KR0185261B1 - Method for manufacturing ferrite carrier - Google Patents
Method for manufacturing ferrite carrier Download PDFInfo
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- KR0185261B1 KR0185261B1 KR1019950030010A KR19950030010A KR0185261B1 KR 0185261 B1 KR0185261 B1 KR 0185261B1 KR 1019950030010 A KR1019950030010 A KR 1019950030010A KR 19950030010 A KR19950030010 A KR 19950030010A KR 0185261 B1 KR0185261 B1 KR 0185261B1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
- H01F1/342—Oxides
- H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/20—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/22—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
- H01F1/36—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
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Abstract
본 발명은 페라이트 캐리어(Ferrtie Carrier)의 제조방법 및 그 제품에 관한 것으로, 특히 마그네슘-구리-아연 페라이트 계열의 재료를 페라이트 코어 표면에 균일한 코우팅(Cooting)막을 형성하여 캐리어 표면을 양호하게 한 코아 표면에 코우팅막을 갖는 페라이트 캐리어의 제조방법 및 그 제품에 관한 것인바, 종래의 자기 브러시 방법에 사용되는 현상제는 캐리어의 재질로서, 자장에 의하여 그 방향에 강하게 자화하는 물질되어 있어 감광체상의 정전하 상이 전하와 접속했을때 정전하가 누전되는 현상과, 상기 누전되는 현상에 의해 자성체 입자의 표면에 절연성 수지 피복층을 형성되고, 이러한 절연성 캐리어를 사용하면 캐리어 입자의 표면에 토너 입자가 드럼에 부착되어 복사 지면이 오염되며, 캐리어와 토너의 마찰 대전 특성이 다르므로 인하여 기기의 내구성이 저하되며 사용 수명이 짧아지고, 고속 전자 복사시에도 상기와 같은 문제점으로 인하여 고속 복사가 되지 않는 제반 문제점을 내포하고 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a ferrite carrier (Ferrtie Carrier), and a product thereof. In particular, a magnesium-copper-zinc ferrite-based material is formed on the surface of a ferrite core to form a uniform coating film to improve the carrier surface. The present invention relates to a method for manufacturing a ferrite carrier having a coating film on a core surface thereof and a product thereof. The developer used in the conventional magnetic brush method is a material of a carrier, which is a material which strongly magnetizes in a direction by a magnetic field, When the electrostatic charge phase is connected with electric charges, an electrostatic charge is short-circuited, and the short-circuiting phenomenon forms an insulating resin coating layer on the surface of the magnetic particles. When the insulating carrier is used, toner particles are formed on the surface of the carrier particles. Attached to contaminate the copying surface, and because the frictional charging characteristics of the carrier and toner are different, Its durability is reduced, its service life is shortened, and there are various problems in that high-speed copying is not possible due to the above problems even at high-speed electronic copying.
본 발명은 상기와 같은 종래 기술이 갖는 제반 문제점을 감안하여, 이를 해소하고자 안출된 것으로서, 마그네슘-구리-아연 페라이트 계열의 재료로 캐리어 입자간의 상호 작용에 의해 코우팅막의 박리 혹은 파손 현상이 발생하지 않게 하기 위해 캐리어의 입자가 구형이며, 그 표면의 평활성을 양호하게 한 코아를 제공하는데 그 특징이 있다.The present invention has been made in view of the above-described problems of the prior art, and has been devised to solve the problem. The coating or peeling of the coating film does not occur due to the interaction between carrier particles with a magnesium-copper-zinc ferrite-based material. The particles of the carrier are spherical so as not to provide a feature of providing a core having a good smoothness of the surface thereof.
Description
제1도는 종래에 코우팅 되지 않은 구형 페라이트 코아.1 is a spherical ferrite core not conventionally coated.
제2도는 본 발명의 코우팅된 페라이트 캐리어.2 is a coated ferrite carrier of the present invention.
본 발명은 페라이트 캐리어(Ferrite Carrier)의 제조방법 및 그 제품에 관한 것으로, 특히 마그네슘-구리-아연 페라이트 계열의 재료를 페라이트 코어 표면에 균일한 코우팅(Cooting)막을 형성하여 캐리어 표면을 양호하게 한 코아 표면에 코우팅막을 갖는 페라이트 캐리어의 제조방법 및 그 제품에 관한 것이다.BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing a ferrite carrier and a product thereof. In particular, a magnesium-copper-zinc ferrite-based material is formed on the surface of a ferrite core to form a uniform coating film to improve the carrier surface. A method for producing a ferrite carrier having a coating film on the core surface and a product thereof.
