JPS58198056A - Controlling device of copying method - Google Patents

Controlling device of copying method

Info

Publication number
JPS58198056A
JPS58198056A JP57082042A JP8204282A JPS58198056A JP S58198056 A JPS58198056 A JP S58198056A JP 57082042 A JP57082042 A JP 57082042A JP 8204282 A JP8204282 A JP 8204282A JP S58198056 A JPS58198056 A JP S58198056A
Authority
JP
Japan
Prior art keywords
positive
bias voltage
copying
voltage
polarity
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
JP57082042A
Other languages
Japanese (ja)
Other versions
JPH0343619B2 (en
Inventor
Nobuo Ueda
上田 暢夫
Masashi Fujita
昌史 藤田
Hideaki Hirahara
平原 秀昭
Yutaka Watanabe
裕 渡辺
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.)
Minolta Co Ltd
Original Assignee
Minolta Co Ltd
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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP57082042A priority Critical patent/JPS58198056A/en
Publication of JPS58198056A publication Critical patent/JPS58198056A/en
Publication of JPH0343619B2 publication Critical patent/JPH0343619B2/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
    • G03G15/065Arrangements for controlling the potential of the developing electrode

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Developing For Electrophotography (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To obtain an unexpensive copying method controlling device by applying voltage having different polarity from one of the 1st and the 2nd development bias voltage sources to a developing means by switching a copying method and then applying the sum of both the voltages to a glid electrode at different polarity. CONSTITUTION:At the time of positive-positive copying, alteration switches S1, S2 are turned to the contacts (a), (c) sides respectively. Voltage from an AC voltage source 6 is applied to a corona electrode 5 of a corona charger 4 for electrostatic charging and positive polarity voltage Vg2 consisting of the sum of voltages Vb1, Vb2 from the development bias voltage sources 10a, 10b is applied to a glid electrode 7 to charge the surface of a photoreceptor 3 evenly at electric potential approximately equal to the Vg2. After exposing a picture and forming an electrostatic latent image, positive polarity DC bias voltage Vb2 is applied from the development bias voltage source 10b to a development roller 10 and negative polarity toner is adhered to the picture part. At the time of negative-positive copying, the switches S1, S2 are turned to the contacts (b), (d) sides and the voltages Vg2, Vb2 are switched to negative polarity voltages Vg1, Vb1 to perform development.

Description

【発明の詳細な説明】 技術分野 本発明はネガ−ポジ、ポジーポジ方式による複写が可能
なマイクロリーダプリンター等の複写機における複写方
式制御装置に関する。
TECHNICAL FIELD The present invention relates to a copying method control device for a copying machine such as a microreader printer capable of copying by negative-positive and positive-positive methods.

従来技術 マイクロリーダプリンター等において、例えばネガ原稿
からポジ像を得るには感光体を帯電用コロナチャージャ
で第1極性に均一帯電し、続いて画像露光して静電潜像
を形成し、こf′lを現像して転写紙に転写する。この
際、現像時にσ現像電極に所定極性のバイアス電圧全印
加して光照射部にのみ琲像剤が付着するよう制御する。
In conventional microreader printers, for example, in order to obtain a positive image from a negative original, a photoreceptor is uniformly charged to a first polarity using a charging corona charger, and then an electrostatic latent image is formed by image exposure. 'l is developed and transferred to transfer paper. At this time, during development, the full bias voltage of a predetermined polarity is applied to the σ development electrode to control the developer so that it adheres only to the light irradiated area.

一方、ポジーポジ複写の場合Fげ感光体への均一帯電時
の極性と現像時のバイアス電圧印加極性が夫々ネガ−ポ
ジの場合の逆極性となる。
On the other hand, in the case of positive-positive copying, the polarity when uniformly charging the F-coated photoreceptor and the polarity of bias voltage application during development are opposite to those in the case of negative-positive copying.

