公开(公告)号：US4999272A

公开(公告)日：1991-03-12

申请号：US398502

申请日：1989-08-25

申请人： Hirohide Tanikawa ,  Toshiaki Nakahara ,  Satoshi Yoshida ,  Masatsugu Fujiwara ,  Kiichiro Sakashita

发明人： Hirohide Tanikawa ,  Toshiaki Nakahara ,  Satoshi Yoshida ,  Masatsugu Fujiwara ,  Kiichiro Sakashita

IPC分类号： G03G5/06 ,  G03G9/08 ,  G03G13/09

CPC分类号： G03G13/09 ,  G03G5/06 ,  G03G9/0819 ,  Y10S430/104

摘要： An image forming method, comprising the steps of: providing an electrophotographic photosensitive member comprising an organic photoconductor, and a toner-carrying member carrying thereon a magnetic toner disposed opposite to the photosensitive member with a predetermined clearance in a developing region; the photosensitive member comprising at least two species of charge-generating substances and carrying thereon a digital and an analog electrostatic images; carrying the magnetic toner on the toner-carrying member to the developing region while regulating the magnetic toner so as to provide a thickness smaller than the clearance, the magnetic toner having a specific particle size distribution and a volume-average particle size of 4-10 microns; and developing the electrostatic images with the magnetic toner.

公开(公告)号：US4978597A

公开(公告)日：1990-12-18

申请号：US316802

申请日：1989-02-28

申请人： Toshiaki Nakahara ,  Hirohide Tanikawa

发明人： Toshiaki Nakahara ,  Hirohide Tanikawa

IPC分类号： G03G13/08 ,  G03G9/08 ,  G03G9/083 ,  G03G13/09 ,  G03G15/08 ,  G03G15/09

CPC分类号： G03G13/09 ,  G03G15/0928 ,  G03G9/0819

摘要： An image forming apparatus, comprises an electrostatic image-bearing member for holding an electrostatic charge image and a toner-carrying member having a surface for carrying a magnetic toner thereon, wherein the surface of the toner-carrying member has an unevenness comprising sphere-traced concavities formed by blasting with particles with a definite spherical shape; the magnetic toner comprisaes 17-60% by number of particles of 5 microns or smaller, 1-23% by number of particles of 8-12.7 microns, and 2.0% by volume or less of particles of 16 microns or larger and has a volume-average particle size of 4-11 microns; the electrostatic image-bearing member and the toner-carrying member are disposed with a prescribed gap therebetween at a developing station; means for forming a magnetic toner layer on the toner-carrying member in a thickness which is thinner than the prescribed gap; and means for applying an alternating electric field for development with the magnetic toner at the developing station. The surface of the toner-carrying member comprising the sphere-traced concavities allows the forming of a uniform thin toner layer thereon when combined with the magnetic toner having a specific particle size distribution while the soiling of the surface is prevented for a long period of use.

公开(公告)号：US5202213A

公开(公告)日：1993-04-13

申请号：US823331

申请日：1992-01-21

申请人： Toshiaki Nakahara ,  Hirohide Tanikawa ,  Satoshi Yoshida ,  Masatsugu Fujiwara ,  Kiichiro Sakashita

发明人： Toshiaki Nakahara ,  Hirohide Tanikawa ,  Satoshi Yoshida ,  Masatsugu Fujiwara ,  Kiichiro Sakashita

IPC分类号： G03G9/097

CPC分类号： G03G9/09725

摘要： A developer for developing electrostatic latent images, comprising a mixture of toner and fine powder of silicic acid wherein the mixture has a ratio of B/A of 0.9 or larger provided that the mixture contains A wt. % thereof of the silicic acid fine powder, and contains B wt. % thereof of the silicic acid fine powder after the mixture has been passed through a 200 mesh-sieve.

