JPS63180981A - Printing device - Google Patents
Printing deviceInfo
- Publication number
- JPS63180981A JPS63180981A JP1353687A JP1353687A JPS63180981A JP S63180981 A JPS63180981 A JP S63180981A JP 1353687 A JP1353687 A JP 1353687A JP 1353687 A JP1353687 A JP 1353687A JP S63180981 A JPS63180981 A JP S63180981A
- Authority
- JP
- Japan
- Prior art keywords
- surface potential
- light
- sensor
- erasure
- cold cathode
- 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
- 230000007613 environmental effect Effects 0.000 claims abstract description 7
- 230000008713 feedback mechanism Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 3
- CJPQIRJHIZUAQP-MRXNPFEDSA-N benalaxyl-M Chemical compound CC=1C=CC=C(C)C=1N([C@H](C)C(=O)OC)C(=O)CC1=CC=CC=C1 CJPQIRJHIZUAQP-MRXNPFEDSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 241000207199 Citrus Species 0.000 description 1
- 238000005513 bias potential Methods 0.000 description 1
- 235000020971 citrus fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Exposure Or Original Feeding In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は電子写真方式の印刷装置に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to an electrophotographic printing apparatus.
従来この棟の印刷装置はイレース光量を安定させるため
に、環境特性の良いセンサーを用いた光量フィードバッ
ク機構を付加していた。Previously, the printing equipment in this building had been equipped with a light intensity feedback mechanism using a sensor with good environmental characteristics in order to stabilize the erase light intensity.
上述した従来の印刷装置では環境が変化してもイレース
光量は一定である。そのため、環境にょシ表面電位が変
化する像担持体を用いる場合は表面電位が補正できない
、そのため、環境が変わると、カプリ又は濃度変化をお
こしゃすい欠点がある。In the conventional printing apparatus described above, the amount of erase light remains constant even if the environment changes. Therefore, when using an image carrier whose surface potential changes depending on the environment, the surface potential cannot be corrected, and therefore, when the environment changes, capri or density changes are likely to occur.
本発明の印刷装置はイレースユニットに像担持体の表面
電位の環境変化を補正できる特性を持ったセンサーと、
該センサーを用いた光量フィードバック機構を有してい
る。The printing apparatus of the present invention includes a sensor having a characteristic capable of correcting environmental changes in the surface potential of the image carrier in the erase unit;
It has a light amount feedback mechanism using the sensor.
次に本発明について図面を用いて説明する。 Next, the present invention will be explained using the drawings.
第１図は、本発明の現像プロセスの断面図である。感光
ドラム１の回わシに路光用ＬＥＤへ、ド２、メインチャ
ージャ３、現像ユニット４及びスリーブ５、転写チャー
ジャ６、クリーナブレード７、イレース用冷陰極管８が
配されている。FIG. 1 is a cross-sectional view of the development process of the present invention. A path light LED, a drive 2, a main charger 3, a developing unit 4, a sleeve 5, a transfer charger 6, a cleaner blade 7, and a cold cathode tube 8 for erasing are arranged on the rotating side of the photosensitive drum 1.
イレース管８の回わシに光量センサー用ＣｄＳセル９が
配されている。又、クリーナブレード７でかき落した排
トナーを留めるクリーナタンク１１がある。A CdS cell 9 for a light amount sensor is arranged at the turn of the erase tube 8. Further, there is a cleaner tank 11 that retains the waste toner scraped off by the cleaner blade 7.
メインチャージャ３によシ、感光ドラム表面はｅにチャ
ージされ一定の表面電位Ｖｏに帯電される。ＬＥＤヘッ
ドによ如露光された部分は、帯電がとかれイメージ電位
ｖＩにさがる。この部分にバイアス電位ＶＢ値でマイナ
ス帯電したトナーが、スリーブ５よシトラム表面に付着
する。The main charger 3 charges the surface of the photosensitive drum to e and a constant surface potential Vo. The portion exposed by the LED head is de-charged and drops to the image potential vI. Toner negatively charged at this portion by the bias potential VB value adheres to the sleeve 5 and the citrus surface.
