JPS5888770A - Electrophotographic copying machine - Google Patents
Electrophotographic copying machineInfo
- Publication number
- JPS5888770A JPS5888770A JP18691481A JP18691481A JPS5888770A JP S5888770 A JPS5888770 A JP S5888770A JP 18691481 A JP18691481 A JP 18691481A JP 18691481 A JP18691481 A JP 18691481A JP S5888770 A JPS5888770 A JP S5888770A
- Authority
- JP
- Japan
- Prior art keywords
- photosensitive drum
- developer
- voltage
- sleeve
- electrostatic
- 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
- G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
- G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
- G03G15/163—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using the force produced by an electrostatic transfer field formed between the second base and the electrographic recording member, e.g. transfer through an air gap
- G03G15/1635—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using the force produced by an electrostatic transfer field formed between the second base and the electrographic recording member, e.g. transfer through an air gap the field being produced by laying down an electrostatic charge behind the base or the recording member, e.g. by a corona device
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Combination Of More Than One Step In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】 この発明は電子複写装置に関する。[Detailed description of the invention] The present invention relates to an electronic copying device.
従来、電子複写装置においては、感光ドラム上に帯電、
露光の各工程を経て形成された静電潜像に対し現像剤を
付着させトナー像を形成する方法として、非接触現像で
ある所謂ジャンピング方式が知られている。この種の従
来の電子複写装置では、感光ドラム(感光層の保持材)
を接地電位とし、また現像装置等、感光ドラムに対する
周辺装置K対しては交流電圧を印加して感光ドラムと岬
辺装信との間に発生する静電的な作用力により上記トナ
ー像を形成するものである。Conventionally, in electronic copying machines, the photosensitive drum is charged,
A so-called jumping method, which is a non-contact development method, is known as a method of forming a toner image by attaching a developer to an electrostatic latent image formed through various steps of exposure. In this type of conventional electronic copying device, the photosensitive drum (holding material for the photosensitive layer)
is set to the ground potential, and an alternating current voltage is applied to the peripheral devices K for the photosensitive drum such as the developing device, and the above-mentioned toner image is formed by the electrostatic force generated between the photosensitive drum and the Misakibe device. It is something to do.
然るに上述した従来装置では、トナー像の転写率は40
〜60係程度であり、更に効率よく転写できるものが求
められている。また上述したジャンピングの功、像時に
現像剤が非画像部に飛散して画質が低下し、また現像剤
が無駄に消費される欠点がある。However, in the conventional device described above, the toner image transfer rate is 40
60, and there is a need for something that can transfer even more efficiently. Furthermore, despite the above-mentioned jumping, there are disadvantages in that the developer is scattered in non-image areas during imaging, resulting in a decrease in image quality and the developer being wasted.
この発明は上述した事情の下に々さhだものでその目的
とするところは、現像、転写、クリーニング等の各工程
において現像剤の付着または剥離をよシ効果的に行なう
ことができ、画質のよい複写が行え、また現像剤の無駄
もなくなるようにした電子複写装置を提供することであ
る。The present invention was developed under the above-mentioned circumstances, and its purpose is to more effectively adhere or remove developer in each process such as development, transfer, and cleaning, thereby improving image quality. To provide an electronic copying device which can perform good copying and eliminate waste of developer.
以下、図面を参照圧してこの発明の一実施例をarA’
明する。第1図は電子複写装置のを都の構成図である。Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
I will clarify. FIG. 1 is a schematic diagram of the electronic copying apparatus.
図において、感光ドラム1は導電性ドラ− 五2の表面に感光層3が被樫さhて構成される。In the figure, the photosensitive drum 1 is a conductive drum. A photosensitive layer 3 is formed on the surface of the photoreceptor 52.
そしてこの感光ドラム1の図示する周辺位置には上記感
光層3をグラス側に帯電させる正極のコロナ放電器4が
配置さhている。なお、このコロナ数箱′器4にけ直流
電源回路5からの高圧泊流電圧が印加され、暗中におい
てコロナ放電が行わわる。A positive corona discharger 4 for charging the photosensitive layer 3 toward the glass side is arranged around the photosensitive drum 1 as shown in the figure. A high current voltage from the DC power supply circuit 5 is applied to the corona chamber 4, and corona discharge occurs in the dark.