摘要翻译： 用于显影静电潜像的显影剂，其包含调色剂和硅酸微粉的混合物，其中混合物的B / A比为0.9或更大，条件是混合物含有A wt。 ％的硅酸细粉末，含有Bwt。 该混合物已经通过200目筛后的硅酸细粉末的％。

公开(公告)号：US06232027B1

公开(公告)日：2001-05-15

申请号：US09318776

申请日：1999-05-26

申请人： Satoshi Matsunaga ,  Toshiaki Nakahara ,  Yuichi Mizoh ,  Hirohide Tanikawa ,  Minekazu Endo ,  Tadashi Doujo ,  Nene Shibayama

发明人： Satoshi Matsunaga ,  Toshiaki Nakahara ,  Yuichi Mizoh ,  Hirohide Tanikawa ,  Minekazu Endo ,  Tadashi Doujo ,  Nene Shibayama

IPC分类号： G03G9087

CPC分类号： G03G9/09783 ,  G03G9/08755 ,  G03G9/08782 ,  G03G9/08793 ,  G03G9/09741 ,  G03G9/0975

摘要： A toner having a negative triboelectric chargeability is constituted by at least a binder resin, a colorant and an organic metal compound. The toner is characterized by: (a) the organic metal compound is an organic zirconium compound comprising a coordination or/and a bonding of zirconium and an aromatic compound as a ligand or/and an acid source selected from the group consisting of aromatic diols, aromatic hydroxycarboxylic acids, aromatic monocarboxylic acids, and aromatic polycarboxylic acids, (b) the binder resin is a resin selected from the group consisting of (i) a polyester resin and (ii) a hybrid resin component comprising a polyester unit and a vinyl polymer unit, (c) the binder resin has an acid value of 2-50 mgKOH/g, and (d) the toner contains a TFT (tetrahydrofuran)-soluble content providing a GPC (gel permeation chromatography) chromatogram exhibiting a main peak in a molecular weight range of 3,000-20,000 and including 3-25% of a component having molecular weights of at least 5×105.

摘要翻译： 具有负摩擦带电性的调色剂至少由粘合剂树脂，着色剂和有机金属化合物构成。 调色剂的特征在于：（a）有机金属化合物是一种有机锆化合物，其包含锆和作为配体的芳族化合物的配位或/和键合，和/或选自芳族二醇， （b）粘合剂树脂是选自（i）聚酯树脂和（ii）包含聚酯单元和乙烯基聚合物的杂化树脂组分的树脂中的一种树脂 单元，（c）粘合剂树脂的酸值为2-50mgKOH / g，（d）调色剂含有提供GPC（凝胶渗透色谱）色谱的TFT（四氢呋喃） - 可溶性含量， 分子量范围为3,000-20,000，并且包括3-25％的分子量至少为5×10 5的成分。

公开(公告)号：US5009973A

公开(公告)日：1991-04-23

申请号：US317182

申请日：1989-02-28

申请人： Satoshi Yoshida ,  Toshiaki Nakahara ,  Hirohide Tanikawa ,  Kiichiro Sakashita

发明人： Satoshi Yoshida ,  Toshiaki Nakahara ,  Hirohide Tanikawa ,  Kiichiro Sakashita

IPC分类号： G03G9/09 ,  G03G9/08 ,  G03G9/083 ,  G03G9/087 ,  G03G13/01 ,  G03G13/08 ,  G03G15/08 ,  G03G21/10

CPC分类号： G03G13/013 ,  G03G13/08 ,  G03G9/0819

摘要： An image forming apparatus, comprises: an electrostatic image-bearing member for holding an electrostatic latent image; a developing means for developing the electrostatic latent image to form a toner image on the electrostatic image-bearing member, the developing means including a non-magnetic color toner developing means for development with a developer comprising a non-magnetic color toner and a magnetic toner developing means for development with a magnetic toner, wherein the non-magnetic toner has a volume-average particle size of 4 to 15 microns, the magnetic toner contains 17 to 60% by number of magnetic toner particles having a particle size of 5 microns or smaller, 1-23% by number of magnetic toner particles having a particle size of 8.0-12.7 microns and 2.0% by volume or less of magnetic toner particles having a size of 16 microns or larger, and the magnetic toner has a volume-average particle size of 4-9 micron and a degree of aggregation of 50-95%; a transfer means for transferring the toner image formed on the electrostatic image-bearing member to a transfer-receiving material; and a cleaning means for blade-cleaning the surface of the electrostatic image-bearing member after the transfer.

