JPS5926760A - Developing device - Google Patents

Developing device

Info

Publication number
JPS5926760A
JPS5926760A JP57136022A JP13602282A JPS5926760A JP S5926760 A JPS5926760 A JP S5926760A JP 57136022 A JP57136022 A JP 57136022A JP 13602282 A JP13602282 A JP 13602282A JP S5926760 A JPS5926760 A JP S5926760A
Authority
JP
Japan
Prior art keywords
toner
mesh body
photosensitive drum
developing device
applying
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
Application number
JP57136022A
Other languages
Japanese (ja)
Other versions
JPH0341828B2 (en
Inventor
Shigenobu Osawa
大沢 重信
Toshihiro Kasai
笠井 利博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Computer Basic Technology Research Association Corp
Original Assignee
Computer Basic Technology Research Association Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Computer Basic Technology Research Association Corp filed Critical Computer Basic Technology Research Association Corp
Priority to JP57136022A priority Critical patent/JPS5926760A/en
Publication of JPS5926760A publication Critical patent/JPS5926760A/en
Publication of JPH0341828B2 publication Critical patent/JPH0341828B2/ja
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/06Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

PURPOSE:To obtain a stable and sharp picture all the time, by providing a toner supplying part with a conductive mesh body so that to bring into contact with or passes through the toner, and applying a specific potential to this mesh body. CONSTITUTION:A developing device 2 arranged facing a grounded photosensitive drum 1 is provided with the conductive mesh body 5 almost horizontally at the internal lower part of the toner supplying part 3 which supplies single-component toner 4, which falls through the mesh body 5. The surface of a conductive developing roll 6 for conveying the toner 4 from the toner supplying part 3 is treated by applying sand blast and the surface rotates as shown by the arrow (b); the toner 4 is leveled uniformly by a specifying blade 7. A grid 8 provided between the photosensitive drum 1 and developing roll 6 applies voltages from power sources 12 and 13 to the photosensitive drum 1.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は、たとえば電子複写機の感光体ドラムに形成さ
れた静電潜像を現像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 developing an electrostatic latent image formed on a photosensitive drum of, for example, an electronic copying machine.

〔発明の技術的背景〕[Technical background of the invention]

最近、この種の現像装置として、像担持体としての感光
体ドラムとトナー保持体としての現像ローラどの間に互
いに平行な複数本のワイヤからなるグリッドを設り、こ
のグリノ19および現像ローラに直流および交v1シあ
るいt、1そのいずれかの偏倚電圧を印加することによ
り、現像ローラで搬送される一成分トナーを飛翔さW、
かつそのトナーを現像ローラとグリッドとの間で一種の
・!ウダークラウt゛状kt!にして、感)Y―体l。
Recently, as this type of developing device, a grid made of a plurality of parallel wires is installed between the photosensitive drum as an image carrier and the developing roller as a toner holding member, and a direct current is applied to the grid 19 and the developing roller. By applying a bias voltage of either V1 or T, 1, the one-component toner conveyed by the developing roller is caused to fly W,
And the toner is transferred between the developing roller and the grid. Udaklau t-shaped kt! and feeling) Y-body l.

ラム上の静電潜像を現像するものが開発されつつある。Developing electrostatic latent images on rams is being developed.

〔背景技術の問題点〕[Problems with background technology]

しかしながら、このような方式の現1′!!装Uには次
のような問題があった。すなわち、安定した画質を得る
ためにt:ll、1ナ一保持体と1.ての現像ローラ土
に充分に帯電されだトヲ一層を形成させることであるが
、従来の装面でe、1、現像ローラに近接しで設けられ
たトナーの規制ブレードとの摩擦帯電のみであるだめ、
充分なトプ−の摩擦帯電が得られない。このため、たと
えば飛翔L7た帯電nの小さいトナーが感光体ドラムの
非潜像部に付着してしまうなどの現象が生じ、複写画像
にカブリが発生したり、複写画像のラインにニノミある
いけ太りなどが生じるという問題があった。
However, the current state of such a method is 1'! ! The U-U had the following problems. That is, in order to obtain stable image quality, t:ll, 1 holder and 1. The purpose of this is to form a sufficiently charged layer on the soil of the developing roller, but in the conventional surface mounting, only frictional electrification occurs with the toner regulation blade provided in the vicinity of the developing roller. No good,
Sufficient triboelectrification cannot be obtained. As a result, phenomena such as flying toner with a small charge n adhering to the non-latent image area of the photoreceptor drum occur, causing fog on the copied image and lines in the copied image becoming too thick. There was a problem that something like this would occur.

し発明の目的〕 本発明1.1、上記事情に鑑みてなされたもので、その
目的とするところを」1、トナ・−に充分な電荷を均一
に与えることができ、もってカプリなどのない常に安定
した鮮明な画質が得られる現像装置を提供することにあ
る。
OBJECTS OF THE INVENTION] The present invention 1.1 has been made in view of the above circumstances, and has the following objects: To provide a developing device that can always provide stable and clear image quality.

