JPS58166370A - Electrophotographic device - Google Patents
Electrophotographic deviceInfo
- Publication number
- JPS58166370A JPS58166370A JP4730982A JP4730982A JPS58166370A JP S58166370 A JPS58166370 A JP S58166370A JP 4730982 A JP4730982 A JP 4730982A JP 4730982 A JP4730982 A JP 4730982A JP S58166370 A JPS58166370 A JP S58166370A
- Authority
- JP
- Japan
- Prior art keywords
- transfer
- permanent magnet
- photosensitive drum
- paper
- transfer paper
- 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.)
- Pending
Links
- 238000012546 transfer Methods 0.000 claims abstract description 45
- 229920001971 elastomer Polymers 0.000 claims abstract description 30
- 108091008695 photoreceptors Proteins 0.000 abstract 1
- 230000005415 magnetization Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000013518 transcription Methods 0.000 description 1
- 230000035897 transcription Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
- G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は複写機及びプリンタ等として利用される電子写
真装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrophotographic apparatus used as a copying machine, a printer, and the like.
第１図は従来の代表的な電子写真装置の構成を示す側面
図で、図において１は感光ドラムであり、この感光ドラ
ム１の周囲には一次帯電器２、照射光学系３、現像器４
、転写ローラ５、搬送ベルト６、除電及びクリーナ７が
各々所定の位置に配置されている。８は転写紙、９は定
着器である。FIG. 1 is a side view showing the configuration of a typical conventional electrophotographic apparatus. In the figure, 1 is a photosensitive drum, and around the photosensitive drum 1 are a primary charger 2, an irradiation optical system 3, a developer 4,
, a transfer roller 5, a conveyor belt 6, and a static eliminator/cleaner 7 are arranged at predetermined positions. 8 is a transfer paper, and 9 is a fixing device.
次に、この構成における転写プロセスを説明すると、−
次帯電器２により感光ドラム１の周囲を一様に帯電し、
照射光学系３の光照射により感光ドラム１に静電潜像を
形成した後、現像器４で現像処理して静電潜像上に磁性
トナーを吸着させる。Next, to explain the transcription process in this configuration, −
Next, the area around the photosensitive drum 1 is uniformly charged by the charger 2,
After an electrostatic latent image is formed on the photosensitive drum 1 by light irradiation from the irradiation optical system 3, development is performed by a developing device 4 to cause magnetic toner to be attracted onto the electrostatic latent image.
転写ローラ５は導電ゴムで被覆したローラであシ、転写
電圧ＶＢが与えられる。これによシ前記磁性トナーは静
電気による吸引力を受け、感光ドラム１と転写ローラ５
との間に送込まれた転写紙８に転写される。そして転写
後、転写紙８は搬送ベルト６によシ定着器９へ送られ、
定着後出力される。The transfer roller 5 is a roller coated with conductive rubber, and is applied with a transfer voltage VB. As a result, the magnetic toner is attracted to the photosensitive drum 1 and the transfer roller 5 by electrostatic attraction.
The image is transferred onto the transfer paper 8 that is fed in between. After the transfer, the transfer paper 8 is sent to the fixing device 9 by the conveyor belt 6,
It is output after fixing.
一方、感光ドラム１は除電及びクリーナＴによシ除電及
びクリーニングされ、こうしてプロセスが終了する。On the other hand, the photosensitive drum 1 is neutralized and cleaned by the cleaner T, and the process is thus completed.
ところで上述した装置において、近年では１成分トナー
と呼ばれる磁性トナーが使用されておシ、この磁性トナ
ーは樹脂と磁性粉を主材料とし、磁性トナーのみで磁気
ブラシを形成できるので、従来の２成分トナーのような
キャリアを必要としない利点がある。By the way, in recent years, magnetic toner called one-component toner has been used in the above-mentioned apparatus. This magnetic toner is mainly made of resin and magnetic powder, and a magnetic brush can be formed only with magnetic toner, so it is not possible to use the conventional two-component toner. It has the advantage of not requiring a carrier such as toner.
