JPS5921401Y2 - magnetic brush developing device - Google Patents
magnetic brush developing deviceInfo
- Publication number
- JPS5921401Y2 JPS5921401Y2 JP1978053543U JP5354378U JPS5921401Y2 JP S5921401 Y2 JPS5921401 Y2 JP S5921401Y2 JP 1978053543 U JP1978053543 U JP 1978053543U JP 5354378 U JP5354378 U JP 5354378U JP S5921401 Y2 JPS5921401 Y2 JP S5921401Y2
- Authority
- JP
- Japan
- Prior art keywords
- developer
- developing
- roll
- developing roll
- magnetic brush
- 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.)
- Expired
Links
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
Description
【考案の詳細な説明】
本考案は電子複写機に於ける現像装置、さらに詳しくは
高速複写機に適した多本ロール現像装置に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a developing device for an electronic copying machine, and more particularly to a multi-roll developing device suitable for a high-speed copying machine.
電子複写機をより高速化し、しかも良い複写品質を維持
することは今日の複写機に於いて重要な課題であるが、
従来の高速複写機に対する磁気ブラシ現像機には大別し
て２つの種類がある。Increasing the speed of electronic copying machines while maintaining good copy quality is an important issue in today's copying machines.
There are roughly two types of magnetic brush developing machines for conventional high-speed copying machines.
１つは現像ロールとして４〜５本を用いて現像剤を一方
向に搬送して現像する多本現像ロールシステムであり、
他の１つは１本の磁気ロールを用いる一本現像ロールシ
ステムである。One is a multi-roll developing roll system that uses 4 to 5 developing rolls to convey developer in one direction for development.
The other is a single developer roll system that uses one magnetic roll.
多本現像ロールシステムは高い現像性能が得られること
により、使用トナー含有率が下げられ、又ロール回転数
の低下が可能となることにより、トナークラウド、現像
剤こぼれを減少させるだけでなく優れたコピー質と安定
性が得られる。The multi-roll development roll system achieves high development performance, lowers the toner content used, and lowers the roll rotation speed, which not only reduces toner clouds and developer spills, but also provides excellent results. Provides copy quality and stability.
しがし、このような多本ロールシステムは機械の製造コ
ストが高くなるばかりでなく、現像機のスペースや重量
の点で複写機設計に大きな問題となった。However, such a multi-roll system not only increases the cost of manufacturing the machine, but also poses a major problem in the design of the copier in terms of space and weight of the developing machine.
一方、高速機への一本ロールの適用の場合には、像濃度
の再現性を向上させる為に使用トナー含有率は高くなり
、しかも現像ロールの感材に対する周速比（スピード比
）が大となり、特に高速複写機ではこれによるトナー、
現像剤の飛散が問題となった。On the other hand, when a single roll is applied to a high-speed machine, the toner content used is high in order to improve the reproducibility of image density, and the peripheral speed ratio (speed ratio) of the developing roll to the photosensitive material is large. Especially in high-speed copying machines, this causes toner,
Scattering of developer became a problem.
高いスピード比はコピーの画質に対しても、また広面積
の端部の現像不良（低濃度）や線画の再現性に対しても
悪い影響を及ぼすものであった。A high speed ratio had a negative effect on the image quality of copies, as well as poor development (low density) at the edges of large areas and reproducibility of line drawings.
これらの問題を改良する為に２本のロールを用いる現像
方式もあるが、２本程度使用したのでは充分に満足な性
能が得られないという問題があった。In order to improve these problems, there is a developing system that uses two rolls, but there is a problem in that if only two rolls are used, sufficiently satisfactory performance cannot be obtained.
本考案者らは従来のシステムとは異る新しい現像システ
ムを導入することによって、数少いロール本数で低いト
ナー含有率と低いスピード比を可能とする、トナークラ
ウドの発生や現像剤こぼれを減少させ、高品質のコピー
を得ることのできる現像装置の開発を図った。By introducing a new development system that differs from traditional systems, the inventors reduced toner cloud formation and developer spillage, allowing for low toner content and low speed ratios with fewer rolls. The aim was to develop a developing device that could produce high-quality copies.