公开(公告)号：US4985327A

公开(公告)日：1991-01-15

申请号：US526680

申请日：1990-05-22

申请人： Kiichiro Sakashita ,  Hirohide Tanikawa ,  Satoshi Yoshida ,  Toshiaki Nakahara ,  Naoki Matsushige ,  Masatsugu Fujiwara ,  Yasuo Mitsuhashi

发明人： Kiichiro Sakashita ,  Hirohide Tanikawa ,  Satoshi Yoshida ,  Toshiaki Nakahara ,  Naoki Matsushige ,  Masatsugu Fujiwara ,  Yasuo Mitsuhashi

IPC分类号： G03G9/08 ,  G03G13/08

CPC分类号： G03G9/0819 ,  Y10S430/104

摘要： A developer for developing electrostatic images, comprising a non-magnetic toner, the toner containing 17-60% by number of non-magnetic toner particles of 5 microns or smaller, containing 1-30% by number of non-magnetic toner particles of 8-12.7 microns, and containing 2.0% by volume or less of nonmagnetic toner particles of 16 microns or larger; wherein the non-magnetic toner has a volume-average particle size of 4-10 microns, and the non-magnetic toner particles of 5 microns or smaller have a particle size distribution satisfying the following formula:N/V=-0.04N+k,wherein N denotes % by number of non-magnetic toner particles of 5 microns of smaller, V denotes % by volume of non-magnetic toner particles of 5 microns or smaller k denotes a positive number of 4.5-6.5, and N denotes a positive number of 17-60.

公开(公告)号：US4957840A

公开(公告)日：1990-09-18

申请号：US261987

申请日：1988-10-25

申请人： Kiichiro Sakashita ,  Toshiaki Nakahara ,  Hirohide Tanikawa ,  Naoki Matsushige ,  Satoshi Yoshida ,  Masatsugu Fujiwara ,  Yasuo Mitsuhashi

发明人： Kiichiro Sakashita ,  Toshiaki Nakahara ,  Hirohide Tanikawa ,  Naoki Matsushige ,  Satoshi Yoshida ,  Masatsugu Fujiwara ,  Yasuo Mitsuhashi

IPC分类号： G03G9/083 ,  G03G9/08

CPC分类号： G03G9/0819 ,  Y10S430/104

摘要： A developer for developing electrostatic images, comprising a magnetic toner comprising a binder resin and magnetic powder, the developer containing 17-60% by number of magnetic toner particles of 5 microns or smaller, containing 1-23% by number of magnetic toner particles of 8-12.7 microns, and containing 2.0% by volume or less of magnetic toner particles of 16 microns or larger; wherein the magnetic toner has a volume-average particle size of 4-9 microns, and the magnetic toner particles of 5 microns or smaller have a particle size distribution satisfying the following formula:N/V=-0.04N+k,wherein N denotes % by number of magnetic toner particles of 5 micron or smaller, V denotes % by volume of magnetic toner particles of 5 microns or smaller, k denotes a positive number of 4.5-6.5, and N denotes a positive number of 17-60.

公开(公告)号：US4952476A

公开(公告)日：1990-08-28

申请号：US313456

申请日：1989-02-22

申请人： Kiichiro Sakashita ,  Toshiaki Nakahara ,  Hirohide Tanikawa ,  Satoshi Yoshida

发明人： Kiichiro Sakashita ,  Toshiaki Nakahara ,  Hirohide Tanikawa ,  Satoshi Yoshida

IPC分类号： G03G9/08 ,  G03G9/083 ,  G03G9/087

CPC分类号： G03G9/083 ,  G03G9/0819 ,  G03G9/0821 ,  G03G9/08795 ,  Y10S430/104

摘要： A magnetic toner comprising a binder resin, magnetic powder and 0.1-10 wt. % (based on resin component) of a low-molecular weight polyalkylene, the binder resin comprising a vinyl-type polymer having 5 to 80 wt. % of a tetrahydrofuran (THF)-insoluble; the magnetic toner having a melt index of 0.2 to 12 g/10 min. (125.degree. C., 10 kg load); the residual magnetization .sigma..sub.r and the volume-average particle size d of the magnetic toner satisfying the following formula:3.7-0.11d.ltoreq..sigma..sub.r .ltoreq.6.5-0.23d,wherein .sigma..sub.r represents a residual magnetization (emu/g) under an external magnetic field of 1 KOe and d represents a volume-average particle size of 3 to 16 microns.