しかしながら、この磁性トナーは帯電電荷が少なく、か
つ比重が大きいので、転写ローラ５により転写紙８を介
して転写電圧ＶＢを付与しても充分な転写率を得ること
ができず、また転写電圧ＶＢを上げることは転写紙８の
絶縁性が悪いことによる放電が発生するので限界があり
、従ってこれらのことにより従来の電子写真装置は磁性
トナーの転写効率が極めて悪いという欠点があった。However, since this magnetic toner has a small charge and a high specific gravity, it is not possible to obtain a sufficient transfer rate even if the transfer voltage VB is applied by the transfer roller 5 through the transfer paper 8, and the transfer voltage VB There is a limit to increasing the transfer paper 8 because discharge occurs due to poor insulation properties of the transfer paper 8. Therefore, due to these factors, conventional electrophotographic apparatuses have had the disadvantage that the transfer efficiency of magnetic toner is extremely poor.
本発明はこのような欠点を解決することを目的とし、そ
のため、複数のローラに巻掛けた無端ベルト状のゴム永
久磁石を用い、その磁気吸引力を利用して感光ドラム上
の磁性トナーを転写紙に転写させると共に、このゴム永
久磁石を回転走行させて転写紙を定着器へ搬送するよう
にしたことを特徴とする。The present invention aims to solve these drawbacks, and therefore uses an endless belt-shaped rubber permanent magnet wrapped around a plurality of rollers, and uses its magnetic attraction to transfer magnetic toner on a photosensitive drum. The present invention is characterized in that the transfer paper is transferred to the paper and the rubber permanent magnet is rotated to transport the transfer paper to the fixing device.
以下図面により説明すると、第２図は本発明の一実施例
を示す側面図で、図において１は感光ドラム、２は一次
帯電器、３は照射光学系、４は現像器、Ｔは除電及びク
リーナ、８は転写紙、９は定着器であシ、これらは第１
図のものと同一である０
１０は磁性トナーで、現像器４にょシ現像を行うことに
よって感光ドラム１上に静電気力で吸着されている０
１１は無端ベルト状に形成されたゴム、永久磁石で、回
転可能なローラ１２ａｔ１２ｂに巻掛けられて支持され
ており、ロー２１２ａ側の部分が小さな間隙を介して感
光ドラム１と対向するように配置されている。このゴム
永久磁石１１はゴム材に磁性材を混入したもので、例え
ば磁性材としてバリウムフェライトを使用したものが市
販されている。To explain the following with reference to the drawings, FIG. 2 is a side view showing one embodiment of the present invention, in which 1 is a photosensitive drum, 2 is a primary charger, 3 is an irradiation optical system, 4 is a developing device, and T is a static eliminator. 8 is the transfer paper, 9 is the fuser, these are the first
0 and 10, which are the same as those in the figure, are magnetic toners, which are attracted onto the photosensitive drum 1 by electrostatic force after being developed in the developing device 4.0 and 11 are rubber formed in the shape of an endless belt, and permanent magnets. The roller 12at12b is wound around and supported by a rotatable roller 12at12b, and a portion on the row 212a side is arranged to face the photosensitive drum 1 with a small gap therebetween. This rubber permanent magnet 11 is made by mixing a magnetic material into a rubber material, and for example, one using barium ferrite as the magnetic material is commercially available.
なお、ローラ１２ａ＠１２ｂの一方は図示しないモータ
等に連結されており、無端ベルト状のゴム永久磁石１１
を感光ドラム１０周辺速度と同方向に同速度で回転走行
できるようになっている。Note that one of the rollers 12a@12b is connected to a motor (not shown), etc., and an endless belt-shaped rubber permanent magnet 11
can be rotated in the same direction and at the same speed as the peripheral speed of the photosensitive drum 10.
