JPS5677852A - Variable magnification controllable copying apparatus - Google Patents

Variable magnification controllable copying apparatus

Info

Publication number
JPS5677852A
JPS5677852A JP15407679A JP15407679A JPS5677852A JP S5677852 A JPS5677852 A JP S5677852A JP 15407679 A JP15407679 A JP 15407679A JP 15407679 A JP15407679 A JP 15407679A JP S5677852 A JPS5677852 A JP S5677852A
Authority
JP
Japan
Prior art keywords
drum
destaticizer
sensor
currents
potential
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
JP15407679A
Other languages
English (en)
Other versions
JPH0241027B2 (ja
Inventor
Shigehiro Komori
Hiroshi Ogawa
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 JP15407679A priority Critical patent/JPS5677852A/ja
Priority to US06/141,922 priority patent/US4411514A/en
Priority to DE19803015820 priority patent/DE3015820A1/de
Publication of JPS5677852A publication Critical patent/JPS5677852A/ja
Publication of JPH0241027B2 publication Critical patent/JPH0241027B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Variable Magnification In Projection-Type Copying Machines (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
JP15407679A 1979-04-24 1979-11-28 Variable magnification controllable copying apparatus Granted JPS5677852A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP15407679A JPS5677852A (en) 1979-11-28 1979-11-28 Variable magnification controllable copying apparatus
US06/141,922 US4411514A (en) 1979-04-24 1980-04-21 Variable magnification electrophotographic copying apparatus
DE19803015820 DE3015820A1 (de) 1979-04-24 1980-04-24 Elektrophotographisches kopiergeraet mit veraenderbarer vergroesserung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15407679A JPS5677852A (en) 1979-11-28 1979-11-28 Variable magnification controllable copying apparatus

Publications (2)

Publication Number Publication Date
JPS5677852A true JPS5677852A (en) 1981-06-26
JPH0241027B2 JPH0241027B2 (ja) 1990-09-14

Family

ID=15576358

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15407679A Granted JPS5677852A (en) 1979-04-24 1979-11-28 Variable magnification controllable copying apparatus

Country Status (1)

Country Link
JP (1) JPS5677852A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0489956U (ja) * 1991-07-04 1992-08-05

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5428632A (en) * 1977-08-05 1979-03-03 Konishiroku Photo Ind Co Ltd Method and apparatus of exposure correction in copying magnification varaible copying apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5428632A (en) * 1977-08-05 1979-03-03 Konishiroku Photo Ind Co Ltd Method and apparatus of exposure correction in copying magnification varaible copying apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0489956U (ja) * 1991-07-04 1992-08-05

Also Published As

Publication number Publication date
JPH0241027B2 (ja) 1990-09-14

Similar Documents

Publication Publication Date Title
JPS55157756A (en) Surface potential control unit
JPS5518656A (en) Electrophotographic developing method
JPS53115233A (en) Control for electrophotogtaphic copier
JPS5518667A (en) Stabilization method of image density
JPS53136838A (en) Automatic controlling method of image quality in transfer type electrostatic copier
JPS57200054A (en) Picture forming device
JPS5677852A (en) Variable magnification controllable copying apparatus
JPS5393835A (en) Copy picture quality controller of electrostatic copying machine
JPS5784463A (en) Image former
JPS55142368A (en) Variable magnification copying machine
JPS5688142A (en) Image density control device
JPS5589859A (en) Method and apparatus for forming stable image
JPS5483437A (en) Electrophotographic copying apparatus
JPS53102745A (en) Correcting method of degrees of fatigue of photosensitive body of electrophotographic copying machine
JPS5776564A (en) Control system of copy surface image
JPS5677850A (en) Method of controlling surface potential of photoreceptor of electrophotographic copier
JPS55117163A (en) Image forming device
JPS57100448A (en) Color copying device
JPS54154334A (en) Electrophotographic apparatus and nethod thereof
JPS5756867A (en) Copying machine equipped with monitor
JPS54141646A (en) Copy image adjusting method
JPS57100445A (en) Image forming method of electrophotography
JPS5492238A (en) Method and apparatus for stabilizing of electrostatic latent images
JPS5638058A (en) Image comtrolling method
JPS5417847A (en) Control method for electrophotography