公开(公告)号：US5932387A

公开(公告)日：1999-08-03

申请号：US907002

申请日：1997-08-06

Applicant: Yasuo Yamamoto ,  Takeshi Agata ,  Masato Mikami ,  Kazuhiko Yanagida ,  Suk Kim

Inventor： Yasuo Yamamoto ,  Takeshi Agata ,  Masato Mikami ,  Kazuhiko Yanagida ,  Suk Kim

IPC: G03G9/113

CPC classification number: G03G9/1131 ,  G03G9/1133 ,  Y10T428/2998

Abstract: The present invention provides a charged member which has no reduction in the amount of electrostatic charge at high temperature and high humidity and no extreme increase in the amount of electrostatic charge at low temperature and low humidity, improves the adhesion force between a charged member and a coating layer, prevents deterioration of developer through peeling of the coating layer. It provides excellent durability without deterioration of toner through adhering of a toner to the carrier. More particularly, a carrier for electrophotography and a sleeve for electrostatic development which use as a coating material a high-molecular compound containing as an essential component the first monomer represented by the following general formula (1) and/or (2), the second monomer represented by the following general formula (3) and/or (4) and a coupling agent containing a vinyl group are provided.

Abstract translation: 本发明提供了一种充电部件，其在高温高湿下不会减少静电电荷量，并且在低温和低湿度下不会极大地增加静电电荷，从而提高带电部件与 涂层，通过剥离涂层防止显影剂的劣化。 它通过将调色剂粘附到载体上而提供优异的耐久性而不会使调色剂劣化。 更具体地说，一种用于电子照相的载体和用于静电显影的套筒，其用作涂覆材料，含有由以下通式（1）和/或（2）表示的第一单体作为主要成分的高分子化合物，第二种 提供由以下通式（3）和/或（4）表示的单体和含有乙烯基的偶联剂。

公开(公告)号：US5795691A

公开(公告)日：1998-08-18

申请号：US647864

申请日：1996-05-14

Applicant: Hiroshi Yamazaki ,  Kishio Tamura ,  Mayumi Hayashi

Inventor： Hiroshi Yamazaki ,  Kishio Tamura ,  Mayumi Hayashi

IPC: G03G9/08 ,  G03G9/107 ,  G03G9/113 ,  G03G9/083

CPC classification number: G03G9/107 ,  G03G9/1131 ,  G03G9/1132 ,  G03G9/1133

Abstract: Disclosed is a developer of electrostatic latent image containing a carrier and a toner which contains a colorant and a binder resin, wherein the carrier comprises a magnetic substance particle and a resin coated on the magnetic substance particle, and said resin for coating is a polyolefin having a weight average molecular weight (Mw) of 20.times.10.sup.4 to 100.times.10.sup.4, a number average molecular weight (Mn) of 0.5.times.10.sup.4 to 10.times.10.sup.4 and an Mw/Mn of 5 to 100; and further the toner may contain a polyolefin having a number average molecular weight of 1500 to 9000 as a releasing agent.

Abstract translation: 公开了含有载体和含有着色剂和粘合剂树脂的调色剂的静电潜像显影剂，其中载体包括磁性物质颗粒和涂覆在磁性物质颗粒上的树脂，所述涂料用树脂是具有 重均分子量（Mw）为20×10 4至1​​00×10 4，数均分子量（Mn）为0.5×10 4至1​​0×10 4，Mw / Mn为5至100; 此外，调色剂可以含有作为脱模剂的数均分子量为1500〜9000的聚烯烃。