用紙走行メカニズムによシ送られた用紙は転写チャージ
ャ６によシ、プラス側に帯電され、これにマイナス帯電
のトナーが付着する。用紙は、ハロゲン２ンプ１６で加
熱されたヒートローラ１５と、このヒートローラーに一
定の圧力で押し当てられているプレッシャローラ１７の
間を通すことにより、トナーが定着され、排出ロー２１
８．１９によシ、スタッカー（図示せず）にスタックさ
れる。The paper fed by the paper transport mechanism is positively charged by the transfer charger 6, and negatively charged toner is attached to it. The paper is passed between a heat roller 15 heated by a halogen pump 16 and a pressure roller 17 pressed against the heat roller with a constant pressure, so that the toner is fixed on the paper, and the toner is fixed on the paper.
8.19 and stacked on a stacker (not shown).
転写の終ったドラム表面には、一部転写しなかったトナ
ーが付着しておシクリーナブレード７でかき落とす。ド
ラム表面の電位は、露光部と未露光部で差があるため、
冷陰極管８を露光させることによシ、ドラム表面電位を
均一に落とす。これが冷陰極管８の役わシであるが、イ
レース光量の強さで感光ドラム上の表面電位は変動する
。A portion of the toner that has not been transferred adheres to the surface of the drum after the transfer, and is scraped off by the cleaner blade 7. Since there is a difference in potential on the drum surface between exposed and unexposed areas,
By exposing the cold cathode tube 8 to light, the drum surface potential is lowered uniformly. This is the role of the cold cathode tube 8, but the surface potential on the photosensitive drum varies depending on the intensity of the erase light amount.
第２図にイレースユニットの構成をしめす。Figure 2 shows the configuration of the erase unit.
イレースユニットは冷陰極管８と、高圧電源１０によシ
構成されるが、イレース光量を一定にするためＣｄ８セ
ル９があシ、高圧電源の電流をフィードパ、クコントロ
ールしている。The erase unit is composed of a cold cathode tube 8 and a high voltage power supply 10, and in order to keep the amount of erase light constant, a Cd8 cell 9 feeds and controls the current of the high voltage power supply.
イレース光量はＣｄＳセルの抵抗で決まる、従来は環境
による変化の少ないＣｄＳを使っていたが、これでは第
３図の特性を持つ感光ドラムを使う場合は表面電位の変
化±人を補正できずに、カプリ又は濃度変化の原因とな
っていた。The amount of erase light is determined by the resistance of the CdS cell. Conventionally, CdS was used, which does not change much due to the environment, but when using a photosensitive drum with the characteristics shown in Figure 3, it is not possible to compensate for changes in surface potential ± people. , which caused capri or concentration changes.
本発明は、表面電位がイレース光量によシ変わる特性を
利用して、表面電位の変化±人を補正するものである。The present invention utilizes the characteristic that the surface potential changes depending on the amount of erase light to correct the change in surface potential.
第４図の第一象現の様に感光ドラムの表面電位はイレー
ス光量によシ変化するので、第３象現、第４象現の特性
を示すＣｄＳを用いた光量フィードバックを行なう事に
よシ、表面電位を補正できて、カプリ又は濃度変化を防
止できる。As shown in the first quadrant in Figure 4, the surface potential of the photosensitive drum changes depending on the amount of erase light, so by performing light amount feedback using CdS, which shows the characteristics of the third and fourth quadrants. Furthermore, the surface potential can be corrected and capri or concentration changes can be prevented.
以上説明したように本発明はイレースユニットに像担持
体の表面電位の環境変化を補正できる特性を持ったセン
サーを有し、該センサーを用いた光量フィードパ、り機
構を有して、環境に応じてイレース光量を変えることに
よシ、該像担持体の表面電位の環境変化を補正できカプ
リ又は濃度変化を防ぐ効果がある。As explained above, the present invention has a sensor in the erase unit that has the characteristic of correcting environmental changes in the surface potential of the image carrier, and has a light amount feeder mechanism using the sensor to adjust the amount of light according to the environment. By changing the amount of erase light, environmental changes in the surface potential of the image carrier can be corrected, and capri or density changes can be prevented.
