JPS57116366A - Electrostatic recorder - Google Patents

Electrostatic recorder

Info

Publication number
JPS57116366A
JPS57116366A JP56002639A JP263981A JPS57116366A JP S57116366 A JPS57116366 A JP S57116366A JP 56002639 A JP56002639 A JP 56002639A JP 263981 A JP263981 A JP 263981A JP S57116366 A JPS57116366 A JP S57116366A
Authority
JP
Japan
Prior art keywords
bias voltage
superposed
accordance
image quality
electrostatic recorder
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
JP56002639A
Other languages
Japanese (ja)
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 JP56002639A priority Critical patent/JPS57116366A/en
Priority to US06/338,045 priority patent/US4511240A/en
Publication of JPS57116366A publication Critical patent/JPS57116366A/en
Priority to US06/921,103 priority patent/US4755850A/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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)
  • Developing For Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To obtain an electrostatic recorder which has excellent gradation reproducibility, high efficiency and low noise, by switching the AC voltage frequency of a development bias and a superposed DC bias voltage level in accordance with original image quality. CONSTITUTION:When a switch 16a is changed over, one of sine-wave oscillating circuits 9a and 9b differing in frequency is selected, and the frequencies of a development AC bias voltage for a high-efficiency, low-noise electrostatic recorder are changed over through an amplifying circuit 10 and a transformer 11 in accordance with an original having many half tones like a photograph and other originals. On the other hand, when a switch 16b is changed over, a DC bias voltage superposed upon an AC bias voltage brought under feedback control according to a latent image potential through a surface potential measuring circuit 12 and a DC-DC inverter 14a or a superposed DC bias voltage by a DC- DC inverter 14b applied with a fixed voltage is selected in accordance with original image quality. Therefore, even if the original image quality varies, the electrostatic recorder has excellent gradation reproducibility, high efficiency and low noise.
JP56002639A 1981-01-13 1981-01-13 Electrostatic recorder Pending JPS57116366A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP56002639A JPS57116366A (en) 1981-01-13 1981-01-13 Electrostatic recorder
US06/338,045 US4511240A (en) 1981-01-13 1982-01-08 Electrostatic recording apparatus
US06/921,103 US4755850A (en) 1981-01-13 1986-10-21 Electrostatic recording apparatus including a controlled developer device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56002639A JPS57116366A (en) 1981-01-13 1981-01-13 Electrostatic recorder

Publications (1)

Publication Number Publication Date
JPS57116366A true JPS57116366A (en) 1982-07-20

Family

ID=11534944

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56002639A Pending JPS57116366A (en) 1981-01-13 1981-01-13 Electrostatic recorder

Country Status (1)

Country Link
JP (1) JPS57116366A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6915970B2 (en) 2001-11-22 2005-07-12 Sintokogio, Ltd. Device for vibratingly smashing sand masses

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6915970B2 (en) 2001-11-22 2005-07-12 Sintokogio, Ltd. Device for vibratingly smashing sand masses

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