JPS5723973A - Toner empty detection circuit for laser printer - Google Patents

Toner empty detection circuit for laser printer

Info

Publication number
JPS5723973A
JPS5723973A JP9900880A JP9900880A JPS5723973A JP S5723973 A JPS5723973 A JP S5723973A JP 9900880 A JP9900880 A JP 9900880A JP 9900880 A JP9900880 A JP 9900880A JP S5723973 A JPS5723973 A JP S5723973A
Authority
JP
Japan
Prior art keywords
toner
laser printer
paper
toner empty
detection 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.)
Granted
Application number
JP9900880A
Other languages
Japanese (ja)
Other versions
JPS645709B2 (en
Inventor
Takanobu Yasukake
Tsuneki Kobayashi
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.)
Koki Holdings Co Ltd
Original Assignee
Hitachi Koki 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 Hitachi Koki Co Ltd filed Critical Hitachi Koki Co Ltd
Priority to JP9900880A priority Critical patent/JPS5723973A/en
Publication of JPS5723973A publication Critical patent/JPS5723973A/en
Publication of JPS645709B2 publication Critical patent/JPS645709B2/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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
    • G03G15/0856—Detection or control means for the developer level

Landscapes

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

Abstract

PURPOSE:To prevent light printing by informing the shortage of toner even at the operation stop indicating switch operation of a laser printer. CONSTITUTION:When the residual mount of toner in a developper is less, a switch 1 which indicates the operation stop of a laser printer is connected to a contact B to replace the print paper to another paper and an FF8 is set. Thus, the output of an OR gate applied with the paper end signal is at high level, an AND gate 11 is opened and an FF9 is set with a high level signal due to less residual toner. Then, a lamp 16 illuminates via a driver 15 and a toner empty is displayed. Thus, even if the paper end signal is not produced due to replaced paper, the toner empty is displayed, allowing to avoid light printing.
JP9900880A 1980-07-18 1980-07-18 Toner empty detection circuit for laser printer Granted JPS5723973A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9900880A JPS5723973A (en) 1980-07-18 1980-07-18 Toner empty detection circuit for laser printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9900880A JPS5723973A (en) 1980-07-18 1980-07-18 Toner empty detection circuit for laser printer

Publications (2)

Publication Number Publication Date
JPS5723973A true JPS5723973A (en) 1982-02-08
JPS645709B2 JPS645709B2 (en) 1989-01-31

Family

ID=14235022

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9900880A Granted JPS5723973A (en) 1980-07-18 1980-07-18 Toner empty detection circuit for laser printer

Country Status (1)

Country Link
JP (1) JPS5723973A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001305845A (en) * 2000-04-18 2001-11-02 Fuji Xerox Co Ltd Image formation equipment

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5521027A (en) * 1978-07-31 1980-02-14 Ricoh Co Ltd Detector of remaining amount of developer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5521027A (en) * 1978-07-31 1980-02-14 Ricoh Co Ltd Detector of remaining amount of developer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001305845A (en) * 2000-04-18 2001-11-02 Fuji Xerox Co Ltd Image formation equipment

Also Published As

Publication number Publication date
JPS645709B2 (en) 1989-01-31

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