JPS56158346A - Detecting method of fatigue degree of photoreceptor - Google Patents

Detecting method of fatigue degree of photoreceptor

Info

Publication number
JPS56158346A
JPS56158346A JP6193980A JP6193980A JPS56158346A JP S56158346 A JPS56158346 A JP S56158346A JP 6193980 A JP6193980 A JP 6193980A JP 6193980 A JP6193980 A JP 6193980A JP S56158346 A JPS56158346 A JP S56158346A
Authority
JP
Japan
Prior art keywords
photoreceptor
pattern
potential
latent image
picture
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
Application number
JP6193980A
Other languages
Japanese (ja)
Inventor
Yoshitaka Fujikawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP6193980A priority Critical patent/JPS56158346A/en
Publication of JPS56158346A publication Critical patent/JPS56158346A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/0094—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge fatigue treatment of the photoconductor

Abstract

PURPOSE:To ensure an accurate detection for the fatigue degree of a photoreceptor which is used repetitively, by forming a pattern latent image corresponding to the density reference pattern through an optical system for picture exposure and then detecting the surface potential of the latent image or the picture density after a development. CONSTITUTION:A density reference pattern 18 is formed on the upper surface of an original base 1 and illuminated by an illumination lamp 5 simultaneously with an exposure of a picture. Then the pattern 18 is projected on a photoreceptor drum 3 via the same exposing device 4 to obtain a pattern latent image corresponding to the pattern 18. The potential of the pattern latent image is detected by a surface potentiometer 12, and this potential varies according to the fatigue degree of the photoreceptor of the drum 3 even though other factors are under the same conditions. In this connection, the difference of potential between a high- and low- potential regions or the speed of response of these regions are detected by the potentiometer 12 to obtain the degree of fatigue of a photoreceptor.
JP6193980A 1980-05-10 1980-05-10 Detecting method of fatigue degree of photoreceptor Pending JPS56158346A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6193980A JPS56158346A (en) 1980-05-10 1980-05-10 Detecting method of fatigue degree of photoreceptor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6193980A JPS56158346A (en) 1980-05-10 1980-05-10 Detecting method of fatigue degree of photoreceptor

Publications (1)

Publication Number Publication Date
JPS56158346A true JPS56158346A (en) 1981-12-07

Family

ID=13185648

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6193980A Pending JPS56158346A (en) 1980-05-10 1980-05-10 Detecting method of fatigue degree of photoreceptor

Country Status (1)

Country Link
JP (1) JPS56158346A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61121065A (en) * 1984-11-16 1986-06-09 Mita Ind Co Ltd Method for discriminating abnormal state of copying machine
JPS63133166A (en) * 1986-11-26 1988-06-04 Ricoh Co Ltd Photosensitive unit with life expiration detecting function
JPH02119257U (en) * 1988-11-30 1990-09-26

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61121065A (en) * 1984-11-16 1986-06-09 Mita Ind Co Ltd Method for discriminating abnormal state of copying machine
JPS63133166A (en) * 1986-11-26 1988-06-04 Ricoh Co Ltd Photosensitive unit with life expiration detecting function
JPH02119257U (en) * 1988-11-30 1990-09-26

Similar Documents

Publication Publication Date Title
JPS54141645A (en) Copy image adjusting method
JPS5393030A (en) Copying process control method of electrophotographic copying machine
JPS5742039A (en) Method and device for detecting initial positions of easel and lens in photographic device
DE69020305T2 (en) Toner for developing electrostatic images, image forming methods and image forming apparatus.
JPS57136667A (en) Developer density controller
JPS5393842A (en) Method and apparatus for developing electrostatic latent image
FR2352330A1 (en) METHOD AND DEVICE FOR DEVELOPING AN ELECTROSTATIC LATENT IMAGE
JPS5611466A (en) Electrophotographic copier using belt photoreceptor
JPS56158346A (en) Detecting method of fatigue degree of photoreceptor
JPS5274344A (en) Enlarged display means
JPS5756859A (en) Partial copying method of original in copying machine
JPS57212406A (en) Method and device for focusing
DE3271737D1 (en) Photosensitive relief image-forming materials and method of forming relief images using same
JPS52125340A (en) Development device for copier
FR2350629A1 (en) METHOD AND DEVICE FOR DEVELOPING AN ELECTROSTATIC LATENT IMAGE
DE69431388D1 (en) Image forming apparatus with device for optically detecting the amount of developer
JPS542134A (en) Automatic exposure controlling electrophotographiccopier
DK0528915T3 (en) Method and apparatus for determining the image clarity of a surface
JPS5642242A (en) Electrophotographic method
JPS5349436A (en) Picture density control method for electronic copier
JPS5678857A (en) Toner density detecting device
JPS57119381A (en) Method for partial copying of original in copying machine
JPS5332745A (en) Developing device for electrostatic latent image
BE827657A (en) METHOD AND APPARATUS FOR DEVELOPING AN ELECTROSTATIC LATENT IMAGE ON AN ELECTROPHOTOGRAPHIC FILM
JPS5395043A (en) Method and apparatus for detecting toner quantity on recording element