JPS56149062A - Device for stabilizing surface potential of rotary drum - Google Patents

Device for stabilizing surface potential of rotary drum

Info

Publication number
JPS56149062A
JPS56149062A JP5271580A JP5271580A JPS56149062A JP S56149062 A JPS56149062 A JP S56149062A JP 5271580 A JP5271580 A JP 5271580A JP 5271580 A JP5271580 A JP 5271580A JP S56149062 A JPS56149062 A JP S56149062A
Authority
JP
Japan
Prior art keywords
drum
conductor
surface potential
synchronous signal
charger
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
JP5271580A
Other languages
Japanese (ja)
Other versions
JPS6146830B2 (en
Inventor
Takanori Seki
Takuya Hosoda
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.)
Ando Electric Co Ltd
Original Assignee
Ando Electric 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 Ando Electric Co Ltd filed Critical Ando Electric Co Ltd
Priority to JP5271580A priority Critical patent/JPS56149062A/en
Publication of JPS56149062A publication Critical patent/JPS56149062A/en
Publication of JPS6146830B2 publication Critical patent/JPS6146830B2/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
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0266—Arrangements for controlling the amount of charge

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To prevent uneven copying, by forming a feedback loop between a charger and the surface of a photosensitive drum for use in a copying machine, etc. in order to control the surface potential itself of the drum. CONSTITUTION:When drum 1 is rotated with motor 5, conductor 4 fixed to drum 1 and the surface of drum 1 are alternately connected electrostatically with induction electrode 2 by connection capacity 3. At that time, a synchronous signal is produced from synchronous signal generator 6, and fed to phase synchronism detector 7, which detects the surface potentials of drum 1 and conductor 4 produced on electrode 2 on the basis of the synchronous signal, and judges height of the 2 potentials. When the potential of drum 1, and that of conductor 4 given from reference voltage source 10 are different, that difference is taken out as the output of detector 7, its rectified output is fed from rectifier 8 to charger 9, thus permitting the surface potential difference between drum 1 and conductor 4 to disappear as drum 1 rotates, and the surface potential of drum 1 to be locked to the constant voltage of source 10.
JP5271580A 1980-04-21 1980-04-21 Device for stabilizing surface potential of rotary drum Granted JPS56149062A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5271580A JPS56149062A (en) 1980-04-21 1980-04-21 Device for stabilizing surface potential of rotary drum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5271580A JPS56149062A (en) 1980-04-21 1980-04-21 Device for stabilizing surface potential of rotary drum

Publications (2)

Publication Number Publication Date
JPS56149062A true JPS56149062A (en) 1981-11-18
JPS6146830B2 JPS6146830B2 (en) 1986-10-16

Family

ID=12922598

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5271580A Granted JPS56149062A (en) 1980-04-21 1980-04-21 Device for stabilizing surface potential of rotary drum

Country Status (1)

Country Link
JP (1) JPS56149062A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60117262A (en) * 1983-11-29 1985-06-24 Mita Ind Co Ltd Detecting method of surface potential of photosensitive drum

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5528059A (en) * 1978-08-22 1980-02-28 Fuji Xerox Co Ltd Surface potential detecting device of charged body

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5528059A (en) * 1978-08-22 1980-02-28 Fuji Xerox Co Ltd Surface potential detecting device of charged body

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60117262A (en) * 1983-11-29 1985-06-24 Mita Ind Co Ltd Detecting method of surface potential of photosensitive drum

Also Published As

Publication number Publication date
JPS6146830B2 (en) 1986-10-16

Similar Documents

Publication Publication Date Title
GB1452149A (en) Electrophotographic developing apparatus
JPS5454264A (en) Static leonard device
JPS56132181A (en) Standby braking circuit for power conversion device for electric motor operation at variable speed
JPS6146830B2 (en)
JPS56147152A (en) Image transfer method of electrophotographic copying machine
JPH0341800Y2 (en)
JPS53804A (en) Failure detector for rotary rectifier
JPS54120818A (en) Torque detector for multiphase ac machine
JPS5543920A (en) Controller of alternating current motor
ES8104675A1 (en) Commutating capacitor charge detection circuit and method
JPS5541158A (en) Speed controller
JPS5592574A (en) Control system for lead angle of inverter device
ZA796330B (en) Circuit system for the generation of a direct control voltage depending upon an alternating voltage
JPS552398A (en) Generator controlling method and its device
JPS5614956A (en) Power-factor detection circuit
JPS558224A (en) Frequency converter control system
JPS5314310A (en) Controlling device of ac motor
JPS57136666A (en) Electrophotographic device
JPS552937A (en) Phase rotation detector
JPS5636001A (en) Capasitive sensor
JPS53114028A (en) Inverter controlling lead angle control circuit
JPS5523722A (en) Controller for induction motor
JPS54124208A (en) Dc machine rectification compensating device
JPS5478426A (en) Two-shaft synchronous excitation controller for cross compound generator
JPS56145779A (en) Power source