公开(公告)号：US3681243A

公开(公告)日：1972-08-01

申请号：US3681243D

申请日：1969-05-22

申请人： RICOH KK

发明人： OKUNO ZENJIRO ,  MIZUNO AKINORI

IPC分类号： G03G9/135 ,  G03G9/04

CPC分类号： G03G9/135 ,  G03G9/1355

摘要： THE INVENTION RELATES TO A LIQUID DEVELOPER FOR ELECTROPHOTOGRAPHY, COMPRISING A CARRIER LIQUID AND A TONER DISPERSED IN SAID CARRIER LIQUID, WHEREIN SAID DEVELOPER CONTAINS AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF METAL-DIALKYL-DITHIOPHOSPHATES, SODIUMALKYL-PHOSPHATES, ALKY-PHOSPHATES, ALKALI METAL-ALKYLSULFATES, ALCOHOLS, MONOCARBOXYLIC ACIDS, PHTHALIC ACID, ALKYL PHTHALATES, AMMONIA, AMINES, ALDEHYDES, DEKALIN, AZOBENZENE, CAMPHOR, CITRAL AND SYRENE.

公开(公告)号：US3623986A

公开(公告)日：1971-11-30

申请号：US3623986D

申请日：1968-07-29

申请人： RICOH KK

发明人： MACHIDA HAZIME ,  OKUNO ZENJIRO

IPC分类号： C08F292/00 ,  G03G9/13 ,  G03G9/04

CPC分类号： C08F292/00 ,  G03G9/133 ,  Y10S430/105

摘要： A liquid developer for use in electrophotography and being of the type in which a toner is dispersed in a carrier liquid, said carrier liquid consisting of an organic solvent having a high electric resistance of at least 1010 Omega cm. and a low dielectric constant of a maximum of 3, said toner being selected from the group of toners of the following types (a),(b),(c) and (d): A. Toners of the type in which pigment particles are coated, by the kneading technique, with a homopolymer of a monomer selected from the group consisting of polymeric monomers having an epoxy radical (-0-) and polymeric monomers having a carbinol radical, B. TONERS OF THE TYPE THAT SAID HOMOPOLYMER IS GRAFTCOPOLYMERIZED TO SAID PIGMENT PARTICLES, C. TONERS OF THE TYPE IN WHICH THE PIGMENT PARTICLES ARE COATED, BY THE KNEADING TECHNIQUE, WITH A COPOLYMER IN WHICH IS CONTAINED, BY COPOLYMERIZATION, A MONOMER SELECTED FROM THE AFORESAID GROUP OF POLYMERIC MONOMERS, AND D. TONERS OF THE TYPE IN WHICH SAID COPOLYMER IS GRAFTCOPOLYMERIZED TO THE PIGMENT PARTICLES.

公开(公告)号：US3640751A

公开(公告)日：1972-02-08

申请号：US3640751D

申请日：1968-10-31

申请人： RICOH KK

发明人： KASUYA KAZUHIKO ,  OHTA WASABURO ,  OKUNO ZENJIRO

IPC分类号： G03G9/12 ,  G03G9/125 ,  G03G9/13 ,  G03G13/10 ,  G03G9/04

CPC分类号： G03G9/132 ,  G03G9/12 ,  G03G9/125 ,  G03G9/131 ,  G03G13/10 ,  Y10T428/2991 ,  Y10T428/31786

摘要： An electrophotographic liquid-developing method comprising controlling the polarity of the toner by varying the mixing proportion of the dispersion media and/or the temperature of the developer solution. An electrostatic charge-substrate having an electrostatically charged latent image is immersed in the developer solution to convert such latent image into a visible image. Said developer solution comprises a toner consisting of pigment particles and at least one resin selected from the group consisting of alkyd resin, phenol resin and vinyl resin, and a carrier liquid in which said toner is dispersed. The carrier liquid comprises a mixture of two dispersion media having different affinities to said resin. Dispersion media having a larger affinity to the resin include halogenated hydrocarbons, aromatic hydrocarbons and petroleum hydrocarbons containing aromatic ingredients. Dispersion media having a smaller affinity to the resin include isoparaffinic and paraffinic hydrocarbons.

摘要翻译： 一种电子照相液体显影方法，包括通过改变分散介质的混合比例和/或显影剂溶液的温度来控制调色剂的极性。 将具有静电电荷的潜像的静电电荷基板浸入显影剂溶液中以将这种潜像转换成可见图像。 所述显影剂溶液包含由颜料颗粒和选自醇酸树脂，酚醛树脂和乙烯基树脂中的至少一种树脂组成的调色剂和分散有所述调色剂的载体液体。 载液包含与所述树脂具有不同亲合力的两种分散介质的混合物。 对树脂具有较大亲和力的分散介质包括卤代烃，芳族烃和含有芳族成分的石油烃。 对树脂具有较小亲和力的分散介质包括异链烷烃和链烷烃。

