JPS62269165A - Electrophotographic printing device - Google Patents
Electrophotographic printing deviceInfo
- Publication number
- JPS62269165A JPS62269165A JP61111884A JP11188486A JPS62269165A JP S62269165 A JPS62269165 A JP S62269165A JP 61111884 A JP61111884 A JP 61111884A JP 11188486 A JP11188486 A JP 11188486A JP S62269165 A JPS62269165 A JP S62269165A
- Authority
- JP
- Japan
- Prior art keywords
- printing
- density
- sensor
- value
- ground
- 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
- 230000007547 defect Effects 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 9
- 230000003068 static effect Effects 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 3
- 108091008695 photoreceptors Proteins 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
- Dot-Matrix Printers And Others (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
- Laser Beam Printer (AREA)
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は電子写真印刷装置の構造に関するものである。[Detailed description of the invention] [Industrial application field] The present invention relates to the structure of an electrophotographic printing device.
［従来の技術］
従来、この種の電子写真印刷装置は第１図に示すように
感光体１の周囲に配設された主帯電器２゜光源部３．レ
ンズ群４．現像器５．転写器６．用紙搬送部７．清掃器
８．除電器９等からなる一連の電子写真プロセスを行う
部分と、転写器６で用紙１０上に転写されたトナー１１
を用紙に固定させる定着器から構成されている。[Prior Art] Conventionally, this type of electrophotographic printing apparatus has a main charger 2, a light source section 3, and a main charger 2 disposed around a photoreceptor 1, as shown in FIG. Lens group 4. Developing device5. Transfer device6. Paper transport section 7. Cleaner 8. A part that performs a series of electrophotographic processes, including a static eliminator 9, etc., and a part that performs a series of electrophotographic processes, including a static eliminator 9, etc., and a part that performs a series of electrophotographic processes, including a static eliminator 9, etc., and a part that performs a series of electrophotographic processes, including a static eliminator 9, etc.
It consists of a fixing device that fixes the paper to the paper.
［発明が解決しようとする問題点］
上記の印刷装置の現像方式としてはトナーとキャリアと
を混合した現像剤（デベロッパ）１２による二成分現像
方式が多い。この場合、トナーとキャリアとの混合比率
が狂うと、用紙の地肌汚れ或いはカブリによる画像不良
が生じることがあった。[Problems to be Solved by the Invention] The developing method of the above-mentioned printing apparatus is often a two-component developing method using a developer 12 containing a mixture of toner and carrier. In this case, if the mixing ratio of toner and carrier is out of order, image defects may occur due to background stains or fog on the paper.
本発明の目的は画像不良の監視を行う電子写真印刷装置
を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide an electrophotographic printing apparatus that monitors image defects.
［問題点を解決するための手段］
本発明は用紙の地肌の濃度を測定するセンサと印刷前の
用紙の地肌の初期濃度値を記憶し、初期濃度値に対する
該センサが測定した印刷後の用紙の地肌の濃度値の大小
を検知する比較検知器とを有することを特徴とする電子
写真印刷装置でおる。[Means for Solving the Problems] The present invention includes a sensor that measures the density of the background of paper, an initial density value of the background of the paper before printing, and a sensor that measures the density of the background of the paper before printing. and a comparison detector for detecting the magnitude of the density value of the background.
［実施例］
次に本発明の実施例について図面を参照して説□明する
。[Example] Next, an example of the present invention will be described with reference to the drawings.
第１図に示す電子写真印刷装置は感光体１の周囲に配設
させた主帯電器２、主にレーザである光源部３、光源か
らの光を適正な形状にするレンズ群４、感光体１にトナ
ー１１を付着させる現像器５、感光体１上のトナー像を
用紙１０に転写する転写器６、用紙１０を感光体１の周
速度と同じ速度で送る用紙搬送部７と、感光体１の清掃
を行う清掃器８及び除電器９により一連の電子写真プロ
セスを行う。The electrophotographic printing apparatus shown in FIG. 1 includes a main charger 2 disposed around a photoreceptor 1, a light source section 3 which is mainly a laser, a lens group 4 that shapes the light from the light source into an appropriate shape, and a photoreceptor 1. a developing device 5 that attaches toner 11 to the photoconductor 1; a transfer device 6 that transfers the toner image on the photoconductor 1 onto the paper 10; a paper transport section 7 that conveys the paper 10 at the same speed as the circumferential speed of the photoconductor 1; A series of electrophotographic processes are performed using a cleaning device 8 and a static eliminator 9, which perform the first cleaning.
この種の印刷装置に多用される現像方式は二成分現像方
式であり、印字量に応じて消費したトナーを補給する必
要がある。−補給すべきトナー量は用紙左端の非印字エ
リアに印刷したマーク１４の反射濃度をトナーマークセ
ンサ１３により検知することで行う。第２図に示すよう
にこのマークは１頁に１ヶ印字してこの反射濃度を測定
する。The developing method often used in this type of printing apparatus is a two-component developing method, and it is necessary to replenish consumed toner according to the amount of printing. - The amount of toner to be replenished is determined by using the toner mark sensor 13 to detect the reflection density of the mark 14 printed in the non-printing area at the left end of the paper. As shown in FIG. 2, one mark is printed on each page and the reflection density is measured.
