JPS59197061A - Developing device of electrostatic latent image - Google Patents
Developing device of electrostatic latent imageInfo
- Publication number
- JPS59197061A JPS59197061A JP7136883A JP7136883A JPS59197061A JP S59197061 A JPS59197061 A JP S59197061A JP 7136883 A JP7136883 A JP 7136883A JP 7136883 A JP7136883 A JP 7136883A JP S59197061 A JPS59197061 A JP S59197061A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- latent image
- developing roller
- electrostatic latent
- developing
- 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
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
- G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
- G03G15/081—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by the developer handling means after the supply and before the regulating, e.g. means for preventing developer blocking
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/06—Developing structures, details
- G03G2215/0634—Developing device
- G03G2215/0636—Specific type of dry developer device
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Developing For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の技術分野］
本発明は、電子写真装置、静電記録装置等の静電潜像を
可視可する現像装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a developing device for making an electrostatic latent image visible in an electrophotographic device, an electrostatic recording device, or the like.
［発明の技術的背景とその問題点］
静電潜像をキャリアとトナーを用いて可視像イヒする２
成分乾式現像装置では従来、キャリア及びトナーを静電
潜像面に直接当て、現像を行々つて来た。このだめ、電
子写真装置では鉄粉など力・らなるキャリアにより感光
体に傷がつき、寿命を短かくしたシ、また、多色記録の
場合、先に現像されたトナーが、かき取られてしまうな
どの問題力５あった。これを解決する手段として、トナ
ーを静電潜像面と離して現像を行々う非接触現像、トナ
ーを保持する現像ローラに静電潜像面に軽く接触させて
現像を行なうインプレッション現像々どｈ５提案されて
いる。例えば、特開昭５６−１１６０６０号公報には非
接触現像装置が開示されている。[Technical background of the invention and its problems] Converting an electrostatic latent image into a visible image using a carrier and toner 2
Conventionally, component dry type developing devices have carried out development by applying carrier and toner directly to the electrostatic latent image surface. Unfortunately, in electrophotographic devices, the photoreceptor is scratched by forceful carriers such as iron powder, shortening its lifespan.Also, in the case of multicolor recording, the toner that was developed first is scraped off. There were 5 problems such as putting things away. As a means to solve this problem, there are non-contact development, in which development is carried out by separating the toner from the electrostatic latent image surface, and impression development, in which development is carried out by bringing the developing roller that holds the toner into light contact with the electrostatic latent image surface. h5 has been proposed. For example, Japanese Patent Application Laid-Open No. 56-116060 discloses a non-contact developing device.
この装置は、第１図にも示されるように、絶縁性非磁性
トナー（１１）を用い、現像ローラ０渇及び感光ドラム
（１３）を非接触で設け、かつ両者の間に多孔質電極ａ
０を配置している。As shown in FIG. 1, this device uses insulating non-magnetic toner (11), provides a developing roller (13) and a photosensitive drum (13) in a non-contact manner, and has a porous electrode (a) between them.
0 is placed.
絶縁性非磁性トナー（１１）は、弾性ブレードＩにより
、回転する現像ローラθりの表面上に押しつけられ、摺
擦帯電により付着し、現像ローラ圓上に薄層を形成する
。The insulating non-magnetic toner (11) is pressed onto the surface of the rotating developing roller θ by the elastic blade I, adheres to it by frictional charging, and forms a thin layer on the developing roller.
薄層化されたトナー（１１１は、電源α９によシ現像ロ
ーラ（（支）及び多孔質電極αυの間に発生した交番電
界により、感光ドラム峙上の静電潜像に飛翔し、現像が
達成される。The thinned toner (111) flies to the electrostatic latent image on the surface of the photosensitive drum due to an alternating electric field generated between the developing roller (support) and the porous electrode αυ by the power supply α9, and the development is completed. achieved.
この上う々装置では、トナーの帯電がブレードとの摩擦
によってしか得られないので、帯電量が十分に得られな
かったシ、不均一になりやすい、あるいけトナーが現像
ローラ上でフィルミングするなどの問題がある。In this type of device, the toner can only be charged by friction with the blade, so the amount of charge cannot be obtained sufficiently, it tends to be uneven, and the toner tends to film on the developing roller. There are problems such as.