公开(公告)号：US3629117A

公开(公告)日：1971-12-21

申请号：US3629117D

申请日：1966-10-14

申请人： RICOH KK

发明人： OKUNO ZENJIRO

IPC分类号： G03G9/12 ,  G03G9/125 ,  G03G9/13 ,  G03G9/00

CPC分类号： G03G9/125 ,  G03G9/122 ,  G03G9/13 ,  G03G9/133 ,  Y10S430/105 ,  Y10S524/901

摘要： THE INVENTION RELATES TO A DEVELOPER FOR ELECTROPHOTOGRAPHY OF THE TYPE COMPRISING A CARRIER LIQUID AND PIGMENT PARTICLES DISPERSED IN SAID CARRIER, THE INVENTION RESIDING IN THE CHEMICAL GRAFTING OF AN ORGANIC MATERIAL HAVING UNSATURATED DOUBLE BONDS TO THE PIGMENT TO CONTROL THE ELECTROKINETIC POTENTIAL OF THE SURFACE OF THE PIGMENT.

公开(公告)号：US3585140A

公开(公告)日：1971-06-15

申请号：US3585140D

申请日：1968-06-26

申请人： RICOH KK

发明人： MACHIDA HAZIME ,  OKUNO ZENJIRO

IPC分类号： G03G9/12 ,  G03G9/125 ,  G03G9/13 ,  G03G9/135 ,  G03G9/04

CPC分类号： G03G9/133 ,  G03G9/122 ,  G03G9/125 ,  G03G9/131 ,  G03G9/1355 ,  Y10S430/105

摘要： A LIQUID DEVELOPER FOR USE IN ELECTROPHOTOGRAPHY, COMPRISING A TONER DISPERSED IN A CARRIER LIQUID, SAID CARRIER LIQUID CONSISTING OF A HYDROCARBON HAVING A HIGH ELECTRIC RESISTANCE AND A LOW DIELECTRIC CONSTANT AND A SURFACE ACTIVE AGENT DISSOLVED IN SAID HYDROCARBON, SAID TONER BEING PREPARED BY HAVING A VINYL COPOLYMER GRAFT-BONDED ONTO THE PARTICLES OF A PIGMENT OR BY COATING THE PARTICLES OF THE PIGMENT WITH SAID VINYL COPOLYMER, SAID VINYL COPOLYMER CONSISTING OF A LEAST THREE VINYL MONOMRS OF THREE DIFFERENT TYPES SELECTED FROM THE FOLLOWNING THREE GROUPS, RESPECTIVELY, ONE (A) OF WHICH CONSISTING OF VINYL MONOMERS CONTAINING FUNCTIONAL RADICALS HAVING A HIGHLY INCREASED CHEMICAL AFFINITY TO SAID CARRIER LIQUID, THE SECOND GROUP (B) CONSISTING OF VINYL MONOMERS CONTAINING FUNCTIONAL RADICALS WHICH ARE CAPABLE OF CONTROLLING THE POLARITY OF THE PIGMENT EMPLLYED, AND THE LAST GROUP (C) CONSISTING OF VINYL MONOMERS CONTAINING FUNCTIONAL RADICALS WHICH ARE CAPABLE OF PRODUCING TIGHT ADHESION OR FIXING OF THE TONER TO THE LIGHT-SENSITIVE LAYER OF AN ELECTROPHOTOGRAPHIC COPYING MATERIAL.

公开(公告)号：US3503881A

公开(公告)日：1970-03-31

申请号：US3503881D

申请日：1967-06-20

申请人： RICOH KK

发明人： SHINOHARA ISAO ,  TSUCHIDA EISHUN ,  GOTO TOSHINAO ,  OKUNO ZENJIRO ,  TASHIRO ISAO ,  KAWAMURA EIICHI ,  NAKAMURA MAKOTO ,  MUTO KENKICHI