公开(公告)号：US5705221A

公开(公告)日：1998-01-06

申请号：US629818

申请日：1996-04-10

Applicant: William Edward Yoerger

Inventor： William Edward Yoerger

IPC: G03G9/113 ,  B05D7/00

CPC classification number: G03G9/1134 ,  G03G9/1133 ,  G03G9/1139

Abstract: A method of modifying the triboelectric charging propensity electrostatographic developer carrier particles, comprising the steps of: (A) providing a carrier particles that is uncoated or polymer coated; (B) mixing the carrier particles with either (i) an aqueous basic solution or (ii) an aqueous solution containing from 0.1 to 5.0 weight percent of a soluble acidic metal salt, based on the weight of the carrier particles to form a mixture; and (C) contacting the mixture with the solution, (i) or (ii), not used in step (B) thereby causing a precipitate of an insoluble salt to deposit on the carrier particles wherein the insoluble salt is (a) strontium carbonate; (b) insoluble metal hydroxides; (c) insoluble metal hydrated oxides; or (d) a mixture of two or more of (a), (b) and (c); provided that when a soluble strontium metal acid salt is used in step (B) (ii) and the carrier coating is other than a polyfluorocarbon, a reagent that provides a source of carbonate ions is also used in step (B).

Abstract translation: 一种修饰摩擦带电倾向性静电显影剂载体颗粒的方法，包括以下步骤：（A）提供未涂覆或聚合物涂覆的载体颗粒; （B）基于载体颗粒的重量，将载体颗粒与（i）碱性水溶液或（ii）含有0.1至5.0重量％的可溶性酸性金属盐的水溶液混合以形成混合物; 和（C）使混合物与步骤（B）中未使用的溶液（i）或（ii）接触，由此使不溶性盐沉淀物沉积在载体颗粒上，其中不溶性盐是（a）碳酸锶 ; （b）不溶性金属氢氧化物; （c）不溶性金属水合氧化物; 或（d）（a），（b）和（c）中的两种或多种的混合物; 条件是当在步骤（B）（ii）中使用可溶性锶金属酸盐并且载体涂层不是多氟碳化合物时，在步骤（B）中也使用提供碳酸根离子源的试剂。

公开(公告)号：US5332637A

公开(公告)日：1994-07-26

申请号：US114890

申请日：1993-08-31

Applicant: John C. Wilson ,  Steven M. Bonser ,  Hans W. Osterhoudt

Inventor： John C. Wilson ,  Steven M. Bonser ,  Hans W. Osterhoudt

IPC: G03G9/087 ,  G03G9/097 ,  G03G9/107 ,  G03G9/113

CPC classification number: G03G9/1133 ,  G03G9/08711 ,  G03G9/09758 ,  G03G9/1075

Abstract: N-hydroxyphthalimide as a charge-control agent for fusible, dry electrostatographic toners.

Abstract translation: N-羟基邻苯二甲酰亚胺作为易熔干电解调色剂的电荷控制剂。

公开(公告)号：US5232807A

公开(公告)日：1993-08-03

申请号：US735270

申请日：1991-07-24

Applicant: Tetsuya Nakano ,  Naruo Yabe ,  Masahide Inoue ,  Teruaki Teratani ,  Koichi Tsuyama ,  Yoshitake Shimizu ,  Seijiro Ishimaru

Inventor： Tetsuya Nakano ,  Naruo Yabe ,  Masahide Inoue ,  Teruaki Teratani ,  Koichi Tsuyama ,  Yoshitake Shimizu ,  Seijiro Ishimaru

IPC: G03G9/087 ,  G03G9/113

CPC classification number: G03G9/08711 ,  G03G9/1133 ,  Y10S430/105

Abstract: 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.

公开(公告)号：US5212034A

公开(公告)日：1993-05-18

申请号：US711143

申请日：1991-06-06

Applicant: Koichi Tsuyama ,  Hiroshi Harada

Inventor： Koichi Tsuyama ,  Hiroshi Harada

IPC: G03G9/107 ,  G03G9/113

CPC classification number: G03G9/1133 ,  Y10S430/105

Abstract: Magnetic carrier for use in electrophotographic development takes the form of ferrite core particles each having a resinous coating. Ferrite core particles having a limited particle size distribution are coated with a resinous composition based on a copolymer consisting essentially of ethyl methacrylate, 15 to 25% by weight of styrene, up to 2% by weight of dodecyl methacrylate, and up to 2% by weight of 2-hydroxyethyl acrylate. The magnetic carrier particles have a resistance of 8.5.times.10.sup.7 to 2.2.times.10.sup.9 .OMEGA.. This carrier has a sharp distribution of electric charge and a quick rise of charging performance. The coating is tough enough to impart durability to the carrier.

