DE69122366T2 - Densitometer zur Messung der Markierteilchendichte auf einem Photorezeptor, mit einem Kompensierungsverhältnis zur Anpassung an wechselnde Umgebungsbedingungen und unterschiedliche Maschinen - Google Patents
Densitometer zur Messung der Markierteilchendichte auf einem Photorezeptor, mit einem Kompensierungsverhältnis zur Anpassung an wechselnde Umgebungsbedingungen und unterschiedliche MaschinenInfo
- Publication number
- DE69122366T2 DE69122366T2 DE69122366T DE69122366T DE69122366T2 DE 69122366 T2 DE69122366 T2 DE 69122366T2 DE 69122366 T DE69122366 T DE 69122366T DE 69122366 T DE69122366 T DE 69122366T DE 69122366 T2 DE69122366 T2 DE 69122366T2
- Authority
- DE
- Germany
- Prior art keywords
- densitometer
- photoreceptor
- adaptation
- measuring
- environmental conditions
- 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 - Fee Related
Links
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
- G03G15/50—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
-
- 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
- G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
- G03G15/0105—Details of unit
- G03G15/0126—Details of unit using a solid developer
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/00025—Machine control, e.g. regulating different parts of the machine
- G03G2215/00029—Image density detection
- G03G2215/00033—Image density detection on recording member
- G03G2215/00037—Toner image detection
- G03G2215/00042—Optical detection
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Control Or Security For Electrophotography (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Dry Development In Electrophotography (AREA)
- Color Electrophotography (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/632,885 US5053822A (en) | 1990-12-24 | 1990-12-24 | Densitometer for measuring marking particle density on a photoreceptor having a compensation ratio which adjusts for changing environmental conditions and variability between machines |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69122366D1 DE69122366D1 (de) | 1996-10-31 |
DE69122366T2 true DE69122366T2 (de) | 1997-02-06 |
Family
ID=24537359
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69122366T Expired - Fee Related DE69122366T2 (de) | 1990-12-24 | 1991-12-19 | Densitometer zur Messung der Markierteilchendichte auf einem Photorezeptor, mit einem Kompensierungsverhältnis zur Anpassung an wechselnde Umgebungsbedingungen und unterschiedliche Maschinen |
Country Status (4)
Country | Link |
---|---|
US (1) | US5053822A (de) |
EP (1) | EP0492451B1 (de) |
JP (1) | JP3122502B2 (de) |
DE (1) | DE69122366T2 (de) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5083161A (en) * | 1989-08-25 | 1992-01-21 | Xerox Corporation | Densitometer for measuring developability |
US5162874A (en) * | 1990-12-24 | 1992-11-10 | Xerox Corporation | Electrophotographic machine having a method and apparatus for measuring toner density by using diffuse electromagnetic energy |
KR0138721B1 (ko) * | 1993-06-08 | 1998-05-15 | 가메다카 소키치 | 미세관내면 측정방법 및 장치(tube inner surface measuring method and apparatus) |
US5689757A (en) * | 1994-07-18 | 1997-11-18 | Xerox Corporation | Method and apparatus for detecting substrate roughness and controlling print quality |
US6215552B1 (en) | 1994-07-18 | 2001-04-10 | Xerox Corporation | Electrostatic process control based upon both the roughness and the thickness of a substrate |
US5581335A (en) * | 1994-11-04 | 1996-12-03 | Xerox Corporation | Programmable toner concentration and temperature sensor interface method and apparatus |
US5699450A (en) * | 1995-02-28 | 1997-12-16 | Xerox Corporation | Detector array method and apparatus for real time in situ color control in printers and copiers |
US5982500A (en) * | 1995-05-07 | 1999-11-09 | Platsch; Hans Georg | Device for measuring the surface of a print product |
US5666194A (en) * | 1996-05-30 | 1997-09-09 | Xerox Corporation | Apparatus for detecting marking material |
US5966573A (en) * | 1998-10-08 | 1999-10-12 | Xerox Corporation | Seamed flexible electrostatographic imaging belt having a permanent localized solid attribute |