感光ドラム1け図示の如く簡計方向に回転されるが、こ
の回転方向に対し上記コロナ放電器4の先には光路6が
形成されている。この光路6には複写する図示しない原
稿に対し、同様に図示しない光源から発射された光によ
る反射光が導入される。而して原稿の非画像部による反
射光によって上記感光層3の電荷は消滅され、他方、画
像部による反射光によって該感光層3の電荷はそのまま
保持され、静電潜像が形成される。One photosensitive drum is rotated in a simple direction as shown in the figure, and an optical path 6 is formed at the tip of the corona discharger 4 in this rotating direction. Reflected light emitted from a light source (not shown) is introduced into the optical path 6 with respect to an original (not shown) to be copied. The charges on the photosensitive layer 3 are eliminated by the light reflected from the non-image areas of the document, while the charges on the photosensitive layer 3 are retained as they are by the light reflected from the image areas, forming an electrostatic latent image.
上記光路6の先には更に、反時計方向に回転しまた感光
ドラム1に近接しているマグネットブラシ7が配置され
ている。このマグネットブラシ7は現像装置の一部を構
成するもので、現像剤を恩着させトナー像を形成する。A magnet brush 7 is further arranged at the end of the optical path 6, which rotates counterclockwise and is close to the photosensitive drum 1. This magnetic brush 7 constitutes a part of the developing device, and attaches the developer to form a toner image.
即ち、マグネットブラシ7け、所定の着磁を施さねて固
定されている磁気ロール8に対し非磁性材から成るスリ
ーブ9を、反時計方向に回転可能に設けて成り、而して
上記スリーブ9の外周面上には薄く且つ均一に覗像側加
10が形成されている。この視像剤層100覗像剤は例
えば、磁性−成分から成るものが利用される。そして上
記現像剤層10け感光ドラム1の#デ層3表面とけ圧接
せず近挫状態とされており、また万一接触したとしても
極めて弱い接触状態であるものと女っている。That is, a sleeve 9 made of a non-magnetic material is provided so as to be rotatable in a counterclockwise direction with respect to a magnetic roll 8 which is fixed without being magnetized to a predetermined degree. A viewing side addition 10 is formed thinly and uniformly on the outer peripheral surface of the lens. The viewing agent in the viewing agent layer 100 is made of, for example, a magnetic component. The surface of the #D layer 3 of the photosensitive drum 1 with the developer layer 10 does not come into pressure contact and is in a state of near collapse, and even if they do come into contact, it is said to be an extremely weak contact state.
ところでこの発明の電子複写装置の場合、感光ドラム1
と、この感光ドラム1に対する周辺装置、即ち、上記現
像装置等に対して夫々、位相の異なる交#1う圧が印加
されるようになっている。即ち、交流電源11路11の
端子12側は接地され、また端子13側は直流iRイア
ス回路14に接続されている。そして直流バイアス回路
14の出力側は上記直流電源回路5に接触さ九るほか、
集市片15およびドラム軸16を介し感光ドラム1の内
面側に接続されている。この結果、上記感光ドラム1の
内面側には後述する交流電圧■1が印加される。By the way, in the case of the electronic copying apparatus of this invention, the photosensitive drum 1
Then, the pressures of the cross #1 having different phases are applied to the peripheral devices for the photosensitive drum 1, that is, the developing device, etc., respectively. That is, the terminal 12 side of the AC power source 11 path 11 is grounded, and the terminal 13 side is connected to the DC iR ear circuit 14. The output side of the DC bias circuit 14 is in contact with the DC power supply circuit 5.
It is connected to the inner surface of the photosensitive drum 1 via a collector piece 15 and a drum shaft 16. As a result, an AC voltage (1), which will be described later, is applied to the inner surface of the photosensitive drum 1.
