EP0445986A1 - Développeur à un composant non magnétique et procédé de développement - Google Patents

Développeur à un composant non magnétique et procédé de développement Download PDF

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Publication number
EP0445986A1
EP0445986A1 EP91301720A EP91301720A EP0445986A1 EP 0445986 A1 EP0445986 A1 EP 0445986A1 EP 91301720 A EP91301720 A EP 91301720A EP 91301720 A EP91301720 A EP 91301720A EP 0445986 A1 EP0445986 A1 EP 0445986A1
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EP
European Patent Office
Prior art keywords
magnetic
development
developer
average particle
particle diameter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP91301720A
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German (de)
English (en)
Inventor
Hiromitsu Kikuchi
Makoto C/O Nippon Zeon Co. Ltd. Watanabe
Fumio Yamada
Jun Saito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zeon Corp
Original Assignee
Nippon Zeon Co Ltd
Casco Nobel AB
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Publication date
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Application filed by Nippon Zeon Co Ltd, Casco Nobel AB filed Critical Nippon Zeon Co Ltd
Publication of EP0445986A1 publication Critical patent/EP0445986A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/0821—Developers with toner particles characterised by physical parameters
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/0819—Developers with toner particles characterised by the dimensions of the particles
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/0827—Developers with toner particles characterised by their shape, e.g. degree of sphericity

