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1. 发明专利

JP2000187358A ELECTROPHOTOGRAPHIC COLOR TONER, ELECTROPHOTOGRAPHIC DEVELOPER AND IMAGE FORMING METHOD 失效
公开(公告)号：JP2000187358A
公开(公告)日：2000-07-04
申请号：JP1103299
申请日：1999-01-19
申请人： FUJI XEROX CO LTD
发明人： YOSHIDA SATOSHI , NAKAMURA MASAKI , YASUDA SUSUMU , TAKASHIMA KOICHI , ISHIZUKA DAISUKE
IPC分类号： G03G9/087 , G03G7/00 , G03G9/08 , G03G9/09 , G03G9/097 , G03G15/20
摘要： PROBLEM TO BE SOLVED: To obtain electrophotographic color toner which ensures a wide fixable temperature range without impairing various characteristics peculiar to the conventional toner, prevents permeation even into paper other than color printing paper while maintaining high image quality and high color forming capability and does not cause deterioration of image quality. SOLUTION: The electrophotographic color toner comprises toner particles containing at least a colorant, a binder resin and light-colored or colorless fine particles. The number of toner particles containing light-colored or colorless fine particles of >=1.0 μm particle diameter is half or less for all the toner particles.

2. 发明专利

JPH09197882A IMAGE FORMING METHOD AND ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER 失效
公开(公告)号：JPH09197882A
公开(公告)日：1997-07-31
申请号：JP758296
申请日：1996-01-19
申请人： FUJI XEROX CO LTD
发明人： YOSHIDA SATOSHI , NAKAMURA MASAKI , TAKASHIMA KOICHI
IPC分类号： G03G9/087 , G03G15/20
摘要： PROBLEM TO BE SOLVED: To provide an image fixing method which is capable of eliminating or lessening the use of a release agent, is consequently capable of lessening the adhesion of oil to a recording material and images after fixing and embodying the reduction of the size and cost of a fixing device, improves an offset resistance characteristic, enhances the smoothness of the image surfaces after fixing and provides high image quality and high color development. SOLUTION: This method has a stage for thermally fixing the toner image on a member to be transferred. The toners have coloring agents and binder resin. This binder resin contains a crystalline resin. In addition, the content of components of a mol.wt. of mg/cm .

3. 发明专利

JPH09171287A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH09171287A
公开(公告)日：1997-06-30
申请号：JP33229095
申请日：1995-12-20
申请人： FUJI XEROX CO LTD
发明人： NODA AKIHIKO , YAMAGUCHI YOSHIRO , TAKASHIMA KOICHI , KIN ISHI , YOSHINO SUSUMU
IPC分类号： G03G9/107 , G03G13/09 , G03G15/06 , G03G15/08 , G03G15/09
摘要： PROBLEM TO BE SOLVED: To excellently and stably express a halftone image based on binary information by applying a two-component developing method hating saturation characteristic to a binarized electrostatic latent image. SOLUTION: A photoreceptor 1, an electrifying means 2 and an exposure means 6 are adjusted so that the binarized electrostatic latent image may be formed on the photoreceptor 1. Then, a developing means 3 is adjusted so that the amount of toner used for development with respect to contrast potential decided according to developing bias voltage impressed on a developer carrier and the surface potential of the photoreceptor 1 may exhibit the saturation characteristic and also the developing bias voltage within a saturation area may be impressed on the developer carrier. In order to obtain developing characteristic making the saturation characteristic compatible with stability and durability, a two-component magnetic brush developing system is suitable for the developing means 3. Thus, gradation expression stable to the change and the unevenness of the sensitivity of the photoreceptor 1 is realized.

4. 发明专利

JPH09160305A CARRIER FOR ELECTROSTATIC LATENT IMAGE DEVELOPER, ELECTROSTATIC LATENT IMAGE DEVELOPER AND IMAGE FORMING METHOD 失效
公开(公告)号：JPH09160305A
公开(公告)日：1997-06-20
申请号：JP31639995
申请日：1995-12-05
申请人： FUJI XEROX CO LTD
发明人： KIN ISHI , YOSHINO SUSUMU , TAKASHIMA KOICHI
IPC分类号： G03G9/09 , G03G9/113 , G03G15/08
摘要： PROBLEM TO BE SOLVED: To obtain such a long-life carrier for an electrostatic latent image developer that greatly improves reproducibility for a halftone image without increasing resistance of a developer but improves durability, by dispersing carbon black subjected to surface oxidation treatment in a resin and forming the resin coating layer on the carrier particles. SOLUTION: Carbon black subjected to surface oxidation treatment is dispersed in a resin to form a coating layer on a core material so that aggregation among carbon black particles is promoted to form a dense conductive path. The average diameter of the carbon black is preferably 0.02 to 1μm. The proper amt. of the carbon black compounded is 0.05-30wt.%, preferably 1-10wt.%. The surface energy of the carbon black is preferably 50-60mJ/m by IGC method and ESCA method. As for the core material of the carrier, magnetic metals such as iron, steel, nickel and cobalt and magnetic oxides such as ferrite and magnetite can be used.

