JPS647073A - Electrostatic charging device for copying machine - Google Patents

Electrostatic charging device for copying machine

Info

Publication number
JPS647073A
JPS647073A JP16465987A JP16465987A JPS647073A JP S647073 A JPS647073 A JP S647073A JP 16465987 A JP16465987 A JP 16465987A JP 16465987 A JP16465987 A JP 16465987A JP S647073 A JPS647073 A JP S647073A
Authority
JP
Japan
Prior art keywords
photosensitive body
charger case
power source
high voltage
long period
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
JP16465987A
Other languages
Japanese (ja)
Inventor
Toshitaka Yui
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP16465987A priority Critical patent/JPS647073A/en
Publication of JPS647073A publication Critical patent/JPS647073A/en
Pending legal-status Critical Current

Links

Landscapes

  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)

Abstract

PURPOSE:To hold the surface potential of a photosensitive body constant and to make the quality of an image constant for a long period without cleaning a charger case frequently by providing a variable resistor between the charger case and a high voltage power source. CONSTITUTION:A corona wire 3 which is connected to the plus side of the high voltage power source 2 and a charger case 4 which is open to the side of the photosensitive body 1 while arranged at the periphery of the corona wire 3 are provided so as to charge the photosensitive body 1 of a copying machine electrostatically, and the variable resistor 5 is provided between the charger case 4 and the negative side of the high voltage power source 2. Then the surface potential of the photosensitive body 1 is held constant by varying the resistance value of the variable resistor 5. Consequently, the charger case 4 need not be cleaned frequently, the surface potential of the photosensitive body 1 does not vary even after being used for a long period, and the quality of the image is held constant for a long period.
JP16465987A 1987-06-30 1987-06-30 Electrostatic charging device for copying machine Pending JPS647073A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16465987A JPS647073A (en) 1987-06-30 1987-06-30 Electrostatic charging device for copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16465987A JPS647073A (en) 1987-06-30 1987-06-30 Electrostatic charging device for copying machine

Publications (1)

Publication Number Publication Date
JPS647073A true JPS647073A (en) 1989-01-11

Family

ID=15797369

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16465987A Pending JPS647073A (en) 1987-06-30 1987-06-30 Electrostatic charging device for copying machine

Country Status (1)

Country Link
JP (1) JPS647073A (en)

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