Definitions

  • the present invention relates to a developer suitable for use in copying machines according to electrophotography and electrostatic recording apparatus, and a development process, and more specifically to a non-magnetic one-component developer excellent in image properties such as image density, resolution and tone reproduction, and a development process making use of the developer.
  • a magnetic one-component developer comprising a magnetic powder is involved in the one-component developers.
  • This one-component developer makes use of a magnetic toner having a relatively low specific resistance. It is therefore difficult to electro-statically transfer an image developed on an electrostatic latent image to a support material such as plain paper.
  • it is impossible to produce color developers because the magnetic one-component developer comprises a large amount of the magnetic powder as a toner.
  • the non-magnetic one-component developer generally comprises a binder resin and a colorant such as carbon black and has an advantage in that color developers are obtained.
  • non-magnetic toner A development process making use of a non-magnetic one-component developer (hereinafter may referred to as "non-magnetic toner") is performed in the following manner by using, for example, a developing apparatus illustrated in FIG. 1.
  • the developing apparatus comprises a photosensitive body 1 and a toner container 2, which is disposed in the vicinity of the photosensitive body 1 and contains a development roll 3 brought into contact under pressure with the photosensitive body 1 and a toner feed roll 4.
  • a development bias voltage is applied to the development roll 3 through an electric source.
  • a one-component developer 6 composed of a non-magnetic toner is contained in the toner container 2.
  • the non-magnetic toner 6 borne on the surface of the roll 4 is transferred to the contact surface with the development roll 3.
  • the non-magnetic toner 6 is further transferred to the photosensitive body 1 as the development roll 3 is rotated, thereby developing an electrostatic latent image formed on the photosensitive body 1.
  • a layer-thickness regulator 7 for controlling the layer of the non-magnetic toner 6 adhered to the surface of the development roll 3 to a uniform thickness.
  • It is an object of this invention is to provide a non-magnetic one-component developer, which can be stably supplied to form a thin, uniform toner layer, has good reproductivity for an electrostatic latent image on a photosensitive body, can impart high image density owing to the fact that a sufficient amount of the non-magnetic toner can be transferred from the development roll, and does not bring about defects such as scumming in non-image areas.
  • Another object of this invention is to provide a development process making use of the non-magnetic one-component developer having such excellent properties.
  • a further object of this invention is to provide, in particular, a process for developing in accordance with the reversal development system in which a toner has the same polarity as that of an electrostatic latent image formed on a photosensitive body and/or a process for developing by bringing an electrostatic latent image formed on a photosensitive body into direct contact with a development roll.
  • the present inventors have carried out an extensive investigation with a view toward overcoming the problems involved in the prior art. As a result, it has been found that the above-mentioned objects can be attained by controlling the shape, particle diameter, particle size distribution, charge level and the like of a non-magnetic toner to specifically limited ranges.
  • the present invention has been led to completion on the basis of this finding.
  • a non-magnetic one-component developer suitable for use in a process for developing an electrostatic latent image formed on a photosensitive body with a developer by using a development apparatus equipped with a development roll and a development blade for controlling a layer of the developer supplied on the development roll to a uniform thickness, characterized in that the developer comprises a binder resin and a colorant, and has the following physical properties:
  • a development process which comprises using the non-magnetic one-component developer as a developer.
  • a process for developing in accordance with the reversal development system in which an electrostatic latent image formed on a photosensitive body has the same polarity as that of a non-magnetic one-component developer and a process for developing by bringing an electrostatic latent image formed on a photosensitive body into direct contact with a development roll.
  • the substantially spherical non-magnetic one-component developer may be prepared by polymerizing an intimate mixture containing at least one vinyl monomer and at least one colorant by a suspension polymerization process.
  • Sc/Sr is a value obtained by measuring and analyzing a developer by an image processing and analyzing apparatus under the following conditions:
  • the specific surface area (A) as measured in accordance with the BET method is a value measured by means of an automatic specific surface area meter, "Model 2200", manufactured by Shimadzu Corporation, and both volume-average particle diameter (dv) and number-average particle diameter (dn) are values measured by means of a Coulter counter ("Model TA-II", manufactured by Nikkaki K.K.), and the true specific gravity (D) is a value measured by a Beckmann specific gravimeter.
  • FIG. 1 is a fragmentary sectional view showing one illustrative construction of developing apparatus to which a non-magnetic one-component developer according to this invention can be applied.
  • Toners have heretofore been prepared by melting and kneading a mixture containing a binder resin and a colorant, cooling the thus-kneaded mixture, grinding it by a grinder and then classifying the thus-ground mixture to make its particle diameter uniform.
  • particles of the toners obtained by such a grinding system are indeterminate in shape.
  • the quotient (Sc/Sr) obtained by dividing the area (Sc) of a circle supposing the absolute maximum length of a particle is a diameter by the real projected area (Sr) of the particle generally exceeds 1.3.
