JPH0314348B2 - - Google Patents
Info
- Publication number
- JPH0314348B2 JPH0314348B2 JP58051720A JP5172083A JPH0314348B2 JP H0314348 B2 JPH0314348 B2 JP H0314348B2 JP 58051720 A JP58051720 A JP 58051720A JP 5172083 A JP5172083 A JP 5172083A JP H0314348 B2 JPH0314348 B2 JP H0314348B2
- Authority
- JP
- Japan
- Prior art keywords
- photoconductor
- toner
- level
- charge
- developer
- 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.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims description 2
- 239000000523 sample Substances 0.000 description 33
- 238000011161 development Methods 0.000 description 28
- 238000012360 testing method Methods 0.000 description 25
- 239000000463 material Substances 0.000 description 17
- 230000003287 optical effect Effects 0.000 description 16
- 238000000034 method Methods 0.000 description 15
- 238000005259 measurement Methods 0.000 description 13
- 239000013598 vector Substances 0.000 description 13
- 239000000203 mixture Substances 0.000 description 12
- 238000012546 transfer Methods 0.000 description 11
- 238000004140 cleaning Methods 0.000 description 10
- 239000002245 particle Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 239000011521 glass Substances 0.000 description 6
- 238000005286 illumination Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000011109 contamination Methods 0.000 description 4
- 108091008695 photoreceptors Proteins 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 3
- PMYDPQQPEAYXKD-UHFFFAOYSA-N 3-hydroxy-n-naphthalen-2-ylnaphthalene-2-carboxamide Chemical compound C1=CC=CC2=CC(NC(=O)C3=CC4=CC=CC=C4C=C3O)=CC=C21 PMYDPQQPEAYXKD-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 238000001739 density measurement Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 230000010076 replication Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
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
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
- G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
- G03G15/0849—Detection or control means for the developer concentration
- G03G15/0855—Detection or control means for the developer concentration the concentration being measured by optical means
-
- 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
- G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
- G03G15/5033—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the photoconductor characteristics, e.g. temperature, or the characteristics of an image on the photoconductor
- G03G15/5041—Detecting a toner image, e.g. density, toner coverage, using a test patch
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Or Security For Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/388,810 US4466731A (en) | 1982-06-16 | 1982-06-16 | Electrophotographic machine with high density toner concentration control |
| US388810 | 1982-06-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58220159A JPS58220159A (ja) | 1983-12-21 |
| JPH0314348B2 true JPH0314348B2 (US08087162-20120103-C00010.png) | 1991-02-26 |
Family
ID=23535611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58051720A Granted JPS58220159A (ja) | 1982-06-16 | 1983-03-29 | 電子写真複写機 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US4466731A (US08087162-20120103-C00010.png) |
| JP (1) | JPS58220159A (US08087162-20120103-C00010.png) |
Families Citing this family (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4614420A (en) * | 1983-05-31 | 1986-09-30 | Xerox Corporation | Magnetically agitated development system |
| US4536080A (en) * | 1983-08-19 | 1985-08-20 | Xerox Corporation | Developer material end of life sensing |
| US4626096A (en) * | 1984-04-02 | 1986-12-02 | Canon Kabushiki Kaisha | Image forming apparatus for forming a visual image in accordance with image signals |
| JPS60212781A (ja) * | 1984-04-06 | 1985-10-25 | Konishiroku Photo Ind Co Ltd | 静電複写記録装置 |
| JPH0640233B2 (ja) * | 1984-04-13 | 1994-05-25 | 株式会社リコー | 電子写真装置 |
| JPS60260067A (ja) * | 1984-06-06 | 1985-12-23 | Canon Inc | 電子写真の制御方法 |
| US4712907A (en) * | 1985-11-01 | 1987-12-15 | Xerox Corporation | Sequencing means for photocopying processes |