5. 发明专利

JPH06242627A MICROCAPSULE TONER AND ITS SURFACE REFORMING METHOD AND IMAGE FORMING METHOD 失效
公开(公告)号：JPH06242627A
公开(公告)日：1994-09-02
申请号：JP4992793
申请日：1993-02-17
申请人： FUJI XEROX CO LTD
发明人： FURUTA KAZUYA , MATSUI IZURU , TAKASHIMA KOICHI
IPC分类号： G03G9/08 , G03G9/087 , G03G15/16 , G03G15/20 , G03G15/24
摘要： PURPOSE:To provide the microcapsule toner which sustantially prevents the desorption of lubricant particulates added thereto from the toner and does not, therefore, generate the staining in a copying machine and printing machine and the contamination of carriers and the surface reforming method for the toner. CONSTITUTION:This microcapsule has a lubricant fixed by an impact type blow means on the surfaces of microcapsule toner particles contg. a liquid material in a core consisting of a pressure fixable component. The lubricant consists of at least one kind selected from among fatty acid, fatty acid metal salt, aliphat. alcohol, fatty acid amide, fatty acid bisamide and fatty acid ester. The surface-reformed microcapsule toner is produced by using a reforming device which consists of the rotating impact type blow means (impact pin) 14 and a circulation circuit 15 which is mounted to the outer peripheral part of the device and circulating the toner particles arriving at the outer peripheral part of the device to the central part of the impact type blow means through an external circulation path while subjecting the particles to a fixing treatment of the lubricant particles by the impact type blow means, thereby subjecting the toner particles to the repeating treatment.

6. 发明专利

JPH06230598A ELECTROPHOTOGRAPHIC CAPSULE TONER 失效
公开(公告)号：JPH06230598A
公开(公告)日：1994-08-19
申请号：JP34795091
申请日：1991-12-03
申请人： FUJI XEROX CO LTD
发明人： TOMITA KAZUFUMI , INABA YOSHIHIRO , TAKASHIMA KOICHI
IPC分类号： G03G9/08
摘要： PURPOSE:To provide a capsule toner having high mechanical strength, excellent negative electrification property, and sharp electrification distribution with which copy images of excellent picdture quality can be produced and cleaing can be preferably performed at a low temp. and a low humidity. CONSTITUTION:This electrophotographic capsule toner consists of toner particles and a polymer containing sulfonic acid group-contg. vinyl monomers expressed by the formula as the monomer component deposited on the toner particles. The toner particle has a material which can produce radical at least on its surface. A conductive fine powder is externally added to the toner. In the formula, R1 is hydrogen atom or an alkyl group of 1-3 carbon number, X is -(CH2)n-, -CONHC(R2)(R3)R4-, -COO(CH2)m-, or -CONH-, (n) is an integer 0 to 20, R2 and R3 are hydrogen atoms or alkyl groups of 1-20 carbon number, R4 is an alkylene group of 1-20 carbon number, (m) is an integer 1 to 20, M is a cation and (q) is an integer 1 to 3.