  • the toner having the shape and properties as described above is poor in flowability. Therefore, when the toner is used as a developer in the above-described development process, a layer of the toner supplied on the development roll becomes uneven, resulting in an image having low density in image areas and full of unevenness in density and of scumming in non-image areas.
  • the non-magnetic toner according to the present invention has an Sc/Sr value in a range of 1.00-1.30 and an A*dn*D value in a range of 5-10 and hence is substantially spherical in particle shape, its flowability is good.
  • the ratio (dv/dn) of the volume-average particle diameter (dv) to the number-average particle diameter (dn) is in a range of 1.00-1.40, preferably, of 1.00-1.25
  • the ratio (Q/A) of the charge level (Q) ( ⁇ c/g) as measured in accordance with the blow-off method (carrier: TEFV 150/250, toner concentration: 5%, measured after mixing and stirring for 30 minutes at a rotational speed of 150 rpm) to the specific surface area (A) is in a range of 15-70, preferably, of 20-60, among substantially spherical toners having above-described features, is used as a developer in the above development process, a uniform, thin layer of the toner is formed on the development roll, the denseness of the toner onto a latent image formed on the photosensitive body becomes good and the toner particles come to have
  • the triboelectrifying characteristics between the surface of the development roll and the layer-thickness regulator for the toner also become fixed and uniform, so that no scumming occurs in non-image areas even when the toner is used in the contact development system in which an electrostatic latent image formed on the photosensitive body is brought into direct contact with the development roll.
  • the non-magnetic toner of this invention is substantially removed from the photosensitive body.
  • a small amount of the toner remaining on the photosensitive body, which has not been removed, is also removed by the development roll at the same time as the development in the next developing process. It is therefore possible to obtain stable and good images even in long-term continuous development.
  • any non-magnetic toners whose volume-average particle diameter (dv) is smaller than 5 ⁇ m or exceeds 15 ⁇ m fails to make the layer of the toner on the development roll uniform. Alternatively, its transfer efficiency becomes poor, so that a sufficient image density cannot be obtained.
  • the non-magnetic toner according to the present invention can be obtained by polymerizing an intimate mixture containing at least one vinyl monomer and at least one colorant by a suspension polymerization process.
  • a specific suspension polymerization process there is, for example, a process in which a mixture comprising a vinyl monomer, a colorant and a radical polymerization initiator, and as optional components, various kinds of additives is intimately dispersed by a ball mill or the like to prepare an intimate mixture and the thus-obtained intimate mixture is then finely dispersed in water under high-shear stirring into an aqueous dispersion, thereby subjecting the dispersion to suspension polymerization at a temperature of 30-200°C in general.
  • styrene monomers such as styrene, vinyltoluene and ⁇ -methylstyrene
  • acrylic acid methacrylic acid
  • derivatives of acrylic acid and methacrylic acid such as methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate, dimethylaminoethyl methacrylate, acrylonitrile and acrylamide
  • ethylenically unsaturated monoolefins such as ethylene, propylene and butylene
  • vinyl halides such as vinyl chloride, vinylidene chloride and vinyl fluoride
  • vinyl esters such as vinyl acetate and vinyl propionate
  • vinyl ethers such as vinyl methyl acrylate
  • vinyl halides such as vinyl
  • optional crosslinking agents for example, aromatic divinyl compounds such as divinylbenzene, divinylnaphthalene and derivatives thereof; ethylenically unsaturated dicarboxylicesters such as ethylene glycol dimethacrylate and diethylene glycol dimethacrylate; divinyl compounds such as N,N-divinylaniline and divinyl ether; and compounds containing at least three vinyl groups may be used either singly or in combination.
  • aromatic divinyl compounds such as divinylbenzene, divinylnaphthalene and derivatives thereof
  • ethylenically unsaturated dicarboxylicesters such as ethylene glycol dimethacrylate and diethylene glycol dimethacrylate
  • divinyl compounds such as N,N-divinylaniline and divinyl ether
  • compounds containing at least three vinyl groups may be used either singly or in combination.
  • colorants useful in the practice of this invention, may be mentioned pigments and dyes such as carbon black, aniline black, crystal violet, rhodamine B, malachite green, nigrosine, copper phthalocyanine and azo dyes. These colorants may be used either singly or in combination.
  • charge control agent in this field, such as nigrosine dyes, monoazo dyes, metallized dyes, zinc hexadecylsuccinate, alkyl esters and alkyl amides of naphthoic acid, nitrohumic acid, N,N′-tetramethyldiamine benzophenone, N,N′-tetramethylbenzidine, triazine and metal complexes of salicylic acid may be contained.
  • non-magnetic toner it is also possible to simultaneously contain or subsequently add, into the non-magnetic toner according to this invention, at least one of various additives for controlling charge characteristics, electric conductivity, flowability or adhesion properties to a photosensitive body or fixing roll.
  • Such additives may include releasing agents such as low-molecular weight polyethylene, low-molecular weight polypropylene, various kinds of waxes and silicone oils;
  • inorganic fine powders such as carbon black powder, silica powder, alumina powder, titanium oxide powder, zinc oxide powder cerium oxide powder and calcium oxide powder; and the like.
  • the non-magnetic toner according to this invention is used in a process in which an electrostatic latent image formed on the surface of a photosensitive body is developed with a developer by a developing apparatus equipped with a development roll and a development blade for controlling a layer of the developer supplied on the development roll to a uniform thickness.
