显影辊通过矩形波形式的第一交流偏压在感光体上显影潜像。 在使用调色剂从显影辊向感光体传送调色剂的方向上，使用电压施加期间计算第一交流偏压的占空比（D 1）为以下关系：CV值 在调色剂的数量粒度分布为<= 25％，4μm<= Dt <=7μm，10±5cm -1 = 10 < > QOmegacm，0.4mg

公开(公告)号：US20080226320A1

公开(公告)日：2008-09-18

申请号：US12042684

申请日：2008-03-05

申请人： Shoichi Sakata ,  Takahisa Nakaue ,  Toyotsune Inoue ,  Akihiro Watanabe ,  Masashi Fujishima ,  Yukihiro Mori

发明人： Shoichi Sakata ,  Takahisa Nakaue ,  Toyotsune Inoue ,  Akihiro Watanabe ,  Masashi Fujishima ,  Yukihiro Mori

IPC分类号： G03G15/06

CPC分类号： G03G15/065

摘要： A developing unit has a voltage-applicator (80) to apply a developing bias voltage to a developing roller (72). The voltage-applicator (80) applies the developing bias voltage for a first duration to apply an AC voltage having a rectangular waveform, and a second duration to stop applying the AC voltage. The AC voltage has a duty ratio of 50% or more in a direction for causing toner to develop an electrostatic latent image. The number of cycles of the AC voltage in the first duration is two or more, and the AC voltage has a voltage in a direction for pulling the toner back to the developing roller, just before transition to the second duration. The developing unit suppresses occurrence of image unevenness due to a fluctuation in developing gap. Thus, an image forming apparatus equipped with the developing unit forms a high-quality image while suppressing image unevenness.

摘要翻译： 显影单元具有向显影辊（72）施加显影偏压的电压施加器（80）。 电压施加器（80）施加显影偏压第一持续时间以施加具有矩形波形的交流电压和第二持续时间以停止施加AC电压。 AC电压在使调色剂显影静电潜像的方向上具有50％以上的占空比。 在第一持续时间内的交流电压的周期数为两个或更多个，并且在转换到第二持续时间之前，AC电压具有用于将调色剂拖回显影辊的方向上的电压。 显影单元抑制由于显影间隙的波动引起的图像不均匀的发生。 因此，配备有显影单元的图像形成装置在抑制图像不均匀的同时形成高质量图像。

公开(公告)号：US07826781B2

公开(公告)日：2010-11-02

申请号：US12051186

申请日：2008-03-19

申请人： Masashi Fujishima ,  Shoichi Sakata ,  Takahisa Nakaue ,  Toyotsune Inoue ,  Akihiro Watanabe ,  Yukihiro Mori

发明人： Masashi Fujishima ,  Shoichi Sakata ,  Takahisa Nakaue ,  Toyotsune Inoue ,  Akihiro Watanabe ,  Yukihiro Mori

IPC分类号： G03G15/09

CPC分类号： G03G15/0921 ,  G03G15/0818 ,  G03G2215/0609

摘要： An image forming apparatus has a photoconductive member, and a developing roller develops a latent image on the photoconductive member by a first alternating-current bias in the form of a rectangular wave. The following relationships are satisfied in calculating the duty ratio (D1) of the first alternating-current bias using an application period of voltage in a direction to transfer the toner from the developing roller towards the photoconductive member as a positive period: a CV value in the number particle size distribution of the toner is ≦25%, 4 μm≦Dt≦7 μm, 105 Ω·cm≦pv≦109 Ω·cm, 0.4 μm≦Ra≦1.5 μm, and 35%≦D1≦75%. where Dt denotes the volume average particle diameter of the toner, pv denotes the intrinsic resistance value of a developing roller surface, Ra denotes the arithmetic average roughness of the developing roller surface.

摘要翻译： 图像形成装置具有感光体，并且显影辊通过矩形波形式的第一交流偏压在感光体上显影潜像。 在使用调色剂从显影辊朝向感光体转印调色剂的方向的电压施加期间，计算第一交流偏压的占空比（D1）为以下关系：CV值 调色剂的数量粒度分布为25％，4μm＆nlE; Dt＆nlE;7μm，105＆OHgr;·cm＆nlE; pv＆nlE; 109＆OHgr;·cm，0.4μm和nlE; Ra＆nlE;1.5μm和35％ ; 75％。 其中Dt表示调色剂的体积平均粒径，pv表示显影辊表面的固有电阻值，Ra表示显影辊表面的算术平均粗糙度。

公开(公告)号：US20080232859A1

公开(公告)日：2008-09-25

申请号：US12050219

申请日：2008-03-18

申请人： Shoichi Sakata ,  Takahisa Nakaue ,  Toyotsune Inoue ,  Akihiro Watanabe ,  Masashi Fujishima ,  Yukihiro Mori

