JPS56130773A - Dichromatic developing device - Google Patents

Dichromatic developing device

Info

Publication number
JPS56130773A
JPS56130773A JP3460780A JP3460780A JPS56130773A JP S56130773 A JPS56130773 A JP S56130773A JP 3460780 A JP3460780 A JP 3460780A JP 3460780 A JP3460780 A JP 3460780A JP S56130773 A JPS56130773 A JP S56130773A
Authority
JP
Japan
Prior art keywords
toner
development
developer
amount
transmitting means
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
JP3460780A
Other languages
Japanese (ja)
Inventor
Masatoshi Saito
Shuichi Tsushima
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 JP3460780A priority Critical patent/JPS56130773A/en
Publication of JPS56130773A publication Critical patent/JPS56130773A/en
Pending 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
    • G03G15/0105—Details of unit
    • G03G15/0126—Details of unit using a solid developer

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To obtain excellent copy pictures while preventing a waste of toner in the 2nd development by sending an operation signal, which operates a developer separator in the 2nd development unit, only at the time set by a signal transmitting means. CONSTITUTION:In the device which develops two electrostatic latent images opposite in polarity by successively supplying dichromic pulverulent toner of the opposite polarities from the 1st and 2nd development units 70 and 80, mixed toner density detector 26 and separation roller 28 as a signal transmitting means are arranged at scraping-off plate 25 guiding the toner from development sleeve 20 downward and only when the amount of red toner exceeds its permissible amount set previously, an operation signal is sent to developer separator 27, which is operated until the amount of the red toner in developer 14 decreases below a reference value.
JP3460780A 1980-03-18 1980-03-18 Dichromatic developing device Pending JPS56130773A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3460780A JPS56130773A (en) 1980-03-18 1980-03-18 Dichromatic developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3460780A JPS56130773A (en) 1980-03-18 1980-03-18 Dichromatic developing device

Publications (1)

Publication Number Publication Date
JPS56130773A true JPS56130773A (en) 1981-10-13

Family

ID=12419041

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3460780A Pending JPS56130773A (en) 1980-03-18 1980-03-18 Dichromatic developing device

Country Status (1)

Country Link
JP (1) JPS56130773A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108557A (en) * 1981-12-22 1983-06-28 Fujitsu Ltd Two-color recording device
JPS62195155U (en) * 1986-05-30 1987-12-11
US4982238A (en) * 1989-10-19 1991-01-01 Xerox Corporation Developer material mixing apparatus for a development unit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54104834A (en) * 1978-02-06 1979-08-17 Ricoh Co Ltd Two-color image reproducing device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54104834A (en) * 1978-02-06 1979-08-17 Ricoh Co Ltd Two-color image reproducing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108557A (en) * 1981-12-22 1983-06-28 Fujitsu Ltd Two-color recording device
JPH041906B2 (en) * 1981-12-22 1992-01-14 Fujitsu Ltd
JPS62195155U (en) * 1986-05-30 1987-12-11
US4982238A (en) * 1989-10-19 1991-01-01 Xerox Corporation Developer material mixing apparatus for a development unit

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