  • a non-magnetic toner that when it is used in a process in which an electrostatic latent image formed on the surface of a photosensitive body is developed with the developer by a developing apparatus equipped with a development roll and a development blade for controlling a layer of the developer supplied on the development roll to a uniform thickness, its denseness onto the latent image is good, its transfer efficiency in a transferring process is high and hence, a vivid image having high density in image areas and free of any dust and unevenness can be formed and moreover, a high image quality free of any scumming in non-image areas can be attained, as compared with the toners in the prior art.
  • non-magnetic toner which can provide a stable image quality free from the reduction in image density, increase in scumming, occurrence of ghost images and the like even in long-term continuous development, and a development process making use of the toner.
  • Dispersed in a ball mill were 70 parts of styrene, 30 parts of butyl methacrylate, 4 parts of low-molecular weight polypropylene, 10 parts of carbon black ("Printex 150T”, trade name), 1.0 part of a Cr dye ("Bontron S-34", trade name) and 2 parts of 2,2′-azobis(2,4-dimethylvaleronitrile), thereby obtaining an intimate mixture.
  • the mixture was then added into 350 parts of purified water with 5 parts of calcium phosphate finely dispersed therein to obtain an aqueous dispersion.
  • the thus-obtained aqueous dispersion was subjected to high-shear agitation by a rotor-stator type homomixer under conditions of at least pH 9 to finely disperse the mixture in water.
  • This aqueous dispersion was then charged in a reactor equipped with an agitating blade to polymerize the monomer component under stirring for 4 hours at 65°C. After the thus-obtained polymer dispersion was thoroughly washed with an acid and water, the resultant polymer was separated and dried to obtain a toner material.
  • hydrophobic silica as a flowability-imparting agent was added to 100 parts of the toner material to obtain a non-magnetic toner.
  • the thus-obtained non-magnetic toner was composed of substantially spherical particles having properties shown in Table 1.
  • an apparatus containing an developing machine of the contact development system which basically has the construction illustrated in FIG. 1, and comprises a photosensitive body 1 making use of an organic photosensitive body, a development roll 3 comprising an electroconductive support of a metallic core and a rubbery toner-bearing layer provided on the outer peripheral surface of the support, and a layer-thickness regulator 7 for the toner made of a urethane rubber.
  • the resulting images had high density in image areas, and were free of any scumming in non-image areas, dust and unevenness and hence vivid, and moreover stable in image quality even in twenty thousand-sheet continuous developing.
  • a toner material having a volume-average particle diameter (dv) smaller than that in Example 1 was obtained in the same manner as in Example 1 except that 0.3 part of a Cr dye ("Spiron Black TRH", trade name) was used instead of 1.0 part of the Cr dye ("Bontron S-34", trade name) in Example 1, and 400 parts of purified water with 6 parts of calcium phosphate finely dispersed therein were used as a dispersion medium.
  • dv volume-average particle diameter
  • the thus-obtained non-magnetic toner had a volume-average particle diameter (dv) as fine as 5.9 ⁇ m and a particle size distribution (the dv/dn ratio) as narrow as 1.20 and was composed of substantially spherical particles having properties shown in Table 1.
  • the resulting images had high density in image areas, and were free of any scumming in non-image areas, dust and unevenness, and moreover extremely good in tone reproduction and definition.
  • a toner material having a Q/A ratio greater than that in Example 1 was obtained in the same manner as in Example 1 except that 5 parts of carbon black ("Printex 150T”, trade name) and 3.0 parts of a Cr dye ("Bontron S-34", trade name) were used as colorants in Example 1.
  • non-magnetic toner was composed of substantially spherical particles having properties shown in Table 1.
  • the resulting images had high density in image areas, and were free of any scumming in non-image areas, dust and unevenness, and hence vivid.
  • non-magnetic toner had a shape factor (Sc/Sr) of 1.53 and a product (A*dn*D) of 14.6 as shown in Table 1, and was composed of particles having different particle shapes.
  • a toner material was obtained in the same manner as in Example 1 except that the Cr dye ("Bontron S-34", trade name) was not used in Example 1.
  • hydrophobic silica as a flowability-imparting agent was added to 100 parts of the toner material to obtain a non-magnetic toner.
  • the thus-obtained non-magnetic toner was composed of substantially spherical particles as shown in Table 1, but had a charge level (Q) ( ⁇ c/g) to specific surface area (A) ratio (Q/A) as low as 13.
  • the resulting images had low density in image areas, scummed over non-image areas and were full of unevenness.
  • a non-magnetic toner was obtained in the same manner as in Example 1 except that 5.0 parts of a Cr dye ("Spiron Black TRH", trade name) were used instead of 1.0 part of the Cr dye ("Bontron S-34", trade name) in Example 1.
  • the thus-obtained non-magnetic toner was in a substantially spherical form as shown in Table 1, but had a charge level (Q) ( ⁇ c/g) to specific surface area (A) ratio (Q/A) as high as 79.
  • the resulting images had low density in image areas and were full of dust, and moreover ghost images were formed in their non-image areas due to high adhesion of the toner to the photosensitive body.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Developing Agents For Electrophotography (AREA)
EP91301720A 1990-03-08 1991-03-01 Développeur à un composant non magnétique et procédé de développement Withdrawn EP0445986A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP57727/90 1990-03-08
JP2057727A JP2805653B2 (ja) 1990-03-08 1990-03-08 非磁性一成分現像剤