従ってネガ−ポジ、ポジーポジの複写方式の選択によっ
て帯電用コロナチャージャの極性と現像バイアス電圧の
極性を切換える必要がある。これに関し、従来では帯電
用コロナチャージャとして一般に5〜6 KV以上の直
流高圧電源に接続されたものを用いていたため、極性切
換用スイッチとして特殊で高価なものを必要とした。更
にこのような直流コロナチャージャハ環境条件に著しく
左右され往々にして帯電ムラが生じ鮮明な画像が得られ
ないという欠点があり0 発明の目的 本発明は上記欠点を解消するために成ざf″lたもので
、その目的と−するところは、ネガ−ポジ、ポジーポジ
複写が可能な複写機において、構成及び制御が簡素で特
殊スイッチを必要としない安価な複写方式制御装置を提
供することにある。
Therefore, it is necessary to switch the polarity of the charging corona charger and the developing bias voltage by selecting the negative-positive or positive copying method. In this regard, in the past, a corona charger connected to a DC high voltage power supply of 5 to 6 KV or higher was used, which required a special and expensive polarity switch. Furthermore, the direct current corona charger has the drawback that it is significantly affected by environmental conditions, often causing uneven charging and making it impossible to obtain clear images. Its purpose is to provide an inexpensive copying system control device that has a simple configuration and control and does not require special switches for a copying machine capable of negative-positive and positive-positive copying. .

実施例 まずネガ−ポジ、ポジーポジ複写方式について説明する
。第1a〜e図はネガ原稿からポジ像を得る場合の複写
方式を示し、まず第1a図に示すように導電性基板(1
)上に光導電層(2)を積層してなる感光体(3)の表
面を帯電用コロナチャージャ(4)で第1の極性(負極
性)Vr均一帯電する。ここで本発明でに後でも詳述す
るが該コロナチャージャ(4)として交流スコロトロン
タイプのものを用いている。即ち、コロナ電極(5)は
交流電圧源(6)に接続される一方、コロナ電極(5)
と感光体(3)間に直流バイアス電圧(Vg 1)が印
加されるメツシュ板のようなグリッド電極(7)全配設
し、コロナ電極(5)に交流電圧を印加するとともにグ
リッド電極(7) K直流バイアス電圧(Vgl)i印
加して帯電する。この種のスコロトロンタイプのコロナ
チャージヤVrアって汀感光体への表面電位ケグリッド
電極(7)に印加する常圧に略等しく制御できるという
利点がある。更に環境変化による影響をほとんど受けず
常に均一に帯電できるという優rたコロナチャージャで
ある。
Embodiment First, the negative-positive and positive-positive copying systems will be explained. Figures 1a to 1e show a copying method for obtaining a positive image from a negative original. First, as shown in Figure 1a, a conductive substrate (1
) The surface of a photoreceptor (3) formed by laminating a photoconductive layer (2) thereon is uniformly charged with a first polarity (negative polarity) Vr using a charging corona charger (4). As will be described in detail later in the present invention, an AC scorotron type corona charger is used as the corona charger (4). That is, the corona electrode (5) is connected to the AC voltage source (6), while the corona electrode (5)
A grid electrode (7) such as a mesh plate to which a DC bias voltage (Vg 1) is applied between the photoconductor (3) and the photoreceptor (3) is provided. ) Apply K DC bias voltage (Vgl)i to charge. This type of scorotron type corona charger Vr has the advantage that the surface potential of the photoreceptor can be controlled to be approximately equal to the normal pressure applied to the grid electrode (7). Furthermore, it is an excellent corona charger that is almost unaffected by environmental changes and can be charged uniformly at all times.