일반적으로 자성 캐리어는 복사기에서 자기 브러시(Brush) 현상에 사용되는 건식 현상제로써, 특히 토너(Toner)와 일정 비율로 혼합되어 사용된다.In general, the magnetic carrier is a dry developer used for developing a magnetic brush in a copier, and in particular, is mixed with a toner in a predetermined ratio.
상기 자성 캐리어는 감광체가 좌·우 이동하는 동안 원고의 문자를 빛으로 검출하여 드럼에 인식하여 토너를 이송시키며, 토너에 전하를 부여시켜 드럼에 토너가 부착되고 불필요한 토너 부분을 제거하는 기능을 갖고 있다.The magnetic carrier has a function of detecting the characters of the document with light while the photoreceptor is moved left and right, recognizing them on the drum, transferring the toner, and applying a charge to the toner to attach the toner to the drum and removing unnecessary toner parts. have.
상기와 같은 종래의 자기 브러시 방법에 사용되는 현상제는 캐리어의 재질로서, 자장에 의하여 그 방향에 강하게 자화하는 물질 예를들면, 페라이트, 마그네트를 비롯해서 철, 코발트, 니켈등의 강자성을 나타내는 원소를 포함한 합금 혹은 화합물, 또는 강자성 원소를 함유하고 있지 않으나, 적당히 열처리 함으로써, 자성을 나타내게 되는 합금 또는 2산화크롬 등이 있다.The developer used in the above-described conventional magnetic brush method is a material of a carrier, and a material that magnetizes strongly in its direction by a magnetic field, for example, ferrite, magnets, and other elements showing ferromagnetic properties such as iron, cobalt, and nickel. Although there are no alloys or compounds included or ferromagnetic elements, there are alloys or chromium dioxides that exhibit magnetic properties by appropriate heat treatment.
이와 같은 캐리어는 강자성을 가지고 있어 자기 브러시 현상에 의해 자기적으로 반송되므로, 현상제의 반송 매체로서의 기능 혹은 적절한 토너와 마찰 대전시키므로서 토너에 전하를 부여하는 기능을 가진다.Since such a carrier is ferromagnetic and magnetically conveyed by magnetic brush development, such a carrier has a function as a conveying medium of a developer or a function of imparting electric charge to a toner by frictional charging with an appropriate toner.
한편, 캐리어의 저항값이 매우 낮은 경우 감광체상의 정전하상이 전하와 접속했을때 정전하가 누전되므로, 사용자가 원하는 농도로 카피되지 않아 복사 농도를 재조정하여 카피하는 문제점과, 또한, 상기 누전되는 현상에 의해 자성체 입자의 표면에 절연성 수지 피복층을 형성하여 이루어지는 캐리어가 제안되어 실용화되고, 이러한 절연성 캐리어를 사용하면 캐리어 입자의 표면에 토너 입자가 드럼에 부착되어 복사 지면이 오염되며, 캐리어와 토너의 마찰 대전 특성이 다르므로 인하여, 복사기의 기종에 따른 피복수지가 다양한 복사 용지를 별도로 제작하여야 하는 등의 문제 즉 복사기의 특성에 따라 건식 복사 용지가 제한되어져 왔다.On the other hand, when the resistance value of the carrier is very low, the electrostatic charge is leaked when the electrostatic charge on the photoconductor is connected with the electric charge, so that the user is not copied to the desired concentration, and the radiation density is adjusted and copied. The carrier formed by forming an insulating resin coating layer on the surface of the magnetic particles is proposed and put into practical use. When the insulating carrier is used, toner particles adhere to the drum on the surface of the carrier particles, contaminating the copying surface, and friction between the carrier and toner Due to the different charging characteristics, dry copy papers have been limited according to the problem of having to separately produce a copy paper having various coated resins according to the type of copying machine.
이러한 문제점으로 인하여 기기의 내구성이 저하되며 사용 수명이 짧아지고, 고속 전자 복사시에도 상기와 같은 문제점으로 인하여 고속 복사가 되지 않는 제반 문제점을 내포하고 있다.Due to these problems, the durability of the device is reduced, the service life is shortened, and even when high-speed electronic copying, there are various problems in that high-speed copying is not possible due to the above problems.
