JPS5967565A - Electrostatic latent image developing method - Google Patents
Electrostatic latent image developing methodInfo
- Publication number
- JPS5967565A JPS5967565A JP17789582A JP17789582A JPS5967565A JP S5967565 A JPS5967565 A JP S5967565A JP 17789582 A JP17789582 A JP 17789582A JP 17789582 A JP17789582 A JP 17789582A JP S5967565 A JPS5967565 A JP S5967565A
- Authority
- JP
- Japan
- Prior art keywords
- developing
- developer
- electrostatic latent
- latent image
- development
- 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.)
- Granted
Links
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
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
- G03G15/0907—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush with bias voltage
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
- Developing For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
技術分野
本発明は、静電潜像現像方法、詳しくは、内部に磁石を
有する現像スリーブを備えた磁気刷子現像装置を用いる
と共に、１磁性キヤリアとトナーとの混合物からなる２
成分系磁性現［象剤によって、静電潜像担体の表面に担
持される静電層（象を現像する形態の静電潜像現像方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a method for developing an electrostatic latent image, and more particularly, to a method for developing an electrostatic latent image using a magnetic brush developing device equipped with a developing sleeve having a magnet therein, and a method for developing an electrostatic latent image from a mixture of a magnetic carrier and a toner. Naru 2
The present invention relates to an electrostatic latent image developing method in which an electrostatic layer is supported on the surface of an electrostatic latent image carrier by a component-based magnetic developing agent.
従来技術
前記の如く静電ｍ像現像方法において用いられる磁気刷
子現像装置は、それ自体極めてコンパクトに設計され得
るという利点を有するため、現在、嘔子写真狽写礪等の
機器内における現像に広く実用化されている。BACKGROUND ART As mentioned above, the magnetic brush developing device used in the electrostatic image developing method has the advantage that it can be designed to be extremely compact, and is currently widely used for developing in equipment such as photo printing machines. It has been put into practical use.
一方近年、電子写真複写機における複写速度の高速化が
要求される様になり、それに伴い、静電潜像の高速現像
、即ち、高速（例えば４００ ｍｒｎ／ｓｅｃといった
速度）で移動する静電潜像担体の表面に担持される静電
層（象を短時間内で効率良く現像することも併せて要求
される様になって来た。On the other hand, in recent years, there has been a demand for higher copying speeds in electrophotographic copying machines, and with this, high-speed development of electrostatic latent images, that is, electrostatic latent images moving at high speeds (for example, at a speed of 400 mrn/sec), has become necessary. It has also come to be required to efficiently develop an electrostatic layer supported on the surface of an image carrier within a short period of time.
ところで、前記現像方法に関して、この様な要求に応え
るためには、換言するならば、現像効率をｕｐさせるた
めには、現像の際に用いられる磁気刷子現像装置内の現
像スリーブの数を増加させることが必要であり、その結
果、この様な要求に応えるためには、現像装置自体が大
型化せさるを得ないという問題かある。このため、前記
現像方法に関しては、現像効率をｕｐさせるために前記
の如き利点が犠牲とされてしまう訳であり、この様な犠
牲を避けるために、現像効率のｕｐに関する別の有効な
対策を講じることか望まれているのか現状である。By the way, in order to meet such demands regarding the development method, in other words, in order to increase the development efficiency, it is necessary to increase the number of development sleeves in the magnetic brush development device used during development. As a result, in order to meet such demands, the developing device itself has to be increased in size. For this reason, with regard to the development method, the above-mentioned advantages are sacrificed in order to increase the development efficiency.In order to avoid such sacrifices, another effective measure for increasing the development efficiency is taken. The current situation is whether it is necessary or desired.
発明の目的
本発明の目的は、現像の際に用いられる現像装置を実質
的に大型化することなく、現像効率のｕｐされた静電潜
像現像方法を提供することにある。OBJECTS OF THE INVENTION An object of the present invention is to provide an electrostatic latent image developing method in which development efficiency is increased without substantially increasing the size of a developing device used during development.
発明の要旨
本発明の要旨は、本発明に係る静電を替（象現像方法に
おいて、現像領域における現像剤に対してＡＣ現像バイ
アスか印加されること、及び、その現像剤の充填率か略
０，０５〜０．１５の範囲内の値とされることの２点に
ある。そして、この両者の相互作用に伴い、現像効率の
ｕｐか有効に計られるのである。SUMMARY OF THE INVENTION The gist of the present invention is that in the electrostatic developing method according to the present invention, an AC developing bias is applied to the developer in the developing area, and that the filling rate of the developer is There are two points: The value must be within the range of 0.05 to 0.15.The interaction between the two is an effective way to increase the development efficiency.
なお、前記現像方法においては、現像剤の充填率か略０
．０５〜０．１５の範囲内の値とされるこきによって現
像剤中のトナーの移動が容易に行われ得る様にな゛す、
また、ＡＣ現像バイアスが印加されることによって前記
トナーの静電層像担体表面に回かう移動か促進されるこ
とになる。そして、その結果として、前記現像効率のｕ
ｐが有効に計られる。In addition, in the above-mentioned developing method, the filling rate of the developer is approximately 0.
．． The toner in the developer can be easily moved by the abrasion having a value within the range of 0.05 to 0.15.
Further, by applying an AC developing bias, the movement of the toner to the surface of the electrostatic layer image carrier is promoted. As a result, the development efficiency u
p is effectively measured.