〔発明のイ既要〕[Existing requirements of the invention]

本発明しJ、トナー供給部にトナーが接触あるい(rよ
通過する導電性の網目体を設け、この網目体にトナーの
極性に応じた所定の電位を印加することにより、網目体
を通過するトナーに電荷を充分にかつ均一に与えるよう
にしだものである。
According to the present invention, an electrically conductive mesh member is provided in the toner supply section, and the toner passes through the mesh member by applying a predetermined potential depending on the polarity of the toner to the mesh member. The purpose of this is to sufficiently and uniformly apply an electric charge to the toner to be used.

〔発明の実hflI例〕 以下、本発明の一実施例について図面を参照して説明す
る。
[Example of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

第1図において、IF口!を子複写機にお一1i)る像
担持体、たとえば感光体ドラムで、図示しない露光手段
によってその表面に原f^の画像に対応した静電潜像が
形成されるものであり、図示矢印&方向に回転する。な
お、この感光体ドラム1tま電気的に接地される。し7
かして、上記感光体ドラム1と相対向する部位には現像
装置2が近接して配設されている。この現像装置2につ
いて説明すると、3F、1、−成分トナー4を供給する
トナー供給部で、その内部の下刃にtit、導′t1(
性の網目体5が略水平状態に張設されでおり、l・ナー
4がこの網目体5を通過して下方に落下するようになっ
ている。6は」二記トナー供給部3から供給されるトナ
ー4を搬送する)・ナー保持体、たとえば導電性の現像
ローラで、その表面#−,tトナーを搬送できるように
サンドブラストされており、図示矢印す方向に回転する
。7け規制ブレードで、現像ローラ6で搬送されるトナ
ーの厚さを均一にレベリングする。8t」、グリッドで
、感光体ドラム1と現像ローラ6との間に配設されてい
る。このグリッド8をよ、たとえば第2図に示すように
複数本の導電性ワイー)・9・・・かり4いに平行に配
設されてなり、これら各ワイヤ9・・・はその両端部が
ワイヤ支持板10.10によってそれぞれ支持されてい
る1、そしで、上記各ワイヤ9・・・は、第1図に示す
ように感光体ドラム1の表面からの距離が同一となるよ
うに、つまり感光体ドラム1と同心円となるよう円弧状
に配列されている。ここに、上記各ワイヤ9・・・tよ
、その表面に絶縁性#膜が形成されており、直径が12
0 tlntで、それぞれ1m間隔で配設されている。
In Figure 1, the IF port! An image bearing member, such as a photosensitive drum, which is attached to the secondary copying machine, has an electrostatic latent image corresponding to the original image formed on its surface by an exposure means (not shown), and is indicated by the arrow shown in the drawing. & Rotate in direction. Note that this photosensitive drum 1t is electrically grounded. 7
A developing device 2 is disposed in close proximity to a portion facing the photosensitive drum 1. To explain this developing device 2, it is a toner supply section that supplies 3F, 1, - component toner 4, and a lower blade inside it has a tit, a guide 't1 (
A transparent mesh body 5 is stretched in a substantially horizontal state, and the L-ner 4 passes through this mesh body 5 and falls downward. 6 is a toner holder (for example, a conductive developing roller that conveys the toner 4 supplied from the toner supply section 3), whose surface is sandblasted so that it can convey the toner #-, t, and is shown in the figure. Rotate in the direction of the arrow. Seven regulation blades uniformly level the thickness of the toner conveyed by the developing roller 6. 8t'' grid, which is arranged between the photosensitive drum 1 and the developing roller 6. For example, as shown in FIG. 2, this grid 8 is made up of a plurality of conductive wires (9) arranged in parallel to each other, and each of these wires (9) has both ends thereof 1 supported by the wire support plates 10, 10, respectively, and the wires 9... They are arranged in an arc shape so as to be concentric with the photoreceptor drum 1. Here, each wire 9...t has an insulating # film formed on its surface, and has a diameter of 12
0 tlnt, and are arranged at 1 m intervals.

なお、上記表面の絶縁性薄膜け、現像ローラ6との間あ
るいは感光体ドラムIとの間で放電が生じないようにす
るために必要である。
The insulating thin film on the surface is necessary to prevent discharge from occurring between the developing roller 6 and the photosensitive drum I.

