JPS5843483A - Controller for eraser function of electrophotographic copier - Google Patents
Controller for eraser function of electrophotographic copierInfo
- Publication number
- JPS5843483A JPS5843483A JP56141663A JP14166381A JPS5843483A JP S5843483 A JPS5843483 A JP S5843483A JP 56141663 A JP56141663 A JP 56141663A JP 14166381 A JP14166381 A JP 14166381A JP S5843483 A JPS5843483 A JP S5843483A
- Authority
- JP
- Japan
- Prior art keywords
- eraser
- photoreceptor
- surface potential
- function
- controller
- 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
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/06—Eliminating residual charges from a reusable imaging member
- G03G21/08—Eliminating residual charges from a reusable imaging member using optical radiation
Landscapes
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、帯電器により一様帯電された感光体の画像
領域外の電荷を除去するイレーザの機能を制御する電子
写真複写機のイレーザ機能＼忙
劃−装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an eraser function/busy device for an electrophotographic copying machine that controls the function of an eraser that removes charges outside the image area of a photoreceptor that is uniformly charged by a charger.
電子写真複写機においては、感光体を帯電器により一様
帯電させて感光性を与え、これに原稿の像を投影露光す
ることにより、光の当った部分は除電され１文字や絵等
の黒色部は除電され −ないことにより静電潜像
が形成される。これ・をトナーにより現像する。ことに
よりトナー像として可視化され、転写紙に転写し、定着
することによりコピーが一完了する。In an electrophotographic copying machine, a photoreceptor is uniformly charged with a charger to give it photosensitivity, and by projecting and exposing the image of the original onto the photoreceptor, the portion that is hit by the light is neutralized and the black color of a single letter or picture is removed. An electrostatic latent image is formed because the area is not neutralized. Develop this with toner. This makes it visible as a toner image, which is transferred to transfer paper and fixed, thereby completing the copy.
さて、感光体上の画像領域外では露・光されないため、
帯電器で一様帯電された感光体の電荷が除去されず、そ
の！マ税像部を通過する−と゛この部分に−は一面に・
・トナーが付着し、トナーが無駄に消費、されるの、み
ならず、装置やコピーの汚染の原個にもなる。Now, since areas outside the image area on the photoreceptor are not exposed to light,
The charge on the photoconductor, which was uniformly charged by the charger, was not removed, and that! As you pass through the tax statue section, you will see a wide area of
- Toner adheres to the toner, which not only wastes and wastes the toner, but also becomes the source of contamination of the equipment and copying equipment.
そこで感光体の画像領域外の電荷を除去するために帯電
−９４二続いてイレーザ（部分除電“番）を設は−るこ
、とが行なわれている。帯電した感・光体を除電・する
Ｊ＝は光Ｉ！−照射すれば・よく、イレ、、−ザとルで
は従来より例えばＬ Ｅ Ｄ 、（発光ダイオード）ア
”レイ等の発光体が用いられている。Therefore, in order to remove the charge outside the image area of the photoreceptor, a charge-942 is followed by an eraser (partial charge removal). It is sufficient to irradiate the J= with light I!, and conventionally, light emitters such as LEDs and (light emitting diode) arrays have been used in the field.
しかし、従来のイレーザに・おいては、例え、ばしＥＤ
・の光量を最初に一定値に設定しており一環境の変化や
、部品のばらつき１ＭＬＥＤの光量の経時的変化等のた
め、該イレー、ザにょる除電後の感光体の表面電位が変
化する欠点があったこの発明は、従来の電子写真複写機
のイレーザの上述の欠点にがんがみ、イレーザにょる除
電後の感光体表面電位が常に所定の値になる如く、イレ
ーザの機能を制御する装置を提供すること全目的とする
。However, in conventional erasers, for example,
・The light intensity is initially set to a constant value, but due to changes in the environment, variations in parts, and changes over time in the light intensity of the 1M LED, the surface potential of the photoreceptor after static electricity removal may change due to changes in the environment, variations in parts, etc. This invention addresses the above-mentioned drawbacks of the eraser of conventional electrophotographic copying machines, and controls the function of the eraser so that the surface potential of the photoreceptor always remains at a predetermined value after static electricity is removed by the eraser. The overall purpose is to provide a device that
この目的は、本発明にしたがい、イレーザによる除電後
の感光体表面電位検知手段を設は該検知手段の検知信号
により上記イレーザの機能を制御することによゆ達成さ
れる。This object is achieved in accordance with the present invention by providing means for detecting the surface potential of the photoreceptor after static elimination by the eraser and controlling the function of the eraser based on a detection signal from the detecting means.