実施例
第１図は本発明者による現像実験の際に用いられた磁気
刷子現像装置（ＭＤ）を示し、この現像装置（ＭＤ）は
本発明に係る静電潜像現像方法を実施するのに使用され
得る。なお、前記現像装置（ＭＤ）は粉像転写型電子写
真複写機中に組み込まれているものであり、前記複写機
において、電子写真感光体ドラム（１）は矢印（ａ１方
向に４ＱＱ ｍｍ／ｓｅｃの周速で回転駆動される。こ
こで、感光体ドラム（１）の表面には画像部の最高電位
ｉ＋ｌ ４００ Ｖ、非画像部の電位路（−＋−１ａｏ
ｖの静電潜像が形成され、その表面に担持される前記の
如き静電潜像が現像装置（ＭＤ）によって現像される様
になっ、ている。Embodiment FIG. 1 shows a magnetic brush developing device (MD) used in development experiments by the present inventor, and this developing device (MD) was used to carry out the electrostatic latent image developing method according to the present invention. can be used. The developing device (MD) is built into a powder image transfer type electrophotographic copying machine, and in the copying machine, the electrophotographic photosensitive drum (1) is rotated at 4QQ mm/sec in the direction of arrow (a1). Here, the surface of the photoreceptor drum (1) has the highest potential i+l 400 V in the image area and a potential path (-+-1ao) in the non-image area.
An electrostatic latent image of v is formed, and the electrostatic latent image as described above carried on the surface is developed by a developing device (MD).
前記現像装置（ＩＶＩＤ）は、回転可能に設けられた非
磁性ステンレス材からなる現像スリーブ（２）と、その
内部に静止状態に固定された磁気ローラ（３）とを有し
ており、磁気ローラ（３）の周囲に取付られている４個
の磁石片（３ａ）の磁力は、現像スリーブ（２）の周面
においてＩＱＱＱ Ｇａｕｓｓの磁界が形成される様に
設定されている。なお、現像時において、現像スリーブ
（２）は矢印ｆｂ１方向に１５Ｏｒｐｍの回転駆動され
、現像スリーブ（２）の周面上で２成分系磁性現像剤（
Ｄｅ）を同方向・＼と搬送する。また、現像スリーブ（
２）の外径は３１Ｍであり、感光体ドラム（１）との間
に現像領域を形成すべく、ｃ＋２＝０．８Ｍの現像ギヤ
ツブを保って対向設置されている。The developing device (IVID) includes a rotatably provided developing sleeve (2) made of a non-magnetic stainless steel material, and a magnetic roller (3) fixed in a stationary state inside the developing sleeve (2). The magnetic force of the four magnet pieces (3a) attached around the developing sleeve (3) is set so that an IQQQ Gaussian magnetic field is formed on the circumferential surface of the developing sleeve (2). During development, the developing sleeve (2) is rotated at 15 Orpm in the direction of arrow fb1, and the two-component magnetic developer (
De) is transported in the same direction as \. In addition, the developing sleeve (
2) has an outer diameter of 31M, and is disposed opposite to the photoreceptor drum (1) with a developing gear of c+2=0.8M in order to form a developing area between the drums and the photosensitive drum (1).
前記現像装置（ＭＤ）において、現像剤（１）ｅ）は現
像槽（４）内に収容され、矢印ＦＣ＋方向に回転駆動さ
れる現像剤攪拌羽根（５）によって混合攪拌されるので
あるが、現像時には、矢印ｆｄ）方向に回転駆動される
バケットローラ（６）の周面に取付られている複数のバ
ケツ） （６ａ）によって現像スリーブ（２）の周面上
に供給される様になっている。なお、前記現像装置（Ｍ
Ｄ）には図示されぬトナー補給装置が付設されており、
前記現像槽（４）内に収容されている現像剤（Ｄｅ ）
のトナー濃度が常時一定の値に維持されるべく、前記現
像剤（ｔｈｅ）に対しては適時トナーが補給される。現
像スリーブ（２）の周面上に供給された現像剤（Ｄｅ）
は、その周面上に磁気吸着されると共に、穂高規制板（
７）によって搬送量の規制を受けつつ矢印（ｂ）方向へ
と搬送され、感光体ドラム（１）と現像スリーブ（２）
とが近接対向されている現像領域において現像に使用さ
れることとなる。In the developing device (MD), the developer (1) e) is housed in the developer tank (4) and mixed and stirred by the developer stirring blade (5) which is rotationally driven in the direction of arrow FC+. During development, the liquid is supplied onto the circumferential surface of the developing sleeve (2) by a plurality of buckets (6a) attached to the circumferential surface of a bucket roller (6) that is rotationally driven in the direction of arrow fd). There is. Note that the developing device (M
D) is equipped with a toner supply device (not shown),
Developer (De) contained in the developer tank (4)
Toner is replenished to the developer (the) at an appropriate time so that the toner concentration of the toner is always maintained at a constant value. Developer (De) supplied onto the circumferential surface of the developing sleeve (2)
is magnetically attracted onto its circumferential surface, and the height regulating plate (
7), the photosensitive drum (1) and the developing sleeve (2) are transported in the direction of arrow (b) while the transport amount is regulated by
It is used for development in the development area where the two are closely opposed to each other.
ここで、規制板（７）の先端は、磁石片（３ａ）の磁極
に対向して設けられており、現像スリーブ（２）の周面
に対してｄｌの穂高規制ギャップを保っている。Here, the tip of the regulating plate (7) is provided facing the magnetic pole of the magnet piece (3a), and maintains a height regulating gap of dl with respect to the circumferential surface of the developing sleeve (2).
そして、規制板（７）はｄｌの値を変化させるべく、移
動調整可能とされている。なお、現像に使用された現像
剤（１）ｅ）は更に矢印（Ｃ）方向へと搬送され、現像
槽（４）の下方へと戻され、再度現像に使用されるべく
、攪拌胴板（５）によって混合攪拌される。The regulation plate (7) is movable and adjustable in order to change the value of dl. The developer (1) e) used for development is further conveyed in the direction of arrow (C), returned to the lower part of the developer tank (4), and transferred to the stirring drum plate (1) to be used again for development. 5) to mix and stir.