また、特開昭５４−１１６２４０号公報にはインプレッ
シ讐ン現像装置が開示されている。この装置は第２図に
示されるように現像容器■υ内に数本のマク゛ネット（
２２を内蔵した円筒状のスリーブ（ハ）が回転可能に設
けられ、トナーとキャリアからなる現像剤（２（イ）が
収納されておυ、スリーブ（ハ）の回転によって現像剤
の磁気ブラシを形成する。スリーブ（至）上−ラ（２５
１が設けられている。蜂だ導電性ゴムローラ（ハ）は、
静電潜像（図示せず）を保持した感光体門にも接触する
ように設けられ、かつ加圧スプリング（２７）によって
軽く加圧されている。スリーブ（２階上を移動する現像
剤よシミ源弼によってトナーの帯電極性と逆極性の電圧
を印加されている導電性ゴムローラ（ハ）にトナが静電
的に塗布されトナ一層（２９）を形成する。トナ一層ｅ
匂は感光体（２６）と同方向等速 ゛で移動し、接触
点で、静電潜像を現像する。Furthermore, Japanese Patent Application Laid-Open No. 116240/1983 discloses an impression developing device. As shown in Figure 2, this device consists of several macronets (
A cylindrical sleeve (c) with a built-in tube (22) is rotatably provided, and a developer (2 (b)) consisting of toner and carrier is stored in the sleeve (c). By rotating the sleeve (c), a magnetic brush of the developer is moved. Form the sleeve (to) top-ra (25
1 is provided. Bee conductive rubber roller (ha)
It is also provided so as to be in contact with a photoreceptor gate holding an electrostatic latent image (not shown), and is lightly pressurized by a pressure spring (27). The toner is electrostatically applied to a conductive rubber roller (c) to which a voltage of opposite polarity to the charged polarity of the toner is applied by the stain source to the developer moving on the sleeve (two floors above), and the toner layer (29) is applied. Form. Tona layer e
The scent moves in the same direction as the photoreceptor (26) at a constant speed and develops an electrostatic latent image at the point of contact.
この装置では、トナーの帯電量の不均一さ、トナーのフ
ィルミングは改善されるが、トナーが感光ドラムに押し
つけられるため、地力ブリを生じたシゴムローラ表面の
トナーが固着し、しだい如トナーのフィルミングを生ず
る欠点がある。This device improves the non-uniformity of toner charge and toner filming, but since the toner is pressed against the photosensitive drum, the toner on the surface of the rubber roller, which has developed ground force blur, sticks to the surface, and the toner gradually becomes filmed. It has the disadvantage of causing smearing.
［発明の目的コ
この発明は上述した従来装置の欠截を改良したもので、
地力ブリのない記録画を得ることの出来る静電潜像現像
装置を提供するにある。他の目的はトナーのフィルミン
クの生じない現像装置を提供するにある。更に他の目的
は感光体の長寿命化を可能にする静電潜像現像装置を提
供するにある。[Object of the Invention] This invention improves the deficiencies of the above-mentioned conventional device,
To provide an electrostatic latent image developing device capable of obtaining recorded images without blurring. Another object is to provide a developing device that does not cause toner filming. A further object of the present invention is to provide an electrostatic latent image developing device that makes it possible to extend the life of a photoreceptor.
［発明の概要］
本発明はトナーとキャリアよりなる現像剤を保持した導
電性の現像剤保持ローラよりトナーを静電的に導電性の
現像ローラに塗布してトナ一層を形成し、トナーに圧力
が加わらないように感光体と現像ローラは所定のギャッ
プを持って離間しておシかつ、感光体表面とトナ一層と
は接触している状態とし、感光体と現像ローラ間に交流
電圧を印加しつつ感光体上の静電潜像を現像するもので
ある。[Summary of the Invention] The present invention involves electrostatically applying toner to a conductive developing roller from a conductive developer holding roller holding a developer consisting of toner and carrier, forming a single layer of toner, and applying pressure to the toner. The photoreceptor and the developing roller are separated by a predetermined gap to prevent the application of voltage, and the surface of the photoreceptor and the toner layer are in contact, and an alternating current voltage is applied between the photoreceptor and the developing roller. The electrostatic latent image on the photoreceptor is developed at the same time.
