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Patent Agency Ranking
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公开(公告)号：JP3543522B2
公开(公告)日：2004-07-14
申请号：JP34926096
申请日：1996-12-27
Applicant: 富士ゼロックス株式会社
Inventor： 博 中沢 , 孝史 今井 , 和也 古田 , 正則 市村 , 謙策 栂尾 , 雅樹 橋本 , 道男 武 , 由架 石原 , 悟 石垣 , 秀一 谷口 , 秀行 赤木 , 章洋 飯塚 , 能史 飯田 , 洋 高野
Abstract: PROBLEM TO BE SOLVED: To obtain an image of high picture quality without making toner particle diameters too small by setting the relation between the weight of a toner on an image support and the level of picture quality to a specific range, controlling the particle diameters and the particle diameter distribution of the toner to specific ranges, adding an additive, and controlling a carrier configuration. SOLUTION: A color toner has average particle diameters of 3 to 9μm, and its particle diameter distribution satisfies formulae: D16v/D50v
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4.发明专利
公开(公告)号：JP3628341B2
公开(公告)日：2005-03-09
申请号：JP17856293
申请日：1993-06-28
Applicant: 富士ゼロックス株式会社
Abstract: PURPOSE:To provide a full-color toner, its production method, and image forming method using this full-color developer so that the such optimum characteristics required for a high picture quality fullcolor toner as the values of coloring property, chroma, and surface gloss of picture images, improved transparency, and decrease in hiding property, are obtained. CONSTITUTION:The full-color toner contains magenta, cyan and yellow coloring materials and a binder resin. The magenta coloring material and cyan coloring material have the value h expressed by a formula h=(l+w)/2 in the range of 0.05-0.11(mum) when l is the average major axis and w is the average minor axis of each coloring material. To produce the full-color toner, a water-base slurry containing an org. pigment is prepared, to which a resin is added to replace water in the slurry with the resin to obtain a resin dispersion piqment. Then, the resin dispersion pigment is molten and kneaded with a binder resin, and then pulverized. The fullcolor image is formed by forming a latent image on a latent image holding body and developing the latent image with the developer.
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公开(公告)号：JP3379316B2
公开(公告)日：2003-02-24
申请号：JP32865295
申请日：1995-12-18
Applicant: 富士ゼロックス株式会社
CPC classification number: G03G9/0819 , G03G9/097 , G03G9/107
Abstract: An electrostatic-image developer which comprises a toner and a carrier comprising core particles coated with a coating resin, wherein the toner comprises toner particles having a volume-average particle diameter of from 3 to 9 mu m and having a specific particle diameter distribution, at least 20% of the total surface area of the toner particles is covered with (a) an external additive having an average particle diameter of from 20 nm to 100 nm, and at least 40% of the total surface area of the toner particles is covered with (b) an external additive having an average particle diameter of from 7 nm to 20 nm, and wherein the core particles of the carrier are magnetic particles formed from a composition comprising 100 parts by weight of a ferrite component represented by the following formula (3): (MyO)100-x(Fe2O3)x (wherein M is a metal atom selected from the group consisting of Li, Mg, Ca and Mn; x is from 45 to 95 mol%; and y is 1 or 2) and from 0.01 to 10 parts by weight of an oxide of at least one element selected from the group consisting of Groups IA, IIA, IIIA, IVA, VA, IIIB, IVB, and VB of the periodic table by granulating the composition and sintering the granules, and the magnetic particles have a silicon content of from 500 to 5,000 ppm. An image forming process using the developer is also disclosed.
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