ところで、前記現像スリーブ（２）に対しては、ＤＣ現
像バイアス電源（２１）、及びＡＣ現像バイアス電源（
２２）が接続されており、現像時において現像スリーブ
（２）に対して、静電潜像の極性と同極性のＤＣ現像バ
イアスが、また、１２００ ｔ（Ｚの高周波ＡＣ現像バ
イアスが重畳して印加される様になっている。これらの
電源（２１）、（２２）の電圧値は任意に変更可能であ
る。By the way, for the developing sleeve (2), a DC developing bias power source (21) and an AC developing bias power source (
22) is connected, and during development, a DC developing bias of the same polarity as the electrostatic latent image is applied to the developing sleeve (2), and a high frequency AC developing bias of 1200 t (Z) is superimposed on the developing sleeve (2). The voltage values of these power supplies (21) and (22) can be changed arbitrarily.
本発明に係る静電潜像現像方法は、前記の如き現像装置
、即ち、内部に磁石を有する現像スリーブを備えた磁気
刷子現像装置を用いると共に、磁性キャリアとトナーと
の混合物からなる２成分系磁性現像剤によって、静電潜
像担体の表面に担持される静電潜像を現像する静電潜像
現像方法であって、現像領域における現像剤に対してＡ
Ｃ現像バイアスが印加されること、及び、その現像剤の
充填率か略０．０５〜０．１５の範囲内の値とされるこ
とを特徴とするものである。そして、このこと（こより
現像効率のｕｐが、現像装置自体の大型化を実質的に強
いることなく、有効に計られる。The electrostatic latent image developing method according to the present invention uses a developing device as described above, that is, a magnetic brush developing device equipped with a developing sleeve having a magnet inside, and a two-component system consisting of a mixture of a magnetic carrier and a toner. An electrostatic latent image developing method for developing an electrostatic latent image carried on the surface of an electrostatic latent image carrier with a magnetic developer, the method comprising: A.
It is characterized in that a C developing bias is applied, and the filling rate of the developer is set to a value within the range of approximately 0.05 to 0.15. Furthermore, from this, the development efficiency can be effectively increased without substantially forcing the development device itself to become larger.
ここで、前記現像剤の充填率とは、次式、ｓ
α−一 ・・・・・■
ＰＰ
但し、α：充填率
ＰＰ：現像剤の真比重
ＰＳ：現像領域中央における現像剤の見掛比重
で表わされる値である。なお、現像領域中央における現
像剤の見掛比重ｐｓとは、感光体ドラム（１）の表面と
現像スリーブ（２）の周面とによって包囲される現像領
域中央の空間体積と、その空間内に実存する現像剤（Ｄ
ｅ）の重量とから導き出されるものである。また、現像
剤（Ｄｅ）の真比重Ｐｐとは、適正なトナー濃度、具体
的に前記現像装置（ＭＤ）に関して説明すると、トナー
補給装置の作用により一定に維持されるべき現１象剤（
１）ｅ）のトナー濃度の値に合致したトナー感度の現像
剤（Ｄｅ）の真比重を意味するものである。Here, the filling rate of the developer is expressed by the following formula: s α-1 ... ■ PP where α: Filling rate PP: True specific gravity of the developer PS: Apparent density of the developer at the center of the development area It is a value expressed in specific gravity. Note that the apparent specific gravity ps of the developer at the center of the developing area refers to the spatial volume at the center of the developing area surrounded by the surface of the photoreceptor drum (1) and the circumferential surface of the developing sleeve (2), and the volume of space within that space. Existing developer (D
It is derived from the weight of e). In addition, the true specific gravity Pp of the developer (De) refers to the appropriate toner concentration, specifically regarding the developing device (MD), the developer (De) that should be maintained constant by the action of the toner replenishing device (MD).
1) It means the true specific gravity of the developer (De) with a toner sensitivity that matches the toner density value in e).
以下、本発明者によって行われた数多くの現像実験のう
ち、代表的なものを実験例として示し、本発明に係る静
電潜像現像方法の具体的実施態様を明らかにする。Hereinafter, among the numerous development experiments conducted by the present inventor, representative ones will be shown as experimental examples to clarify specific embodiments of the electrostatic latent image developing method according to the present invention.
実施例
第１図に示される現像装置（ＭＤ）における穂高規制ギ
ャップをｄ＋ ＝ ０．２５ ｍ脣に、またＤＣ現像バ
イアス電源（２１）、ＡＣ現像バイアス電源（２２）の
電圧値を各々１５０Ｖ、５ Ｑ ＱＶ （ｐｅａｋ−ｔ
ｏ−ｐｅａｋ ）に設定すると共に、現像剤（Ｄｅ ）
として、平均粒径４０１Ｊｆｎ、抵抗値１０１４Ωα以
上の高抵抗磁性キャリアと、平均粒径１３μｍの絶縁性
トナーとの混合物からなるトナー濃度８，０ω【％の現
像剤を用い、前記現像装置（ＭＯ）によって感光体ドラ
ム（１）の表面に担持される静電潜像を現像したところ
、良好な画質の現像画像が得られた。Embodiment The height regulation gap in the developing device (MD) shown in FIG. 5 Q QV (peak-t
o-peak) and developer (De).
Using a developer having a toner concentration of 8.0Ω [%] consisting of a mixture of a high-resistance magnetic carrier having an average particle diameter of 401 Jfn and a resistance value of 1014 Ωα or more and an insulating toner having an average particle diameter of 13 μm, the developing device (MO) When the electrostatic latent image carried on the surface of the photoreceptor drum (1) was developed using the method, a developed image of good quality was obtained.