本考案は、現像剤を収容する溜め部分を有する現像容器
と、溜め部分の現像剤から離隔して且つ静電潜像保持表
面に対向して設けられた２本の隣接した磁気吸引力を有
する現像ロールと、溜め部分の現像剤を該現像ロールに
供給する手段と、該現像ロール間を現像剤が潜像保持表
面に向けて搬送されるように該現像ロールを互いに逆方
向に回転せしめる駆動機構を有する磁気ブラシ現像装置
に関するものである。The present invention includes a developer container having a reservoir portion for storing developer, and two adjacent magnetic attractions provided apart from the developer in the reservoir portion and facing the electrostatic latent image holding surface. a developing roll, a means for supplying the developer in the reservoir to the developing roll, and a drive for rotating the developing rolls in opposite directions so that the developer is conveyed between the developing rolls toward the latent image holding surface. The present invention relates to a magnetic brush developing device having a mechanism.
この磁気ブラシ現像装置では２本の現像ロール間を現像
剤が外側（現像開口側）に向けて搬送されるセンターフ
ィード現像システムを採用しており、２００ ｍｍ／ｓ
ｅｃ以上のプロセススピードを有する高速複写機に適し
ている。This magnetic brush developing device uses a center-feed developing system in which the developer is transported between two developing rolls toward the outside (developing opening side) at a speed of 200 mm/s.
Suitable for high-speed copying machines with process speeds higher than EC.
この２本の現像ロールに現像剤を安定供給することは重
要であり、本考案は特に簡略な手段で２本の現像ロール
のセンターから現像剤を両ロールに安定供給することの
できるセンターフィードタイプの磁気ブラシ現像装置を
提供するものである。It is important to stably supply developer to these two developing rolls, and the present invention is a center feed type that can stably supply developer from the center of the two developing rolls to both rolls using particularly simple means. The present invention provides a magnetic brush developing device.
従って本考案は、上下関係を有して配列された２本の磁
気ブラシ現像ロールの間から現像領域へ現像剤を搬送し
て現像を行うセンターフィード現像装置において、上位
置現像ロールの現像ロールの現像剤剥離位置に分流手段
６１を設けて上部現像ロールの現像終了後該ロールから
剥離した現像剤のみの一部を現像剤溜め部に直接戻らな
いように下部現像ロールに導くよう（ごし、前記分流手
段が現像ロールの軸中とほぼ等しい巾を有する傾斜板６
３と、この傾斜板に形成された現像ロールの軸に平行な
現像剤落下孔と、この落下孔と下位現像ロール上とを結
ぶ導通管６２とからなることを特徴とする磁気ブラシ現
像装置を提供するものである。Therefore, the present invention provides a center-feed developing device in which development is carried out by conveying developer from between two magnetic brush developing rolls arranged in a vertical relationship to a developing area. A flow dividing means 61 is provided at the developer peeling position so that after the development of the upper developing roll is completed, only a portion of the developer peeled off from the upper developing roll is guided to the lower developing roll so as not to return directly to the developer reservoir. an inclined plate 6 in which the flow dividing means has a width approximately equal to that in the axis of the developing roll;
3, a magnetic brush developing device comprising: a developer drop hole parallel to the axis of the developing roll formed in the inclined plate; and a conductive pipe 62 connecting the developer drop hole and the top of the lower developing roll. This is what we provide.
本考案の現像装置は添付図面（第１図）に基づいて説明
する。The developing device of the present invention will be explained based on the accompanying drawing (FIG. 1).
現像容器内の現像剤溜め部から離隔して、且つ現像開口
部に静電潜像保持ドラム表面とある間隙をもって、２本
の現像ロール１１．２１が間隔を置いて設けられている
。Two developing rolls 11, 21 are provided at a distance from the developer reservoir in the developing container and with a certain gap between the developing opening and the surface of the electrostatic latent image holding drum.
現像ロールを構成する磁石１２．２２は固定されており
、これを包むシリンダー１３．２３は駆動機構によって
互いに反対方向でしがちシリンダー表面に磁気吸引され
た現像剤が両シノンダー間を現像開口に向って流れるよ
うに回転させられる。The magnets 12.22 constituting the developing roll are fixed, and the cylinders 13.23 that enclose them are moved in opposite directions by a drive mechanism. The developer magnetically attracted to the cylinder surface is moved between the two cylinders toward the developing opening. It can be rotated in a flowing manner.
これ等現像ロールは現像容器内の底部又は奥部に溜まっ
た現像剤に直接接触せず、適量の現像剤を溜め部から一
方の現像ロールに供給する手段が具備されている。These developing rolls do not come into direct contact with the developer accumulated at the bottom or deep part of the developing container, and are equipped with means for supplying an appropriate amount of developer from the reservoir to one of the developing rolls.