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EP0445986A1 true EP0445986A1 (fr) 1991-09-11

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AU (1) AU7203591A (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2258053A (en) * 1991-07-24 1993-01-27 Nippon Zeon Co Non magnetic one component developer
EP0573933A1 (fr) * 1992-06-08 1993-12-15 Canon Kabushiki Kaisha Procédé de formation d'image
EP0614127A1 (fr) * 1993-02-10 1994-09-07 Hitachi, Ltd. Toner, son procédé de fabrication et appareil de formation d'images l'utilisant
EP0708377A1 (fr) * 1994-10-04 1996-04-24 Mita Industrial Co., Ltd. Révélateur pour le développement non magnétique à un composant, et méthode de développement par contact l'utilisant
EP0715218A1 (fr) * 1994-11-29 1996-06-05 Agfa-Gevaert N.V. Un révélateur sec pour des procédés d'impression électrostatiques directes
EP0745904A3 (fr) * 1995-06-02 1997-07-02 Konishiroku Photo Ind Révélateur pour le développement d'images latentes, électrostatiques, agent de développement, et procédé de production d'image utilisant ce révélateur
GB2309791A (en) * 1996-01-31 1997-08-06 Ricoh Kk Toner for electrostatic images
EP0822456A1 (fr) * 1996-07-31 1998-02-04 Canon Kabushiki Kaisha Révélateur pour le développement d'images électrostatiques et méthode de formation d'images
US6183924B1 (en) 1997-08-29 2001-02-06 Daimippon Ink And Chemicals, Inc. Electrostatic image developer
US6203957B1 (en) 1999-01-29 2001-03-20 Dianippon Ink And Chemicals, Inc. Spherical toner particle
EP1146397A1 (fr) * 2000-04-12 2001-10-17 Mitsubishi Chemical Corporation Cartouche pour procédé électrophotographique et appareil de production d' image
EP1302820A2 (fr) * 2001-10-16 2003-04-16 Konica Corporation Appareil de formation d'images et méthode de formation d'images
EP1308790A3 (fr) * 2001-11-02 2003-09-03 Ricoh Company, Ltd. Révélateur pour le développement d' images électrostatiques, méthode pour sa production, agent de développement comprenant ledit révélateur, récipient contenant ledit révélateur, et procédé de développement utilisant ledit révélateur
US6963711B2 (en) 2001-03-21 2005-11-08 Fuji Xerox Co., Ltd. Developing method and developing device for electrophotographic image, and printing device using the developing device

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69721607T2 (de) * 1996-02-20 2004-03-18 Canon K.K. Bildherstellungsverfahren
WO1998006012A1 (fr) * 1996-08-06 1998-02-12 Nippon Zeon Co., Ltd. Appareil de formation d'image et procede de formation d'image
DE69804046T2 (de) * 1997-04-30 2002-08-01 Canon K.K., Tokio/Tokyo Bildherstellungsverfahren führend zu einer Kontrolle der Restladung als Resultat einer ausgewählten Tonerzusammensetzung
JPH1172960A (ja) * 1997-08-29 1999-03-16 Dainippon Ink & Chem Inc 粉体トナー
JPH1172961A (ja) * 1997-08-29 1999-03-16 Dainippon Ink & Chem Inc カラートナー
WO2000013063A1 (fr) * 1998-08-27 2000-03-09 Nippon Zeon Co., Ltd. Revelateur monocomposant non magnetique et procede de developpement

Citations (3)

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Publication number Priority date Publication date Assignee Title
GB2091435A (en) * 1980-12-18 1982-07-28 Konishiroku Photo Ind Toner for developing electrostatic latent images
EP0154433A1 (fr) * 1984-02-17 1985-09-11 Mita Industrial Co. Ltd. Méthode de développement des images électrostatiques
EP0335676A2 (fr) * 1988-03-30 1989-10-04 Canon Kabushiki Kaisha Révélateur pour le développement d'images électrostatiques et procédé de production d'image

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2091435A (en) * 1980-12-18 1982-07-28 Konishiroku Photo Ind Toner for developing electrostatic latent images
EP0154433A1 (fr) * 1984-02-17 1985-09-11 Mita Industrial Co. Ltd. Méthode de développement des images électrostatiques
EP0335676A2 (fr) * 1988-03-30 1989-10-04 Canon Kabushiki Kaisha Révélateur pour le développement d'images électrostatiques et procédé de production d'image

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 341 (P-758)(3188) 13 September 1988, & JP-A-63 100466 (NIPPON PAINT CO. LTD.) 02 May 1988, *