なおここで、前記現像画像の濃度を知るために、現像装
置（ＭＤ）か組み込まれている複写機によって得られる
複写画像の濃度と静電潜像の電位との関係について調へ
たところ、その結果は、第３図のグラフ中の実線ｆＡ）
で示される通りであった。第３図に示されるグラフ中、
縦軸は複写画像の濃度を、一方、横軸はその複写画像に
対応する静電潜像の電位を各々示すものである。この結
果からも明らかな様に、前記現像に際しては、感光体ド
ラム（１）の表面か４００ ｍｍ／ｓｅｃという高速で
移動されるにも拘わらす、その表面に担持される静電潜
像が効率良く、換言するならば、高濃度のトナー源とし
て現像されていることが判る。このことは、後記の比較
実施例１の結果を示す一点鎖線（１３＋と比較すれば、
より−１曽明らかである。Here, in order to know the density of the developed image, we investigated the relationship between the density of a copied image obtained by a copying machine incorporating a developing device (MD) and the potential of an electrostatic latent image. The result is the solid line fA in the graph of Figure 3)
It was as shown in In the graph shown in Figure 3,
The vertical axis represents the density of the copied image, while the horizontal axis represents the potential of the electrostatic latent image corresponding to the copied image. As is clear from this result, even though the surface of the photoreceptor drum (1) is moved at a high speed of 400 mm/sec during the development, the electrostatic latent image carried on the surface is not efficient. In other words, it can be seen that the toner is developed as a high-density toner source. This means that if you compare it with the dashed-dotted line (13+) showing the results of Comparative Example 1, which will be described later,
It is clearer than -1.
ところで、前記現像に関して本発明者が解析したきころ
によると、前記現像の際における現像剤（Ｄｅ）の挙動
の様子は第２図に模式的に示される通りのものと考えら
れる。即ち、第２図中（Ａ＋で示される、現像領域の入
口側において、現像スリーブ（２）の周面上に形成され
た現像剤（Ｄｅ ）の磁気刷子が（利極性の静電潜像を
担持する感光体ドラム（１）の表面に対して徐々に接近
される。この際、現像剤（Ｄ ｅ−）中のトナー（’ｒ
ｏ）が（−）極性の電荷を有しているため、現像スリー
ブ（２）と感光体ドラム（１）との間に形成される電界
に基づき、磁気刷子先端近傍のトナー（ＴＯ）がキャリ
ア（Ｃａ、）から分離されて高電位の静電潜像を担持す
る感光体（１）の表面・＼と付着される。なお、前記現
像の際、現像ギヤ・ノア” カｄ２＝ ９．８ａｍであ
るのに対して穂高規制ギャップがｄｉ ＝ ０．２５
ａｍと十分に小さな値に設定されている関係上、現像領
域において磁気刷子の穂は感光体ドラム（１）の表面に
対して非接触状態に保たれる。このため、前記の如きト
ナー（ＴＯ）の感光体ドラム（１）の表面・＼の付着は
、磁気刷子の先端からトナー（’ｌ’ｏ）が感光体ドラ
ム（１）の表面へ向って飛翔される結果として生ずるも
のである。Incidentally, according to the analysis conducted by the present inventor regarding the development, the behavior of the developer (De) during the development is considered to be as schematically shown in FIG. 2. That is, on the inlet side of the developing area (indicated by A+ in FIG. The surface of the photoreceptor drum (1) is gradually approached.At this time, the toner ('r
o) has a (-) polar charge, the toner (TO) near the tip of the magnetic brush becomes a carrier based on the electric field formed between the developing sleeve (2) and the photoreceptor drum (1). It is separated from (Ca, ) and attached to the surface of the photoreceptor (1) carrying a high potential electrostatic latent image. In addition, during the development, the developing gear d2 = 9.8 am, while the height regulation gap di = 0.25.
Since am is set to a sufficiently small value, the ears of the magnetic brush are kept in a non-contact state with the surface of the photoreceptor drum (1) in the development area. Therefore, the above-mentioned adhesion of toner (TO) on the surface of the photoreceptor drum (1) is caused by the toner ('l'o) flying from the tip of the magnetic brush toward the surface of the photoreceptor drum (1). This occurs as a result of the
引き続き、第２図中（Ｂｌで示される、現像領域中央に
おいて、磁気刷子は感光体ドラム（１）の表面に対して
最接近される。この状態で、前記の如く磁気刷子の穂が
感光体ドラム（１）の表面に対して非接触状態に保たれ
ること、及び磁気刷子の穂が直立状態に起立されること
等の理由により、各磁気刷子の穂は互いに離れ合ってい
る。このため、現像剤（Ｄｅ ）中のトナー（Ｔ ｏ
）の矢印（ｅ＋方向・＼の移動（飛翔）は容易に行われ
易く、また、現像スリーブ（２）に対してＡＣ現像バイ
アスか印加されていることにより、現像スリーブ（２）
と感光体ドラム（１）との間に形成されるＡＣ電界の作
用によって前記移動（飛翔）は促進されることとなる。Subsequently, the magnetic brush is brought closest to the surface of the photoreceptor drum (1) at the center of the developing area (indicated by Bl in FIG. 2). The ears of each magnetic brush are separated from each other because they are kept in a non-contact state with the surface of the drum (1) and because the ears of the magnetic brush are erected. , toner (T o ) in developer (De )
) is easily moved (flying) in the e+ direction/\, and since an AC developing bias is applied to the developing sleeve (2), the developing sleeve (2)
The movement (flight) is promoted by the action of the AC electric field formed between the photoreceptor drum (1) and the photoreceptor drum (1).
従って、この現像領域中央においては、静電潜像の電位
に応じて形成される電界に基つき、現像剤（１） ｅ
）中のトナー（ＴＯ）が感光体ドラム（１）の表面・＼
七効率良く付着し、その結果、静電潜像が効率良く現像
されることになる。特に、ここでは現像領域に存在する
現像剤（Ｄｅ ）全体か静電潜像の現像に有効に利用さ
れ、磁気刷子の穂の根元近傍に位置する現像剤（Ｄｅ
）中のトナー（ＴＯ）も感光体ドラム（１）の表面に向
って確実に移動（飛翔）されるからである。Therefore, in the center of this development area, the developer (1) e
) The toner (TO) in ) is on the surface of the photoreceptor drum (1).
As a result, the electrostatic latent image is efficiently developed. In particular, here, the entire developer (De) existing in the development area is effectively used for developing the electrostatic latent image, and the developer (De) located near the base of the magnetic brush ear is used effectively for developing the electrostatic latent image.
This is because the toner (TO) in ) is also reliably moved (flying) toward the surface of the photoreceptor drum (1).