본 발명은 상기와 같은 종래 기술이 갖는 제반 문제점을 감안하여, 이를 해소하고자 창출된 것으로서, 마그네슘-구리-아연 페라이트 계열의 재료로 캐리어 입자간의 상호 작용에 의해 코우팅막의 박리 혹은 파손 현상이 발생하지 않게 하기 위해 캐리어의 입자가 구 형이며, 그 표면의 평활성(캐리어 표면의 매끄러운 정도)을 양호하게 한 코아를 제공하는데 그 주목적이 있고, 또한 코아 표면에 균일한 코우팅막을 갖으며, 코우팅재가 소량으로도 만족할 만한 화상 특성의 안정화와 입자 상호간의 접촉등이 발생하더라도 균일 코우팅에 의해 코우팅막의 박리 혹은 파손 현상을 배제시키는 페라이트 캐리어재를 갖도록 한 것에 다른 목적이 있다.The present invention was made in view of the above-mentioned problems of the prior art, and was created to solve the above problem, and the peeling or breakage of the coating film does not occur due to the interaction between carrier particles with a magnesium-copper-zinc ferrite-based material. In order to prevent the particles of the carrier from being spherical, the main object is to provide a core having a good smoothness of the surface (smoothness of the carrier surface), and also has a uniform coating film on the core surface. Another object of the present invention is to provide a ferrite carrier material that eliminates peeling or breakage of the coating film by uniform coating even if a small amount of satisfactory image characteristics are stabilized and contact between the particles occurs.
상기와 같은 목적을 구현하고자 이루어지는 실시예를 첨부된 도면을 참조하여 살펴 보면 다음과 같다.An embodiment made to implement the above object will be described with reference to the accompanying drawings.
제2도에 도시된 바와 같이 페라이트 캐리어 입자의 표면을 평활하게 하기 위해 마그네슘-구리-아연 페라이트 분말에 첨가물로 산화 비스무스(Bi2O3)를 0~1 w/o 정도를 첨가하고, 스프레이 드라이어로 구형화 한 후 소결하여 구형 페라이트 입자를 제조하며, 산화 비스무스(Bi2O3) 첨가량에 따라 입자의 그레인 크기는 증가하며, 상기 페라이트 코아재에 스티렌 계열의 수지로 코우팅하는 페라이트 캐리어를 제조하였다.As shown in FIG. 2, bismuth oxide (Bi 2 O 3 ) is added as an additive to the magnesium-copper-zinc ferrite powder in order to smooth the surface of the ferrite carrier particles, and a spray dryer Spherical ferrite particles are prepared by sintering to form spherical ferrite particles, and the grain size of the particles increases according to the amount of bismuth oxide (Bi 2 O 3 ) added. It was.
이하, 본 발명에 대한 구체적인 실시예를 살펴 보면,Hereinafter, looking at a specific embodiment of the present invention,
-실시예 Ⅰ은 산화철 : 47~49 m/o, 산화 마그네슘 : 26~28 m/o, 산화 구리 4~6 m/o, 산화 아연 : 19~21 m/o인 배합 비율이 조정을 되도록 분체를 혼합한다. 이때 혼합된 분말을 800~1100℃에서 가소시켜, 상기 가소된 분말에 산화 비스무스를 0~1 w/o 첨가한 후, Attritor를 사용해서 분쇄 입경을 2㎛로 제조하되, 제조된 용액에 바인더를 가하여 분무 건조법에 의해서 구상 펠레트를 제조하고, 상기 펠레트를 1000~1300℃에서 소결하고, 분급한 후, 100~240 mesh의 페라이트 캐리어용 코아재를 얻는다.Example 1 is powder so that the mixing ratio of iron oxide: 47-49 m / o, magnesium oxide: 26-28 m / o, copper oxide 4-6 m / o, zinc oxide: 19-21 m / o is adjusted. Mix it. At this time, the mixed powder was calcined at 800 to 1100 ° C., and bismuth oxide was added to the calcined powder 0 to 1 w / o, and then, the Attritor was used to prepare a pulverized particle diameter of 2 μm. After the addition, spherical pellets are prepared by the spray drying method, the pellets are sintered at 1000 to 1300 ° C, and classified, and a core material for ferrite carriers of 100 to 240 mesh is obtained.
이때 얻어진 구상의 페라이트 코아재의 포화자화는 40~60emu/g이다.The saturation magnetization of the spherical ferrite core material obtained at this time is 40-60 emu / g.
-실시예 Ⅱ는 실시예 Ⅰ에서 얻은 페라이트 코아재에 스티렌 부틸 아크릴레이트(Mw=75,000, Mn=9,000)의 메틸, 에틸, 케톤 용액(수지 2.4%)를 스프레이 코우팅하여 수지 코우팅 캐리어를 얻는다.Example II was spray coated with a styrene butyl acrylate (Mw = 75,000, Mn = 9,000) methyl, ethyl, ketone solution (resin 2.4%) to the ferrite core material obtained in Example I to obtain a resin coating carrier. .