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4224557B4 (de) * 1991-07-24 2006-11-16 Nippon Zeon Co., Ltd. Nichtmagnetischer Einkomponenten-Entwickler und Entwicklungsverfahren
US5328792A (en) * 1991-07-24 1994-07-12 Nippon Zeon Co., Ltd. Non-magnetic one-component developer and development process
GB2258053B (en) * 1991-07-24 1995-10-18 Nippon Zeon Co Non-magnetic one-component developer and development process
GB2258053A (en) * 1991-07-24 1993-01-27 Nippon Zeon Co Non magnetic one component developer
EP0573933A1 (fr) * 1992-06-08 1993-12-15 Canon Kabushiki Kaisha Procédé de formation d'image
US5849453A (en) * 1992-06-08 1998-12-15 Canon Kabushiki Kaisha Image forming method including recycling of untransferred toner collected from image bearing member to developing means
EP0614127A1 (fr) * 1993-02-10 1994-09-07 Hitachi, Ltd. Toner, son procédé de fabrication et appareil de formation d'images l'utilisant
US5460914A (en) * 1993-02-10 1995-10-24 Hitachi, Ltd. Toner, method for manufacturing same, and imaging apparatus using same
EP0708377A1 (fr) * 1994-10-04 1996-04-24 Mita Industrial Co., Ltd. Révélateur pour le développement non magnétique à un composant, et méthode de développement par contact l'utilisant
US5614348A (en) * 1994-10-04 1997-03-25 Mita Industrial Co., Ltd. Toner for non-magnetic one-component development and method for contact type development using the same
EP0715218A1 (fr) * 1994-11-29 1996-06-05 Agfa-Gevaert N.V. Un révélateur sec pour des procédés d'impression électrostatiques directes
EP0745904A3 (fr) * 1995-06-02 1997-07-02 Konishiroku Photo Ind Révélateur pour le développement d'images latentes, électrostatiques, agent de développement, et procédé de production d'image utilisant ce révélateur
US5830617A (en) * 1995-06-02 1998-11-03 Konica Corporation Toner for developing an electrostatic latent image, Developer and a method of producing an image using the toner
GB2309791B (en) * 1996-01-31 1998-04-22 Ricoh Kk Toner for developing electrostatic images
US5912100A (en) * 1996-01-31 1999-06-15 Ricoh Company, Ltd. Toner for developing electrostatic images
GB2309791A (en) * 1996-01-31 1997-08-06 Ricoh Kk Toner for electrostatic images
EP0822456A1 (fr) * 1996-07-31 1998-02-04 Canon Kabushiki Kaisha Révélateur pour le développement d'images électrostatiques et méthode de formation d'images
US6033817A (en) * 1996-07-31 2000-03-07 Canon Kabushiki Kaisha Toner for developing electrostatic image and image forming method
US6183924B1 (en) 1997-08-29 2001-02-06 Daimippon Ink And Chemicals, Inc. Electrostatic image developer
US6203957B1 (en) 1999-01-29 2001-03-20 Dianippon Ink And Chemicals, Inc. Spherical toner particle
EP1146397A1 (fr) * 2000-04-12 2001-10-17 Mitsubishi Chemical Corporation Cartouche pour procédé électrophotographique et appareil de production d' image
US6963711B2 (en) 2001-03-21 2005-11-08 Fuji Xerox Co., Ltd. Developing method and developing device for electrophotographic image, and printing device using the developing device
EP1302820A2 (fr) * 2001-10-16 2003-04-16 Konica Corporation Appareil de formation d'images et méthode de formation d'images
EP1308790A3 (fr) * 2001-11-02 2003-09-03 Ricoh Company, Ltd. Révélateur pour le développement d' images électrostatiques, méthode pour sa production, agent de développement comprenant ledit révélateur, récipient contenant ledit révélateur, et procédé de développement utilisant ledit révélateur
CN1327300C (zh) * 2001-11-02 2007-07-18 株式会社理光 静电荷图像显影用色调剂
EP1868039A3 (fr) * 2001-11-02 2008-02-20 Ricoh Company, Ltd. Toner pour le développement d'une image électrostatique, développeur incluant le toner, récipient contenant le toner, et procédé de développement utilisant le toner

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JPH03259161A (ja) 1991-11-19
AU7203591A (en) 1991-09-12
JP2805653B2 (ja) 1998-09-30

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