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公开(公告)号：US5376489A
公开(公告)日：1994-12-27
申请号：US946154
申请日：1992-09-17
申请人： Naruo Yabe , Tetsuya Nakano , Masahide Inoue , Teruaki Teratani , Koichi Tsuyama , Yoshitake Shimizu , Seijiro Ishimaru
发明人： Naruo Yabe , Tetsuya Nakano , Masahide Inoue , Teruaki Teratani , Koichi Tsuyama , Yoshitake Shimizu , Seijiro Ishimaru
CPC分类号： G03G9/1132 , G03G9/0823
摘要： The developer in accordance with the present invention includes toner, and a carrier having a core material the surface of which is coated with a coating layer made of a polymer, the coating layer having a resistance value sufficient to minimize the counter electric charge remaining in the coating layer, and the toner having any of characteristic values required for preventing a counter electric charge remaining in the coating layer from being increased. The use of the developer of the present invention not only prevents the occurrence of so-called carrier scattering, to thereby prevent blanking, but also produces an image of high quality having a high initial image density.
摘要翻译： 根据本发明的显影剂包括调色剂和具有芯材料的载体，其表面涂覆有由聚合物制成的涂层，所述涂层具有足以使剩余的反电荷最小化的电阻值 涂层，并且具有防止在涂层中剩余的相对电荷所需的任何特征值的调色剂增加。 使用本发明的显影剂不仅防止所谓的载体散射的发生，从而防止消隐，而且还产生具有高初始图像浓度的高质量的图像。
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公开(公告)号：US5223367A
公开(公告)日：1993-06-29
申请号：US735273
申请日：1991-07-24
申请人： Seijiro Ishimaru , Tetsuya Nakano , Masahide Inoue , Koichi Tsuyama , Teruaki Teratani , Naruo Yabe , Yoshitake Shimizu
发明人： Seijiro Ishimaru , Tetsuya Nakano , Masahide Inoue , Koichi Tsuyama , Teruaki Teratani , Naruo Yabe , Yoshitake Shimizu
IPC分类号： G03G9/08
CPC分类号： G03G9/08
摘要： A start developer is described which includes a toner and a carrier, present in a predetermined ratio. The carrier spent amount is adjusted so that it is not less than 0.010% in terms of the amount of carbon, as measured with a carbon analyzer. With this start developer, good quality images may be formed throughout the copying operation, from the initial image forming stage to the repeated image forming stage and through the stabilized image forming stage.
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公开(公告)号：US5240804A
公开(公告)日：1993-08-31
申请号：US736436
申请日：1991-07-26
申请人： Tetsuya Nakano , Naruo Yabe , Masahide Inoue , Teruaki Teratani , Koichi Tsuyama , Seijiro Ishimaru , Yoshitake Shimizu
发明人： Tetsuya Nakano , Naruo Yabe , Masahide Inoue , Teruaki Teratani , Koichi Tsuyama , Seijiro Ishimaru , Yoshitake Shimizu
CPC分类号： G03G9/09 , G03G9/0819 , G03G9/08711 , G03G9/091 , G03G9/1133
摘要： The present invention provides an electrophotographic developer comprising (i) a toner containing a fixing resin in which the content of an acrylic component is limited to a predetermined range, or a toner of which surface dye density is limited to a predetermined range, and (ii) a carrier coated with a coating resin containing, as an acrylic component, dodecyl methacrylate or 2-hydroxyethyl acrylate.In the electrophotographic developer of the present invention, the electric charging characteristics are always stable.