なお、第２図中（Ｃ）で示される、現像領域の出口側に
おいて、前記磁気刷子は感光体ドラム（１）の表面から
徐々に遠避かり、前記の如きトナー（ＴＯ）の移動（飛
翔）か生じ無くなり、静電潜像の現像かここで完了され
る。In addition, on the exit side of the developing area shown by (C) in FIG. ), and the development of the electrostatic latent image is now complete.
また、第１図に示される現像装置（ＭＤ ）において、
穂高規制ギャップをｄ１＝ Ｑ、ｌ〜０゜６朋の範囲で
変更（現像ギャップはｄ２＝ Ｑ、８ｍｒｎで固定）す
ることにより本発明者がｌ＋１１したところによると、
” ｄ １ ／ｄ ２°′の値、即ちギャップ比と、現
像領域における現像剤の充填率との間には第４図に示さ
れる関係があり、前記現像に際してはｄｉ ＝０．２５
朋、ｄ ２ ＝０．８ ｉｍに設定されていることか
ら、その際の現像領域における現像剤の充填率は略０．
１０であることが判っている。併せて、ｄ＋＝Ｑ、ｌ〜
０．６酷の範囲内、即ち、ギャップ比が０．１２５〜０
，７５の範囲内では、現像領域において、現像スリーブ
の周面上に形成される現像剤の磁気刷子の穂か感光体ド
ラム（１）の表面に対して非接触状態に保たれることも
判っている。なお、第４図に示されるグラフ中、縦軸は
前記充填率を、一方、横軸はギャップ比を各々示すもの
であるか、このグラフに示される関係は、磁石片（３ａ
）によって穂高規制板（７）の先端縁近傍に形成される
磁界の状態等に応じて変動するものである。Furthermore, in the developing device (MD) shown in FIG.
According to the inventor's calculation of l+11 by changing the height regulation gap d1=Q, in the range of 1 to 0°6 (the development gap is fixed at d2=Q, 8mrn).
There is a relationship shown in FIG. 4 between the value of d 1 /d 2°', that is, the gap ratio, and the filling rate of developer in the development area, and during the development, di = 0.25.
Since d 2 is set to 0.8 im, the filling rate of the developer in the development area at that time is approximately 0.8 im.
It is known that it is 10. In addition, d+=Q, l~
Within the range of 0.6 degrees, that is, the gap ratio is 0.125 to 0.
, 75, it has been found that in the developing area, the magnetic brush ears of the developer formed on the circumferential surface of the developing sleeve are kept in a non-contact state with the surface of the photoreceptor drum (1). ing. In the graph shown in FIG. 4, the vertical axis shows the filling rate, while the horizontal axis shows the gap ratio.
) varies depending on the state of the magnetic field formed near the tip edge of the height regulating plate (7).
実施例
第１図に示される現像装置（＋ｖｌＤ）における穂高規
制ギャップをｄｉ ＝ Ｑ、８ｒｎｍに、またＤＣ現像
バイアス電源（２１）、ＡＣＣ現像バイアスミ （２２
）の電圧値を各々１００ｖ、０■に設定する以外は実験
例１と同様な条件で静電潜像の現像を行ったところ、先
端部及び後端部（感光体ドラムの移動方間を基準とした
端部）にカスレを有する、しかも低濃度の現像画像しか
得られなかった。Embodiment The height regulating gap in the developing device (+vlD) shown in FIG.
) The electrostatic latent image was developed under the same conditions as in Experimental Example 1, except that the voltage values were set to 100 V and 0 ■, respectively. A developed image with scratches on the edges) and only a low density was obtained.
得られた現像画像の濃度を知るために、実験例１の場合
と同様にして複写画像の濃度と静電潜像の電位との関係
について調べたところ、その結果は、第３図のグラフ中
の一点鎖線四で示される通りであった。即ち、前記複写
画像の最高濃度は高々０．９５にすぎず、静電潜像の現
像の効率が不十分であることが判った。なお、前記現像
に際し、現像領域において、現像スリーブ（２）の周面
上に形成される現像剤（Ｄｅ ）の磁気刷子の穂によっ
て感光体ドラム（１）の表面は摺擦される状態にあった
。In order to find out the density of the developed image obtained, we investigated the relationship between the density of the copied image and the potential of the electrostatic latent image in the same manner as in Experimental Example 1, and the results are shown in the graph of Figure 3. It was as shown by the dashed dotted line 4. That is, the maximum density of the copied image was only 0.95 at most, and it was found that the efficiency of developing the electrostatic latent image was insufficient. Note that during the development, the surface of the photoreceptor drum (1) is in a state of being rubbed by the ears of the magnetic brush of the developer (De) formed on the circumferential surface of the development sleeve (2) in the development area. Ta.
実施例
比較実験例１におけるＤＣ現像バイアス電源（２１）、
ＡＣ現像バイアス電Ａ’Ｘ （２２）の電圧値を実験例
１を同様に、１５０■、５００ Ｖ （ｐｅａｋ−ｔｏ
−ｐｅａｋ）に設定し直し、他は比較実験例１と同様
な条件で静電潜像の現像を行ったところ、若干の画像濃
度の上昇は見られたものの、前記比較実験例１の場合と
同様な現像画像しか得られなかった。DC developing bias power supply (21) in Example Comparative Experimental Example 1,
The voltage values of the AC developing bias voltage A'X (22) were changed to 150 V and 500 V (peak-to
-peak) and developed the electrostatic latent image under the same conditions as Comparative Experiment Example 1. Although a slight increase in image density was observed, it was different from the case of Comparative Experiment Example 1. Only similar developed images were obtained.
実施例
穂高規制ギャップｄ１の値を０．１〜Ｑ、５ｍｍの範囲
内で変化させることによりギヤ・ノブ比を変えつつ、即
ち、結果的には現像領域における現像剤の充填率を変え
つつ、実験例１と同様な条件で静電潜像の現像を行った
ところ、良好な画質の現像画（象が得られた。但し、得
られた現像画像の濃度は前記充填率に依存して大きく変
動していた。Example By changing the value of the height regulation gap d1 within the range of 0.1 to Q, 5 mm, the gear/knob ratio is changed, that is, the filling rate of the developer in the development area is changed as a result, When the electrostatic latent image was developed under the same conditions as in Experimental Example 1, a developed image of good quality was obtained. However, the density of the developed image was greatly dependent on the filling rate. It was changing.
