JPS56159665A - Electrophotographic color copier - Google Patents

Electrophotographic color copier

Info

Publication number
JPS56159665A
JPS56159665A JP6299380A JP6299380A JPS56159665A JP S56159665 A JPS56159665 A JP S56159665A JP 6299380 A JP6299380 A JP 6299380A JP 6299380 A JP6299380 A JP 6299380A JP S56159665 A JPS56159665 A JP S56159665A
Authority
JP
Japan
Prior art keywords
drum
size
theta1
miniaturize
driven
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
JP6299380A
Other languages
Japanese (ja)
Other versions
JPH0330148B2 (en
Inventor
Nobuo Kasahara
Toshio Nakahara
Masayoshi Watanuki
Hidetoshi Yano
Kan Shiga
Yoshihiro Sakai
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP6299380A priority Critical patent/JPS56159665A/en
Publication of JPS56159665A publication Critical patent/JPS56159665A/en
Publication of JPH0330148B2 publication Critical patent/JPH0330148B2/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To miniaturize a device by decreasing a drum diameter and to reduce its cost by setting the drum diameter to B4 size and by providing the idling process of a drum while keeping a copying speed unchanged for a copy of A3 size. CONSTITUTION:A photoreceptor drum 8 and a transfer drum 25 are driven by a gear 38 via gears 8a and 25a, and an optical scanning system is driven with a clutch wheel 39 engaged with a clutch lever 45 provided to the drum 44. For a B4 size sheet S1, the optical system is returned in a no-picture area theta1 via a solenoid 65. For A3 size, however, returning it in the theta1 results in that region (theta1-theta2) is not exposed, so displacement of a pin 51 for releasing a clutch lever delays the disengagement time of a lever 45. As a reuslt, the returning process somewhat overlaps with the next process, so succeeding 2nd rotation is idle. In this case, single rotation is made idle corresponding to the number of separated colors. Thus, the drum diameter is decreased to miniaturize the device.
JP6299380A 1980-05-13 1980-05-13 Electrophotographic color copier Granted JPS56159665A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6299380A JPS56159665A (en) 1980-05-13 1980-05-13 Electrophotographic color copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6299380A JPS56159665A (en) 1980-05-13 1980-05-13 Electrophotographic color copier

Publications (2)

Publication Number Publication Date
JPS56159665A true JPS56159665A (en) 1981-12-09
JPH0330148B2 JPH0330148B2 (en) 1991-04-26

Family

ID=13216395

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6299380A Granted JPS56159665A (en) 1980-05-13 1980-05-13 Electrophotographic color copier

Country Status (1)

Country Link
JP (1) JPS56159665A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6167872A (en) * 1984-09-12 1986-04-08 Canon Inc Forming device of polychromatic picture
JPS62157062A (en) * 1985-12-28 1987-07-13 Konishiroku Photo Ind Co Ltd Image forming device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55576A (en) * 1979-04-14 1980-01-05 Canon Inc Transfer system copying apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55576A (en) * 1979-04-14 1980-01-05 Canon Inc Transfer system copying apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6167872A (en) * 1984-09-12 1986-04-08 Canon Inc Forming device of polychromatic picture
JPS62157062A (en) * 1985-12-28 1987-07-13 Konishiroku Photo Ind Co Ltd Image forming device

Also Published As

Publication number Publication date
JPH0330148B2 (en) 1991-04-26

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