〔発明の効果」
本発明では、現像ローラを感光体に付勢させず所定のギ
ャップで離間させているので、トナーは感光体にも、現
像ローラにも押しつけられることはない２．従がって、
感光体の非潜像部にトナーが付着しに＜＜、現像ローラ
上でトナーがフィルミンクを起こすこともない。さらに
、感光体と現像ローラ感に交流電圧を印加しつつ、現像
するととによシ、潜像部に付着するトナー厚を均一化し
、かつ非潜像部のトナーを除去できるので、画像濃度の
均一な、地力ブリのかい良好な記録画を得ることが出来
る。またカラー現像においても、トナーに圧力が加わっ
ていないので、既に現像されたトナー像を乱すことなく
、かつ、感光体と現像ローラの周速のズレが多少あって
も、既現像のトナー像を乱すことなく良好ガカラー画像
を得ることができる。[Effects of the Invention] In the present invention, since the developing roller is not urged against the photoreceptor and is separated by a predetermined gap, the toner is not pressed against either the photoreceptor or the developing roller.2. Accordingly,
The toner does not adhere to the non-latent image area of the photoconductor and does not cause filming on the developing roller. Furthermore, when developing while applying an AC voltage to the photoconductor and the developing roller, the thickness of the toner adhering to the latent image area can be made uniform and the toner in the non-latent image area can be removed, so the image density can be improved. It is possible to obtain a uniform recording image with good texture. Also, in color development, since no pressure is applied to the toner, the toner image that has already been developed is not disturbed, and even if there is a slight discrepancy between the circumferential speeds of the photoreceptor and the developing roller, the toner image that has already been developed can be processed. Good color images can be obtained without disturbance.
［発明の実施例］ 本発明を図面を用いて詳細に説明する。[Embodiments of the invention] The present invention will be explained in detail using the drawings.
第３図は本発明の一実施例における現像装置とその周辺
部分を示す概略構成図で、図中Ｑｌ）は感光体ドラムを
示している。この感光体ドラムＣ３］）はアルミニウム
等の導電性金属から力るローラ本体（３４の表面にセレ
ン等の光導電材料からなる感光層田を被覆したもので、
矢印Ａ方向に回転自在に構成されている。FIG. 3 is a schematic configuration diagram showing a developing device and its surrounding parts in one embodiment of the present invention, and Ql) in the figure indicates a photosensitive drum. This photosensitive drum C3) is a roller body (34) made of a conductive metal such as aluminum, the surface of which is coated with a photosensitive layer made of a photoconductive material such as selenium.
It is configured to be rotatable in the direction of arrow A.
このような感光体ドラムＧυに形成された静電潜像を現
像する現像装置□□□）は、上記感光体ドラム（３１）
の感光面とギャップを持って設けられている現像ローラ
Ｃ３５１と、この現像ローラＧωに所定の間隔で対向す
る磁気ブラシ現像器（財）吉から構成されている。The developing device (□□□) that develops the electrostatic latent image formed on the photoreceptor drum Gυ is the photoreceptor drum (31).
The developing roller C351 is provided with a gap from the photosensitive surface of the developing roller C351, and a magnetic brush developing device Kichi faces the developing roller Gω at a predetermined interval.
この磁気ブラシ現像器（至）の現像容器（３７）内底部
にはトナーとこのトナーを摩擦帯電させるキャリアとか
らなる現像剤（ｌ（Ｅ９が適量収容されている。本発明
に使用されるトナは帯電量が約１μｃ／ｇから数１０μ
ｃ／ｇのものが使用できるが、好ましいトナーの帯電量
は１．５μｃ／ｇから１５μｃ／ｇである。まだ、現像
容器ＧＤｉ内には円筒体からなるスリーブＣ３１が前記
現像剤（至）に接触した状態で矢印Ｂ方向に回転自在に
設けられている。このスリーブ０１内には円柱状に形成
された磁気ローラ（４（１）が上記スリーブ（３１内面
に対して非接触に同軸配置されている。この磁石ローラ
（４［）はその周囲に磁石（４＋）を配設したもので、
磁極が所定の位置より移動しないように固定されている
。The inner bottom of the developer container (37) of this magnetic brush developer (to) contains an appropriate amount of developer (E9) consisting of toner and a carrier that triboelectrically charges the toner. The amount of charge is about 1 μc/g to several tens of μ
Although a toner having a charge amount of 1.5 μc/g to 15 μc/g can be used, a preferable toner charge amount is 1.5 μc/g to 15 μc/g. A sleeve C31 made of a cylindrical body is still provided in the developer container GDi so as to be rotatable in the direction of arrow B while being in contact with the developer. Inside this sleeve 01, a cylindrical magnetic roller (4(1)) is arranged coaxially with the inner surface of the sleeve (31) without contacting it. 4+) is installed,
The magnetic poles are fixed so that they do not move beyond a predetermined position.