上記交流電源回路11の端子12.13にはyにトラン
ス17の1次コイル18が接続古わている。そしてトラ
ンス1702次コイル19の一端側は枦地し、他端側は
隼市片20を介し土Fスリーブ9に接続する。この結果
、スリーブ9には土=S交流電圧v1とは位相が180
度〃なる9流電圧v2が印加さh、る。The primary coil 18 of the transformer 17 is connected to terminals 12 and 13 of the AC power supply circuit 11, which are old. One end of the secondary coil 19 of the transformer 170 is grounded, and the other end is connected to the soil F sleeve 9 via the Hayabusa piece 20. As a result, the sleeve 9 has a phase of 180° with respect to the earth=S AC voltage v1.
A nine-current voltage v2 of 9 degrees is applied.
上目Pマグネットブラシ7の先方には更に感光ドラム1
の感光層3に対向接近して対極カバー24が配設されて
いる。この対極カバー24には直流バイアス回路14を
介し上P交流電圧■1が印加されている。Further ahead of the upper P magnet brush 7 is a photosensitive drum 1.
A counter electrode cover 24 is disposed close to and opposite to the photosensitive layer 3 . An upper P AC voltage (1) is applied to this counter electrode cover 24 via a DC bias circuit 14.
対極カバー24の先方には更に感光ドラム1に対し転写
用のコロナ放電器26が配設されている。A corona discharger 26 for transfer to the photosensitive drum 1 is further disposed in front of the counter electrode cover 24 .
このコロナ放電器26は、感光ドラム1の感光層3に離
間し固守されている一対の絶縁材27a127bと、こ
の一対の絶縁材27a、27b内に 5−
収納さねている山形シールド電極28と、この山形シー
ルド電極28内に収納されているコロナ放物ワイヤ29
a、29bに高圧の直流電圧を印加する直流電源回路3
0とによシ成っている。上記山形シールド電極28の両
側のシールド電極28as28bけ図示の如く対応する
絶縁材27a127bにて一部分を被覆さhlまた中央
のシールド電極280のみけ感光層3に対し上記シール
ド11fi28a、28bより近接している。そして山
形シールド電極28は手記2次コイル19に接続さね1
交流電圧■2を印加されている。This corona discharger 26 includes a pair of insulating materials 27a and 127b that are spaced apart and firmly adhered to the photosensitive layer 3 of the photosensitive drum 1, and a chevron-shaped shield electrode 28 that is housed inside the pair of insulating materials 27a and 27b. , a corona parabolic wire 29 housed within this chevron-shaped shield electrode 28
DC power supply circuit 3 that applies high DC voltage to a and 29b
It is made up of 0. The shield electrodes 28as28b on both sides of the chevron-shaped shield electrode 28 are partially covered with corresponding insulating materials 27a127b as shown, and the central shield electrode 280 is apparently closer to the photosensitive layer 3 than the shields 11fi28a, 28b. . The chevron-shaped shield electrode 28 is connected to the secondary coil 19 with the groove 1
AC voltage ■2 is applied.
Vに手付eコロナ放電器26と感光層3間には給紙部(
図示略)から給紙される用紙7が通過する通路25が形
成されている。したがって用紙がとの通路25を通過す
るときコロナ放電器26によシ用紙に供給さhる電荷に
よシ感光層3土に形成されている可視像に付着している
現像剤が用紙に転写されることになる。A paper feed section (
A passage 25 is formed through which the paper 7 fed from a paper source (not shown) passes. Therefore, when the paper passes through the passage 25, the charge supplied to the paper by the corona discharger 26 causes the developer attached to the visible image formed on the photosensitive layer 3 to be transferred to the paper. It will be transcribed.