得られた現像画像の濃度を知るために、現像装置（ＭＤ
）か組み込まれている複写機によって得られる複写画像
の最高濃度と前記充填率との関係について調べたところ
、その結果は、第５図に示される通りであった。第５図
に示されるグラフ中、縦軸は複写画像の最高濃度を、一
方、横軸は充填率を示すものである。第５図から明らか
な様に、現像画像の画質か良好であるにも拘わらす、充
填率か０．０５以下、あるいは０゜１５以上の場合には
、複写画像の最高濃度は１，２以下となり、静電潜像の
現像の効率が必ずしも十分てはなく、現像効率の点から
すれば前記充填率は略０．０５〜０．１５の範囲内の値
とされることが望ましいことか判る。因に、第４図に示
されるグラフより明らかな様に、充填率が０．０５．０
．１５となる場合のギャップ比は０．１６ （ｄｉ ＝
０．１３ ａｍ ）、０．５ （ｄｉ ＝０．４ｍｍ
）であった。In order to know the density of the obtained developed image, the developing device (MD
) The relationship between the maximum density of a copied image obtained by a copying machine incorporating the above-mentioned copying machine and the above-mentioned filling rate was investigated, and the results were as shown in FIG. In the graph shown in FIG. 5, the vertical axis represents the maximum density of the copied image, while the horizontal axis represents the filling rate. As is clear from Figure 5, even though the image quality of the developed image is good, if the filling ratio is less than 0.05 or more than 0°15, the maximum density of the copied image is less than 1.2. Therefore, it can be seen that the efficiency of developing the electrostatic latent image is not necessarily sufficient, and from the point of view of development efficiency, it is desirable that the filling rate be within the range of approximately 0.05 to 0.15. . Incidentally, as is clear from the graph shown in Figure 4, the filling rate is 0.05.0.
．． 15, the gap ratio is 0.16 (di =
0.13 am), 0.5 (di = 0.4mm
)Met.
実施例
ＡＣ現像バイアス（２２）の電圧値を２５０〜７００Ｖ
（ｐｅａｋ −ｔｏ −ｐｅａｋ ）の範囲内で変化
させっつ、実験例１と同様な条件で静電潜像の現像を行
ったところ、良好な画質の現像画像が得られた。Example AC developing bias (22) voltage value of 250 to 700V
When the electrostatic latent image was developed under the same conditions as in Experimental Example 1 while changing the value within the range of (peak - to -peak), a developed image of good quality was obtained.
得られた画像の濃度は、いずれの場合においても十分な
ものであったが、その濃度は前記電圧値に対して略比例
的に変動していた。The density of the obtained images was sufficient in all cases, but the density varied approximately proportionally to the voltage value.
この実験例、及び前記実験例１から明らかな様に、ＡＣ
現像バイアス（２２）の電圧値、現像剤（Ｄｅ ）の充
填率のいずれか一方、あるいは両者を調整することによ
り現像効率を任意に変化させることもでき、これらの調
整によって現像画像濃度を変化させることができること
も判る。As is clear from this experimental example and the aforementioned experimental example 1, AC
The developing efficiency can be arbitrarily changed by adjusting the voltage value of the developing bias (22), the filling rate of the developer (De), or both, and the density of the developed image can be changed by these adjustments. It turns out that it is possible.
実施例
感光体ドラム（１）の移動速度を１５０ ｍＴＶ′ｓｅ
ｃとした場合において、実験例１と同様な条件で静電潜
像の現像を行ったところ、良好な画質の、しかも高濃度
の現像画像か得られた。そしてこの場合、静電潜像の電
位か低く、その最高電位が２５０ Ｖ程度であっても高
濃度な、例えば複写画像の最高濃度で見て１．２以上の
濃度の現像画像が得られることも判った。Example The moving speed of the photoreceptor drum (1) was set to 150 mTV'se.
In case c, when the electrostatic latent image was developed under the same conditions as in Experimental Example 1, a developed image of good quality and high density was obtained. In this case, even if the potential of the electrostatic latent image is low and its maximum potential is about 250 V, a developed image with a high density, for example, a density of 1.2 or more in terms of the maximum density of the copied image, can be obtained. I also understood.
実施例
現像剤（Ｄｅ）として、平均粒径２０μｍ、抵抗値１０
１３Ωｍ以上の高抵抗磁性キャリアと、平均粒径１２μ
ｍの絶縁性トナーとの混合物からなる、トナー濃度１０
．０ω（％の現像剤を用いて実験例１〜４と同様な条件
で静電潜像の現像を行ったところ、前述の各結果と略同
−の結果が確認された。The example developer (De) had an average particle size of 20 μm and a resistance value of 10.
High resistance magnetic carrier of 13Ωm or more and average particle size of 12μ
toner concentration 10 consisting of a mixture with m insulating toner
．． When an electrostatic latent image was developed under the same conditions as in Experimental Examples 1 to 4 using a developer of 0 ω (%), substantially the same results as those described above were confirmed.
発明の効果
本発明に係る静電潜像現像方法においては、静電潜像の
現像の際、現像領域における現像剤に対してＡＣ現像バ
イアスか印加され、また、その現像剤の充填率が略０．
０５〜０．１５の範囲内の値とされるため、両者の相互
作用に伴い静電潜像が効率良く現像されることとなる。Effects of the Invention In the electrostatic latent image developing method according to the present invention, when developing an electrostatic latent image, an AC development bias is applied to the developer in the development area, and the filling rate of the developer is approximately 0.
Since the value is within the range of 0.05 to 0.15, the electrostatic latent image is efficiently developed due to the interaction between the two.