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公开(公告)号：US5232807A
公开(公告)日：1993-08-03
申请号：US735270
申请日：1991-07-24
申请人： Tetsuya Nakano , Naruo Yabe , Masahide Inoue , Teruaki Teratani , Koichi Tsuyama , Yoshitake Shimizu , Seijiro Ishimaru
发明人： Tetsuya Nakano , Naruo Yabe , Masahide Inoue , Teruaki Teratani , Koichi Tsuyama , Yoshitake Shimizu , Seijiro Ishimaru
CPC分类号： G03G9/08711 , G03G9/1133 , Y10S430/105
摘要： The present invention provides an electrophotographic developer comprising (i) a toner containing, as a fixing resin, a styrene-acrylic copolymer presenting a gel permeation chromatogram showing a molecular-weight distribution in which the detection-starting molecular weight and the detection-ending molecular weight are respectively located in specific ranges, and (ii) a carrier coated with a coating resin which is a styrene-acrylic copolymer containing at least 2-hydroxyethyl acrylate.Even though repeatedly agitated in the developing device, the electrophotographic developer of the present invention is not deteriorated and assures good durability and long life-time.
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公开(公告)号：US5281505A
公开(公告)日：1994-01-25
申请号：US720419
申请日：1991-06-25
申请人： Masahide Inoue , Tetsuya Nakano , Naruo Yabe , Teruaki Teratani , Koichi Tsuyama , Yoshitake Shimizu , Seijirou Ishimaru
发明人： Masahide Inoue , Tetsuya Nakano , Naruo Yabe , Teruaki Teratani , Koichi Tsuyama , Yoshitake Shimizu , Seijirou Ishimaru
CPC分类号： G03G9/0821 , G03G9/0825 , G03G9/09
摘要： A toner composition comprising a binder resin having dispersed therein additives including a colorant and a charge control agent, wherein said additives are present as agglomerates having an average sectional area of from 1.4 to 1.7 .mu.m.sup.2 in a section of toner particles, the total sectional area of the agglomerates in the section of toner particles ranging from 1.5 to 1.8%, or wherein said colorant and charge control agent are present as agglomerates having an average sectional area of from 1.4 to 1.7 .mu.m.sup.2 in a section of toner particles, and said composition has such rheological characteristics that a dissipation factor (tan .delta.) is from 0.95 to 1.25 when a storage elastic modulus (G') is 10.sup.4 dyne/cm.sup.2.
摘要翻译： 一种调色剂组合物，其包含分散有添加剂的粘合剂树脂，所述添加剂包括着色剂和电荷控制剂，其中所述添加剂以调色剂颗粒的截面中平均截面积为1.4-1.7（my） 在调色剂颗粒部分中的附聚物的截面积为1.5至1.8％，或其中所述着色剂和电荷控制剂作为附聚物以在调色剂颗粒的一部分中的平均截面积为1.4至1.7（my） 并且所述组合物具有这样的流变特性，当储能弹性模量（G'）为104达因/ cm 2时，损耗因子（tan（delta））为0.95至1.25。
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公开(公告)号：US5104766A
公开(公告)日：1992-04-14
申请号：US544637
申请日：1990-06-27
申请人： Tetsuya Nakano , Naruo Yabe , Masahide Inoue , Koichi Tsuyama , Yoshitake Shimizu , Mitsushi Kuroki
发明人： Tetsuya Nakano , Naruo Yabe , Masahide Inoue , Koichi Tsuyama , Yoshitake Shimizu , Mitsushi Kuroki
CPC分类号： G03G9/0819
摘要： Disclosed are a toner for developing a statically charged image and a process for the preparation thereof. If a toner for developing a statically charged image, comprising a binder resin and, dispersed therein, a colorant and a charge-controlling dye, is prepared so that it has a particle size distribution satisfying the requirement represented by the following formula:N
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7.发明授权Toner for developing statically charged images and process for preparation thereof 失效用于开发静态充电图像的调色剂及其制备方法
公开(公告)号：US5110704A
公开(公告)日：1992-05-05
申请号：US544632
申请日：1990-06-27
申请人： Masahide Inoue , Tetsuya Nakano , Naruo Yabe , Koichi Tsuyama , Yoshitake Shimizu , Mitsushi Kuroki
发明人： Masahide Inoue , Tetsuya Nakano , Naruo Yabe , Koichi Tsuyama , Yoshitake Shimizu , Mitsushi Kuroki
CPC分类号： G03G9/0821 , G03G9/08711
摘要： Disclosed is a toner for developing a statically charged image, which comprises a fixing resin and, dispersed therein, a colorant and a charge-controlling dye. This toner is characterized in that the tangent (tan .delta.) of the loss angle is in the range of from 0.95 to 1.25 when the storage modulus of elasticity (G') is 10.sup.4 dyne/cm.sup.2. The toner having such rheological characteristics has an excellent fixing property, a high offset resistance, a capacity of forming an image having a high quality and a good durability.