一方、11は網目体5に所定の電ri7を与えるだめの
直?Ir、N、源、12および13は現像ローラ6への
バイアス電源であり、12は直流電源、13は交流iW
4源である。また、14および15はグリッド8へのバ
イアス電源であり、14Fよ直流電源、I5け交がf、
電源である。t−1〜で、上記直流電源11,12,1
41(よ、用いるトナーの極性に応じて出力電圧の極性
(正゛またF」、負)を切換スイッチ16,17.18
によつ°CUノ換えられるようになっている。
On the other hand, 11 is a direct line for applying a predetermined electric current ri7 to the mesh body 5. Ir, N, sources, 12 and 13 are bias power supplies to the developing roller 6, 12 is a DC power supply, 13 is an AC iW
There are four sources. In addition, 14 and 15 are bias power supplies to the grid 8, 14F is a DC power supply, I5 is connected to f,
It is a power source. At t-1~, the DC power supplies 11, 12, 1
41 (Y, switch 16, 17, 18 to change the polarity of the output voltage (positive or F, negative) according to the polarity of the toner used.
It is designed to be exchangeable depending on °CU.

このような槽底において、゛まず、たとえばトナー4と
して比抵抗が2.1 X 10” (1−副で非磁性の
負帯電性トナー(平均粒径lo、qoミクロン)を使用
し、直流電源1ノの出力11イ、川を−6007げルト
とじて、その負電圧を網目体5に印加した。網目体5は
、細粒標準ふるい(JISZ−8801)のiooメツ
シコ=(ふるい目の開き0.149.門)のものを使用
した9、このよりなトナー帯11条件に対し、直流型、
源12の出力型、圧を−20011ボルト、交流電源1
3の出力型、用を2000ボルト(周波数けI ICl
lz )、直流電源14の出力電圧を+200 yl?
ルト、交流市、源15の出力型、用を1000ボルト(
周波数t」、目(fly、)、交Mr、 ?[T、源1
3,15の出力電圧は同位相に設定して′A験を行った
結果、1可条佳で網目体5を使用しないときに比較して
、カブリがなく、ラインもシャープで、兄に安定し/ζ
*L明な複写画像が111られた。すなわち、規制グレ
ード7と現像1)−ラ6とによるトナーの摩擦帯電だけ
で11、現像に必要なトナーの帯電■、が充分に得られ
ず、飛′111 Lだ帯itj量の小さいトナーが感光
体ドラノ・1の非潜像部に付着し、複写画像にカブリな
どが発生したのに対し、トナー供給部3内に導電性の網
目体5を設置し、これに数百)1?ルトの直流′dイ圧
を印加することにより、トナー4が紐1目体5を接触、
通過する際、そのトナー4に電荷を注入し、逆帯電性ト
ナーを生ずることなく、トナー4に電荷を充分にかつ均
一に力えることができ、常に安定した鮮明な複写画像が
イ11られるものである。さらに、網1」休5に印加す
る電圧を変化させることにより、トナー4の電荷量を任
意に制御でき、これにより画像濃度を調整することも可
能である。
At the bottom of such a tank, first, for example, use a non-magnetic negatively charged toner (average particle size lo, qo microns) with a specific resistance of 2.1 x 10'' as toner 4, and turn on a DC power supply. 1 output 11i, the river was closed at -6007 gelt, and the negative voltage was applied to the mesh body 5. 0.149.) was used, and for this tight toner band 11 conditions, the DC type,
Power source 12 output type, pressure -20011 volts, AC power source 1
3 output type, use 2000 volts (frequency
lz), the output voltage of the DC power supply 14 is +200 yl?
Ruto, AC city, source 15 output type, use 1000 volts (
Frequency t'', fly, ), intersection Mr, ? [T, source 1
As a result of conducting an A test with the output voltages of 3 and 15 set to the same phase, there was no fogging, the line was sharper, and it was more stable than the older brother, compared to when the mesh body 5 was not used.し/ζ
*A clear copy image was created. In other words, due to the frictional electrification of the toner due to regulation grade 7 and development 1)-ra 6, sufficient toner electrification required for development cannot be obtained, and the toner with a small amount of stagnation is To solve this problem, a conductive mesh body 5 was installed in the toner supply section 3, and several hundred) 1? By applying direct current pressure from the base, the toner 4 comes into contact with the string 1,
When passing, the toner 4 is injected with a charge, and the toner 4 is sufficiently and uniformly charged without producing reversely charged toner, and a stable and clear copy image is always produced. It is. Furthermore, by changing the voltage applied to the halftone dots 1 and 5, the amount of charge on the toner 4 can be arbitrarily controlled, thereby making it possible to adjust the image density.

次に、たとえVよトナー4とし−C比抵抗が4,3X1
0100・副で磁性の負帯電性トナー(31’均粒径1
1,2ミクロン)を使用し、網目体5に一400デルト
の電圧を印加し、その他tよ前記の場合と同条件で実F
Aを行った結果においても、前記の46自と同様にカブ
リがなく、ラインもシャープで、常に安定した鮮明な複
写画(’if!がイ(Jられた。
Next, even if V is toner 4, -C specific resistance is 4.3X1
0100・Magnetic negatively charged toner (31' average particle size 1
1.2 microns), apply a voltage of -400 delt to the mesh body 5, and apply an actual F under the same conditions as above.
As with the 46 copies mentioned above, the results of performing A also showed that there was no fog, the lines were sharp, and the copies were always stable and clear.