例えば現像剤溜め部に一部埋没したパドルロール３１に
よって現像剤を下の位置にある大径の現像ロール１１に
供給すると、固定磁石１２の磁場によってＡ部で吸引し
シリンダーの回転とともに現像剤が反時計方向に搬送さ
れていく。For example, when the developer is supplied to the large-diameter developing roll 11 located below by the paddle roll 31 partially buried in the developer reservoir, the developer is attracted at part A by the magnetic field of the fixed magnet 12 and the developer is absorbed as the cylinder rotates. It is transported counterclockwise.
現像ロール１１により搬送された現像剤を、Ｂの位置に
て、２本の現像ロールに必要な現像剤量に規制する第１
の流量制御手段であるところのトリマー４１によって調
整する。A first control unit that regulates the amount of developer conveyed by the developing rolls 11 at position B to the amount of developer required for the two developing rolls.
It is adjusted by a trimmer 41 which is a flow rate control means.
更に現像ロール１１の回転に伴い現像剤を２本の現像ロ
ール間へ搬送し、Ｃ部において、現像剤の流れを２分割
する第２の流量制御手段であるところのトリマー５１に
よって各の現像ロールに付着する現像剤の量を制御する
。Further, as the developing roll 11 rotates, the developer is conveyed between the two developing rolls, and in the C section, the trimmer 51, which is a second flow rate control means that divides the flow of the developer into two, separates the developer from each developing roll. Control the amount of developer that adheres to the surface.
トリマー５１とシリンダー１３との間隙の大きさによっ
て下位置の現像ロール１１へ付着する現像剤量が決まり
、残りの現像剤は上位置の小径の現像ロール２１の磁石
２２で吸引されて時計方向に搬送されていく。The amount of developer that adheres to the developing roll 11 at the lower position is determined by the size of the gap between the trimmer 51 and the cylinder 13, and the remaining developer is attracted by the magnet 22 of the small diameter developing roll 21 at the upper position and moves clockwise. being transported.
それぞれの現像ロールの回転により、現像剤は現像領域
で潜像を顕像化した後、現像ロールから剥離し、剥離し
た現像剤のみの一部は溜め部分にもどる。As each developing roll rotates, the developer visualizes a latent image in the developing area and then peels off from the developing roll, and only a portion of the peeled developer returns to the reservoir.
上位置の現像ロールから剥離した現像剤の一部を溜め部
にもどし、残部を下位置の現像ロール上の第−流量制御
前の現像剤搬送路中にもどす分流手段６１が上位置現像
ロールの現像剤剥離位置に設けられている。A flow dividing means 61 returns part of the developer peeled off from the upper developing roll to the reservoir, and returns the remaining part to the developer transport path on the lower developing roll before the first flow rate control. It is provided at the developer peeling position.
該分流手段は現像ロールの軸中とほぼ等しい巾を有する
傾斜板６３と、その傾斜板に形成された現像ロールの軸
に平行な適当な大きさの現像剤落下孔と、その落下孔と
下位置現像ロール上とを結ぶ導通管６２から或っている
。The flow dividing means includes an inclined plate 63 having a width approximately equal to the width in the axis of the developing roll, a developer falling hole of an appropriate size parallel to the developing roll axis formed in the inclined plate, and a developer falling hole below the falling hole. There is a conduit pipe 62 connecting the position and the top of the developing roll.
傾斜板の表面及び導通管の内部は現像剤がその上又はそ
の中を通る間にクロスミキシングされるように構成され
ていると更によい。It is further advantageous if the surface of the inclined plate and the interior of the conduit tube are configured in such a way that the developer is cross-mixed while passing over or through it.
以上詳細に説明したように、本考案の磁気ブラシ現像装
置によれば、前記分流手段を設けることによって、パド
ルロールを増速せずに下位置の現像ロールへの現像剤供
給がトナークラウドを発生させることなく良好に行われ
るので、常に安定した現像剤の搬送が可能となり、品質
の良いコピーを得ることができる。As explained in detail above, according to the magnetic brush developing device of the present invention, by providing the flow dividing means, the developer can be supplied to the lower developing roll without increasing the speed of the paddle roll, causing a toner cloud. Since this is carried out well without causing any damage, stable conveyance of the developer is possible at all times, and high-quality copies can be obtained.