次に上記実施例の動作を散開する0、電子複写装置の電
源スィッチをオンすると交流電源口@116一
が動作開始する。この結果、直流バイアス部14および
トランス17に交流電源が供給され、集電片15および
ドラム軸16を介し感光ドラム1の内面側1て、またt
1極カバー24には共に第3図(a)に示す交流電圧v
1が印加さh1他方、トランス17の2次コイル19か
ら出力する第3図(b)の交流、電圧v2が集電片20
を介【7てスリーブ9に、Iだ山形シールド電極28に
直接印加される。而して第3図(a、)、(b)からも
自明なように、交流電圧■1、■2は位相が180#異
なり、捷だ電圧値(1例として)および町1シが共に鼾
り、い関係にある。Next, to explain the operation of the above embodiment, when the power switch of the electronic copying apparatus is turned on, the AC power supply port @116 starts operating. As a result, AC power is supplied to the DC bias section 14 and the transformer 17, and the power is supplied to the inner surface 1 of the photosensitive drum 1 via the current collector piece 15 and the drum shaft 16, and also to the t
The one-pole cover 24 is connected to an AC voltage v shown in FIG. 3(a).
1 is applied h1. On the other hand, the AC voltage v2 in FIG. 3(b) output from the secondary coil 19 of the transformer 17 is
The voltage is applied directly to the sleeve 9 via [7] and to the angled shield electrode 28. Therefore, as is obvious from Fig. 3 (a,) and (b), the phases of AC voltages ■1 and ■2 are 180# different, and the voltage value (as an example) and town 1 are both They snore and have an ugly relationship.
原稿をルl定位置にセットして仲写を開始すると感光ド
ラム1か時開方向に回転開始し、貫たこの感光ドラノ・
1の回転動作に同期してスリーブ9が反峙計力向に回転
開始する。そして感光ドラム1の回転にともなってその
感光層36刀制次、コロナ於實器4が暗中にネ1−いて
行うコロナ数箱′によシゾラス側に帯電さねてし4〈。When you set the original in the normal position and start copying, the photosensitive drum 1 starts rotating in the direction of opening, and the photosensitive drum 1 starts rotating.
In synchronization with the rotational movement of step 1, the sleeve 9 starts to rotate in the opposite direction of force. Then, as the photosensitive drum 1 rotates, the photosensitive layer 36 is charged to the schisolous side by the corona plate 4, which is carried out in the dark.
そしてこのようにしてプラスf111に帯ちさオlた感
光層3は更に、光路6を介し導入される原稿からの反射
光のうち非画像部の反射光によってその電荷を消波され
、他方、画像部の反射光によってその電荷をそのまま保
持さね、この結果、十F感光層3上に原稿の画像に対応
した静電潜像が順次形成される。そしてこの静電潜像は
感光ドラム1の回転にともない更にマグネットブラシ7
の方へ送られていき、現像剤によシ現像されてトナー像
が形成される。In this way, the photosensitive layer 3, which has been tilted to +f111, has its charge further dissipated by the reflected light from the non-image area of the reflected light from the document introduced through the optical path 6, and on the other hand, the image As a result, electrostatic latent images corresponding to the images of the original are successively formed on the 1F photosensitive layer 3. As the photosensitive drum 1 rotates, this electrostatic latent image further spreads to the magnetic brush 7.
The toner image is developed by a developer and a toner image is formed.
ところで上述したように、感光ドラム1の内面側には交
流電圧■1が印加され、捷たスリーブ9には交流電圧v
2が夫々印加されている。このため感光ドラム1とスリ
ーブ9との同期した回転動作にともない、感光ドラム1
とスリーブ9rljlKVi相互に第2図に示す曲@2
2で表わされる相互的々静電力が発生作用することにな
る。即ち、感光ドラム1およびスリーブ90間の対向す
る距離との関連において、最小間隙位置21に近接する
までは相互的な静電力は徐々に大きくな9、そして上記
最小間隙位置21にて最大となるとその後は徐々に小さ
くなる。そしてこの第2図の相互的な静電力は、感光層
3に形成さねた上記静電潜像によるh電力と重畳され、
その合成力の大きさに応じてスリーブ9上のm、(&剤
層10を振動させる。By the way, as mentioned above, the AC voltage (1) is applied to the inner surface of the photosensitive drum 1, and the AC voltage (v) is applied to the twisted sleeve 9.