このため、現像の際に用いられる現像装置自体の大型化
を強いることなく、静電潜像を高速現像することが可能
である。Therefore, it is possible to develop an electrostatic latent image at high speed without forcing the size of the developing device itself used during development.
なお、前記現像方法においては、現像効率のｕｐが有効
に計られている関係上、前記現像方法は、静電潜像の高
速現像に限らず、全体的に低電位の静電潜像をも良好に
現像することができる。また、ＡＣ現像バイアスの電圧
値、現像剤の充填率のいずれか一方、あるいは両者を調
整することにより現像効率を任意に変化させることもで
き、このため、これらの調整によって現像画像濃度を変
化させることもできる。In addition, since the development method is effectively designed to increase the development efficiency, the development method is not limited to high-speed development of electrostatic latent images, but also develops electrostatic latent images with an overall low potential. It can be developed well. Furthermore, the developing efficiency can be arbitrarily changed by adjusting either or both of the voltage value of the AC developing bias and the filling rate of the developer, and therefore, the density of the developed image can be changed by adjusting these. You can also do that.
第１図は本発明に係る静電潜像現像方法を実施するのに
用いられる磁気刷子現像装置の一例を示す図面、第２図
は前記磁気刷子現像装置の現像領域近傍を拡大して現像
の様子を模式的に示す図面、第３〜５図は本発明者によ
って行われた実験の結果を示す図面である。
Ｍｌ）・・磁気刷子現像装置 １）ｅ・・・２成分系
磁性現像剤 Ｃａ・磁性キャリア Ｔｏ・・・トナ
ー ｄ＋・・・穂高規制ギャップ ｄ２１．現像ギ
ャップ １・・・電子写真感光体ドラム２・・・現像
スリーブ ３・・・磁気ローラ ７．・・穂高規制
板 ２２・・・ＡＣ現像バイアス電源出願人 ミノ
ルタカメラ株式会社
第３図FIG. 1 is a drawing showing an example of a magnetic brush developing device used to carry out the electrostatic latent image developing method according to the present invention, and FIG. 2 is an enlarged view of the vicinity of the developing area of the magnetic brush developing device. The drawings schematically showing the situation, and FIGS. 3 to 5 are drawings showing the results of experiments conducted by the present inventor. Ml)...Magnetic brush developing device 1)e...Two-component magnetic developer Ca/magnetic carrier To...Toner d+...Bear height regulation gap d21. Development gap 1... Electrophotographic photosensitive drum 2... Development sleeve 3... Magnetic roller 7. ...Hot height regulation plate 22...AC developing bias power supply Applicant Minolta Camera Co., Ltd. Figure 3
Claims (1)
子現像装置を用いると共に、磁性キャリアとトナーとの
混合物からなる２成分系磁性現像剤によって、静電潜像
担体の表面に担持される静電潜像を現像する静電潜像現
像方法であって、現像頭載における現像剤に対してＡＣ
現像バイアスか印加されること、及び、その現１象剤の
充填率か略０．０５〜０．１５の範囲内の値とされるこ
とを特徴とする静電潜像現像方法。 ２ 前記磁気刷子現像装置において、磁石か静止状態に
保たれる一方、現像スリーブか一定方向に回転駆動され
ることを特徴とする特許請求の範囲第１項記載の静電潜
像現像方法。 ３、現像領域において、現像スリーブの周面上に形成さ
れる現像剤の磁気刷子の穂か静電潜像担体の表面（こ対
して非接触状態るこ保たれることを特徴とする特許請求
の範囲第１項には第２項記載の静電層（像現像方法。[Claims] 1. A magnetic brush developing device equipped with a developing sleeve having a magnet inside is used, and a two-component magnetic developer consisting of a mixture of a magnetic carrier and a toner is used to develop the surface of an electrostatic latent image carrier. An electrostatic latent image developing method for developing an electrostatic latent image carried on a
1. A method for developing an electrostatic latent image, characterized in that a developing bias is applied, and the filling rate of the developer is set to a value within the range of approximately 0.05 to 0.15. 2. The electrostatic latent image developing method according to claim 1, wherein in the magnetic brush developing device, the magnet is kept stationary, while the developing sleeve is rotationally driven in a fixed direction. 3. A patent claim characterized in that in the developing region, the ears of the magnetic brush of the developer formed on the peripheral surface of the developing sleeve are kept in a non-contact state with the surface of the electrostatic latent image carrier. In the range 1, the electrostatic layer described in 2 (image development method).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17789582A JPS5967565A (en) | 1982-10-08 | 1982-10-08 | Electrostatic latent image developing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17789582A JPS5967565A (en) | 1982-10-08 | 1982-10-08 | Electrostatic latent image developing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5967565A true JPS5967565A (en) | 1984-04-17 |
| JPH041909B2 JPH041909B2 (en) | 1992-01-14 |
Family
ID=16038934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17789582A Granted JPS5967565A (en) | 1982-10-08 | 1982-10-08 | Electrostatic latent image developing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5967565A (en) |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59121077A (en) * | 1982-12-28 | 1984-07-12 | Toshiba Corp | Electrostatic latent image developing device |
| JPS6021072A (en) * | 1983-07-14 | 1985-02-02 | Konishiroku Photo Ind Co Ltd | Developing method and device |
| JPS60230146A (en) * | 1984-04-27 | 1985-11-15 | Mita Ind Co Ltd | Electrophotographic developing method |
| JPS6159358A (en) * | 1984-08-30 | 1986-03-26 | Konishiroku Photo Ind Co Ltd | Formation of image |
| JPS61128260A (en) * | 1984-11-27 | 1986-06-16 | Mita Ind Co Ltd | Developing method for electrophotography |
| JPS61190362A (en) * | 1985-02-20 | 1986-08-25 | Canon Inc | Electrophotographic copying device |
| JPS6263970A (en) * | 1985-09-17 | 1987-03-20 | Canon Inc | Developing device |
