JPS5754934A - Alarm generating device of copying machine - Google Patents

Alarm generating device of copying machine

Info

Publication number
JPS5754934A
JPS5754934A JP55131193A JP13119380A JPS5754934A JP S5754934 A JPS5754934 A JP S5754934A JP 55131193 A JP55131193 A JP 55131193A JP 13119380 A JP13119380 A JP 13119380A JP S5754934 A JPS5754934 A JP S5754934A
Authority
JP
Japan
Prior art keywords
signal
original
conversion
ended
copying
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
JP55131193A
Other languages
Japanese (ja)
Inventor
Masayuki Iwamoto
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.)
Sanyo Electric Co Ltd
Sanyo Denki Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Sanyo Denki 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 Sanyo Electric Co Ltd, Sanyo Denki Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP55131193A priority Critical patent/JPS5754934A/en
Publication of JPS5754934A publication Critical patent/JPS5754934A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/62—Holders for the original
    • G03B27/6207—Holders for the original in copying cameras
    • G03B27/625—Apparatus which relate to the handling of originals, e.g. presence detectors, inverters

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Holders For Sensitive Materials And Originals (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To inform an operator of an original left behind, by operating an alarm device in case an original holder has not been released after a copying cycle has ended. CONSTITUTION:When copying has ended, a copy detecting signal S2 is converted to a high level, and a square wave pulse signal S4 is generated. When an original holder 2 is released within 20 seconds after copying has ended, a conversion signal S3 is converted to a low level. A reference signal S5 is generated in 20 seconds after copying has ended, but since the conversion signal S3 is in a conversion level (low level), an output S6 of an AND gate 20 is in a low level state as shown by a full line, and an alarm device 21 is not operated. In case an original has been left behind, the signal S3 of a conversion signal generating means 16 is in a high level (non-conversion level) state, therefore, the output signal S1 of the AND gate 20 becomes a high level as shown by a broken line. By this high level driving signal S6, a transistor 24 is turned on, the alarm device 21 is operated, and an alarm informing that the original has been left behind is raised.
JP55131193A 1980-09-19 1980-09-19 Alarm generating device of copying machine Pending JPS5754934A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55131193A JPS5754934A (en) 1980-09-19 1980-09-19 Alarm generating device of copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55131193A JPS5754934A (en) 1980-09-19 1980-09-19 Alarm generating device of copying machine

Publications (1)

Publication Number Publication Date
JPS5754934A true JPS5754934A (en) 1982-04-01

Family

ID=15052190

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55131193A Pending JPS5754934A (en) 1980-09-19 1980-09-19 Alarm generating device of copying machine

Country Status (1)

Country Link
JP (1) JPS5754934A (en)

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