しかして、このような磁気ブラシ現像器（ト）は、上記
磁石（４１）の磁気作用によって現像剤（至）をスリー
ブＣ３１の外表面に吸着させることによシ図中■に示す
ような磁気ブラシを形成している。なお、スリーブ０優
の外周面の一部に所定の圧力で接触しているドクタと呼
ばれ４掻落板（４っけ、使用に供された後にスリーブ（
３ωに残存した現像剤を掻落するものである。寸た、現
像容器（３７）の現像剤（７）に埋没される位置には回
転自在に攪拌羽根（４３１が設けられており現像剤（至
）を攪拌してトナーを摩擦帯電している。Therefore, such a magnetic brush developing device (G) has a magnetic brush as shown in (■) in the figure by attracting the developer (X) to the outer surface of the sleeve C31 by the magnetic action of the magnet (41). forming a brush. In addition, there are 4 scraping plates (4 scraping plates) called a doctor that are in contact with a part of the outer circumferential surface of the sleeve with a predetermined pressure.
This is to scrape off the developer remaining on the 3ω. In addition, a stirring blade (431) is rotatably provided at a position buried in the developer (7) of the developer container (37) to agitate the developer (431) and triboelectrically charge the toner.
前記現像ローラＧ■は導電性ローラで、アルミニウムな
どの金属、まだはカーボンなどを混入した導電性ゴム、
あるいはゴムローラ表面に導電性材料からなる薄膜を被
覆しだものなどを利用できる。The developing roller G■ is a conductive roller made of metal such as aluminum, conductive rubber mixed with carbon, etc.
Alternatively, a rubber roller whose surface is coated with a thin film made of a conductive material can be used.
スリーブ（３１に接続する第１の直流電源（４（イ）１
柚も４枦占繋琶ヰ÷普→→著嫡（噌＋とこれと接続する
交流電源（４ツからなる第１の電源＋４［９によりスリ
ーブ（では偏奇した交流電圧が与えられる。現像ローラ
（３５１には第２の直流電源（４７）とこれに接続する
交流電源（・円からなる第２の電源（４１１０により偏
奇した交流電圧が与えられる。本実施例では第１．第２
の電源を構成する交流電源として共通の交流電源を使用
しているが熱論、別々の交流電源を用いてもｆ４い。ま
た、第１．第２の直流電源のいずれかを設けず、交流電
源だけで第１または第２の電源を構成しても良い。感光
ドラム０１）のドラム本体（３ツは接地されている。The first DC power supply (4 (a) 1 connected to the sleeve (31)
Yuzu also has 4 connections, 琶 ヰ ÷ PU → → 噌 (噌+) and an AC power supply connected to it (the first power supply consisting of 4 + 4 [9 leads to the sleeve (an eccentric AC voltage is applied to the developing roller. (351 is supplied with an eccentric AC voltage by a second DC power source (47) and an AC power source (4110) connected to it.
A common AC power source is used as the AC power source that constitutes the power source, but in theory, it is also possible to use separate AC power sources. Also, 1st. The first or second power source may be configured only with an AC power source without providing either the second DC power source. The drum body (three drum bodies) of the photosensitive drum 01) are grounded.