第１図は本考案に係る現像装置の一例を示す図である。
図中符号： １１．２１・・・・・・現像ロール、１２
．２２・・・・・・磁石、１３．２３・・・・・・シリ
ンター、３１・・・・・・パドルロール、４１．５１・
・・・・・トリマー、６１・・・・・・分流手段、６２
・・・・・・導通管、６３・・・・・・傾斜板。FIG. 1 is a diagram showing an example of a developing device according to the present invention. Code in the figure: 11.21...Developing roll, 12
．． 22...Magnet, 13.23...Cylinder, 31...Paddle roll, 41.51.
... Trimmer, 61 ... Diversion means, 62
...Conducting pipe, 63... Slanted plate.
Claims (1)
ルの間から現像領域へ現像剤を搬送して現像を行うセン
ターフィード現像装置において、上位置現像ロールの現
像剤剥離位置に分流手段６１を設けて上部現像ロールの
現像終了後該ロールから剥離した現像剤のみの一部を現
像剤溜め部に直接戻らないように下部現像ロールに導く
ようにし、前記分流手段が現像ロールの軸中とほぼ等し
い巾を有する傾斜板６３と、この傾斜板に形成された現
像ロールの軸に平行な現像剤落下孔と、この落下孔と下
位現像ロール上とを結ぶ導通管６２とからなることを特
徴とする磁気ブラシ現像装置。In a center-feed developing device that performs development by conveying developer from between two magnetic brush developing rolls arranged in a vertical relationship to a developing area, a flow dividing means 61 is provided at the developer separation position of the upper developing roll. is provided so that only a portion of the developer peeled off from the upper developing roll after completion of development is guided to the lower developing roll without directly returning to the developer reservoir, and the dividing means is arranged in the shaft of the developing roll. It is characterized by consisting of an inclined plate 63 having approximately the same width, a developer falling hole formed in this inclined plate parallel to the axis of the developing roll, and a conductive pipe 62 connecting this falling hole and the top of the lower developing roll. Magnetic brush developing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978053543U JPS5921401Y2 (en) | 1978-04-24 | 1978-04-24 | magnetic brush developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978053543U JPS5921401Y2 (en) | 1978-04-24 | 1978-04-24 | magnetic brush developing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54156528U JPS54156528U (en) | 1979-10-31 |
| JPS5921401Y2 true JPS5921401Y2 (en) | 1984-06-23 |
Family
ID=28946671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1978053543U Expired JPS5921401Y2 (en) | 1978-04-24 | 1978-04-24 | magnetic brush developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5921401Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5041551A (en) * | 1973-01-17 | 1975-04-16 | ||
| JPS5317741A (en) * | 1976-08-02 | 1978-02-18 | Ibm | Multiple brush type developing device |
-
1978
- 1978-04-24 JP JP1978053543U patent/JPS5921401Y2/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5041551A (en) * | 1973-01-17 | 1975-04-16 | ||
| JPS5317741A (en) * | 1976-08-02 | 1978-02-18 | Ibm | Multiple brush type developing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54156528U (en) | 1979-10-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4063533A (en) | Multiple brush developer applying apparatus with a toner diverter blade | |
| US4887130A (en) | Electrostatic latent image developing apparatus | |
| US3985099A (en) | Magnetic brush developing device | |
| JPS5921401Y2 (en) | magnetic brush developing device | |
| JPH06202484A (en) | Developing device for electrophotographic printer | |
| US3977361A (en) | Magnetic brush developing device | |
| JPS634223Y2 (en) | ||
| JPS5855377Y2 (en) | magnetic brush developing device | |
| JPH11305530A (en) | Developer replenishing device | |
| JPS5968763A (en) | Dry type developing device | |
| JP2684809B2 (en) | Developing device | |
| US4383498A (en) | Apparatus for applying magnetic toner to a magnetic transport roll | |
| JPS622313B2 (en) | ||
| JP2610535B2 (en) | Developing device | |
| JP4042085B2 (en) | Development device | |
| JPS6315882Y2 (en) | ||
| JPH0112272Y2 (en) | ||
| JPS58181072A (en) | Dry type developing device | |
| JPS58100869A (en) | Developing device | |
| JPS59114557A (en) | Device for stirring developer | |
| JPS6210426B2 (en) | ||
| JPS5953546B2 (en) | magnetic brush developing device | |
| JPH04240881A (en) | Developing roll in developing machine | |
| JPS595863Y2 (en) | Copy machine | |
| JPS5536801A (en) | Magnetic brush developing device |