JPS5779968A - Operator detector - Google Patents

Operator detector

Info

Publication number
JPS5779968A
JPS5779968A JP55155157A JP15515780A JPS5779968A JP S5779968 A JPS5779968 A JP S5779968A JP 55155157 A JP55155157 A JP 55155157A JP 15515780 A JP15515780 A JP 15515780A JP S5779968 A JPS5779968 A JP S5779968A
Authority
JP
Japan
Prior art keywords
time
point
copying machine
operator
outputted
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
JP55155157A
Other languages
Japanese (ja)
Inventor
Yoshiaki Kamimoto
Toyokazu Satomi
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 JP55155157A priority Critical patent/JPS5779968A/en
Priority to US06/309,399 priority patent/US4399431A/en
Priority to DE3142134A priority patent/DE3142134C2/en
Publication of JPS5779968A publication Critical patent/JPS5779968A/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

Landscapes

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

Abstract

PURPOSE:To detect whether the operator is within the operation range of a copying machine or not by providing an ultrasonic wave generator and an ultrasonic wave receiver to the body of the copying machine and forming the body of the copying machine and the detector into one unit. CONSTITUTION:Reference signal generators 3 and 4, a generator 5 generating ultrasonic waves synchronously with the reference signals, a sound receiver 7 receiving the ultrasonic waves reflected by the operator O and converting the same to electric signals, and an FF11 comparing the point of the time delayed by a time from the point of the time when the reference signals are outputted and the point of the time when the electric signals are outputted, and provided. Depending upon whether the electric signals are outputted before the point of the time delayed by a time as a reference or not, the presence or absence of the operator in the operatable range of the copying machine is detected.
JP55155157A 1980-10-23 1980-11-06 Operator detector Pending JPS5779968A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP55155157A JPS5779968A (en) 1980-11-06 1980-11-06 Operator detector
US06/309,399 US4399431A (en) 1980-10-23 1981-10-07 Alarm or warning device for signaling left-behind master or original
DE3142134A DE3142134C2 (en) 1980-10-23 1981-10-23 Device for generating a warning signal for a copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55155157A JPS5779968A (en) 1980-11-06 1980-11-06 Operator detector

Publications (1)

Publication Number Publication Date
JPS5779968A true JPS5779968A (en) 1982-05-19

Family

ID=15599768

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55155157A Pending JPS5779968A (en) 1980-10-23 1980-11-06 Operator detector

Country Status (1)

Country Link
JP (1) JPS5779968A (en)

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