次にこの静電潜像装置の動作を説明する。なお感光体ド
ラム（３ｊ）の感光面には正極性の静電潜像（図示せず
）が形成されている。スリーブ（３１の矢印Ｂ方向への
回転に伴ない、現像剤（至）はスリーブ（３俤の外周面
を移動する。現像剤（至）は磁石４０の磁気作用により
磁気ブラシを形成する。現像ローラ（３■に対向する位
置にある磁気ブラシ■は現像ローラＣ３５）表面に軽く
接触する程度に形成される。この磁気ブラシの厚みは現
像容器Ｇ′？）に取付けられたドクターブレード（４匂
で規制される。磁気ブラシが密度高く強く現像ローラＧ
ωに接っすると磁気ブラシの電気抵抗が小さくなり第１
の電源（４６）と第２の電源（４１１０によってスリー
ブ（３ωと現像ローラＧωの間に印加された電圧がリー
クし、この間に十分な電圧を印加できなくなる。また、
一度付着したトナーが再び磁気ブラシに戻る効果も大き
くなり好ましくない。Next, the operation of this electrostatic latent image device will be explained. Note that a positive electrostatic latent image (not shown) is formed on the photosensitive surface of the photosensitive drum (3j). As the sleeve (31) rotates in the direction of arrow B, the developer (31) moves on the outer peripheral surface of the sleeve (31).The developer (31) forms a magnetic brush by the magnetic action of the magnet 40. The magnetic brush (2) located opposite the roller (3) is formed to the extent that it lightly contacts the surface of the developing roller C35.The thickness of this magnetic brush is equal to the thickness of the doctor blade (4 The magnetic brush is densely and strongly applied to the developing roller G.
When it comes into contact with ω, the electrical resistance of the magnetic brush becomes smaller and the first
The voltage applied between the sleeve (3ω) and the developing roller Gω by the power supply (46) and the second power supply (4110) leaks, making it impossible to apply sufficient voltage between them.
The effect of the toner once attached returning to the magnetic brush is also increased, which is undesirable.
従がって現像ローラ（ト）とスリーブ（３０の間のギャ
ップに対して、スリーブ０１内とドクタブレード（ｒ１
９１のそれがやや小さい方が好ましい結果が得られる。Therefore, with respect to the gap between the developing roller (T) and the sleeve (30), the inside of the sleeve 01 and the doctor blade (r1
A preferable result can be obtained if the value of 91 is slightly smaller.
この例では、現像ローラ（３５）とスリーブ（至）の間
のギャップは３ ａｍ 、スリーブ（３樟とドクタブレ
ード１０の間のギャップは２．５關に調整されている。In this example, the gap between the developing roller (35) and the sleeve is adjusted to 3 am, and the gap between the sleeve and the doctor blade 10 is adjusted to 2.5 am.
現像剤ｔａ中の負に帯電されたトナーは第１の電源（４
６）と第２の電源器により現像ローラ（３ツ側が高電位
になるように設定された電圧印加により磁気ブラシ■よ
り現像ローラ（至）周面に静電的に塗布され、トナ一層
（５０を形成する。第１の電源（４匂と第２Ｊ電源（４
８）から・リーブ（３０、現像ローラ（至）に各々印加
される電圧波形を第４図に示す。交流電源を共用してい
るので現像ローラｔ３５）とスリーブ（３ω間には一定
電圧が印加され、その値は第１の直流電源（４４）の電
圧値と第２の直流電源（４７）の電圧値によって定めら
れる。ｉ・ナ一層ＳＣＯの厚さは現像ローラ６！５１と
スリーブ（３ω間の直流電圧値によって制御される。本
発明に於ては、このトナ一層の厚みは重壁で、現像ロー
ラ（３５１と感光面と離間した状態で、かつ、トナーが
感光面に接触するに十分な厚みを形成する必要がある。The negatively charged toner in the developer ta is supplied to the first power source (4
6) and the second power supply, a voltage is applied so that the developing roller (3 side) has a high potential, and the toner is electrostatically applied to the circumferential surface of the developing roller (to) by the magnetic brush (2), and a layer of toner (50 The first power supply (4 odors) and the second J power supply (4
Figure 4 shows the voltage waveforms applied to the leave (30) and developing roller (to) from 8).Since they share the AC power supply, a constant voltage is applied between the developing roller t35) and the sleeve (3ω). The value is determined by the voltage value of the first DC power source (44) and the voltage value of the second DC power source (47). In the present invention, the thickness of this toner layer is heavy-walled, and the developing roller (351) is separated from the photosensitive surface, and the thickness of the toner layer is controlled by the DC voltage value between them. It is necessary to form a sufficient thickness.