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公开(公告)号：US5264311A
公开(公告)日：1993-11-23
申请号：US570304
申请日：1990-08-20
申请人： Tetsuya Nakano , Naruo Yabe , Masahide Inoue , Koichi Tsuyama , Yoshitake Shimizu , Mitsushi Kuroki
发明人： Tetsuya Nakano , Naruo Yabe , Masahide Inoue , Koichi Tsuyama , Yoshitake Shimizu , Mitsushi Kuroki
CPC分类号： G03G9/08711 , G03G9/08728 , Y10S430/105
摘要： In an electrophotographic toner, by using as the binder resin a styrene/acrylic resin in which in the gel permeation chromatogram, a high molecular weight peak value appears in a molecular weight region higher than 1.times.10.sup.5, a low molecular weight peak value appears in a molecular weight region of from 2.times.10.sup.4 to 500, a minimum value appears halfways between the two peaks and the ratio (V/P) of the area of the valley to the peak area is lower than 0.3, the internal cohesive force of the binder resin for the toner can be prominently improved while maintaining the low-temperature fixing property and offset resistance at high levels, and pulverization of the toner and formation of the spent toner can be prevented during the developing operation and the durability of the toner can be improved.
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公开(公告)号：US5275904A
公开(公告)日：1994-01-04
申请号：US8338
申请日：1993-01-25
CPC分类号： G03G15/0853 , G03G15/0849
摘要： The present invention provides a start developer wherein an output voltage of a sensor in the start developer having a particular toner density is not less than 0.9 times an output voltage of the sensor in a developer having the same toner density in a time period during which image characteristics are stabilized after repeating image formation by an image forming apparatus and is less than a threshold value at which the supply of toner is started and a method of controlling the toner density using the start developer. According to the present invention, good images can be always formed irrespective of the variation in characteristics between sensors in image forming apparatuses and from the early stage of image formation to the stable time period.
摘要翻译： 本发明提供了一种起动显影剂，其中具有特定调色剂密度的起始显影剂中的传感器的输出电压不小于在图像的时间段内具有相同调色剂密度的显影剂中的传感器的输出电压的0.9倍 在通过图像形成装置重复图像形成之后，特性被稳定，并且小于开始调色剂供应的阈值和使用起始显影剂控制调色剂浓度的方法。 根据本发明，可以始终形成良好的图像，而不管图像形成装置中的传感器之间的特性以及从图像形成的早期阶段到稳定的时间段的变化。
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公开(公告)号：US5213935A
公开(公告)日：1993-05-25
申请号：US698785
申请日：1991-05-13
IPC分类号： G03G15/08
CPC分类号： G03G15/0853 , G03G15/0849
摘要： The present invention provides a start developer wherein an output voltage of a sensor in the start developer having a particular toner density is not less than 0.9 times an output voltage of the sensor in a developer having the same toner density in a time period during which image characteristics are stabilized after repeating image formation by an image forming apparatus and is less than a threshold value at which the supply of toner is started and a method of controlling the toner density using the start developer. According to the present invention, good images can be always formed irrespective of the variation in characteristics between sensors in image forming apparatuses and from the early stage of image formation to the stable time period.
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