なお、前pQ実bT!i例でし−1−1電イ複写機の現
(QJ装置に実施l−だ場合しこついて説明したが、こ
れに限らず、たとえば電子プリンタあるい(」ファクシ
ミリなどの現像装置にも同様に実施し1(Iる。
In addition, the previous pQ real bT! In the example 1-1, we have explained that it is applied to the current QJ device of an electronic copying machine, but the same applies to developing devices such as electronic printers and facsimiles. It was carried out in 1 (I).

〔発明の効果〕〔Effect of the invention〕

以上詳述したように本発明によれば、トナーに充分な電
荷を均一に与えることができ、もってカブリなどのない
′帛に安定し、た鮮明な画質が得られる現像装置を提供
できる。
As described in detail above, according to the present invention, it is possible to provide a developing device that can uniformly apply a sufficient charge to toner, thereby providing stable and clear image quality without fogging.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の一実施例を示す構成図、第2図をよ同
実施例におけるグリッドを詳細に示す構成図である。 1・・・感光体ドラム(像担持体)、2・・・現像装置
、3・・・トナー供給部、4・・・トナー、5・・・網
目体、6・・・現像ローラ(トナー保持体)、8・・・
グリッド、9・・・ワイヤ、11,12.14・・・直
流電源、13.15・・・交流電源。 出願人代理人 弁理士 鈴 江 武 彦第1図
FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a block diagram showing the grid in detail in the same embodiment. DESCRIPTION OF SYMBOLS 1... Photosensitive drum (image carrier), 2... Developing device, 3... Toner supply section, 4... Toner, 5... Mesh body, 6... Developing roller (toner holding body), 8...
Grid, 9...Wire, 11, 12.14...DC power supply, 13.15...AC power supply. Applicant's agent Patent attorney Takehiko Suzue Figure 1

Claims (1)

【特許請求の範囲】[Claims] トナー供給部と、このトナー供給部および静Y[潜像が
形成される像担持体と近接して配設さ)]前i]2トナ
ー供給部から供給されるトナ・−を搬送するトナー保持
体とを具備し、前記トナー保持体に偏倚電圧を印加する
ことにより、前記トナー保持体で搬送されるトナーを飛
翔させて前記静電潜像を現像する現像装置において、前
記トナー供給部にトナーが接触あるいは通過する導′f
I!、性の網目体を設け、この網目体に所定の電位を印
加するように榊成してなることをl特徴とする現像装置
a toner supply section, this toner supply section and a static Y [disposed close to the image bearing member on which a latent image is formed] front i] 2 toner holder that conveys the toner supplied from the toner supply section; In the developing device, which develops the electrostatic latent image by applying a bias voltage to the toner holder to cause the toner conveyed by the toner holder to fly, the toner is supplied to the toner supply unit. The conductor'f that touches or passes through
I! 1. A developing device characterized in that it is provided with a transparent mesh body, and is formed so as to apply a predetermined potential to the mesh body.
JP57136022A 1982-08-04 1982-08-04 Developing device Granted JPS5926760A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57136022A JPS5926760A (en) 1982-08-04 1982-08-04 Developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57136022A JPS5926760A (en) 1982-08-04 1982-08-04 Developing device

Publications (2)

Publication Number Publication Date
JPS5926760A true JPS5926760A (en) 1984-02-13
JPH0341828B2 JPH0341828B2 (en) 1991-06-25

Family

ID=15165351

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57136022A Granted JPS5926760A (en) 1982-08-04 1982-08-04 Developing device

Country Status (1)

Country Link
JP (1) JPS5926760A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4876573A (en) * 1986-07-18 1989-10-24 Sharp Kabushiki Kaisha Developing method using non-magnetic one-component toner and developing unit therefor
EP0424180A2 (en) * 1989-10-20 1991-04-24 Xerox Corporation Printing apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS528830A (en) * 1975-07-11 1977-01-24 Fuji Photo Film Co Ltd Electrophotographic development method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS528830A (en) * 1975-07-11 1977-01-24 Fuji Photo Film Co Ltd Electrophotographic development method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4876573A (en) * 1986-07-18 1989-10-24 Sharp Kabushiki Kaisha Developing method using non-magnetic one-component toner and developing unit therefor
EP0424180A2 (en) * 1989-10-20 1991-04-24 Xerox Corporation Printing apparatus

Also Published As

Publication number Publication date
JPH0341828B2 (en) 1991-06-25

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