| JPS6275686A (en) * | 1985-09-30 | 1987-04-07 | Canon Inc | Developing device |
| JPS6275687A (en) * | 1985-09-30 | 1987-04-07 | Canon Inc | Developing device |
| JPS6275685A (en) * | 1985-09-30 | 1987-04-07 | Canon Inc | Developing device |
| JPS6275680A (en) * | 1985-09-30 | 1987-04-07 | Canon Inc | Developing device |
| JPS6275684A (en) * | 1985-09-30 | 1987-04-07 | Canon Inc | Developing device |
| JPS6275656A (en) * | 1985-09-30 | 1987-04-07 | Canon Inc | Developing device |
| JPS62112169A (en) * | 1985-11-11 | 1987-05-23 | Canon Inc | Developing method |
| JPS62112172A (en) * | 1985-11-11 | 1987-05-23 | Canon Inc | Developing method |
| JPS62192757A (en) * | 1986-02-20 | 1987-08-24 | Canon Inc | Developing method |
| JPS62192756A (en) * | 1986-02-20 | 1987-08-24 | Canon Inc | Developing method |
| JPS62218978A (en) * | 1986-03-19 | 1987-09-26 | Sanyo Electric Co Ltd | Developing device |
| JPS63225265A (en) * | 1987-03-16 | 1988-09-20 | Canon Inc | Developing device |
| JPH0289066A (en) * | 1988-09-27 | 1990-03-29 | Mita Ind Co Ltd | Developing method |
| US4914094A (en) * | 1985-12-09 | 1990-04-03 | Otsuka Pharmaceutical Co., Ltd. | Method for treating hypoxia |
| US5440378A (en) * | 1992-10-06 | 1995-08-08 | Minolta Camera Kabushiki Kaisha | Developing device accommodating a two component developer and method of using same |
| US5574545A (en) * | 1985-09-02 | 1996-11-12 | Canon Kabushiki Kaisha | Method for transferring toner from developer carrying member to image bearing member using chains of magnetic particles formed on developer carrying member and contacting image bearing member, and alternating electric field |
| CN102460271A (en) * | 2009-04-22 | 2012-05-16 | 株式会社宜客斯 | Optical filter and display evaluation system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55118049A (en) * | 1979-03-07 | 1980-09-10 | Canon Inc | Developing method |
| JPS55134863A (en) * | 1979-04-06 | 1980-10-21 | Canon Inc | Electrophotographic developing method |
-
1982
- 1982-10-08 JP JP17789582A patent/JPS5967565A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55118049A (en) * | 1979-03-07 | 1980-09-10 | Canon Inc | Developing method |
| JPS55134863A (en) * | 1979-04-06 | 1980-10-21 | Canon Inc | Electrophotographic developing method |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59121077A (en) * | 1982-12-28 | 1984-07-12 | Toshiba Corp | Electrostatic latent image developing device |
| JPS6021072A (en) * | 1983-07-14 | 1985-02-02 | Konishiroku Photo Ind Co Ltd | Developing method and device |
| JPS60230146A (en) * | 1984-04-27 | 1985-11-15 | Mita Ind Co Ltd | Electrophotographic developing method |
| JPH0519708B2 (en) * | 1984-04-27 | 1993-03-17 | Mita Industrial Co Ltd | |
| JPS6159358A (en) * | 1984-08-30 | 1986-03-26 | Konishiroku Photo Ind Co Ltd | Formation of image |
| JPH0570150B2 (en) * | 1984-08-30 | 1993-10-04 | Konishiroku Photo Ind | |
| JPS61128260A (en) * | 1984-11-27 | 1986-06-16 | Mita Ind Co Ltd | Developing method for electrophotography |
| JPS61190362A (en) * | 1985-02-20 | 1986-08-25 | Canon Inc | Electrophotographic copying device |
| US5574545A (en) * | 1985-09-02 | 1996-11-12 | Canon Kabushiki Kaisha | Method for transferring toner from developer carrying member to image bearing member using chains of magnetic particles formed on developer carrying member and contacting image bearing member, and alternating electric field |
| JPS6263970A (en) * | 1985-09-17 | 1987-03-20 | Canon Inc | Developing device |
| JPS6275656A (en) * | 1985-09-30 | 1987-04-07 | Canon Inc | Developing device |
| JPS6275684A (en) * | 1985-09-30 | 1987-04-07 | Canon Inc | Developing device |
| JPS6275680A (en) * | 1985-09-30 | 1987-04-07 | Canon Inc | Developing device |
| JPS6275686A (en) * | 1985-09-30 | 1987-04-07 | Canon Inc | Developing device |
| JPS6275687A (en) * | 1985-09-30 | 1987-04-07 | Canon Inc | Developing device |
| JPS6275685A (en) * | 1985-09-30 | 1987-04-07 | Canon Inc | Developing device |
| JPS62112169A (en) * | 1985-11-11 | 1987-05-23 | Canon Inc | Developing method |
| JPS62112172A (en) * | 1985-11-11 | 1987-05-23 | Canon Inc | Developing method |
| US4914094A (en) * | 1985-12-09 | 1990-04-03 | Otsuka Pharmaceutical Co., Ltd. | Method for treating hypoxia |
| JPS62192756A (en) * | 1986-02-20 | 1987-08-24 | Canon Inc | Developing method |
| JPS62192757A (en) * | 1986-02-20 | 1987-08-24 | Canon Inc | Developing method |
| JPS62218978A (en) * | 1986-03-19 | 1987-09-26 | Sanyo Electric Co Ltd | Developing device |
| JPS63225265A (en) * | 1987-03-16 | 1988-09-20 | Canon Inc | Developing device |
| JPH0289066A (en) * | 1988-09-27 | 1990-03-29 | Mita Ind Co Ltd | Developing method |
| US5440378A (en) * | 1992-10-06 | 1995-08-08 | Minolta Camera Kabushiki Kaisha | Developing device accommodating a two component developer and method of using same |
| CN102460271A (en) * | 2009-04-22 | 2012-05-16 | 株式会社宜客斯 | Optical filter and display evaluation system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH041909B2 (en) | 1992-01-14 |
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