この構成において転写紙８は、感光ドラム１とゴム永久
磁石１１とＣ間例小塔な間隙に送込まれ、転写紙８を介
してゴム永久磁石１１が感光ドラム１に当接した状態で
感光ドラム１上の磁性トナー１０はゴム永久磁石１１の
磁気吸引力により転写紙８に順次転写される０このとき
、ゴム永久磁石１１はローラ１２ａ、１２ｂにより感光
ドラム１と同速度で回転走行しているため、磁性トナー
１０は転写後も転写紙８の厚さ方向に吸引され、この状
態で転写紙８が定着器９へ搬送される。従って転写後に
画像の乱れが生じることはない。In this configuration, the transfer paper 8 is fed into a small gap between the photosensitive drum 1 and the rubber permanent magnet 11, and the rubber permanent magnet 11 is in contact with the photosensitive drum 1 via the transfer paper 8, and then the photosensitive drum 1 is exposed. The magnetic toner 10 on the drum 1 is sequentially transferred onto the transfer paper 8 by the magnetic attraction force of the rubber permanent magnet 11.At this time, the rubber permanent magnet 11 is rotated and run at the same speed as the photosensitive drum 1 by rollers 12a and 12b. Therefore, the magnetic toner 10 is attracted in the thickness direction of the transfer paper 8 even after transfer, and the transfer paper 8 is conveyed to the fixing device 9 in this state. Therefore, no image disturbance occurs after transfer.
なお、ゴム永久磁石１１のゴム材として、例えばニトル
ゴム等の導電性ゴムを使用し、これに転写電圧ＶＢを図
示したようにローラ１２ａを介して付与すれば、静電気
による吸引力を吸気吸引力と同時に利用して感光ドラム
１上の磁性トナー１０を転写紙８に転写させることがで
きる。Note that if a conductive rubber such as nitrile rubber is used as the rubber material of the rubber permanent magnet 11 and a transfer voltage VB is applied to it via the roller 12a as shown in the figure, the attraction force due to static electricity can be converted into an intake attraction force. At the same time, the magnetic toner 10 on the photosensitive drum 1 can be transferred onto the transfer paper 8.
第３図は本発明におけるゴム永久磁石１１の着磁例を示
す説明図で、ゴム永久磁石１１の両面が各々同様となる
ように、例えば図示したように表面すべてがＮ極、裏面
すべてがＳ極となるように厚さ方向に着磁する０
このような着磁を行えば、磁性トナー１０に対する磁気
吸引力は磁束密度の勾配に比例するので、ゴム永久磁石
１１の曲率が大きい程、磁気吸引力は犬となる。FIG. 3 is an explanatory diagram showing an example of magnetization of the rubber permanent magnet 11 according to the present invention. For example, as shown in the figure, all the front surfaces are N poles, and all the back surfaces are S poles, so that both sides of the rubber permanent magnet 11 are the same. Magnetize in the thickness direction so as to form a pole.0 If such magnetization is performed, the magnetic attraction force to the magnetic toner 10 is proportional to the gradient of magnetic flux density, so the larger the curvature of the rubber permanent magnet 11, the more magnetic it becomes. Attraction becomes a dog.
従って、ローラ１２ａの位置の転写部では磁気吸引力が
大となり、ローラ１２ａ、１２ｂ間の搬送部では磁気吸
引力は小となるが、実用的には搬送部の磁気吸引力が小
でも画像の乱れは起らない。Therefore, the magnetic attraction force is large in the transfer section at the position of the roller 12a, and the magnetic attraction force is small in the conveyance section between the rollers 12a and 12b.However, in practice, even if the magnetic attraction force of the conveyance section is small, the image No disturbance occurs.