公开(公告)号：US5071726A

公开(公告)日：1991-12-10

申请号：US457123

申请日：1989-12-26

Applicant: Deepak R. Maniar

Inventor： Deepak R. Maniar

IPC: G03G9/113

CPC classification number: G03G9/1134 ,  G03G9/1132 ,  G03G9/1133 ,  G03G9/1138

Abstract: A carrier composition comprised of a core with a coating thereover comprised of a mixture of first and second polymers that are not in close proximity thereto in the triboelectric series, which mixture contains a charge enhancing additive.

Abstract translation: 一种由其上具有涂层的核心组成的载体组合物，其由在摩擦系列中不紧密接触的第一和第二聚合物的混合物组成，该混合物含有电荷增强添加剂。

公开(公告)号：US5015550A

公开(公告)日：1991-05-14

申请号：US491763

申请日：1990-03-12

Applicant: John A. Creatura ,  George R. Hsu

Inventor： John A. Creatura ,  George R. Hsu

IPC: G03G9/113

CPC classification number: G03G9/1134 ,  G03G9/1131 ,  G03G9/1133 ,  Y10S526/934

Abstract: Disclosed is a carrier and developer composition, and a process for the preparation of carrier particles with substantially stable conductivity parameters which comprises (1) providing carrier cores and a polymer mixture, (2) dry mixing the cores and the polymer mixture, (3) heating the carrier core particles and polymer mixture, whereby the polymer mixture melts and fuses to the carrier core particles; and (4) thereafter cooling the resulting coated carrier particles.

Abstract translation: 公开了一种载体和显影剂组合物，以及用于制备具有基本上稳定的电导率参数的载体颗粒的方法，其包括（1）提供载体芯和聚合物混合物，（2）干燥混合芯和聚合物混合物，（3） 加热载体芯颗粒和聚合物混合物，由此聚合物​​混合物熔化并熔合到载体芯颗粒上; 和（4）然后冷却所得涂覆的载体颗粒。

公开(公告)号：US3900414A

公开(公告)日：1975-08-19

申请号：US43794574

申请日：1974-01-30

Applicant: MEMOREX CORP

Inventor： TANCK ELINOR J ,  HULSE LAUREN L ,  KELLY PAUL P

IPC: G03G9/113 ,  G03G9/02

CPC classification number: G03G9/1133 ,  G03G9/1135 ,  Y10S430/105

Abstract: A developer mixture for developing electrostatic images made up of relatively large carrier particles having toner particles electrostatically bonded to them, the carrier particles are small metal particles coated with an acrylic resin having a glass transition temperature at least 50*C and below 100*C, with a cellulose acetate butyrate resin containing 10 - 35% by weight acetate, 10 - 40% by weight butyrate and containing less than 60% by weight acetate plus butyrate, or with mixtures of such acrylic resins and such cellulose acetate-butyrate resins.

公开(公告)号：US3811880A

公开(公告)日：1974-05-21

申请号：US23869972

申请日：1972-03-20

Applicant: ADDRESSOGRAPH MULTIGRAPH

Inventor： BROWNING L

IPC: G03G9/113 ,  G03G13/09 ,  G03G13/08

CPC classification number: G03G13/09 ,  G03G9/1133 ,  G03G9/1135

Abstract: Magnetically attractable conductive carrier particles such as iron, are treated with resins such as, for example, nitrocellulose, acrylic polymers, polyvinyl chloride polymers and chlorinated rubber. The resin as applied constitutes 2 percent by weight of the weight of iron. The treatment changes the triboelectric charge generated when the toner particles carried on the resin coated iron are separated by attraction to an electrostatic image area. The charge generated is in the range of 0.4 volts to 4.0 volts per milligram of iron and toner mixed and its magnitude will depend on the type of resin. The resin treatment also affects the direction of the toner, i.e., either positive or negative relative to the image area to be developed.