상기와 같은 기술 구성에 대한 작용 효과를 살펴 보면 다음과 같다.Looking at the effect on the technical configuration as described above are as follows.
즉, 정전 복사용 페라이트 캐리어재를 구성하는 입자중의 결정 입자를 성장시킴으로써, 표면의 평활성을 양호하게 하고, 코우팅 두께를 균일화 할 수 있으며, 또한 코우팅재가 소량으로도 만족할 만한 화상 특성의 안정화와 입자 상호간의 기계적 충전식 접촉등이 발생하더라도 균일 코우팅에 의해 코우팅 막의 박리 혹은 파손 현상이 거의 발생하지 않는다.That is, by growing the crystal grains in the particles constituting the electrostatic radiation ferrite carrier material, the surface smoothness can be improved, the coating thickness can be made uniform, and the coating material can be stabilized with a small amount. Even when mechanically charged contact between the particles and the particles occurs, the coating layer is hardly peeled or broken due to uniform coating.
또한, 복사지면의 오염 혹은 파손 현상이 거의 발생하지 아니하므로써, 복사지면의 오염 혹은 감광체 자체의 소모를 하지 아니하고, 현상재로서의 내습 특성까지도 안정화시키는 것과, 상기와 같은 수지 코우팅된 캐리어를 시판 자기 브러시 현상용 토너(제록스사 제품 3800용 토너)와 교반 혼합하여 현상제를 제조한 후, 분체 대전량 측정기를 이용하여 분체 대전량을 측정하였을때 대전량은 12.95μc/g이었다.In addition, since the contamination or damage of the radiation surface hardly occurs, the contamination of the radiation surface or the consumption of the photoconductor itself is not stabilized, and even the moisture resistance characteristic of the developer is stabilized, and the resin-coated carrier as described above is commercially available. After preparing a developer by stirring and mixing with a brush developing toner (3800 toner manufactured by Xerox), the charge amount was 12.95 µc / g when the powder charge amount was measured using a powder charge meter.
상기 현상제를 이용하여 유기 감광체상의 정전잠상을 현상한 결과 자비산과 B.G.D는 양호하게 나타났으며, 전사 효율은 85.37%로 비교적 우수하며, 또한 솔리드 농도는 1.335로 우수하고 기내 비산은 대체적으로 양호하게 나타내는 여러가지 효과를 갖는다.As a result of developing the electrostatic latent image on the organic photoconductor using the developer, it was found that the arsenic acid and the BGD were good, the transfer efficiency was relatively good at 85.37%, and the solid concentration was 1.335, and the in-flight scattering was generally good. It has various effects.
이상에서 살펴 본 바와 같이 철, 니켈, 코발트와 같은 강자성체에 의해 캐리어 저항값의 저하로 인한 문제점을 해소하고, 자성체 입자의 표면에 절연성 수지 피복층을 형성하여 캐리어 입자의 표면에 토너 입자가 부착되어 복사지면이 오염되는 것을 방지하며, 캐리어와 토너의 마찰 대전 특성을 피복수지의 종류 등에 의해서 제어가 가능하게 할뿐만 아니라 코우팅에 의해 내구성이 뛰어나고 복사기의 사용 수명은 반영구적이며, 고속 전사 복사가 가능하게 된다.As described above, the ferromagnetic material such as iron, nickel, and cobalt eliminates the problems caused by the decrease of the carrier resistance value, forms an insulating resin coating layer on the surface of the magnetic particles, and attaches toner particles to the surface of the carrier particles, thereby radiating them. It prevents the ground from being contaminated and controls the frictional charging characteristics of the carrier and the toner by the type of the coated resin, etc., and it is durable by coating and the life of the copier is semi-permanent. do.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950030010A KR0185261B1 (en) | 1995-09-14 | 1995-09-14 | Method for manufacturing ferrite carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950030010A KR0185261B1 (en) | 1995-09-14 | 1995-09-14 | Method for manufacturing ferrite carrier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR970017714A KR970017714A (en) | 1997-04-30 |
| KR0185261B1 true KR0185261B1 (en) | 1999-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019950030010A Expired - Fee Related KR0185261B1 (en) | 1995-09-14 | 1995-09-14 | Method for manufacturing ferrite carrier |
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| Country | Link |
|---|---|
| KR (1) | KR0185261B1 (en) |
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- 1995-09-14 KR KR1019950030010A patent/KR0185261B1/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| KR970017714A (en) | 1997-04-30 |
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