JPS57100448A - Color copying device - Google Patents

Color copying device

Info

Publication number
JPS57100448A
JPS57100448A JP55176613A JP17661380A JPS57100448A JP S57100448 A JPS57100448 A JP S57100448A JP 55176613 A JP55176613 A JP 55176613A JP 17661380 A JP17661380 A JP 17661380A JP S57100448 A JPS57100448 A JP S57100448A
Authority
JP
Japan
Prior art keywords
fine adjustment
color
target value
potential
voltage
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
JP55176613A
Other languages
Japanese (ja)
Other versions
JPH0158505B2 (en
Inventor
Koji Suzuki
Yutaka Komiya
Koki Kuroda
Joji Nagahira
Takao Aoki
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 JP55176613A priority Critical patent/JPS57100448A/en
Priority to DE19813149668 priority patent/DE3149668A1/en
Priority to GB8137973A priority patent/GB2092068B/en
Publication of JPS57100448A publication Critical patent/JPS57100448A/en
Priority to US06/843,085 priority patent/US4736223A/en
Publication of JPH0158505B2 publication Critical patent/JPH0158505B2/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
    • G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies

Abstract

PURPOSE:To obtain a color copy with good color balance, by providing a set value converging means for both the bright and dark parts plus a setting means which gives a fine adjustment to the target value with every separated color of an original image in accordance with the detection signal of the surface potential of a photoreceptor and switching these means individually or simultaneously. CONSTITUTION:A color original on a platen 3 is irradiated via a filter 15 on a drum 1 which received an even electric charging and then transcribed onto the transfer paper 51 on a drum 55 after the development. The static potential is detected between an entire surface exposure lamp 39 and a developing machine 41, through a potential detecting part 43. The value of the static potential is fed to a computer to set a prescribed target value. This target value is decided in three steps. In this connection, a fine adjustment board is provided and a fine adjustment is given from outside to produce a picture fine adjustment signal. Thus the control is exercised over the halogen voltage, the primary charged current, the negative grid voltage, the secondary charged voltage and the positive grid voltage respectively. In such a way, a color copy is obtained with high quality.
JP55176613A 1980-12-16 1980-12-16 Color copying device Granted JPS57100448A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP55176613A JPS57100448A (en) 1980-12-16 1980-12-16 Color copying device
DE19813149668 DE3149668A1 (en) 1980-12-16 1981-12-15 "COLOR COPIER"
GB8137973A GB2092068B (en) 1980-12-16 1981-12-16 Controlling colour balance in electrostatic copiers
US06/843,085 US4736223A (en) 1980-12-16 1986-05-22 Color copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55176613A JPS57100448A (en) 1980-12-16 1980-12-16 Color copying device

Publications (2)

Publication Number Publication Date
JPS57100448A true JPS57100448A (en) 1982-06-22
JPH0158505B2 JPH0158505B2 (en) 1989-12-12

Family

ID=16016622

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55176613A Granted JPS57100448A (en) 1980-12-16 1980-12-16 Color copying device

Country Status (1)

Country Link
JP (1) JPS57100448A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4989043A (en) * 1988-05-09 1991-01-29 Ricoh Company, Ltd. Color-balance control method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0426901U (en) * 1990-06-28 1992-03-03
JPH04125202U (en) * 1991-05-02 1992-11-16 サンキン株式会社 Garbage bag
JPH072305U (en) * 1993-06-16 1995-01-13 幸生 笠原 Garbage bags

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5020730A (en) * 1973-05-17 1975-03-05
JPS5099333A (en) * 1973-12-28 1975-08-07
JPS55157756A (en) * 1979-05-29 1980-12-08 Canon Inc Surface potential control unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5020730A (en) * 1973-05-17 1975-03-05
JPS5099333A (en) * 1973-12-28 1975-08-07
JPS55157756A (en) * 1979-05-29 1980-12-08 Canon Inc Surface potential control unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4989043A (en) * 1988-05-09 1991-01-29 Ricoh Company, Ltd. Color-balance control method

Also Published As

Publication number Publication date
JPH0158505B2 (en) 1989-12-12

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