以上説明したように本発明は、無端ベルト状のゴム永久
磁石を用い、その磁気吸引力で感光ドラム上の磁性トナ
ーを転写紙に転写させるようにしているため、高い効率
で転写を行うことができると共に、ゴム永久磁石で直接
搬送を行うため、搬送中も磁気吸引力が働くことになり
、従って転写後のトナー画像が乱れることもないという
効果が得られる。As explained above, the present invention uses an endless belt-shaped rubber permanent magnet and uses its magnetic attraction to transfer the magnetic toner on the photosensitive drum to the transfer paper, so that transfer can be performed with high efficiency. In addition, since the toner is directly conveyed using a rubber permanent magnet, a magnetic attraction force is exerted even during conveyance, so that the toner image after transfer is not disturbed.
また、本発明は無端ベルト状のゴム永久磁石が転写部と
搬送部の二つの働きをするので、従来に比べて部品点数
を削減することができ、装置の小型化にも有利である等
の利点がある。In addition, since the endless belt-shaped rubber permanent magnet of the present invention functions as both the transfer section and the conveyance section, the number of parts can be reduced compared to the conventional method, which is advantageous for downsizing the device. There are advantages.
第１図は従来例を示す側面図、第２図は本発明の一実施
例を示す側面図、第３図は本発明におけるゴム永久磁石
の着磁例な示す説明図である。
１・・・感光ドラム ２・・・−次帯電器 ４・・・現
像器８・・・転写紙 ９・・・定着器 １０−・・磁性
トナー１１・・・ゴム永久磁石 １２ａ、１２ｂ・・・
ローラ特許用 願人 沖電気工業株式会社
代理人 弁理士 金 倉 喬 二FIG. 1 is a side view showing a conventional example, FIG. 2 is a side view showing an embodiment of the present invention, and FIG. 3 is an explanatory view showing an example of magnetization of a rubber permanent magnet in the present invention. 1... Photosensitive drum 2... Secondary charger 4... Developing device 8... Transfer paper 9... Fixing device 10-... Magnetic toner 11... Rubber permanent magnet 12a, 12b...・
For roller patents, applicant: Oki Electric Industry Co., Ltd., patent attorney, Takashi Kanakura
Claims (1)
久磁石を感光ドラムに転写紙を介して当接するように配
置し、このゴム永久磁石の磁気吸引力により感光ドラム
上の磁性トナーを転写紙に転写させると共に、ゴム永久
磁石を回転走行させることによシ転写紙を定着器へ搬送
することを特徴とする電子写真装置０ ２、ゴム永久磁石を導電性として、このゴム永久磁石に
転写電圧を与えることを特徴とする特許請求の範囲第１
項記載の電子写真装置。[Claims] 1. An endless belt-shaped rubber permanent magnet wound around a plurality of rollers is arranged so as to be in contact with the photosensitive drum via a transfer paper, and the magnetic attraction force of the rubber permanent magnet causes the photosensitive drum to An electrophotographic apparatus 02 characterized in that the above magnetic toner is transferred to a transfer paper and the transfer paper is conveyed to a fixing device by rotating and traveling a rubber permanent magnet, the rubber permanent magnet is electrically conductive, Claim 1 characterized in that a transfer voltage is applied to this rubber permanent magnet.
The electrophotographic device described in Section 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4730982A JPS58166370A (en) | 1982-03-26 | 1982-03-26 | Electrophotographic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4730982A JPS58166370A (en) | 1982-03-26 | 1982-03-26 | Electrophotographic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58166370A true JPS58166370A (en) | 1983-10-01 |
Family
ID=12771689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4730982A Pending JPS58166370A (en) | 1982-03-26 | 1982-03-26 | Electrophotographic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58166370A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592832A (en) * | 2013-11-08 | 2014-02-19 | 珠海天威飞马打印耗材有限公司 | Imaging device and transferring method thereof |
-
1982
- 1982-03-26 JP JP4730982A patent/JPS58166370A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592832A (en) * | 2013-11-08 | 2014-02-19 | 珠海天威飞马打印耗材有限公司 | Imaging device and transferring method thereof |
| CN103592832B (en) * | 2013-11-08 | 2015-12-23 | 珠海天威飞马打印耗材有限公司 | Imaging device and printing transferring method thereof |
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