以下、本発明をその実施例を示す図面にもとすいて詳細
に説明する。Hereinafter, the present invention will be explained in detail with reference to drawings showing embodiments thereof.
第１図は１本発明を適用した電子写真複写機の感光体ド
ラム及びその周辺分示す図である。FIG. 1 is a diagram showing a photosensitive drum and its surroundings of an electrophotographic copying machine to which the present invention is applied.
感光体ドラム１の周囲には、矢印で示すその回転方向の
順に、除電器、−熱帯電器３、イレーザ４、表面電位上
ンサ５、現像器６、給紙ガイド板７、転写帯電器８１分
離ベルト９、クリーニング装置１０が配設されている。Around the photosensitive drum 1, in the order of rotation direction indicated by the arrow, there are a static eliminator, a tropical electric device 3, an eraser 4, a surface potential sensor 5, a developing device 6, a paper feed guide plate 7, and a transfer charger 81. A belt 9 and a cleaning device 10 are provided.
露先々学系１１；：よる感光体１への画像露光は、上記
の表面電位上ン＋５と現像器６の間の位置で行なわれる
。Image exposure of the photoreceptor 1 by the exposure point-to-point system 11 is performed at a position between the above-mentioned surface potential +5 and the developing device 6.
上記の各手段により、前述せる公知の電子写真プ゛ロ七
スにより、感光体ドラム１上にトナー像が形成され、給
紙部より給紙ガイド板７を経て感光体ドラム１に給送さ
れた転写紙Ｓにトナー像が転写され１分離ベルト９によ
り分離された後定着されてコピーが完了する。By each of the above-mentioned means, a toner image is formed on the photoreceptor drum 1 by the well-known electrophotographic process described above, and the toner image is fed from the paper feed section to the photoreceptor drum 1 via the paper feed guide plate 7. The toner image is transferred onto the transfer paper S, separated by a one-separation belt 9, and then fixed, completing the copying.
さて、感光体上の画像領域外の電荷はイレーザ４により
除電され、続いて設けられた表面電位上ンサ５により感
光体表面電位が検知される。Now, the charges outside the image area on the photoreceptor are eliminated by the eraser 4, and then the surface potential of the photoreceptor is detected by the surface potential sensor 5 provided.
イレーザ４の機能（例えばイレーザがＬＥＤプレイ等の
発光体である場合はその光量）はその検知信号にもとず
いて、！８光体表面−電位が常に一定になるように制御
され・る。The function of the eraser 4 (for example, the amount of light if the eraser is a light emitter such as an LED play) is based on the detection signal! 8-photon surface - Controlled so that the potential is always constant.
：
第２１はその制御回路の一例そ示すものであって、前記
の表−電位センサ５の出力Ｗｅは増幅番１２により増幅
される。増幅された電圧Ｖｃと基準電圧Ｖ！との差が増
幅器１３によって増幅されＶｄとなる。この時図示の回
路においてＲ３＝ Ｒ５。: No. 21 shows an example of the control circuit, in which the output We of the above-mentioned front potential sensor 5 is amplified by amplification number 12. Amplified voltage Vc and reference voltage V! The difference between the two is amplified by the amplifier 13 and becomes Vd. At this time, R3=R5 in the illustrated circuit.
”Ｒ４＝Ｒ’６ならば、Ｖｄ Ｍ−Ｒ６／Ｒ５（Ｖｃ
−Ｖｉ ｌとして表わされる。ダイオ−下Ｄ１と電解コ
ンデンサｃ１によってＶｄはＶｆとしてホールド・され
る。 ＳＷＩはイレーザ４゛の動作タイミングを決めて
おり、 ＳＷＩオン時トランジスタ ＴＲＩのベースに
はＶ「が掛りオン状態１二なる８トランジスタ ＴＲＩ
オン；二でトランジスタ ＴＲＲもオンとなり、イレー
ザ４が動作する。"If R4=R'6, then Vd M-R6/R5(Vc
-Vil. Vd is held as Vf by the lower diode D1 and the electrolytic capacitor c1. The SWI determines the operation timing of the eraser 4. When the SWI is on, V' is applied to the base of the transistor TRI.
On: At second, transistor TRR is also turned on, and the eraser 4 operates.