发明人： Shoichi Sakata ,  Takahisa Nakaue ,  Toyotsune Inoue ,  Akihiro Watanabe ,  Masashi Fujishima ,  Yukihiro Mori

IPC分类号： G03G15/09

CPC分类号： G03G15/0928 ,  G03G15/0907

摘要： An image forming apparatus has a photoconductive member on which a latent image is to be formed, a developing roller for developing the latent image on the photoconductive member by a first bias. A magnetic roller forms a magnetic brush thereon with a two-component developer and forms a thin toner layer on the developing roller by a second bias. The developing roller is aluminum with a surface treated for high resistance. The thickness (T) of the toner layer and the duty ratio (D1) of the first alternating-current bias satisfy relationships of the following equations for calculating the duty ratio (D1) using an application period of a voltage in a direction to transfer the toner from the developing roller towards the photoconductive member as a positive period: 7 μm≦T≦13 μm, and 35%≦D1≦70%.

摘要翻译： 图像形成装置具有要在其上形成潜像的感光体，用于通过第一偏压在感光体上显影潜像的显影辊。 磁性辊在其上用双组分显影剂形成磁刷，并通过第二偏压在显影辊上形成薄的调色剂层。 显影辊是具有高电阻表面处理的铝。 调色剂层的厚度（T）和第一交流偏置的占空比（D 1）满足以下等式的关系，用于使用电压在施加方向上的施加周期来计算占空比（D 1） 将调色剂从显影辊朝着感光体转移到正周期：<？in-line-formula description =“In-line Formulas”end =“lead”？> 7 mum <= T <= 13 mum， ？in-line-formula description =“In-line Formulas”end =“tail”？> <？in-line-formula description =“In-line Formulas”end =“lead”？> 35％<= D 1 < = 70％。<？in-line-formula description =“In-line Formulas”end =“tail”？>

公开(公告)号：US20060286479A1

公开(公告)日：2006-12-21

申请号：US11452977

申请日：2006-06-15

申请人： Toyotsune Inoue

发明人： Toyotsune Inoue

IPC分类号： G03G9/087

CPC分类号： G03G9/0904 ,  G03G9/081 ,  G03G9/0821 ,  G03G9/08755 ,  G03G9/08782 ,  G03G9/08791 ,  G03G9/08793

摘要： A toner is provided, which is suitable for developing an electrostatic latent image in an image forming apparatus based on an electrophotographic method or an electrostatic recording method, and ensures low-temperature fixability while suppressing hot offset. The toner comprises a binder resin and a colorant. The binder resin comprises a urethane-modified polyester resin having a tetrahydrofuran insoluble content of not higher than 10% by weight. The toner has a melt viscosity η95 of 1.0×104 to 1.0×106 Pas at 95° C. The toner has a ratio A (η92/η100) of a melt viscosity η92 at 92° C. to a melt viscosity η100 at 100° C. and a ratio B (η100/η110) of a melt viscosity η100 at 100° C. to a melt viscosity η110 at 110° C. which satisfy the following expression (i): 0.45

摘要翻译： 提供了一种调色剂，其适用于基于电子照相方法或静电记录方法在图像形成装置中显影静电潜像，并且在抑制热偏移的同时确保低温定影性。 调色剂包括粘合剂树脂和着色剂。 粘合剂树脂包含四氢呋喃不溶物含量不高于10重量％的氨基甲酸酯改性聚酯树脂。 该调色剂在95℃下的熔体粘度等于或小于1.0×10 4至1​​.0×10 6 Pa。调色剂具有比例A（ 在92℃下的熔体粘度eta 92℃至熔体粘度eta <100％的乙烯/乙烯/乙烯/ 并且在100℃下的熔体粘度eta 100℃的比例B（ηη100 /η110）在100℃至 满足下列表达式（i）的110℃下的熔体粘度等于110℃：<？在线公式描述=“在线式”末端=“铅”→> 0.45 < B / A <0.93（i）<？in-line-formula description =“In-line Formulas”end =“tail”？>

公开(公告)号：US08014690B2

公开(公告)日：2011-09-06

申请号：US12042684

申请日：2008-03-05

申请人： Shoichi Sakata ,  Takahisa Nakaue ,  Toyotsune Inoue ,  Akihiro Watanabe ,  Masashi Fujishima ,  Yukihiro Mori

发明人： Shoichi Sakata ,  Takahisa Nakaue ,  Toyotsune Inoue ,  Akihiro Watanabe ,  Masashi Fujishima ,  Yukihiro Mori