2 are applied respectively. Therefore, as the photosensitive drum 1 and the sleeve 9 rotate in synchronization, the photosensitive drum 1
and Sleeve 9rljlKVi mutually the song @2 shown in Figure 2
A mutual electrostatic force represented by 2 is generated. That is, in relation to the opposing distance between the photosensitive drum 1 and the sleeve 90, the mutual electrostatic force gradually increases 9 until it approaches the minimum gap position 21, and becomes maximum at the minimum gap position 21. After that, it gradually decreases. This reciprocal electrostatic force in FIG. 2 is superimposed on the h power due to the electrostatic latent image formed on the photosensitive layer 3,
The agent layer 10 on the sleeve 9 is vibrated according to the magnitude of the resultant force.
この紀州、上記合成力の大きさに応じた量の現像剤が静
電潜像に付着し、トナー像が形成されることにiる。In this process, an amount of developer corresponding to the magnitude of the above-mentioned composite force adheres to the electrostatic latent image, and a toner image is formed.
上述した現像工程の動作を第3図を参照して更に説明す
ると、上記交流市、圧v1、v2は第3図(a)、(b
)に示すように位相が180度相異するので、この位相
差によって生ずる静電力の大きさは、第3図(0)に示
す曲線23となる。いま静物、力の作用する方向を、感
光ドラム1側をマイナス、スリーブ9側をプラスとして
表わした場合、上記静電力は第3図(0)にみらnるよ
うに、位相角0〜180度の間はマイナス方向に作用し
、また、180〜360度の間はプラス方向に作用し、
しかも図示のように、減少→増大→減少の変化、ν1」
ち、交流的な変化を示す。したがってこのように交流的
に変化する静電力によって上6C現像剤層10が振動し
、該現像剤層10から飛び出し一〇−
た現像剤粒子は静電潜像に吸着され、トナー像が形成さ
れる。そしていま仮シに非画像部分の計知潜像に対し現
像剤粒子かに量的に付着したとしても、It力の交流1
的な変化により、逆相の#電力による反撥力を受けて直
ちにスリーブ9側に引きもどされ、非画像部分が汚わる
ことがなくなることになり、詰り、画像部と非画像部と
のコントラストの高い、良好な画儒の複写が得られる。The operation of the above-mentioned developing process will be further explained with reference to FIG. 3.
), the phases differ by 180 degrees, and the magnitude of the electrostatic force generated by this phase difference is a curve 23 shown in FIG. 3(0). Now, if we represent a still life and the direction in which the force acts as negative on the photosensitive drum 1 side and positive on the sleeve 9 side, the electrostatic force has a phase angle of 0 to 180, as shown in FIG. 3(0). It acts in the negative direction between 180 and 360 degrees, and it acts in the positive direction between 180 and 360 degrees.
Moreover, as shown in the figure, the change from decrease → increase → decrease, ν1.
In other words, it shows an exchange-like change. Therefore, the upper 6C developer layer 10 vibrates due to the electrostatic force that changes in an alternating current manner, and the developer particles that fly out from the developer layer 10 are attracted to the electrostatic latent image, forming a toner image. Ru. Now, even if some amount of developer particles adhere to the latent image in the non-image area, the It force AC 1
Due to this change, it is immediately pulled back to the sleeve 9 side by the repulsive force caused by the opposite phase # power, and the non-image area is no longer smudged, resulting in clogging and the contrast between the image area and the non-image area. A high quality copy of the image quality can be obtained.
上述のようにして得られたトナー像(可視像)は感光ド
ラム1の回転にともない更に対杉カバー24に対しセ〒
接しながら移動し、コロナ放電器26へ達する。而して
対極カバー24に対する移動中においては、感光ドラム
1と対極カバー24には共に同−交流電、圧■1が印加
されているため、上述した交流的な静電作用が相殺除去
されて上記トナー像はスリーブ9にで生成されたままの
状態を保持される。As the photosensitive drum 1 rotates, the toner image (visible image) obtained as described above is further sewn against the cedar cover 24.
They move while touching each other and reach the corona discharger 26. During the movement relative to the counter electrode cover 24, the same AC voltage and pressure 1 are applied to both the photosensitive drum 1 and the counter electrode cover 24, so the above-mentioned AC electrostatic effect is canceled out and the above-mentioned The toner image is retained on the sleeve 9 as it was generated.