均一帯電さrた感、光体(3は続いて第1b図に示すよ
うにネガ原稿(8)に対して画@g光されて静電潜像が
形成される。次にこの静電潜像は第1c図に示すように
反転現像される。これは例えは磁気ブラシ法によって行
わハるが、現像ローラ(9)に現像バイアス電圧源(,
10a)からトナー(11)と同極性の直流バイアス電
圧(Vbl)’に印加して光照射部に対応する部分にト
ナー(11) ’!に付着させる。
After being uniformly charged, the light body (3) is then illuminated with light on the negative original (8) to form an electrostatic latent image, as shown in FIG. 1b. The image is reversely developed as shown in FIG.
A DC bias voltage (Vbl)' of the same polarity as the toner (11) is applied from 10a) to the part corresponding to the light irradiation part toner (11)'! attach it to.

反転現像後、第1d図に示すようにトナー像は直流電圧
源(12)に接続さrた転写用コロナチャージャ(13
)l/Cよって転写紙(14)上に転写される。そして
最後に第1e図に示す如くヒートローラ(15)により
定着j?、最終的にネガ原稿からポジ画像が得らrる。
After reversal development, the toner image is transferred to a transfer corona charger (13) connected to a DC voltage source (12), as shown in Figure 1d.
)l/C onto the transfer paper (14). Finally, as shown in FIG. 1e, the heat roller (15) fixes the image. , a positive image is finally obtained from the negative original.

ポジーポジ複写σ第2 a −e図に示す方法によって
行われる。基本的にはネガ−ポジ複写の場合と同じであ
るが、第2 a @に示すように感光体(3)へのコロ
ナチャージャ(4)による均一帯電は逆極性(正極性)
で行わわ、このためグリッド電極(7)には正極の直流
バイアス電圧(、Vg2)が印加ばれるようvrなって
いる。均一帯電さねた感光体に続いてポジ原稿C16)
に対して画像露光上わ(第2b図)、= 5− その後、正規現像されるが、このとき、現像ローラ(9
)[fl現像バイアス電圧源(llb肋−らネガ−ポジ
の場合とは逆極性の直流バイアス電圧(Vb2)が印加
される。尚、第2d、2a図に示す転写と定着工程は第
1d、le図と同じである。
Positive-Positive Copy σ 2 This is carried out by the method shown in Figures a-e. Basically, it is the same as in the case of negative-positive copying, but as shown in 2nd a @, the uniform charging of the photoreceptor (3) by the corona charger (4) is reverse polarity (positive polarity).
Therefore, the grid electrode (7) is set at vr so that a positive DC bias voltage (Vg2) is applied. Following the uniformly charged photoreceptor, a positive original C16)
After image exposure (Fig. 2b), = 5- then normal development is carried out, but at this time, the developing roller (9
) [fl Development bias voltage source (llb) A DC bias voltage (Vb2) of opposite polarity to that in the negative-positive case is applied.The transfer and fixing steps shown in FIGS. 2d and 2a are performed in steps 1d and 2a. It is the same as the le figure.

このようにネガ−ポジからポジーポジ複写あるいにその
逆への複写方式の選択にあたっては、上述の通り、グリ
ッド電極(7)への直流バイアス電圧(Vgs、Vg+
)の極性の切換え及び現像ローラ(10)へのバイアス
電圧(Vb 、、Vb2)の極性の切換えを必要とする
In this way, when selecting the copying method from negative to positive copying or vice versa, as mentioned above, the DC bias voltage (Vgs, Vg+
) and the polarity of the bias voltage (Vb, , Vb2) to the developing roller (10).

