JPH0635325A - Developing device for electrophotographic printer - Google Patents
Developing device for electrophotographic printerInfo
- Publication number
- JPH0635325A JPH0635325A JP4193530A JP19353092A JPH0635325A JP H0635325 A JPH0635325 A JP H0635325A JP 4193530 A JP4193530 A JP 4193530A JP 19353092 A JP19353092 A JP 19353092A JP H0635325 A JPH0635325 A JP H0635325A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- magnetic
- magnetic toner
- electrostatic latent
- latent image
- 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- Withdrawn
Links
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は電子写真式プリンタの現
像装置に関し、特に磁性トナーを帯状の磁気フィルムで
供給する電子写真式プリンタの現像装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developing device for an electrophotographic printer, and more particularly to a developing device for an electrophotographic printer which supplies magnetic toner with a strip-shaped magnetic film.
【0002】[0002]
【従来の技術】図2は従来の電子写真式プリンタの現像
装置の一例を示す断面図である。図2を参照すると、従
来の電子写真式プリンタの現像装置において、マグネッ
トロール12は磁界を発生させる。この磁界はマグネッ
トロール12の矢印D方向の回転と伴に矢印C方向に回
転する。磁性トナー16は金属製スリーブ11の表面に
吸着する。スリーブ11の表面に吸着した磁性トナー1
7はマグネットロール12が発生する磁界により拘束力
を受ている。ドクターブレード13先端とスリーブ11
表面との距離、すなわちドクターブレードギャップは所
定の値に設定されているので、磁性トナー17は均一な
薄層を形成する。像担持体14表面には図示省略の帯電
露光部により静電潜像が形成されていて、静電潜像と磁
性トナー17との静電引力が磁界による拘束力より大き
いので、磁性トナー17は静電潜像に付着してトナー像
18を形成する。磁性トナー16はミキサー15の矢印
E方向の回転によりスリーブ11方向に供給されるので
トナータンク19に磁性トナー16が有る限り上述の動
作が繰返される。2. Description of the Related Art FIG. 2 is a sectional view showing an example of a developing device of a conventional electrophotographic printer. Referring to FIG. 2, in the developing device of the conventional electrophotographic printer, the magnet roll 12 generates a magnetic field. This magnetic field rotates in the direction of arrow C as the magnet roll 12 rotates in the direction of arrow D. The magnetic toner 16 sticks to the surface of the metal sleeve 11. Magnetic toner 1 adsorbed on the surface of the sleeve 11
The magnetic field 7 generated by the magnet roll 12 receives a restraining force. Doctor blade 13 tip and sleeve 11
Since the distance to the surface, that is, the doctor blade gap is set to a predetermined value, the magnetic toner 17 forms a uniform thin layer. An electrostatic latent image is formed on the surface of the image carrier 14 by a charging exposure unit (not shown), and the electrostatic attraction between the electrostatic latent image and the magnetic toner 17 is larger than the binding force of the magnetic field. A toner image 18 is formed by adhering to the electrostatic latent image. Since the magnetic toner 16 is supplied in the direction of the sleeve 11 by the rotation of the mixer 15 in the direction of arrow E, the above operation is repeated as long as the magnetic toner 16 remains in the toner tank 19.
【0003】[0003]
【発明が解決しようとする課題】この従来の電子写真式
プリンタの現像装置は、金属製スリーブおよびマグネッ
トロールが不可欠である。しかしながら、これら金属製
スリーブおよびマグネットロールは価格が高く、重量が
重いので、現像装置の軽量化および低価格化の妨げにな
る。さらに、マグネットロールの回転機構を必要とする
ので構造が複雑になる。A metal sleeve and a magnet roll are indispensable for the developing device of this conventional electrophotographic printer. However, since these metal sleeves and magnet rolls are expensive and heavy, they hinder the weight reduction and cost reduction of the developing device. Furthermore, the structure becomes complicated because a rotating mechanism of the magnet roll is required.
【0004】[0004]
【課題を解決するための手段】本発明の電子写真式プリ
ンタの現像装置は、磁性トナーで顕在化される静電潜像
を有する像担持体に前記磁性トナーを供給する帯状の磁
気フィルムから成るトナー担持体を備える。SUMMARY OF THE INVENTION A developing device for an electrophotographic printer according to the present invention comprises a strip-shaped magnetic film for supplying the magnetic toner to an image carrier having an electrostatic latent image visualized by the magnetic toner. A toner carrier is provided.