US5960231A (en) * | 1998-11-03 | 1999-09-28 | Xerox Corporation | Variable thickness concentrate sense window |
US6366362B1 (en) | 1998-12-23 | 2002-04-02 | Xerox Corporation | Method and apparatus for adjusting input binary image halftone dots using template matching controlled by print engine xerographic density information to maintain constant tone reproduction on printed output over time |
JP4834252B2 (ja) * | 2001-08-06 | 2011-12-14 | キヤノン株式会社 | 画像形成装置 |
JP2003076129A (ja) * | 2001-08-31 | 2003-03-14 | Canon Inc | 画像形成装置 |
US7139511B2 (en) * | 2003-03-14 | 2006-11-21 | Ricoh Company, Ltd. | Image forming apparatus, method of calculating amount of toner transfer, methods of converting regular reflection output and diffuse reflection output, method of converting amount of toner transfer, apparatus for detecting amount of toner transfer, gradation pattern, and methods of controlling toner density and image density |
US7502116B2 (en) * | 2003-09-09 | 2009-03-10 | Hewlett-Packard Development Company, L.P. | Densitometers and methods for measuring optical density |
US7498578B2 (en) * | 2004-07-27 | 2009-03-03 | Xerox Corporation | Method and system for calibrating a reflection infrared densitometer in a digital image reproduction machine |
US20060141107A1 (en) * | 2004-12-29 | 2006-06-29 | Kraft Foods Holdings, Inc. | Method and system for controlling product density |
US8717647B2 (en) * | 2005-10-13 | 2014-05-06 | Hewlett-Packard Development Company, L.P. | Imaging methods, imaging device calibration methods, imaging devices, and hard imaging device sensor assemblies |
JP4876631B2 (ja) * | 2006-02-28 | 2012-02-15 | 東レ株式会社 | 粉体の目付測定方法および測定装置 |
JP4885682B2 (ja) * | 2006-10-18 | 2012-02-29 | シャープ株式会社 | 画像形成装置 |
US7903219B2 (en) * | 2007-08-16 | 2011-03-08 | Sony Corporation | Liquid crystal display device |
JP5123265B2 (ja) * | 2009-08-27 | 2013-01-23 | 京セラドキュメントソリューションズ株式会社 | 画像形成装置 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54143144A (en) * | 1978-04-14 | 1979-11-08 | Konishiroku Photo Ind Co Ltd | Image density detecting method and apparatus for zerographic copier |
US4226541A (en) * | 1978-08-11 | 1980-10-07 | Tisue James G | Method and apparatus for suppressing the effects of surface light scatter in optical reflective scanning system |
US4318610A (en) * | 1980-04-21 | 1982-03-09 | Xerox Corporation | Control system for an electrophotographic printing machine |
US4462680A (en) * | 1981-05-20 | 1984-07-31 | Canon Kabushiki Kaisha | Apparatus for controlling toner density |
US4502778A (en) * | 1982-12-27 | 1985-03-05 | International Business Machines Corporation | System for monitoring and controlling electrophotographic toner operation |
US4553033A (en) * | 1983-08-24 | 1985-11-12 | Xerox Corporation | Infrared reflectance densitometer |
US4677298A (en) * | 1983-12-13 | 1987-06-30 | Kollmorgen Technologies Corporation | Method of monitoring ink-water balance on a lithographic printing press |
DE3407754A1 (de) * | 1984-03-02 | 1985-09-12 | Boehringer Mannheim Gmbh, 6800 Mannheim | Geraet zur bestimmung des diffusen reflexionsvermoegens einer probenflaeche kleiner abmessungen |
US4801980A (en) * | 1986-10-29 | 1989-01-31 | Konica Corporation | Toner density control apparatus |
US4989985A (en) * | 1988-09-19 | 1991-02-05 | Xerox Corporation | Densitometer for measuring specular reflectivity |
US4950905A (en) * | 1989-02-06 | 1990-08-21 | Xerox Corporation | Colored toner optical developability sensor with improved sensing latitude |
-
1990
- 1990-12-24 US US07/632,885 patent/US5053822A/en not_active Expired - Lifetime
-
1991
- 1991-12-17 JP JP03333606A patent/JP3122502B2/ja not_active Expired - Fee Related
- 1991-12-19 DE DE69122366T patent/DE69122366T2/de not_active Expired - Fee Related
- 1991-12-19 EP EP91121818A patent/EP0492451B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US5053822A (en) | 1991-10-01 |
JPH04360177A (ja) | 1992-12-14 |
EP0492451A3 (en) | 1993-05-05 |
EP0492451B1 (de) | 1996-09-25 |
JP3122502B2 (ja) | 2001-01-09 |
EP0492451A2 (de) | 1992-07-01 |
DE69122366D1 (de) | 1996-10-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8320 | Willingness to grant licences declared (paragraph 23) | ||
8339 | Ceased/non-payment of the annual fee |