側3図に本発明に係る複写方式制御装置の概要構成発示
し、反時計方向に回動する感光体(3)の周囲Mid帯
電用コロナチャージャ(4)、覗@器(17)、転写用
コロナチャージャ(13)、分離用コロナチャージャ(
18)、クリーナブレード(19)及びイレーザランプ
(20)が設けられている。帯電、用コロナチャージャ
(4)に前述した通りスコロトロンタイプのもので、そ
のコロナ電極(5)に交流電圧源(6)F接続ざする一
方、グリッド電極(7)には複写方式に応じて 6− 正または負極性の直流バイアス電1圧(Vg、、Vg2
)が印加ahるようになっている。このため、グリッド
電、極(7)は直流バイアス電圧源に接続されるが本発
明においてに後でも詳述する通り、現像器(17)の現
像ローラ(9)に接続される現像バイアス電圧源(10
a 、 10b) 全グリッド電極(71の直流バイア
ス電圧源として併用している。
Figure 3 shows the general configuration of the copying method control device according to the present invention, and shows the mid-charging corona charger (4) around the photoreceptor (3) rotating counterclockwise, the telescope (17), and the transfer device. Corona charger (13), isolation corona charger (
18), a cleaner blade (19) and an eraser lamp (20). As mentioned above, the corona charger (4) for charging is of the scorotron type, and its corona electrode (5) is connected to an AC voltage source (6) F, while the grid electrode (7) is connected to a 6- Positive or negative polarity DC bias voltage 1 voltage (Vg, , Vg2
) is applied. For this purpose, the grid electrode (7) is connected to a DC bias voltage source, but as will be detailed later in the present invention, a developing bias voltage source is connected to the developing roller (9) of the developing device (17). (10
a, 10b) Full grid electrode (also used as a DC bias voltage source for 71).

現像器(17)内には攪拌ローラ(21)と現像ローラ
(9)が設けられており、該現@ヨーラ(9)に磁気ブ
ラシ穂を形成して静電潜像を現像する。尚、現像剤とし
でに例えば2成分現像剤が用いられる。該現像ローラ(
9)にネガ−ポジ複写時には正極性の現像バイアス電圧
(”−1)が印加されるように第1の直流現像バイアス
電圧源(10a)F、 またポジーポジ複す 写時には負極性のNりが印加されるように第2現像バイ
アス電圧源(llb)i/?″接続;わている。より具
体的f上紀算1、第2現像バイアス電圧源(10a )
、(10b)ld直列f接紗さトるとともにその間に現
浄ローラ(9)が接続ζtでいる。そして第1@田源(
,10a)の正極側に第1切換スイツチ(Sl)に、第
2雷圧源(10b)の負極側は第2切換スイツチ(S2
)K夫々接続されている。第1、Ii2切換スイッチ(
Sl)、(S2)は夫々接点(a)からら)及び(c)
から(d)あるいはその逆に連動切換えするスイッチで
、また接点(a)と(d)間にはライン(22〕が、接
点(blと(c1間にはライン(23)が並列配線さい
ている。
A stirring roller (21) and a developing roller (9) are provided in the developing device (17), and a magnetic brush tip is formed on the developing roller (9) to develop the electrostatic latent image. Note that, for example, a two-component developer is used as the developer. The developing roller (
9), a first DC developing bias voltage source (10a) F is applied so that a positive developing bias voltage ("-1) is applied during negative-positive copying, and a negative N voltage is applied during positive-positive copying. A second developing bias voltage source (llb) i/?'' connection is applied so that the second developing bias voltage source (llb) is connected. More specifically, the second development bias voltage source (10a)
, (10b) ld is connected in series with f and the current cleaning roller (9) is connected therebetween. And the 1st @ Tagen (
, 10a) is connected to the first changeover switch (Sl), and the negative side of the second lightning pressure source (10b) is connected to the second changeover switch (S2).
) K are connected to each other. 1st, Ii2 selector switch (
SL) and (S2) are contact points (a) to (c) respectively.
It is a switch for interlocking switching from (d) to (d) or vice versa, and a line (22) is wired in parallel between contacts (a) and (d), and a line (23) is wired in parallel between contacts (bl and (c1). There is.