【0005】[0005]
【実施例】次に、本発明について図面を参照して説明す
る。図1は本発明の一実施例を示す断面図である。図1
を参照すると、この電子写真式プリンタの現像装置にお
いて、トナータンク9に貯蔵されている磁性トナー6は
磁気フィルム1表面に吸着される。このとき磁性トナー
7は磁気フィルム1の磁界により拘束力の受けている。
磁気フィルム1はローラ対2により引張力を受けながら
矢印A方向に回転する。ドクターブレード3先端と磁気
フィルム1表面との距離、すなわちドクターブレードギ
ャップは所定の値に設定されているので、磁性トナー7
は均一な薄層を形成する。像担持体4表面には図示省略
の帯電露光部により静電潜像が形成されていて、静電潜
像と磁性トナー7との静電引力が磁界による拘束力より
大きいので、磁性トナー7は静電潜像に付着してトナー
像8を形成する。磁性トナー6はミキサー5の矢印B方
向の回転によりドクターブレード3方向に供給されるの
でトナータンク9に磁性トナー6が有る限り上述の動作
が繰返される。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the present invention. Figure 1
Referring to, in the developing device of this electrophotographic printer, the magnetic toner 6 stored in the toner tank 9 is adsorbed on the surface of the magnetic film 1. At this time, the magnetic toner 7 is restrained by the magnetic field of the magnetic film 1.
The magnetic film 1 rotates in the direction of arrow A while receiving a tensile force by the roller pair 2. Since the distance between the tip of the doctor blade 3 and the surface of the magnetic film 1, that is, the doctor blade gap is set to a predetermined value, the magnetic toner 7
Form a uniform thin layer. An electrostatic latent image is formed on the surface of the image carrier 4 by a charging exposure unit (not shown), and the electrostatic attraction between the electrostatic latent image and the magnetic toner 7 is larger than the binding force due to the magnetic field. The toner image 8 is formed by adhering to the electrostatic latent image. Since the magnetic toner 6 is supplied in the direction of the doctor blade 3 by the rotation of the mixer 5 in the direction of the arrow B, the above operation is repeated as long as the magnetic toner 6 remains in the toner tank 9.
【0006】[0006]
【発明の効果】以上説明したように、本発明によれば、
帯電した磁性トナーで顕在化される静電潜像を有する像
担持体に磁性トナーを供給する帯状の磁気フィルムから
成るトナー担持体を備えることにより、現像装置の構造
が簡単になるので、現像装置の軽量化および低価格化が
できる。As described above, according to the present invention,
Since the structure of the developing device is simplified by providing the toner carrier composed of the band-shaped magnetic film for supplying the magnetic toner to the image carrier having the electrostatic latent image visualized with the charged magnetic toner, the developing device is simplified. Can be made lighter and less expensive.
【図1】本発明の一実施例の構成を示す断面図である。FIG. 1 is a sectional view showing a configuration of an embodiment of the present invention.
【図2】従来例の構成を示す断面図である。FIG. 2 is a cross-sectional view showing a configuration of a conventional example.
1 磁気フィルム 2 ローラ対 3 ドクターブレード 4 像担持体 5 ミキサー 6,7 磁性トナー 8 トナー像 9 トナータンク 1 magnetic film 2 roller pair 3 doctor blade 4 image carrier 5 mixer 6,7 magnetic toner 8 toner image 9 toner tank
Claims (1)
する像担持体に前記磁性トナーを供給する帯状の磁気フ
ィルムから成るトナー担持体を備えることを特徴とする
電子写真式プリンタの現像装置。1. A developing device for an electrophotographic printer, comprising: a toner carrier made of a strip-shaped magnetic film for supplying the magnetic toner to an image carrier having an electrostatic latent image visualized with the magnetic toner. apparatus.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4193530A JPH0635325A (en) | 1992-07-21 | 1992-07-21 | Developing device for electrophotographic printer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4193530A JPH0635325A (en) | 1992-07-21 | 1992-07-21 | Developing device for electrophotographic printer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0635325A true JPH0635325A (en) | 1994-02-10 |
Family
ID=16309609
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4193530A Withdrawn JPH0635325A (en) | 1992-07-21 | 1992-07-21 | Developing device for electrophotographic printer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0635325A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09100162A (en) * | 1996-05-13 | 1997-04-15 | Toyo Tanso Kk | Production of highly purified graphite material and apparatus therefor |
EP0889379A1 (en) * | 1997-06-30 | 1999-01-07 | Xerox Corporation | Apparatus and method for non-interactive agitated magnetic brush development |
US6102841A (en) * | 1997-06-30 | 2000-08-15 | Xerox Corporation | Magnetic sleeve for non-interactive agitated magnetic brush development |
EP1522523A1 (en) | 2003-10-10 | 2005-04-13 | Toyo Tanso Co., Ltd. | High purity carbonaceous material |
-
1992
- 1992-07-21 JP JP4193530A patent/JPH0635325A/en not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09100162A (en) * | 1996-05-13 | 1997-04-15 | Toyo Tanso Kk | Production of highly purified graphite material and apparatus therefor |
EP0889379A1 (en) * | 1997-06-30 | 1999-01-07 | Xerox Corporation | Apparatus and method for non-interactive agitated magnetic brush development |
US6102841A (en) * | 1997-06-30 | 2000-08-15 | Xerox Corporation | Magnetic sleeve for non-interactive agitated magnetic brush development |
EP1522523A1 (en) | 2003-10-10 | 2005-04-13 | Toyo Tanso Co., Ltd. | High purity carbonaceous material |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19991005 |