JPH02142852U - - Google Patents
Info
- Publication number
- JPH02142852U JPH02142852U JP5185289U JP5185289U JPH02142852U JP H02142852 U JPH02142852 U JP H02142852U JP 5185289 U JP5185289 U JP 5185289U JP 5185289 U JP5185289 U JP 5185289U JP H02142852 U JPH02142852 U JP H02142852U
- Authority
- JP
- Japan
- Prior art keywords
- toner
- amount
- control
- detection sensor
- developing device
- 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
- 238000001514 detection method Methods 0.000 claims description 10
- 108091008695 photoreceptors Proteins 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
Description
第１図は本考案を適用した画像形成装置の概略
構成説明図、第２図は制御ブロツク図、第３図は
光反射式濃度検出センサと感光体上の基準画像と
の対応関係を示す説明図、第４図ａ，ｂは原稿ス
ケールを兼ねる検出基準板の構成説明図、第５図
はパターン濃度検出センサの出力とトナー補給ロ
ーラの動作を示すタイミング図、第６図はパター
ン濃度検出センサ出力の変動例を示す図、第７図
は本考案によるトナー濃度制御を実現するための
制御手順を示すフローチヤート、第８図はトナー
補給制御のサブルーチンを示すフローチヤートで
ある。
１…圧板、２…コンタクトガラス、３…原稿、
４…ランプ、１４…帯電チヤージヤ、１６…感光
体ドラム、１７…現像装置、２０…給紙カセツト
、２２…転写チヤージヤ、２４…クリーニングユ
ニツト（ブレード及びブラシ）、２５…光反射式
濃度検出センサ、２６…定着ユニツト、１８…ト
ナータンク、１８ａ…現像ローラ、１９…トナー
ホツパー、１９ａ…トナー補給ローラ、３０…原
稿スケール、３１…検出基準板（基準パターン）
。
Fig. 1 is a schematic configuration diagram of an image forming apparatus to which the present invention is applied, Fig. 2 is a control block diagram, and Fig. 3 is an explanation showing the correspondence between the light reflection type density detection sensor and the reference image on the photoreceptor. Figures 4a and 4b are explanatory diagrams of the configuration of the detection reference plate that also serves as a document scale, Figure 5 is a timing diagram showing the output of the pattern density detection sensor and the operation of the toner replenishment roller, and Figure 6 is the pattern density detection sensor. FIG. 7 is a flowchart showing a control procedure for realizing toner concentration control according to the present invention, and FIG. 8 is a flowchart showing a subroutine for toner replenishment control. 1...pressure plate, 2...contact glass, 3...original,
4...Lamp, 14...Charging charger, 16...Photoconductor drum, 17...Developing device, 20...Paper feed cassette, 22...Transfer charger, 24...Cleaning unit (blade and brush), 25...Light reflection type density detection sensor, 26...Fixing unit, 18...Toner tank, 18a...Developing roller, 19...Toner hopper, 19a...Toner supply roller, 30...Document scale, 31...Detection reference plate (reference pattern)
.
Claims (1)
上に照射して結像した静電潜像を現像装置のトナ
ーによって現像して得た可視像の濃度レベルを検
出する光反射式濃度検出センサと、該検出センサ
によって検出された検出レベルに基づいて該現像
装置から感光体へのトナー供給量の制御を行う制
御部を備え、前記トナー供給量の制御を該現像装
置中のトナー補給ローラの動作を制御することに
よって行う画像形成装置において、 前記制御部は、前記光反射式濃度検出センサの
出力の変動量が予め定められた許容変動値を越え
た場合に前記トナー補給量の制御を中止するとと
もに、各一回のコピー毎に所定量のトナーをトナ
ータンク内へ供給するように前記トナー補給ロー
ラの動作を制御することを特徴とするトナー補給
制御装置。[Claim for Utility Model Registration] The density level of a visible image obtained by developing an electrostatic latent image formed by irradiating reflected light from a fixed reference pattern onto a photoconductor with toner in a developing device. A light reflection type density detection sensor for detecting the density, and a control unit for controlling the amount of toner supplied from the developing device to the photoreceptor based on the detection level detected by the detection sensor, and controlling the amount of toner supplied to the photoreceptor. In an image forming apparatus that controls the operation of a toner replenishment roller in a developing device, the control section controls the control unit to control the amount of variation in the output of the light reflection type density detection sensor when it exceeds a predetermined allowable variation value. A toner replenishment control device, characterized in that the control of the toner replenishment amount is stopped and the operation of the toner replenishment roller is controlled so as to supply a predetermined amount of toner into a toner tank for each copy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5185289U JPH02142852U (en) | 1989-05-01 | 1989-05-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5185289U JPH02142852U (en) | 1989-05-01 | 1989-05-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02142852U true JPH02142852U (en) | 1990-12-04 |
Family
ID=31571651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5185289U Pending JPH02142852U (en) | 1989-05-01 | 1989-05-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02142852U (en) |
-
1989
- 1989-05-01 JP JP5185289U patent/JPH02142852U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5689757A (en) | Method and apparatus for detecting substrate roughness and controlling print quality | |
| JPH0664404B2 (en) | Electrophotographic imager | |
| WO1988009529A1 (en) | Apparatus for controlling toner replenishment in electrostatographic | |
| EP0269695B1 (en) | Patch generator | |
| JPS6339249U (en) | ||
| US5036360A (en) | Moisture compensation for electrostatographic apparatus | |
| JP2631305B2 (en) | Image forming device | |
| US6201936B1 (en) | Method and apparatus for adaptive black solid area estimation in a xerographic apparatus | |
| US5005050A (en) | Control of toner particle charge | |
| US5047802A (en) | Process control of electrostatographic machine by adjusting charge-to-mass ratio of toner in response to toned density of developed image | |
| JPH0513311B2 (en) | ||
| US3969114A (en) | Method for monitoring copy quality | |
| JPH031661B2 (en) | ||
| JPH0642109B2 (en) | Automatic toner concentration controller | |
| JPH047510B2 (en) | ||
| JP3043820B2 (en) | Image forming device | |
| JP3441595B2 (en) | Electrophotographic toner adhesion amount measuring device | |
| JPS5887560A (en) | Copying machine | |
| JPS5822183Y2 (en) | Developer application amount control device | |
| JPH0741002Y2 (en) | Image density control device | |
| JP3041708B2 (en) | Image forming device | |
| JPS5930269B2 (en) | toner supply device | |
| JPS61201277A (en) | Control method for toner concentration | |
| JPH0113101B2 (en) | ||
| JPS6370275A (en) | Automatic image density controller for twin-color copying machine |