従って第3図に示すように、今、仮に第1切換スイツチ
(S1〕が接点(a)側に、第2切換スイツチ(S2)
が接点(Sl側にあるとき、つまりポジーポジ複写時、
現像ローラ(9)には第2現像バイアス電圧源(10b
)からの正極のバイアス電圧(Vbρが印加ζねる一方
、グリッド電極(7)には第1、第2現像バイアス雷圧
源(Loa)、(10b )からの電圧、即ち(、Vb
l)と(V′b2)の電圧の和が印加これる。こf″l
に対しネガ−ポジ複写時VrU、算1、算2切換スイッ
チ(Sl)、(S2)に夫々接点(b)、(山側に切換
わり、現像ローラ(9) [U第1現便バイアス宵圧源
(Ila)からのバイアス電圧(■ρが印加ざ勤、寸た
グリッド電極(7)π   ゛げ第1、第2現9バイア
ス電圧源(10a’)、(iob)からの(■bI〕と
(Vb2)の和の電圧がライン(22)’を介して印加
さする。
Therefore, as shown in FIG.
When is on the contact point (Sl side, that is, during positive-positive copying,
A second developing bias voltage source (10b) is connected to the developing roller (9).
) is applied to the positive bias voltage (Vbρ), while the voltage from the first and second development bias lightning pressure sources (Loa), (10b) is applied to the grid electrode (7), that is, (, Vb
The sum of voltages l) and (V'b2) is applied. This f″l
On the other hand, during negative-positive copying, VrU, Calculation 1, Calculation 2 changeover switch (Sl), (S2) is connected to contact point (b), (switched to the mountain side, developing roller (9) [U 1st developer bias evening pressure The bias voltage (■ρ from the source (Ila) is applied, the diagonal grid electrode (7) and (Vb2) is applied via line (22)'.

転写用コロナチャージャ(13)は直流高圧電源(12
)に接続され、トナーとに逆極性の電、圧印加によって
転写紙上にトナー像を転写する。分離用コロナチャージ
ャ(18)は転写紙を感光体から分離するためのもので
、前記帯電用コロナチャージャ(4)の交流電圧源(6
)に接続されている。つまり前記帯電用及び分離用コロ
ナチャージャ(4)、(18)は電圧源として単一の交
流電圧源(6)に接続されている。
The transfer corona charger (13) is connected to a DC high voltage power supply (12).
), and the toner image is transferred onto the transfer paper by applying electricity and pressure of opposite polarity to the toner. The separating corona charger (18) is for separating the transfer paper from the photoreceptor, and is connected to the AC voltage source (6) of the charging corona charger (4).
)It is connected to the. That is, the charging and separating corona chargers (4), (18) are connected to a single AC voltage source (6) as a voltage source.

以上の構成において、ポジーポジ複写時には第1、第2
切撲スイツチ(81)、(82) u夫々接点(a)、
(C1側にある。帯電用コロナチャージャ(4)のコロ
ナ電極(5)には交流電圧源(6)からの電圧が印加さ
れるとともにグリッド電極(7)ニ現像バイアス電圧源
(10a) 、(10b)からの(■bL)と(Vb2
)の和の正極電圧CVg、)が印加され、感光体(3)
の表面を略CVg、)に等しい電位に均一帯電する。続
いてポジ原稿に対して画像露光を行い静電潜像を形成(
−1その後、現像器(18)により正規現像を行う。こ
のとき、現像ローラ(10) K U第2現像バイアス
電圧源(llb)からの正9− 極直流バイアス電圧c、vb2)が印加され負り性トナ
ーは画像部(非光照射部)に付着する。こうして現像さ
れた像は直流高圧電源〔12)に接続づわた転写用コロ
ナチャージャ(13) f/rより転写紙に転写される
。続いて帯電用コロナチャージャ(4)と同じ電圧源の
交流電圧源(6)に接続された分離用コロナチャージャ
(18)により転写紙は感光体面より分離され、その後
、定着さtてポジ複写が得られる。感光体は残留トナー
がブレードクリーナ(19) VCより除去、また残留
電荷がイレーザランプ(20)ic除電され反復使用さ
れる。
In the above configuration, during positive-positive copying, the first and second
Cut switch (81), (82) u contact point (a),
(On the C1 side. Voltage from the AC voltage source (6) is applied to the corona electrode (5) of the charging corona charger (4), and the grid electrode (7) and the developing bias voltage source (10a), ( 10b) from (■bL) and (Vb2
) is applied, and the positive electrode voltage CVg, ) is applied to the photoreceptor (3).
uniformly charge the surface to a potential approximately equal to CVg, ). Next, image exposure is performed on the positive original to form an electrostatic latent image (
-1 After that, regular development is performed using the developing device (18). At this time, a positive 9-pole DC bias voltage c, vb2) is applied from the developing roller (10) KU second developing bias voltage source (llb), and the negative toner adheres to the image area (non-light irradiated area). do. The image developed in this way is transferred onto transfer paper by a transfer corona charger (13) f/r connected to a DC high voltage power source [12]. Subsequently, the transfer paper is separated from the photoreceptor surface by a separation corona charger (18) connected to an AC voltage source (6) that is the same voltage source as the charging corona charger (4), and is then fixed and a positive copy is made. can get. The photoreceptor is repeatedly used after residual toner is removed by a blade cleaner (19) and VC, and residual charge is removed by an eraser lamp (20).