| US4801980A (en) * | 1986-10-29 | 1989-01-31 | Konica Corporation | Toner density control apparatus |
| US4721978A (en) * | 1986-10-31 | 1988-01-26 | Xerox Corporation | Color toner concentration control system |
| US4780744A (en) * | 1987-02-18 | 1988-10-25 | Eastman Kodak Company | System for quality monitoring and control in an electrophotographic process |
| US4786924A (en) * | 1987-03-20 | 1988-11-22 | Xerox Corporation | Hybrid control system for a copier |
| JPS63254476A (ja) * | 1987-04-11 | 1988-10-21 | Minolta Camera Co Ltd | 電子写真複写機 |
| JP2927808B2 (ja) * | 1988-03-22 | 1999-07-28 | 株式会社日立製作所 | 静電記録装置とその感光体寿命評価方法 |
| US4829336A (en) * | 1988-04-18 | 1989-05-09 | International Business Machines Corporation | Toner concentration control method and apparatus |
| US4879577A (en) * | 1988-04-19 | 1989-11-07 | International Business Machines Corporation | Method and apparatus for controlling the electrostatic parameters of an electrophotographic reproduction device |
| JPH02137866A (ja) * | 1988-11-18 | 1990-05-28 | Ricoh Co Ltd | 静電気録複写機の制御装置 |
| US5258248A (en) * | 1989-04-18 | 1993-11-02 | Ricoh Company, Ltd. | Image density control method for an image forming apparatus |
| US5298944A (en) * | 1989-06-30 | 1994-03-29 | Ricoh Company, Ltd. | Testing image density to control toner concentration and dynamic range in a digital copier |
| US5124750A (en) * | 1989-09-05 | 1992-06-23 | Minolta Camera Kabushiki Kaisha | Toner density detecting method, and image forming method and apparatus employing the toner density detecting method |
| DE4113777C2 (de) * | 1990-04-27 | 1995-09-14 | Ricoh Kk | Bilderzeugungseinrichtung |
| US5150155A (en) * | 1991-04-01 | 1992-09-22 | Eastman Kodak Company | Normalizing aim values and density patch readings for automatic set-up in electrostatographic machines |
| US5155530A (en) * | 1991-12-31 | 1992-10-13 | Xerox Corporation | Toner process control system based on toner developed mass, reflectance density and gloss |
| US5369473A (en) * | 1992-05-27 | 1994-11-29 | Mita Industrial Co., Ltd. | Image forming apparatus |
| US5574543A (en) * | 1993-09-16 | 1996-11-12 | Konica Corporation | Image forming apparatus |
| US5402214A (en) * | 1994-02-23 | 1995-03-28 | Xerox Corporation | Toner concentration sensing system for an electrophotographic printer |
| US5521677A (en) * | 1995-07-03 | 1996-05-28 | Xerox Corporation | Method for solid area process control for scavengeless development in a xerographic apparatus |
| US6029021A (en) | 1996-12-20 | 2000-02-22 | Fuji Xerox Co., Ltd. | Image forming apparatus having an adaptive mode density control system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58190966A (ja) * | 1982-05-01 | 1983-11-08 | Minolta Camera Co Ltd | 電子写真複写機 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3788739A (en) * | 1972-06-21 | 1974-01-29 | Xerox Corp | Image compensation method and apparatus for electrophotographic devices |
| US4183657A (en) * | 1978-04-10 | 1980-01-15 | International Business Machines Corporation | Dynamic reference for an image quality control system |
| US4179213A (en) * | 1978-04-10 | 1979-12-18 | International Business Machines Corporation | Vector pinning in an electrophotographic machine |
| US4326796A (en) * | 1979-12-13 | 1982-04-27 | International Business Machines Corporation | Apparatus and method for measuring and maintaining copy quality in an electrophotographic copier |
| US4348099A (en) * | 1980-04-07 | 1982-09-07 | Xerox Corporation | Closed loop control of reproduction machine |
| US4377338A (en) * | 1981-08-07 | 1983-03-22 | International Business Machines Corporation | Method and apparatus for copier quality monitoring and control |
-
1982
- 1982-06-16 US US06/388,810 patent/US4466731A/en not_active Expired - Fee Related
-
1983
- 1983-03-29 JP JP58051720A patent/JPS58220159A/ja active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58190966A (ja) * | 1982-05-01 | 1983-11-08 | Minolta Camera Co Ltd | 電子写真複写機 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58220159A (ja) | 1983-12-21 |
| US4466731A (en) | 1984-08-21 |
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