JPS5677880A - Toner full-up detector - Google Patents

Toner full-up detector

Info

Publication number
JPS5677880A
JPS5677880A JP15407479A JP15407479A JPS5677880A JP S5677880 A JPS5677880 A JP S5677880A JP 15407479 A JP15407479 A JP 15407479A JP 15407479 A JP15407479 A JP 15407479A JP S5677880 A JPS5677880 A JP S5677880A
Authority
JP
Japan
Prior art keywords
toner
full
detection
output
circuit
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
JP15407479A
Other languages
Japanese (ja)
Inventor
Shinichi Iwasaki
Hiroaki Tsuchiya
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 JP15407479A priority Critical patent/JPS5677880A/en
Publication of JPS5677880A publication Critical patent/JPS5677880A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To enable detection of full-up state of a toner accurately while preventing erroneous detection by arranging two couples of photodetectors and light emitting elements at prescribed positions in a toner collection box and by outputting a detection signal by making use of differences in output. CONSTITUTION:In toner collection box 8, right guides 10 and 11 are provided and while light emitting body 9 is provided at one terminal, photodetectors 12 and 13 provided at the other terminals. At this time, element 13 should be buried in a preset full-up amount of toner and element 12 over it. Further, a prescribed electric circuit is provided. In this constitution, when the box is filled up, a difference in output between elements 12 and 13 is generated an inputted to arithmetic circuit 20 via resistances 18 and 19. As the output of circuit 20 increases above the reference voltage set by variable resistor 25, comparing circuit 21 outputs a full-up signal. Consequently, accurate full-up detection can be carried out without erroneous detection even if the toner sticks to the photodetection surfaces.
JP15407479A 1979-11-28 1979-11-28 Toner full-up detector Pending JPS5677880A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15407479A JPS5677880A (en) 1979-11-28 1979-11-28 Toner full-up detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15407479A JPS5677880A (en) 1979-11-28 1979-11-28 Toner full-up detector

Publications (1)

Publication Number Publication Date
JPS5677880A true JPS5677880A (en) 1981-06-26

Family

ID=15576315

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15407479A Pending JPS5677880A (en) 1979-11-28 1979-11-28 Toner full-up detector

Country Status (1)

Country Link
JP (1) JPS5677880A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4730205A (en) * 1985-09-05 1988-03-08 Mita Industrial Co. Ltd. Toner collecting apparatus
US5617194A (en) * 1994-03-15 1997-04-01 Mita Industrial, Co., Ltd. Cleaning unit including a cleaning roller and a separator plate which separates a cleaning chamber from a toner storage and which comes within a predetermined spacing from the cleaning roller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4730205A (en) * 1985-09-05 1988-03-08 Mita Industrial Co. Ltd. Toner collecting apparatus
US5617194A (en) * 1994-03-15 1997-04-01 Mita Industrial, Co., Ltd. Cleaning unit including a cleaning roller and a separator plate which separates a cleaning chamber from a toner storage and which comes within a predetermined spacing from the cleaning roller

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