JPS5540449A - Method for detecting development capability of two-color developer and developing apparatus provided with unit using its method - Google Patents

Method for detecting development capability of two-color developer and developing apparatus provided with unit using its method

Info

Publication number
JPS5540449A
JPS5540449A JP11308278A JP11308278A JPS5540449A JP S5540449 A JPS5540449 A JP S5540449A JP 11308278 A JP11308278 A JP 11308278A JP 11308278 A JP11308278 A JP 11308278A JP S5540449 A JPS5540449 A JP S5540449A
Authority
JP
Japan
Prior art keywords
toner
developer
color developer
amount
color
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
JP11308278A
Other languages
Japanese (ja)
Inventor
Koji Hirakura
Yasuo Sawada
Kenta Watase
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 JP11308278A priority Critical patent/JPS5540449A/en
Priority to DE2927477A priority patent/DE2927477C2/en
Priority to US06/057,882 priority patent/US4266141A/en
Publication of JPS5540449A publication Critical patent/JPS5540449A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To detect development performance of a 2-color developer with high precision, by catching each color component separately from the 2-color developer, measuring each amount, and comparing each with a cleaning level to correct the amount. CONSTITUTION:Hopper 20 for storing 2-color developer 43 containing red and black toners is arranged in the recirculation cource. After flow route 23 has been cleaned by operation of vlaves 27 and 28, the cleaning levels of transparent conductive layers 22a and 22b are measured using light source 32 and photoelectric elements 33 and 34. Then, direct current voltages of reverse polarity are applied to layers 22a and 22b, respectively, the developer is allowed to drop freely to attach the black toner to layer 22a and the red toner to layer 22b. The attached amounts of both are measured. In computing circuit 37, the detected toner amounts are corrected by the cleaning levels, these values are compared to the set values from references each toner feed valves 41 and 42 are regulated to supply the required amount of each toner to the developer.
JP11308278A 1978-07-08 1978-09-14 Method for detecting development capability of two-color developer and developing apparatus provided with unit using its method Pending JPS5540449A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP11308278A JPS5540449A (en) 1978-09-14 1978-09-14 Method for detecting development capability of two-color developer and developing apparatus provided with unit using its method
DE2927477A DE2927477C2 (en) 1978-07-08 1979-07-06 Apparatus and method for measuring the developability of a powdered developer for electrostatography
US06/057,882 US4266141A (en) 1978-07-08 1979-07-16 Toner developing ability measuring system for electrostatography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11308278A JPS5540449A (en) 1978-09-14 1978-09-14 Method for detecting development capability of two-color developer and developing apparatus provided with unit using its method

Publications (1)

Publication Number Publication Date
JPS5540449A true JPS5540449A (en) 1980-03-21

Family

ID=14603018

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11308278A Pending JPS5540449A (en) 1978-07-08 1978-09-14 Method for detecting development capability of two-color developer and developing apparatus provided with unit using its method

Country Status (1)

Country Link
JP (1) JPS5540449A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5031829A (en) * 1973-04-16 1975-03-28
JPS5035285B2 (en) * 1972-10-21 1975-11-14

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5035285B2 (en) * 1972-10-21 1975-11-14
JPS5031829A (en) * 1973-04-16 1975-03-28

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