次にネガ−ポジ複写時には、第1、第2切控スイツチ(
Sl)、(S2)が連動切換えされ、こi−f/rより
各スイッチに接点(し、(dj側に切換わる。従って帯
電用コロナチャージャ(4)のグリッド電極(7) [
H第1、算2i像バイアス電圧源(10a ’)、(1
0b)からの(Vb、)と(Vb2)の和の負極性の電
圧(Vg、)がライン(22)を介して印加ばr、ぶ7
光体表面を(Vg+)に略等りい電位に帯電する。また
一方、現像ローラ(9)に算1現像バイアス電圧源(1
0a )から負のバイアス電圧10− (■1)が印加メワ、光照射部に対応してトナーが付着
する。その他σポジーポジ複写の場合と同じ、最終的に
ネガ原稿からポジ像が得られる。
Next, when making negative-positive copies, the first and second cut-off switches (
Sl) and (S2) are switched in an interlocking manner, and the contacts (from I-F/R) are switched to the (dj side).Therefore, the grid electrode (7) of the charging corona charger (4)
H 1st, 2i image bias voltage source (10a'), (1
A negative polarity voltage (Vg,), which is the sum of (Vb, ) and (Vb2) from 0b), is applied via line (22) to r, 7
The surface of the light body is charged to a potential approximately equal to (Vg+). On the other hand, the developing roller (9) has a total of 1 developing bias voltage source (1
When a negative bias voltage of 10- (1) is applied from 0a) to 10-1, toner adheres to the light irradiated area. In addition, as in the case of σ-positive copying, a positive image is finally obtained from the negative original.

効  果 以上の説明から明らかなように、本発明に係る複写方式
制御袋#fよれば、構成、制御が簡素であるばかりでな
く現像バイアス電圧源をグリッド電極への印加宵、圧源
としているので極めて安価となる。しかも複写方式の切
換えV?″は特殊で高価なスイッチケ必要としない。更
に、分離用コロナチャージャV?″は帝箱;用コロナチ
ャージャと同じ電圧1jtii、 ?使用でき、構成が
より一層簡素と庁る等、多くの効果を有する。
Effects As is clear from the above explanation, the copying method control bag #f according to the present invention not only has a simple configuration and control, but also uses the developing bias voltage source as a pressure source for applying it to the grid electrode. Therefore, it is extremely cheap. And the copying method switching V? '' does not require a special and expensive switch.Furthermore, the isolation corona charger V?'' has the same voltage as the Teibako corona charger. It has many advantages, such as being easier to use and having a simpler configuration.