トナー７１５０）の厚みとしては数μ〜数１００μの範
囲が可能であるが、機械的精度などを考慮して約１０μ
〜約１００μの厚みが好ましい。スリ１ブ０つの回転方
向と現像ローラ０５）の回転方向の関係は、同方向、逆
方向いずれでも良いが磁石の強さ、トナー濃度などを考
慮して、トナ一層＋５１）を厚くすることのできる方向
が選択されるべきである。この実施例では直径３２ ｍ
ｍのスリーブＧ９も直径３０關の現像ローラ（３９も同
方向で周速が同じＫなるように駆モータ。The thickness of toner 7150) can be in the range of several microns to several hundred microns, but in consideration of mechanical precision etc., it is approximately 10 microns thick.
A thickness of ~100μ is preferred. The rotation direction of the sleeve 10 and the rotation direction of the developing roller 05) may be the same or opposite, but considering the strength of the magnet, toner concentration, etc., it is recommended to make the toner layer thicker. The possible direction should be chosen. In this example, the diameter is 32 m.
Sleeve G9 of m is also a developing roller with a diameter of 30 degrees (39 is also driven by a drive motor so that the circumferential speed is the same in the same direction.
ギア（図示せず）で駆動されている。トナーは感光ドラ
ムＧηと現像ローラｃ３Ｅ９が離間して対向する位置で
感光層（ト）に接触する。感光ドラム（３１）と現像ロ
ーラＧ９け同方向へ同じ周速で駆動されている。感光ド
ラム０υと現像ローラＧ９の間には第２の電源器によシ
、第２の直流電源（４ηから発生する直流バイアス電圧
ＶＢに交流電源（４９から発生する交流電圧ＶＡが重畳
された電圧が印加される。感光ドラム（３ηの静電潜像
電位をＶＴ、残留電位Ｖａである時、第４図に示したよ
うに残留電位ＶＲよ）大きく設定した直流バイアス電圧
値ＶＢに交流電圧値ＶＡを重畳して印極性のトナーは、
その電位差に応じて、潜像部に付着し、潜像部を可視化
する。ｍ縁電位Ｖｒと印加電圧のピーク値の差■１がト
ナーが感″／ｌｙ＃（’−’ｉに移動を始める現像開始
電圧よシ大きくなるように印加電圧値を設定することに
より未現像時間をなくすことが出来る。未潜像部におい
ても、トナは接触しているので、感光層（ト）に機械的
に付着する。印加電圧値が感光層（ハ）の残留電位ＶＲ
より高い区間ＡＢの時間では、トナーは現像ローラ（幻
に静電的に引張られ、感光層■よ）離れる。印加電圧値
が感光層の残留電位ＶＲよシ低い区間ＢＣの時間ではト
ナーは感光層（へ）に引張られるが、残留電位ＶＲと印
加電圧の最小ピーク値の差Ｖ２（第４図に示されている
）が現像開始電圧値よりも小さくなるように印加電圧値
を設定することにより、実質的にはトナーの感光層への
移動がない状態をつくることができる。従がって、潜像
部では均一な潜像電位に応じたトナー付着量が得られ、
未潜像部ではトナー付着が除去される。潜像電位＋７０
０Ｖ、残留電位＋８０Ｖの感光層（ト）に対して、第１
の直流電源（４４）電圧値−５０Ｖ、第２の直流電源（
４η電圧値＋１５０■、交流電源（４つの交流電圧値５
００Ｖ （振幅値）、周波数１．２ ＫＨｚの条件で現
像したところ、地力ブリのない良好外記録画が得られた
。また、同一条件で作成した感光体と従来の磁気ブラシ
現像装置を用いた複写機と本実施例の装置を使用して、
感光体の寿命試験を行なったところ、従来装置では、約
１万枚の記録で記録画に著るしい劣化が見られたが、本
実施例の装置に於ては初期の画質と変ることの彦い良好
な記録画が得られた。It is driven by a gear (not shown). The toner contacts the photosensitive layer (G) at a position where the photosensitive drum Gη and the developing roller c3E9 are spaced apart and face each other. The photosensitive drum (31) and the developing roller G9 are driven in the same direction at the same peripheral speed. A second power supply is connected between the photosensitive drum 0υ and the developing roller G9, and a voltage in which an AC voltage VA generated from the AC power source (49) is superimposed on a DC bias voltage VB generated from the second DC power source (4η) is connected between the photosensitive drum 0υ and the developing roller G9. is applied to the photosensitive drum (when the electrostatic latent image potential of 3η is VT and the residual potential Va is the residual potential VR as shown in FIG. 4), the AC voltage value is set to the DC bias voltage value VB which is set to a large value. Toner with polarity by superimposing VA is
Depending on the potential difference, it adheres to the latent image area and visualizes the latent image area. The difference between the edge potential Vr and the peak value of the applied voltage is set so that the applied voltage value is greater than the development start voltage at which the toner begins to move from 1 to 2 ('-'i). Even in the non-latent image area, the toner is in contact and mechanically adheres to the photosensitive layer (G).The applied voltage value is equal to the residual potential VR of the photosensitive layer (C).