公开(公告)号：US06191805B1

公开(公告)日：2001-02-20

申请号：US09239552

申请日：1999-01-29

申请人： Yukihiko Shimizu ,  Masao Saito ,  Kinya Ueda ,  Toshiaki Nakahara ,  Shigetaka Nakamura ,  Hiromichi Morishima ,  Toshihiro Yamasaki

发明人： Yukihiko Shimizu ,  Masao Saito ,  Kinya Ueda ,  Toshiaki Nakahara ,  Shigetaka Nakamura ,  Hiromichi Morishima ,  Toshihiro Yamasaki

IPC分类号： B41J1514

CPC分类号： B41J2/4476

摘要： A printer head capable of increasing intensity of dot-like light irradiated onto a record medium without requiring to increase a drive voltage or the number of printer heads arranged. The optical printer head includes a luminous element including two luminous dot arrays arranged in parallel to each other at a predetermined interval in a sub-scanning direction. The luminous dot arrays each are constituted of a plurality of luminous dots which have a dimension in the sub-scanning direction increased by a predetermined magnification as compared with that in a main scanning direction and are spaced from each other at identical intervals in the main scanning direction. The luminous dots of the two luminous dot arrays are arranged in an offset manner while being deviated from each other in the main scanning direction by a distance equal to the dimension thereof in the main scanning direction. Also, a reduction optical system is arranged for carrying out irradiation of light emitted from the luminous dots while reducing a dimension of the light in the sub-scanning direction by a reciprocal of the predetermined magnification.

摘要翻译： 一种能够增加照射到记录介质上的点状光的强度的打印头，而不需要增加驱动电压或布置的打印机头的数量。 光学打印机头包括在副扫描方向上以预定间隔彼此平行地布置的两个发光点阵列的发光元件。 发光点阵列各自由多个发光点构成，该多个发光点在副扫描方向上的尺寸与主扫描方向相比增加了预定的倍率，并且在主扫描中以相同的间隔彼此间隔开 方向。 两个发光点阵列的发光点以偏移方式布置，同时在主扫描方向上彼此偏离与主扫描方向上的尺寸相等的距离。 此外，还原光学系统被布置成用于在通过预定倍率的倒数减小副扫描方向上的光的尺寸的同时，进行从发光点发射的光的照射。

公开(公告)号：US4888264A

公开(公告)日：1989-12-19

申请号：US205540

申请日：1988-06-06

申请人： Toru Matsumoto ,  Toshiyuki Koshio ,  Yasuhide Goseki ,  Hisayuki Ushiyama ,  Masuo Yamazaki ,  Ichiro Ohsaki ,  Toshiaki Nakahara ,  Junichi Kurimoto ,  Katsutoshi Wakamiya

发明人： Toru Matsumoto ,  Toshiyuki Koshio ,  Yasuhide Goseki ,  Hisayuki Ushiyama ,  Masuo Yamazaki ,  Ichiro Ohsaki ,  Toshiaki Nakahara ,  Junichi Kurimoto ,  Katsutoshi Wakamiya

IPC分类号： G03G9/087 ,  G03G9/093

CPC分类号： G03G9/08704 ,  G03G9/08731 ,  G03G9/09321 ,  G03G9/09364 ,  G03G9/09378 ,  G03G9/09392

摘要： A mixture of a colorant, and a binder compound having an aliphatic hydrocarbon long chain and having a relatively low melt viscosity, is kneaded in a molten state in the presence of solid media such as balls or beads to form a uniform mixture in which the colorant particles or aggregates have been disintegrated to a size of 5 .mu. or below. Solid particles which may be used as a toner are formed from the uniform mixture and may be encapsulated, as desired, to provide a capsule toner.

摘要翻译： 在固体介质如球或珠的存在下，将着色剂和具有脂族烃长链并具有较低熔体粘度的粘合剂混合物在熔融状态下捏合以形成均匀的混合物，其中着色剂 颗粒或聚集体已经分解成5微米或更小的尺寸。 可以用作调色剂的固体颗粒由均匀的混合物形成，并且可根据需要被包封以提供胶囊调色剂。