IPC分类号： G03G9/087 ,  G03G9/06

CPC分类号： G03G9/08786 ,  Y10S430/105

公开(公告)号：US3870644A

公开(公告)日：1975-03-11

申请号：US30799372

申请日：1972-11-20

申请人： RICOH KK

发明人： MACHIDA HAZIME ,  OKUNO ZENJIRO

IPC分类号： G03G9/12 ,  G03G9/13 ,  G03G9/135 ,  G03G9/00

CPC分类号： G03G9/122 ,  G03G9/131 ,  G03G9/135 ,  Y10S430/101

摘要： A set of liquid developers for plural-color electrophotography, comprising carrier liquids and toners of four colors separately dispersed in said carrier liquid for each color, said toners being selected from the group consisting of: A. A TONER CONSISTING SUBSTANTIALLY OF COLORING AGENTS FOR FOUR COLORS AND FINELY DIVIDED PARTICLES OF COLORLESS, TRANSPARENT ORGANIC PHOTOCONDUCTIVE SUBSTANCE COLORED SEVERALLY BY SAID FOUR COLORING AGENTS; B. A TONER CONSISTING SUBSTANTIALLY OF COLORING AGENTS FOR FOUR COLORS, FINELY DIVIDED PARTICLES OF COLORLESS, TRANSPARENT ORGANIC PHOTOCONDUCTIVE SUBSTANCE COLORED SEVERALLY BY SAID FOUR COLORING AGENTS, AND ONE COATING AGENT COATED ON THE SURFACE OF SAID COLORED PHOTOCONDUCTIVE SUBSTANCE AND SELECTED FROM THE GROUP CONSISTING OF HITHERTO KNOWN COATING RESINS FOR TONER AND SUCH VINYL POLYMERS AS ARE INSOLUBLE IN SAID CARRIER LIQUID; AND C. A TONER CONSISTING SUBSTANTIALLY OF COLORING AGENTS FOR FOUR COLORS, FINELY DIVIDED PARTICLES OF COLORLESS, TRANSPARENT ORGANIC PHOTOCONDUCTIVE SUBSTANCE COLORED SEVERALLY BY SAID FOUR COLORING AGENTS, AND A POLYMER COATED ON THE SURFACE OF SAID COLORED PHOTOCONDUCTIVE SUBSTANCE AND HAVING AN AFFINITY WITH SAID CARRIER LIQUID.

摘要翻译： 一种用于多色电子照相术的液体显影剂，包括载体液体和四种颜色的调色剂，其分别分散在每种颜色的所述载体液体中，所述调色剂选自：

公开(公告)号：US3640863A

公开(公告)日：1972-02-08

申请号：US3640863D

申请日：1969-05-28

申请人： RICOH KK

发明人： OKUNO ZENJIRO ,  MIZUNO AKINORI ,  KONDOH IKUYO

IPC分类号： G03G9/08 ,  G03G9/13 ,  G03G9/04

CPC分类号： G03G9/131 ,  G03G9/08 ,  G03G9/132

摘要： A liquid developer for use in developing an electrostatic latent image formed on an electrostatic recording material or an electrophotographic copying material which is prepared by dispersing, in a suitable carrier liquid, a toner consisting substantially of pigment particles whose surfaces are coated with a coating agent selected from the group consisting of cyclized rubber, a resin containing cyclized rubber, and a resin combining a resin having a high solubility for said carrier liquid and a resin having a low solubility for said carrier liquid.

摘要翻译： 用于显影形成在静电记录材料上的静电潜像的液体显影剂或电子照相复印材料，其通过在合适的载体液体中分散基本上由表面涂覆有选择的涂层剂的颜料颗粒组成的调色剂 由环化橡胶，含有环化橡胶的树脂和将所述载体液体具有高溶解度的树脂和对所述载体液体具有低溶解度的树脂组合的树脂组成。

公开(公告)号：US3639243A

公开(公告)日：1972-02-01

申请号：US3639243D

申请日：1967-11-13

申请人： RICOH KK

发明人： OKUNO ZENJIRO ,  MACHIDA HAZIME

IPC分类号： C08F2/44 ,  G03G9/13 ,  G03G9/04

CPC分类号： G03G9/133 ,  C08F2/44

摘要： A liquid developer for electrophotography, which is prepared by dispersing, in a suitable carrier liquid, either independently or together with a surface active agent, a toner which is obtained by the so-called graft-copolymerization technique by a direct chemical bonding between a pigment and unsaturated compounds having a dispersing effect and a large electric charge polarity controlling ability, or more specifically, unsaturated compounds capable of chemically bonding to pigment, resulting in a large and distinct electric charge polarity of said toner in the carrier liquid and also capable of facilitating the dispersion of said particles in said carrier liquid which consists of a paraffinic hydrocarbon (including both isoparaffinic and paraffinic hydrocarbons) having a relatively high-electric resistance and a low-dielectric constant.

摘要翻译： 一种用于电子照相术的液体显影剂，其通过在合适的载体液体中独立地或与表面活性剂一起分散，通过所谓的接枝共聚技术通过颜料之间的直接化学键合获得的调色剂 以及具有分散效果和大电荷极性控制能力的不饱和化合物，或更具体地，能够与颜料化学键合的不饱和化合物，导致载体液体中所述调色剂的电荷极性大，并且还能够促进 所述颗粒在由具有相对高电阻和低介电常数的链烷烃（包括异链烷烃和链烷烃）组成的载体液体中的分散。

公开(公告)号：US3625897A

公开(公告)日：1971-12-07

申请号：US3625897D

申请日：1969-06-11

申请人： RICOH KK

发明人： MACHIDA HAZIME ,  OKUNO ZENJIRO

IPC分类号： G03G9/12 ,  G03G9/04

CPC分类号： G03G9/12 ,  Y10S430/105

摘要： A liquid developing agent for electrophotography comprising a mixed solution consisting of an insulating carrier liquid containing an organic substance having carboxyl group and a colored solution prepared by solving or dispersing a dye and an amine in a polar solvent which is not miscible with the aforementioned carrier liquid.