第１図は本発明の現像プロセスの断面図、第２図はイレ
ースユニットの構成図、第３図は感光ドラムの特性図、
第４図は本発明の特性図である。
１・・・・・・感光ドラム、２・・・・・・ＬＥＤヘッ
ド、３・・・・・・メインチャージャ、４・・・・・・
現像ユニット、５・・・・・・スリーブ、６・・・・・
・転写チャージャ、７・・・・・・クリーナブレード、
８・・・・・・冷陰極管、９・・・・・・Ｃｄ８セル、
ｌＯ・・・・・・高圧電源、１１・・・・・・クリーナ
タンク、１２・・・・・・フィードローラ、１３．１４
・・・・・・セパレートローラ、１５・・・・・・ヒー
トローラ、１６・・・・・・ヒータ、１７・・・・・・
プレッシャローラ、１８．１９・・・・・・排出ｙｆｉ
２辺
′ｊｆＪ３裂
′ｆｉ４図FIG. 1 is a sectional view of the developing process of the present invention, FIG. 2 is a configuration diagram of the erase unit, and FIG. 3 is a characteristic diagram of the photosensitive drum.
FIG. 4 is a characteristic diagram of the present invention. 1...Photosensitive drum, 2...LED head, 3...Main charger, 4...
Developing unit, 5... Sleeve, 6...
・Transfer charger, 7...Cleaner blade,
8...Cold cathode tube, 9...Cd8 cell,
lO...High voltage power supply, 11...Cleaner tank, 12...Feed roller, 13.14
... Separate roller, 15 ... Heat roller, 16 ... Heater, 17 ...
Pressure roller, 18.19...Discharge yfi
2nd side'jfJ3 fissure'fi4 figure
Claims (1)
ットに像担持体の表面電位の環境変化を補正できる特性
を持ったセンサーを有し、該センサーを用いた光量フィ
ードバック機構を有することを特徴とした印刷装置。A printing apparatus using an electrophotographic method, characterized in that the erase unit has a sensor having a characteristic capable of correcting environmental changes in the surface potential of an image carrier, and a light amount feedback mechanism using the sensor. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1353687A JPS63180981A (en) | 1987-01-22 | 1987-01-22 | Printing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1353687A JPS63180981A (en) | 1987-01-22 | 1987-01-22 | Printing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63180981A true JPS63180981A (en) | 1988-07-26 |
Family
ID=11835875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1353687A Pending JPS63180981A (en) | 1987-01-22 | 1987-01-22 | Printing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63180981A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5406070A (en) * | 1993-12-16 | 1995-04-11 | International Business Machines Corporation | Method and apparatus for scanning an object and correcting image data using concurrently generated illumination data |
| US6198892B1 (en) * | 1999-02-02 | 2001-03-06 | Minolta Co., Ltd. | Image forming apparatus using erase light |
-
1987
- 1987-01-22 JP JP1353687A patent/JPS63180981A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5406070A (en) * | 1993-12-16 | 1995-04-11 | International Business Machines Corporation | Method and apparatus for scanning an object and correcting image data using concurrently generated illumination data |
| US6198892B1 (en) * | 1999-02-02 | 2001-03-06 | Minolta Co., Ltd. | Image forming apparatus using erase light |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1030671C (en) | Image forming apparatus | |
| CN1271476C (en) | Image forming apparatus | |
| JPS6112259B2 (en) | ||
| JP2954593B2 (en) | Image forming control method for image forming apparatus | |
| JPS63180981A (en) | Printing device | |
| US4035071A (en) | Developing process and apparatus for electrophotography | |
| JPS5882282A (en) | Image forming device | |
| JPS57124363A (en) | Drive method for copy density controller | |
| US6055387A (en) | Device and method for electrophotographic image generation | |
| JPS5499632A (en) | Image adjusting method of copying machines | |
| US5897238A (en) | Method of setting position of a corona charger | |
| DE3582451D1 (en) | CONTROL DEVICE FOR ELECTROPHOTOGRAPHIC RECORDING DEVICE. | |
| JP3254235B2 (en) | Electrophotographic process control device | |
| JP2781422B2 (en) | Image density control method | |
| JPS63179382A (en) | Erasing unit | |
| JPS58159552A (en) | Electrophotographic apparatus | |
| JPH0318875A (en) | Printing device | |
| JPH0345237Y2 (en) | ||
| JPH0318877A (en) | Printing device | |
| JP2526127Y2 (en) | Image quality control device in electrophotographic apparatus | |
| JPS63136071A (en) | Control method for light quantity of electrostatic discharging light | |
| JPH0764410A (en) | Transfer/separation device of image forming device | |
| JPS60133474A (en) | Electrophotographic copying machine | |
| JPS60131563A (en) | Electrophotographic printing device | |
| JPH03233580A (en) | Developing roller |