At higher interval AB times, the toner leaves the developer roller (which is phantom electrostatically pulled away from the photosensitive layer 1). During interval BC, where the applied voltage value is lower than the residual potential VR of the photosensitive layer, the toner is pulled toward the photosensitive layer, but the difference V2 between the residual potential VR and the minimum peak value of the applied voltage (as shown in FIG. 4) By setting the applied voltage value so that the voltage (which is less than the development start voltage value) is smaller than the development start voltage value, it is possible to create a state in which there is substantially no movement of toner to the photosensitive layer. Therefore, in the latent image area, a uniform toner adhesion amount corresponding to the latent image potential can be obtained.
Toner adhesion is removed in non-latent image areas. Latent image potential +70
For the photosensitive layer (G) with 0V and residual potential +80V, the first
DC power supply (44) voltage value -50V, second DC power supply (
4η voltage value + 150■, AC power supply (4 AC voltage values 5
When the image was developed under the conditions of 00V (amplitude value) and a frequency of 1.2 KHz, a good recorded image with no ground force blur was obtained. In addition, using the photoreceptor manufactured under the same conditions, a copying machine using a conventional magnetic brush developing device, and the apparatus of this example,
When we conducted a lifespan test of the photoreceptor, we found that with the conventional device, there was significant deterioration in the recorded images after approximately 10,000 sheets were recorded, but with the device of this example, there was no change in image quality from the initial image quality. A very good recorded image was obtained.
［本発明の他の実施例、］
第５図は本発明の他の実施例の静電潜像装置の概略説明
図である。図中、第３図と同じものは同番号で示す。こ
の装置は、感光ドラム６カの感光層（ハ）表面と現像ロ
ーラＧ句表面とのギャップを正確に維持するために現像
ローラ６５１と同軸に、自由に回動するリングガイド６
Ｄを設けたものである。現像ローラ０句とリングガイド
６υは同じ軸りに取り付けられておシ引張シバネなどの
付勢手段（至）により、常時、リングガイド５１）端面
が、感光層（ト）表面と接触しているので感光層曽表面
と現像（−ラ（ハ）表面のギャップを常に一定に維持で
きる。まだ、現像ローラ（３５１とリングガイド（５１
）を同軸に連結し、かつ付勢手段ｔ５３）と連結して、
移動可能にしたことによシ、感光ドラム（３］）と現像
ローラ６最のギャップ変更がリングガイド６υの交換の
みによって可能となり現像剤が変わってトナ一層（！ｉ
ｏの厚みが変化しても対応できる装置となっている。[Another Embodiment of the Present Invention] FIG. 5 is a schematic explanatory diagram of an electrostatic latent image device according to another embodiment of the present invention. In the figure, the same parts as in FIG. 3 are indicated by the same numbers. This device has a ring guide 6 that freely rotates coaxially with the developing roller 651 in order to accurately maintain the gap between the surface of the photosensitive layer (C) of the photosensitive drum 6 and the surface of the developing roller G.
D is provided. The developing roller 0 and the ring guide 6υ are attached to the same shaft, and the end surface of the ring guide 51 is always in contact with the surface of the photosensitive layer (g) by means of a biasing means such as a tension spring. Therefore, the gap between the photosensitive layer (Z) surface and the developing (-RA) surface can always be maintained constant.
) are coaxially connected and connected to the biasing means t53),
By making it movable, the gap between the photosensitive drum (3) and the developing roller 6 can be changed simply by replacing the ring guide 6υ, and the developer can be changed and the toner layer (!i
The device can handle changes in the thickness of the o.
