JPS57116365A - Electrostatic recorder - Google Patents

Electrostatic recorder

Info

Publication number
JPS57116365A
JPS57116365A JP56002638A JP263881A JPS57116365A JP S57116365 A JPS57116365 A JP S57116365A JP 56002638 A JP56002638 A JP 56002638A JP 263881 A JP263881 A JP 263881A JP S57116365 A JPS57116365 A JP S57116365A
Authority
JP
Japan
Prior art keywords
original image
half tones
reproduce
original
accordance
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.)
Granted
Application number
JP56002638A
Other languages
Japanese (ja)
Other versions
JPH027469B2 (en
Inventor
Koji Suzuki
Koki Kuroda
Joji Nagahira
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP56002638A priority Critical patent/JPS57116365A/en
Priority to US06/338,045 priority patent/US4511240A/en
Publication of JPS57116365A publication Critical patent/JPS57116365A/en
Publication of JPH027469B2 publication Critical patent/JPH027469B2/ja
Granted 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
    • 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
    • G03G15/5037—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 the characteristics being an electrical parameter, e.g. voltage
    • 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
    • G03G15/065—Arrangements for controlling the potential of the developing electrode

Abstract

PURPOSE:To reproduce an original image with excellent gradations even when the image has abundant half tones, by changing development AC bias voltage frequencies in accordance with original image quality. CONSTITUTION:When a switch 16a is changed over, a sine wave oscillator 9b with a 200-600Hz low frequency is selected for an image with many half tones like a photograph, and the other sine wave oscillator 9a with a 800-1,500Hz high frequency is selected for an original with less half tones. Consequently, development AC bias voltage frequencies are changed through an amplifying circuit 10, a transformer 11, etc., in accordance with original image quality to reproduce with excellent gradations even when the original image has abundant half tones.
JP56002638A 1981-01-13 1981-01-13 Electrostatic recorder Granted JPS57116365A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP56002638A JPS57116365A (en) 1981-01-13 1981-01-13 Electrostatic recorder
US06/338,045 US4511240A (en) 1981-01-13 1982-01-08 Electrostatic recording apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56002638A JPS57116365A (en) 1981-01-13 1981-01-13 Electrostatic recorder

Publications (2)

Publication Number Publication Date
JPS57116365A true JPS57116365A (en) 1982-07-20
JPH027469B2 JPH027469B2 (en) 1990-02-19

Family

ID=11534916

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56002638A Granted JPS57116365A (en) 1981-01-13 1981-01-13 Electrostatic recorder

Country Status (1)

Country Link
JP (1) JPS57116365A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60131555A (en) * 1983-12-20 1985-07-13 Konishiroku Photo Ind Co Ltd Developing method
JPS62131270A (en) * 1985-12-02 1987-06-13 Canon Inc Electrophotographic method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60131555A (en) * 1983-12-20 1985-07-13 Konishiroku Photo Ind Co Ltd Developing method
JPH0451027B2 (en) * 1983-12-20 1992-08-17 Konishiroku Photo Ind
JPS62131270A (en) * 1985-12-02 1987-06-13 Canon Inc Electrophotographic method

Also Published As

Publication number Publication date
JPH027469B2 (en) 1990-02-19

Similar Documents

Publication Publication Date Title
JPS535520A (en) Facsimile transmitter
JPS57116365A (en) Electrostatic recorder
AU510667B2 (en) High frequency resonant circuit
JPS57116366A (en) Electrostatic recorder
JPS5348518A (en) Voltabe constant driving circuit
JPS5379520A (en) Electronic musical instrument
JPS5317252A (en) Ssb modulator and demodulator
JPS5219994A (en) Sound wave converter unit
JPS5213757A (en) Sine wave signal generator circuit
JPS5384199A (en) Insulating ceramic
JPS51145312A (en) Vibration plate for a speaker and its manufacturing method
JPS5358833A (en) High frequency heating apparatus
JPS5333612A (en) Sound source unit for electronic musical
JPS5330253A (en) Sound quality adjustment circuit
JPS5439619A (en) Electronic musical instrument
JPS52112313A (en) Electronic musical instrument
KR800000682B1 (en) Color television receiver employing elastic surface wave
JPS51141615A (en) Automatic tuning apparatus for electronic musical instrument
JPS5263654A (en) Am modulating circuit
JPS55135897A (en) Standard tuning frequency signal generation circuit
JPS52113193A (en) Electromagnetic type converter
JPS55127738A (en) Antenna matching unit
JPS52104220A (en) Electronic musical instrument
JPS5351947A (en) Electronic circuit
JPS5317011A (en) Carrier conerter