JPS5669652A - Copying machine provided with copying processing device which is controllable according to environmental change - Google Patents

Copying machine provided with copying processing device which is controllable according to environmental change

Info

Publication number
JPS5669652A
JPS5669652A JP14682779A JP14682779A JPS5669652A JP S5669652 A JPS5669652 A JP S5669652A JP 14682779 A JP14682779 A JP 14682779A JP 14682779 A JP14682779 A JP 14682779A JP S5669652 A JPS5669652 A JP S5669652A
Authority
JP
Japan
Prior art keywords
sheet
decrease
amount
measured
copying
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
JP14682779A
Other languages
Japanese (ja)
Inventor
Hiroyuki Miyake
Nobukazu Sasaki
Seiji Sagara
Kazuo Kagiura
Takaharu Yonemori
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 JP14682779A priority Critical patent/JPS5669652A/en
Publication of JPS5669652A publication Critical patent/JPS5669652A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE: To stabilize image densities by measuring the moisture abosorption amount of sheets and controlling a high-voltage transformer for transfer charging or separation and destaticization according to the same.
CONSTITUTION: The resistance value of the sheet held between an upper register roller 51 and a lower register roller 52 is measured. Now, when the measured resistance value of the sheet is lower than a standard permissible range, said measured value is fed back to a control system, and the applied voltage of a transfer charger 18 is increased and the amount of charge supply is increased according to the program having beforehand been set in the memory device in said control unit. Thereby, the decrease in the field strength between the sheet and photosensitive drum and the decrease in the charge on the sheet owing to the change in the resistance of the sheet are compensated and the decrease in the transfer efficiency of the toner images on the photoreceptor is thus prevented. Further, the applied voltage of a separating destaticizer 19 is also controlled, whereby the residual charge amount of the sheet after passage through the destaticizer 19 is decreased.
COPYRIGHT: (C)1981,JPO&Japio
JP14682779A 1979-11-13 1979-11-13 Copying machine provided with copying processing device which is controllable according to environmental change Pending JPS5669652A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14682779A JPS5669652A (en) 1979-11-13 1979-11-13 Copying machine provided with copying processing device which is controllable according to environmental change

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14682779A JPS5669652A (en) 1979-11-13 1979-11-13 Copying machine provided with copying processing device which is controllable according to environmental change

Publications (1)

Publication Number Publication Date
JPS5669652A true JPS5669652A (en) 1981-06-11

Family

ID=15416411

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14682779A Pending JPS5669652A (en) 1979-11-13 1979-11-13 Copying machine provided with copying processing device which is controllable according to environmental change

Country Status (1)

Country Link
JP (1) JPS5669652A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0660197A3 (en) * 1993-12-20 1995-08-02 Konishiroku Photo Ind
US5682575A (en) * 1993-10-08 1997-10-28 Oki Electric Industry Co., Ltd. Electrophotographic recording apparatus having transfer voltage control device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5682575A (en) * 1993-10-08 1997-10-28 Oki Electric Industry Co., Ltd. Electrophotographic recording apparatus having transfer voltage control device
EP0660197A3 (en) * 1993-12-20 1995-08-02 Konishiroku Photo Ind

Similar Documents

Publication Publication Date Title
JPS53136838A (en) Automatic controlling method of image quality in transfer type electrostatic copier
JPS57114163A (en) Developing device
JPS5543564A (en) Electrophotographic copying method
JPS5515185A (en) Image density control method
JPS56104363A (en) Transfer paper separating device in powder image transfer type electrophotographic copier
JPS5538502A (en) Transfer device of color electrophotographic copier
JPS54115233A (en) Reversal development process
JPS5669653A (en) Copying machine provided with copying processing device which is controllable according to environmental change
JPS5785070A (en) Control device for copying density of electrophotographic copier
JPS57100448A (en) Color copying device
GB1482951A (en) Electrostatic copying machine
JPS578553A (en) Recording device
JPS5573070A (en) Powder image transfer type electrophotographic copier
JPS56161557A (en) Method for controlling electrophotographic copying machine
JPS5483437A (en) Electrophotographic copying apparatus
JPS57164739A (en) Copying apparatus
JPS5562465A (en) Electronic copier
JPS54126550A (en) Static latent image developing apparatus
JPS55149953A (en) Electric charging control method
JPS5741659A (en) Electrostatic printing method
JPS5770551A (en) Copy image adjustment method
JPS55120048A (en) Recording density control method in electrophotographic type printer
JPS5742056A (en) Electrostatic printing control method
JPS5535331A (en) Transfer method of electrophotographic copier
JPS5465547A (en) Multicolor electrophotographic copier