コロナ放電器26の位置に達したトナー像は通路25に
紬昶、され通姻中の用紙(図示略)に転写される。而し
てこの場合、感光ドラム1には交流−l 〇−
?電圧■1が印加され、またコロナ放電器26には交流
電圧■2が印加され、両者の間には子連した第3図(l
に示すn言方が作用している。そしてとの静電力の作用
下においてコロナ放雷器2Gのコロナ族ii*’l/i
’:より用紙が通路25の通過中に帯電されるが、現像
剤の帯電極と同極に静電力が作用した場合において、帯
電した用紙の静電力による吸引作用と、現像剤に対する
感光ドラム1の内面側からの反撥力とによυ用語への現
像剤の転写が行わわる。また上記明像剤の帯市枦と逆極
の静電力が作用した場合においては、コロナ数箱の帯電
による静電的吸着力の方が強いので、一旦用紙上に転写
された明像剤が用紙から剥離されて再び感光ドラム1側
へもどることはない。The toner image that has reached the position of the corona discharger 26 is transferred to the passage 25 and transferred to a sheet of paper (not shown) being transferred. In this case, the photosensitive drum 1 is supplied with alternating current -l 〇-? Voltage 1 is applied, and AC voltage 2 is applied to the corona discharger 26.
The n way of saying shown in the following is in effect. and under the action of the electrostatic force with the corona group ii*'l/i of the corona charger 2G
': The paper is charged while passing through the passage 25, but when an electrostatic force acts on the same polarity as the charging electrode of the developer, the electrostatic force of the charged paper attracts the photosensitive drum 1 to the developer. The developer is transferred to the υ term due to the repulsive force from the inner surface of the . In addition, when the electrostatic force of the opposite polarity to the bright imager is applied, the electrostatic adsorption force due to the charging of the corona box is stronger, so the bright imager once transferred onto the paper is It does not peel off from the paper and return to the photosensitive drum 1 side again.
このようにして交流的に変化する静電力の作用下にトナ
ー像の用紙への転写を行うため、その軒写率は従来装置
に比して大幅に向上(〜、しかも用紙の通路25からの
分離も容易と々るものである。In this way, since the toner image is transferred to the paper under the action of electrostatic force that changes AC, the coverage rate is greatly improved compared to the conventional device (~, and moreover, the transfer from the paper path 25 is Separation is also very easy.
そして転写工程を終えた用紙は排出部(図示略)へ排出
される。なお上記交流電圧の重畳方法は図ない。After the transfer process, the paper is discharged to a discharge section (not shown). Note that the method of superimposing the above AC voltage is not shown.
上記実施例でけトランス1702次コ1ル19から出力
する交流電圧■2をスリーブ9およびコロナ放腎′器2
6へ重し印加したが、可変抵ト1−器を介して印加して
イの印加正圧を一+iJ変とし、常に最適の正圧を供給
するようにしてもよい。舊だ十d1シ実施例では交流電
圧V1.V2の位相差を]80度としたか、この位相差
は、第3図(0)に示す如き交流的な静電力が得らnる
ものであれば任箇である。史に杉7像剤について上記実
施例では磁性−h〜i分のものを使用したが、磁性二成
分等、他の9像剤を用いてもよい。捷た土mU2実施例
の(写工秤の彼に設りられるクリーニング装置に対して
交流1″l、圧を印加すればクリーニング効果が従来よ
り太幅に向上するものでおる。In the above embodiment, the AC voltage 2 output from the secondary coil 19 of the transformer 170 is transferred to the sleeve 9 and the corona discharger 2.
Although a weight is applied to 6, it may be applied via a variable resistor 1 to change the applied positive pressure of 1 to 1+iJ, so that the optimum positive pressure is always supplied. In the embodiment, the AC voltage V1. The phase difference of V2 is set to 80 degrees, but this phase difference is arbitrary as long as an alternating current electrostatic force as shown in FIG. 3(0) can be obtained. Although Sugi 7 image agents having magnetic properties of -h to i were used in the above embodiments, other 9 image agents such as two-component magnetic agents may also be used. If a pressure of 1" AC is applied to the cleaning device installed on the scale of the shredded soil mU2 embodiment, the cleaning effect will be greatly improved compared to the conventional method.