今、イレーザ４による除電後の感光体１の画像領域外の
表□面電位が所定値よりも低（・場合□は表面電位上ン
サ５の出力Ｗｅが低く、シたがってＶｃ、ｌｄも低くな
り、イレーザ４′のＬ Ｅ、Ｄに流れる電流は少なくな
り、ＬＥＤの光量は減少する逆にイレーザ４による除電
後の感光体の画像領域外の表面電位が所定値よりも高い
場合は、表面電位上ンサ５の出力Ｗｅが高＜ 、 Ｖｃ
、 Ｖｄも高くなゆ、イレーザ４のＬ Ｅ Ｄ’ｌ：流
れる電流は多くなり、ＬＥＤの光量が増加する。Now, the surface potential outside the image area of the photoreceptor 1 after static elimination by the eraser 4 is lower than a predetermined value (in case □, the output We of the sensor 5 is low due to the surface potential, and therefore Vc and ld are also low). As a result, the current flowing through L E and D of the eraser 4' decreases, and the amount of light from the LED decreases.Conversely, if the surface potential outside the image area of the photoreceptor after static electricity removal by the eraser 4 is higher than a predetermined value, the surface When the output We of the potential upper sensor 5 is high < , Vc
, Vd is also high, so the current flowing through the eraser 4 increases, and the amount of light from the LED increases.
以上の如く制御されることによって、感光体の画像領域
外の表面電位を常に所定の値にすることが可能となる゛
。By controlling as described above, it is possible to always maintain the surface potential of the photoreceptor outside the image area at a predetermined value.
なお、ＬＥＤ等の発光体によらないイレーザの場合にも
表面電位上ンサの出力によりイレーザの機能そ制御する
ことにより、同様の効果が得られる。Note that even in the case of an eraser that does not rely on a light emitting body such as an LED, the same effect can be obtained by controlling the function of the eraser using the output of a surface potential sensor.
以上の如く、本発明によれば簡単な構成で感光体の画像
領域外の表面電位を常に一定に保持することができる。As described above, according to the present invention, the surface potential of the photoreceptor outside the image area can always be kept constant with a simple configuration.
第１図は本発明を適用した複写機の実施例め感光体及び
その周辺の配置を示す図式図、第２図はそのイレーザ機
能制御手段の回路図である１・・・・感光体 ３・・・
・帯電＠ ４・・・・イレーザ５・・・・感光体表面電
位検知手段FIG. 1 is a schematic diagram showing the arrangement of a photoreceptor and its surroundings in an embodiment of a copying machine to which the present invention is applied, and FIG. 2 is a circuit diagram of its eraser function control means.1... Photoreceptor 3.・・・
・Charging @ 4...Eraser 5...Photoconductor surface potential detection means
Claims (1)
を除去するイレーザの機能な制御する電子写真複写機の
イレーザ機能制御装置において、上記イレーザによる除
電後の感光体表面電位検知手段と７、該検、知手段の検
知信号により上記イレー・ザの機能、を制御する手段と
倉有することを特徴とするイレーザ機能制御装置。 ・In an eraser function control device for an electrophotographic copying machine that controls the function of an eraser that removes charges outside the image area of a photoreceptor uniformly charged by a charger, the photoreceptor surface potential detection means after static elimination by the eraser; An eraser function control device comprising means for controlling the function of the eraser based on the detection signal of the detection means.・
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56141663A JPS5843483A (en) | 1981-09-10 | 1981-09-10 | Controller for eraser function of electrophotographic copier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56141663A JPS5843483A (en) | 1981-09-10 | 1981-09-10 | Controller for eraser function of electrophotographic copier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5843483A true JPS5843483A (en) | 1983-03-14 |
Family
ID=15297276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56141663A Pending JPS5843483A (en) | 1981-09-10 | 1981-09-10 | Controller for eraser function of electrophotographic copier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5843483A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60168172A (en) * | 1984-02-10 | 1985-08-31 | Canon Inc | Picture recording device |
| JPH0253912A (en) * | 1988-08-17 | 1990-02-22 | Kanebo Ltd | Acrylic synthetic fiber and production thereof |
| JP2009508624A (en) * | 2005-09-21 | 2009-03-05 | エソテリック・ゴルフ・テクノロジー・インターナショナル・アクチボラゲット | Golf putting training equipment |
-
1981
- 1981-09-10 JP JP56141663A patent/JPS5843483A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60168172A (en) * | 1984-02-10 | 1985-08-31 | Canon Inc | Picture recording device |
| JPH0253912A (en) * | 1988-08-17 | 1990-02-22 | Kanebo Ltd | Acrylic synthetic fiber and production thereof |
| JP2009508624A (en) * | 2005-09-21 | 2009-03-05 | エソテリック・ゴルフ・テクノロジー・インターナショナル・アクチボラゲット | Golf putting training equipment |
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