以上述べた実施例においては正極性の静電潜像を負極性
のトナーで現像する場合について述べたが、負極性の静
電潜像を正極性のトナーで現像する場合、または反転現
像する場合に於ても、本発明の静電潜像男７像装置が適
用されるのは勿論であ石。In the embodiments described above, the case where a positive polarity electrostatic latent image is developed with a negative polarity toner is described, but when a negative polarity electrostatic latent image is developed with a positive polarity toner or reverse development is performed. Of course, the electrostatic latent image device of the present invention can also be applied to this field.
第１図は従来の非接触現像装置の概略説明図、第２図は
従来のインプレッション現像装置の概略説明図、第３図
は本発明の一実施例の構成図、第４図は第３図に示され
る装置の効果を説明するための電圧波形を示す図、第５
図は本発明の他の実施例の構成図。
３１・・・感光ドラム、あ・・・現像ローラ、３６・・
・磁気ブラシ現像装置、４６・・・第１の電源、４８・
・・第２の電源、５１・・リングガイドっ代理人 弁理
士 則 近 憲 佑
（ほか１名）
第、８図
３７
第４図
第５図Fig. 1 is a schematic explanatory diagram of a conventional non-contact developing device, Fig. 2 is a schematic explanatory diagram of a conventional impression developing device, Fig. 3 is a configuration diagram of an embodiment of the present invention, and Fig. 4 is a schematic explanatory diagram of a conventional impression developing device. Figure 5 shows voltage waveforms to explain the effects of the device shown in Figure 5.
The figure is a configuration diagram of another embodiment of the present invention. 31...Photosensitive drum, ah...Developing roller, 36...
-Magnetic brush developing device, 46...first power supply, 48.
...Second power supply, 51...Ring Guide agent Patent attorney Kensuke Chika (and 1 other person) No. 8, Fig. 37, Fig. 4, Fig. 5
Claims (1)
現像剤を攪拌し、トナーを摩擦帯電させる手段と、現像
剤をその表面に保持し、これを搬送する導電性の現像剤
保持ローラとを有する現像剤収納器と、前記静電潜像保
持体と前記現像剤保持ローラの間に位置する導電性の現
像ローラと、前記現像剤保持ローラと前記現像ローとの
間に前記トナーの帯電極性と逆極性電圧を印加する第１
の電源と、前記静電潜像保持体と前記現像ローラの間如
交流電圧または交流電圧および直流電圧を印加する第２
の電源とを具備し、前記静電潜像保持体が前記現像ロー
ラとは非接触で、前記現像ローラ上に形成されるトナ一
層とは接触する如く〜、前記現像ローラを設けたことを
特徴とする静電潜像現像装置。(1) An electrostatic latent image holder, a means for stirring a developer consisting of toner and carrier and triboelectrically charging the toner, and a conductive developer holding roller that holds the developer on its surface and transports it. a conductive developing roller located between the electrostatic latent image holder and the developer holding roller, and a toner container between the developer holding roller and the developing roller; The first to apply a voltage with opposite polarity to the charging polarity.
a second power source for applying an alternating current voltage or an alternating current voltage and a direct current voltage between the electrostatic latent image holder and the developing roller;
The developing roller is provided such that the electrostatic latent image holder is not in contact with the developing roller but is in contact with a layer of toner formed on the developing roller. An electrostatic latent image developing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7136883A JPS59197061A (en) | 1983-04-25 | 1983-04-25 | Developing device of electrostatic latent image |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7136883A JPS59197061A (en) | 1983-04-25 | 1983-04-25 | Developing device of electrostatic latent image |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59197061A true JPS59197061A (en) | 1984-11-08 |
Family
ID=13458484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7136883A Pending JPS59197061A (en) | 1983-04-25 | 1983-04-25 | Developing device of electrostatic latent image |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59197061A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988007707A1 (en) * | 1987-03-24 | 1988-10-06 | Matsushita Electric Industrial Co., Ltd. | Developing device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5640862A (en) * | 1979-09-11 | 1981-04-17 | Canon Inc | Developing device |
-
1983
- 1983-04-25 JP JP7136883A patent/JPS59197061A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5640862A (en) * | 1979-09-11 | 1981-04-17 | Canon Inc | Developing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988007707A1 (en) * | 1987-03-24 | 1988-10-06 | Matsushita Electric Industrial Co., Ltd. | Developing device |
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