この発明は以上計細に読切したように、ルブしドラムと
、この感光ドラムに幻する玩保装シ勿の届辺装仏との間
に位相差のある交流電圧を印加し、こilにより E<
光ドラムと周辺装置との同に文かI)的に変化する静電
力を発生させて現像剤に作用させ、電子複写を行うよう
にした電子複写装置を提供したから、トナー像の転写率
が従来の40〜60%よシ大幅に向上して高画質の複写
が得られ、また現像剤の消費tが減ってコピー単価が低
下でき、更に非油i像部への現像剤の飛散が少いからク
リーニングが容易となり、したがって定期点検の期間を
長くしても差しつかえなく、人件費を低下で糠る。また
用紙のその通路からの分離も容易と々る別府もある。As described in detail above, this invention applies an alternating current voltage with a phase difference between the lubricating drum and the reachable Buddha of the toy protection system that appears on this photosensitive drum, and E<
Since we have provided an electronic copying device that generates an electrostatic force that varies between the optical drum and the peripheral device and acts on the developer to perform electronic copying, the transfer rate of the toner image can be improved. High-quality copies can be obtained, which is significantly improved from 40 to 60% compared to conventional methods, and developer consumption is reduced, resulting in lower copy unit costs.Furthermore, developer scattering on non-oil image areas is reduced. This makes cleaning easier, so it is no problem to lengthen the period of periodic inspection, which reduces labor costs. There is also Beppu where it is easy to separate the paper from its path.
第1図はこの発明の一実施例の91bの構成図、第2図
は感光ドラムlとスリーブ9間における対向距齢と発生
静電力の関係を示す図、第3図(a)、(b)は夫々、
感光ドラム1と周辺装置に印加する交流電圧v1、v2
の各波形図、(0)は上記交か・電圧v1、v2によっ
て発生する静電力の波形図である。
1・・・・・・感光ドラム、4・・・・・・コロナ放電
器、5・・・・・・面流霜1源回路、6・・・・・・光
路、7・・・・・・マグネ13−
ットブラシ、8・・・・・・磁気ロール、11・・・・
・・交流電源回路、14・・・・・・直済バイアス回路
、15・・・・・・集電片、17・・・・・・トランス
、20・・・・・・集電片、24・・・・・・対罹力・
り−125・・・・・・通路、26・・・・・・コロナ
放電器、28・・・・・・山形シールド電極、30・・
・・・・直流電源回路。
@ 許 出 願 人 カシオ計、W機株式会社アイ・デ
ィ 株式会社
14−
第1図
1,6
第2図
と1
第3図
噛E
+□11小FIG. 1 is a configuration diagram of 91b in an embodiment of the present invention, FIG. 2 is a diagram showing the relationship between the opposing distance between the photosensitive drum l and the sleeve 9 and the generated electrostatic force, and FIGS. 3(a) and (b) ) are respectively,
AC voltages v1 and v2 applied to the photosensitive drum 1 and peripheral devices
(0) is a waveform diagram of the electrostatic force generated by the above-mentioned alternating voltages v1 and v2. 1... Photosensitive drum, 4... Corona discharger, 5... Surface flow frost single source circuit, 6... Optical path, 7...・Magnetic brush, 8...Magnetic roll, 11...
... AC power supply circuit, 14 ... Direct bias circuit, 15 ... Current collector piece, 17 ... Transformer, 20 ... Current collector piece, 24・・・・・・Anti-susceptibility・
-125...Passage, 26...Corona discharger, 28...Chevron shield electrode, 30...