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

Fla−e図及び第2a−e図はネガ−ポジ、ポジーポ
ジ複瓦工程ケ示す図、第3図は本発明に係る複写方式制
御装置の概要構成を示す図である。 (4)・帯電用コロナチャージャ、(6)・交流電圧源
、(7)=−グリッド電極、(9)」像ローラ、(10
a)、(10b)・−第1、WQNM像バイアス電源、
(18)・分離用コロナチャージャ、(Sl)、(S2
)・・・第1、第2切換スイツチ。 出願人  ミノルタカメラ株式会社
Fig. Fla-e and Fig. 2a-e are diagrams showing a negative-positive and positive-positive double tile process, and Fig. 3 is a diagram showing a general configuration of a copying method control device according to the present invention. (4)・Charging corona charger, (6)・AC voltage source, (7)=-grid electrode, (9)” image roller, (10
a), (10b) - first, WQNM image bias power supply,
(18)・Separation corona charger, (Sl), (S2
)...First and second changeover switch. Applicant Minolta Camera Co., Ltd.

Claims (1)

【特許請求の範囲】 1 ネガ−ポジ、ポジーポジ複写方式が可能な複写機に
おいて、 交流電圧源に接続されるコロナ電極と直流電圧が印加さ
れるグリッド電極を有しその直流電圧に略等しい電9位
に感光体を帯電する帯電用コロナチャージャと、 感光体上に形成さ勤た静電1潜像を現像するための現像
手段と、 前記グリッド電極と現像手段に接続される算1と第2現
像バイアス電圧源と、 榎茸方式の切換えfより前記現像手段に$1または第2
現像バイアス電圧源佃勤か一方から異なる極性の直流バ
イアス電圧全印加せしぬるとともに、第1と第2胡像バ
イアス雷圧源からの電圧の和fzr異なる極性で前言フ
グリッド電極に印加せLめる切換手段とを備えたことを
特徴とする複写方式2 更に分離用コロナチャージャが
設けられそのコロナ電極は前記交流電館源に接続されて
いることを特徴とする特許請求の範囲第1項記載の複写
方式制御装置。
[Scope of Claims] 1. A copying machine capable of negative-positive and positive-positive copying systems, comprising a corona electrode connected to an AC voltage source and a grid electrode to which a DC voltage is applied, and a voltage 9 approximately equal to the DC voltage. a charging corona charger for charging the photoreceptor to a certain position; a developing means for developing the electrostatic first latent image formed on the photoreceptor; A developing bias voltage source and a switching f of the Enoki mushroom method apply $1 or a second voltage to the developing means.
At the same time, all DC bias voltages of different polarities are applied from one side of the developing bias voltage source, and the sum of the voltages from the first and second bias voltage sources is applied to the aforementioned Fgrid electrode with different polarities. 2. A copying method 2 characterized in that the copying method 2 is further provided with a separating corona charger, the corona electrode of which is connected to the alternating current power source. Copying method control device.
JP57082042A 1982-05-14 1982-05-14 Controlling device of copying method Granted JPS58198056A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57082042A JPS58198056A (en) 1982-05-14 1982-05-14 Controlling device of copying method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57082042A JPS58198056A (en) 1982-05-14 1982-05-14 Controlling device of copying method

Publications (2)

Publication Number Publication Date
JPS58198056A true JPS58198056A (en) 1983-11-17
JPH0343619B2 JPH0343619B2 (en) 1991-07-03

Family

ID=13763458

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57082042A Granted JPS58198056A (en) 1982-05-14 1982-05-14 Controlling device of copying method

Country Status (1)

Country Link
JP (1) JPS58198056A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61290455A (en) * 1985-06-18 1986-12-20 Fujitsu Ltd Electrophotographic recorder
US5398099A (en) * 1992-09-24 1995-03-14 Kabushiki Kaisha Toshiba Image forming apparatus with bias means for preventing toner particles from clouding optical components

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61290455A (en) * 1985-06-18 1986-12-20 Fujitsu Ltd Electrophotographic recorder
US5398099A (en) * 1992-09-24 1995-03-14 Kabushiki Kaisha Toshiba Image forming apparatus with bias means for preventing toner particles from clouding optical components

Also Published As

Publication number Publication date
JPH0343619B2 (en) 1991-07-03

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