IPC分类号： G03G15/06

CPC分类号： G03G15/065

摘要： A developing unit has a voltage-applicator (80) to apply a developing bias voltage to a developing roller (72). The voltage-applicator (80) applies the developing bias voltage for a first duration to apply an AC voltage having a rectangular waveform, and a second duration to stop applying the AC voltage. The AC voltage has a duty ratio of 50% or more in a direction for causing toner to develop an electrostatic latent image. The number of cycles of the AC voltage in the first duration is two or more, and the AC voltage has a voltage in a direction for pulling the toner back to the developing roller, just before transition to the second duration. The developing unit suppresses occurrence of image unevenness due to a fluctuation in developing gap. Thus, an image forming apparatus equipped with the developing unit forms a high-quality image while suppressing image unevenness.

摘要翻译： 显影单元具有向显影辊（72）施加显影偏压的电压施加器（80）。 电压施加器（80）施加显影偏压第一持续时间以施加具有矩形波形的交流电压和第二持续时间以停止施加AC电压。 AC电压在使调色剂显影静电潜像的方向上具有50％以上的占空比。 在第一持续时间内的交流电压的周期数为两个或更多个，并且在转换到第二持续时间之前，AC电压具有用于将调色剂拖回显影辊的方向上的电压。 显影单元抑制由于显影间隙的波动引起的图像不均匀的发生。 因此，配备有显影单元的图像形成装置在抑制图像不均匀的同时形成高质量图像。

公开(公告)号：US6096467A

公开(公告)日：2000-08-01

申请号：US190014

申请日：1998-11-12

申请人： Yoshitake Shimizu ,  Takahiro Ishihara ,  Hiroshi Shimoyama ,  Toyotsune Inoue ,  Takashi Nishino ,  Kazuya Nagao ,  Kenshi Matsui ,  Takayuki Itakura ,  Norio Horikami

发明人： Yoshitake Shimizu ,  Takahiro Ishihara ,  Hiroshi Shimoyama ,  Toyotsune Inoue ,  Takashi Nishino ,  Kazuya Nagao ,  Kenshi Matsui ,  Takayuki Itakura ,  Norio Horikami

IPC分类号： G03G9/087 ,  G03G9/097

CPC分类号： G03G9/08755 ,  G03G9/08764 ,  G03G9/08795 ,  G03G9/0975 ,  Y10S430/104

摘要： Disclosed are a positive charging color toner comprising a coloring agent and a positive charging electric charge controlling material in a fixing resin, wherein the fixing rein is an urethane-modified polyester resin having an acid value of not more than 5 KOHmg/g, a hydroxyl value of not more than 9 KOHmg/g, a weight-average molecular weight of 8,000 to 120,000 and a number-average molecular weight of 2,000 to 70,000, and the positive charging electric charge controlling material is (a) a quaternary ammonium salt having a melting point of not less than 200.degree. C., or (b) a styrene-acrylate copolymer having a trisubstituted amminio group and a glass transition temperature Tg of not less than 55.degree. C.; and a positive charging one-component non-magnetic color toner comprising a polyester resin having an acid value of not more than 5 KOHmg/g, a hydroxyl value of not more than 9 KOHmg/g, a weight-average molecular weight of 7000 to 20,000 and a number-average molecular weight of 1,000 to 6,000, a polyolefine (releasing agent) having an acid value of not more than 10 KOHmg/g and a weight-average molecular weight of 8,000 to 15,000, a proportion of a polyolefine having a particle diameter of not less than 1.5 .mu.m among polyolefines dispersed in the toner being within 1% in terms of the number, a coloring agent and a positive charging electric charge controlling resin.

摘要翻译： 公开了一种在定影树脂中包含着色剂和正电荷电荷控制材料的正电荷彩色调色剂，其中定影重量为酸值不大于5KOHmg / g的氨基甲酸酯改性聚酯树脂，羟基 值不超过9KOHmg / g，重均分子量为8,000至120,000，数均分子量为2,000至70,000，并且正电荷电荷控制材料为（a）季铵盐，其具有 熔点不低于200℃，或（b）具有三取代氨基的苯乙烯 - 丙烯酸酯共聚物，玻璃化转变温度Tg不低于55℃。 以及含有酸值为5KOHmg / g以下的聚酯树脂，羟值为9KOHmg / g以下的正电荷单组分非磁性彩色调色剂，重均分子量为7000〜 20,000，数均分子量为1,000〜6,000，酸值不大于10KOHmg / g，重均分子量为8,000〜15,000的聚烯烃（脱模剂），具有 分散在调色剂中的聚烯烃中的粒径不小于1.5μm，以数量计，1％以内，着色剂和正电荷电荷控制树脂。