...DC power supply circuit. @ Applicant: Casio Meter, W Machine Co., Ltd. ID Co., Ltd. 14- Fig. 1 1, 6 Fig. 2 and 1 Fig. 3 Kine E +□11 small
Claims (1)
現像剤が付着される感光ドラムと、この感光ドラムの近
傍に配置されて現像、転写、クリーニング等の各工程に
おいて上記感光ドラム、用紙に対する上記現像剤の付着
または剥離を行う周辺装置と、前記感光ドラムおよび周
辺装置間に位相差のある交流電圧を印加する電源装置と
を具備し、前記感光ドラムと周辺装置との間に静電的な
力を周期的に発生させて上記現像剤に作用させることを
特徴とする電子複写装置。A photosensitive drum to which a developer is attached to the electrostatic latent image formed in each process of charging and exposure, and a photosensitive drum that is placed near this photosensitive drum and used in each process such as development, transfer, cleaning, etc. a peripheral device that attaches or peels the developer to or from the peripheral device; and a power supply device that applies an alternating current voltage with a phase difference between the photosensitive drum and the peripheral device, and a power supply device that applies an AC voltage with a phase difference between the photosensitive drum and the peripheral device, and An electronic copying apparatus characterized in that a force is periodically generated to act on the developer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18691481A JPS5888770A (en) | 1981-11-24 | 1981-11-24 | Electrophotographic copying machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18691481A JPS5888770A (en) | 1981-11-24 | 1981-11-24 | Electrophotographic copying machine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5888770A true JPS5888770A (en) | 1983-05-26 |
Family
ID=16196894
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18691481A Pending JPS5888770A (en) | 1981-11-24 | 1981-11-24 | Electrophotographic copying machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5888770A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6468707B1 (en) | 1999-07-06 | 2002-10-22 | Fuji Xerox Co., Ltd. | Image-forming process and image-forming apparatus |
US6589700B2 (en) | 2000-11-24 | 2003-07-08 | Fuji Xerox Co., Ltd. | Image carrier and apparatus and method for recording image using image carrier |
US6650853B1 (en) | 1995-11-27 | 2003-11-18 | Fuji Xerox Co., Ltd. | Image recording apparatus and method with improved image transfer characteristics |
-
1981
- 1981-11-24 JP JP18691481A patent/JPS5888770A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6650853B1 (en) | 1995-11-27 | 2003-11-18 | Fuji Xerox Co., Ltd. | Image recording apparatus and method with improved image transfer characteristics |
US6468707B1 (en) | 1999-07-06 | 2002-10-22 | Fuji Xerox Co., Ltd. | Image-forming process and image-forming apparatus |
US6589700B2 (en) | 2000-11-24 | 2003-07-08 | Fuji Xerox Co., Ltd. | Image carrier and apparatus and method for recording image using image carrier |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0864936A3 (en) | Image forming apparatus | |
JP3238531B2 (en) | Image forming apparatus and method | |
JPH0224679A (en) | Electrostatic latent image developing apparatus | |
JP2980975B2 (en) | Developing device | |
JPH02196266A (en) | Corona transfer prior to selective transfer subjected to potical processing for trilevel xerography | |
JPS61165764A (en) | Electronic photo process | |
JPS5888770A (en) | Electrophotographic copying machine | |
JPS6235109B2 (en) | ||
JPH02123379A (en) | Development method and apparatus which does not develop rim of photosensitive body | |
JPS641015B2 (en) | ||
JPS6022170A (en) | Cleaning device of electrophotographic copying machine | |
JP3146272B2 (en) | Image forming method | |
JP3524398B2 (en) | Image forming device | |
JPH0121319Y2 (en) | ||
JPS6217224B2 (en) | ||
JPH08123196A (en) | Developing device used in common with cleaning | |
JPS5921035B2 (en) | Electrostatic latent image developing device | |
JP3463830B2 (en) | Electrophotographic device using charged brush | |
JP3157154B2 (en) | Image forming method | |
JP3163096B2 (en) | Image forming method | |
JPS6014264A (en) | Electrostatic latent image developing device | |
JPH0666037B2 (en) | Cleaning device for electrophotographic copying machine | |
JPS60254171A (en) | Image forming device | |
JP2004117672A (en) | Image forming apparatus using positively electrifying type reversal developing method | |
JPH07295352A (en) | Image forming device |