7. 发明专利

JPH0519523A ELECTROPHOTOGRAPHIC TONER 失效
公开(公告)号：JPH0519523A
公开(公告)日：1993-01-29
申请号：JP20004091
申请日：1991-07-15
申请人： FUJI XEROX CO LTD
发明人： TOMITA KAZUFUMI , INABA YOSHIHIRO , KUBO TSUTOMU , MATSUI IZURU , TAKASHIMA KOICHI
IPC分类号： G03G9/08
摘要： PURPOSE:To obtain the toner which has the good environmental stability of electrostatic charge, is sharpe in electrostatic charge distribution and does not generate cleaning defects even at and under a low temp. and low humidity by adding conductive fine particles to the particle surfaces of the capsule toner stuck with a specific polymer on the surfaces. CONSTITUTION:The capsule toner stuck with the polymer contg. the fluorine- contg. vinyl monomers expressed by formula I or formula II as a monomer component has the conductive fine particles on the particle surfaces. In the formulas I, II, X denotes -COO-,-OCO-, -O-, or p-phenylene group; R1, R2 denote a hydrogen atom or 1 to 3C alkyl group; m denotes 0 to 7 integer; n denotes 0 to 19 integer; o and p denote 0 to 7 integer; Y denotes a hydrogen atom or fluorine atom. The conductive fine particles are the electron conductive fine particles having the lower dependency of the electric conductivity on the humidity and are more particularly preferably, for example, carbon black, tin oxide and titanium oxide.

8. 发明专利

JPH04330457A CAPSULE TONER 失效
公开(公告)号：JPH04330457A
公开(公告)日：1992-11-18
申请号：JP21317791
申请日：1991-07-31
申请人： FUJI XEROX CO LTD
发明人： KUBO TSUTOMU , INABA YOSHIHIRO , MATSUI IZURU , TAKASHIMA KOICHI
IPC分类号： G03G9/08 , G03G9/087
摘要： PURPOSE:To excellently fix with small sized fixing device without deterioration of an organic sensitive body by using a specific polybutadiene compound as a polymer compound of a core material. CONSTITUTION:In a capsule toner consisting of a core material and shell material coating the core material, the core material contains a polybutadiene compound having branched vinyl group expressed by the formula I. The coating material used in the core material is an inorganic pigment such as carbon black, red iron oxide. prussian blue, titan dioxide and azo pigment such as fast yellow, diazo yellow, pyrazolone red, chelete red, brilliant carmine, parabrown and a phthlocyanine pigment such as copper phthalocyanine, non- metal phthalocyanine and a condensated polycyclic pigment such as flavanthrone yellow, dibromoanthrone orange, perylene red, quinacridone red, dioxadine violet.

9. 发明专利

JPH04145447A PRODUCTION OF TONER 失效
公开(公告)号：JPH04145447A
公开(公告)日：1992-05-19
申请号：JP26831790
申请日：1990-10-08
申请人： FUJI XEROX CO LTD
发明人： INABA YOSHIHIRO , KUBO TSUTOMU , TAKASHIMA KOICHI
IPC分类号： G03G9/08 , G03G9/087
摘要： PURPOSE:To ensure a high degree of freedom of selection of materials and to produce a toner having satisfactory environmental stability of electrostatic charge at a low cost without requiring a special reactor or complex operation by allowing a specified polymer to exist on the surfaces of toner particles and carrying out ion exchange treatment. CONSTITUTION:A polymer contg. a vinyl monomer having a quat. ammonium group contg. a halogen ion as the anion component is allowed to exist on the surfaces of toner particles and ion exchange treatment is carried out to exchange the halogen ion for other anion. The toner particles have a capsule structure consisting of a core substance and a shell and the pref. resin of the shell is polyurea resin, polyurethane resin, polyamide resin, polyester resin, epoxy resin, epoxy urea resin or epoxy urethane resin.

10. 发明专利

JPH04125654A ELECTROPHOTOGRAPHIC TONER 失效
公开(公告)号：JPH04125654A
公开(公告)日：1992-04-27
申请号：JP24833190
申请日：1990-09-18
申请人： FUJI XEROX CO LTD
发明人： KUBO TSUTOMU , IMAI TAKASHI , MATSUI IZURU , INABA YOSHIHIRO , TAKASHIMA KOICHI
IPC分类号： G03G9/097
摘要： PURPOSE:To obtain the toner having good electrostatic chargeability and flowability by adding an external additive having the polar group different from the polar group of the polarity control agent on the surface of the toner to the toner. CONSTITUTION:The external additive having the polar group different from the polar group of the polarity control agent on the surface of the toner is added to the toner. For example, the toner surface eventually has an amino group if a nigrosine dye generally used as the polarity control agent is used and, therefore, a metal oxide treated with an alkyl coupling agent, a metal oxide treated with a quaternary ammonium coupling agent, etc., are used as the surface treating agent of the external additive. The amt. of the external additive to be used is determined by the electrostatic chargeability, staining of a photosensitive body, etc. The toner having the stable electrostatic chargeability and flowability in spite of an environmental change and after long-term resting is obtd. in this way.

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