本発明はトナーマークセンサ１３をマーク１４間の用紙
１０の地肌１０ａの濃度を測定するセンサとして用い、
このトナーマークセンサ１３の出力値を比較検知器１５
に入力し、比較検知器１５により印刷前後の用紙１０の
地肌１０ａの濃度比較を行うようにしたものである。す
なわち、第２図、第３図に示すように印刷前の用紙１０
の地肌１０ａの濃度をセンサ１３により測定し、その値
を初期濃度値として比較検知器１５に記憶させる。そし
て、印刷後の用１紙１０のマーク１４間の地肌（非印刷
部分＞１０ａの濃度をセンサ１３により測定し、その出
力値を比較検知器１５に入力する。比較検知器１５は印
刷後の濃度値を初期濃度値と比較演算し、この演算結果
が一定”値内にあればカブリによる印字不良は起きてい
ないと判断し、もし印刷後の濃度値が初期濃度値と異っ
ていたときはカブリによる印字不良が発生したものと判
断する。この比較検知器１５の出力を受けて印刷装置の
動作を一時中断させる。これにより、用紙の印字不良が
防止されることとなる。The present invention uses the toner mark sensor 13 as a sensor for measuring the density of the background 10a of the paper 10 between the marks 14,
A detector 15 compares the output value of this toner mark sensor 13.
The comparison detector 15 compares the density of the background 10a of the paper 10 before and after printing. That is, as shown in FIGS. 2 and 3, the paper 10 before printing
The density of the background 10a is measured by the sensor 13, and the value is stored in the comparison detector 15 as an initial density value. Then, the density of the background (non-printed area>10a) between the marks 14 of the first sheet 10 after printing is measured by the sensor 13, and the output value is input to the comparison detector 15. The density value is compared and calculated with the initial density value, and if the calculation result is within a certain value, it is determined that there is no printing defect due to fog, and if the density value after printing is different from the initial density value. It is determined that a printing defect due to fogging has occurred.The operation of the printing device is temporarily interrupted in response to the output from the comparison detector 15.This prevents printing defects on the paper.
［発明の効果］
本発明は以上説明したように印刷前後の用紙の地肌の濃
度値を測定し、その濃度値の大小を検知するようにした
ので、その検知結果に基いてカブリによる印字不良が起
きたとき印字動作を停止させ、不良のデータの発生を未
然に防止できる効果を有するものである。[Effects of the Invention] As explained above, the present invention measures the density value of the background of paper before and after printing and detects the magnitude of the density value, so based on the detection result, printing defects due to fog can be detected. This has the effect of stopping the printing operation when this happens, thereby preventing the occurrence of defective data.
第１図は本発明に係る電子写真式印刷装置を示す概略図
、第２図は第１図の主要部を拡大した斜視図、第３図は
センサの出力を比較するブロック図である。
１・・・感光体 ２・・・帯電器３・・・光
源部 ４・・・レンズ群５・・・現像器
６・・・転写器７・・・用紙搬送部 ８
・・・清掃部９・・・除電器 １０・・・用
紙１１・・・トナー １２・・・現像剤１３
・・・トナーマークセンサ
１４・・・トナーマークFIG. 1 is a schematic diagram showing an electrophotographic printing apparatus according to the present invention, FIG. 2 is an enlarged perspective view of the main part of FIG. 1, and FIG. 3 is a block diagram for comparing sensor outputs. 1...Photoconductor 2...Charger 3...Light source section 4...Lens group 5...Developer
6...Transfer device 7...Paper transport section 8
... Cleaning section 9 ... Static eliminator 10 ... Paper 11 ... Toner 12 ... Developer 13
... Toner mark sensor 14 ... Toner mark
Claims (1)
紙の地肌の初期濃度値を記憶し、初期濃度値に対する該
センサが測定した印刷後の用紙の地肌の濃度値の大小を
検知する比較検知器とを有することを特徴とする電子写
真印刷装置。(1) A sensor that measures the density of the background of paper and the initial density value of the background of the paper before printing are stored, and the magnitude of the density value of the background of the paper after printing measured by the sensor relative to the initial density value is detected. An electrophotographic printing device comprising: a comparison detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61111884A JPS62269165A (en) | 1986-05-16 | 1986-05-16 | Electrophotographic printing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61111884A JPS62269165A (en) | 1986-05-16 | 1986-05-16 | Electrophotographic printing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62269165A true JPS62269165A (en) | 1987-11-21 |
Family
ID=14572563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61111884A Pending JPS62269165A (en) | 1986-05-16 | 1986-05-16 | Electrophotographic printing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62269165A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6490432A (en) * | 1987-09-30 | 1989-04-06 | Mita Industrial Co Ltd | Concentration regulating device for copying machine |
| JPH0315867A (en) * | 1989-05-22 | 1991-01-24 | Xerox Corp | Copier with background monitor |
| JP2018112636A (en) * | 2017-01-11 | 2018-07-19 | コニカミノルタ株式会社 | Image forming apparatus, image processing apparatus, and image processing method |
| JP2020052166A (en) * | 2018-09-26 | 2020-04-02 | 株式会社リコー | Image formation device |
| JP2021018331A (en) * | 2019-07-19 | 2021-02-15 | キヤノン株式会社 | Image forming apparatus |
-
1986
- 1986-05-16 JP JP61111884A patent/JPS62269165A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6490432A (en) * | 1987-09-30 | 1989-04-06 | Mita Industrial Co Ltd | Concentration regulating device for copying machine |
| JPH0315867A (en) * | 1989-05-22 | 1991-01-24 | Xerox Corp | Copier with background monitor |
| JP2018112636A (en) * | 2017-01-11 | 2018-07-19 | コニカミノルタ株式会社 | Image forming apparatus, image processing apparatus, and image processing method |
| JP2020052166A (en) * | 2018-09-26 | 2020-04-02 | 株式会社リコー | Image formation device |
| JP2021018331A (en) * | 2019-07-19 | 2021-02-15 | キヤノン株式会社 | Image forming apparatus |
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