JPS56109333A - Microfilm printer - Google Patents

Microfilm printer

Info

Publication number
JPS56109333A
JPS56109333A JP1269180A JP1269180A JPS56109333A JP S56109333 A JPS56109333 A JP S56109333A JP 1269180 A JP1269180 A JP 1269180A JP 1269180 A JP1269180 A JP 1269180A JP S56109333 A JPS56109333 A JP S56109333A
Authority
JP
Japan
Prior art keywords
signal
voltage
microfilm
output
positive
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
JP1269180A
Other languages
Japanese (ja)
Other versions
JPH0211889B2 (en
Inventor
Kazuo Kashiwagi
Toshio Arai
Takao Toda
Masashige Shirai
Masaaki Yanagi
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 JP1269180A priority Critical patent/JPS56109333A/en
Priority to US06/228,721 priority patent/US4341463A/en
Priority to GB8103083A priority patent/GB2071356B/en
Publication of JPS56109333A publication Critical patent/JPS56109333A/en
Publication of JPH0211889B2 publication Critical patent/JPH0211889B2/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
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/221—Machines other than electrographic copiers, e.g. electrophotographic cameras, electrostatic typewriters
    • G03G15/223—Machines for handling microimages, e.g. microfilm copiers
    • 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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/10—Projectors with built-in or built-on screen
    • G03B21/11—Projectors with built-in or built-on screen for microfilm reading
    • G03B21/118—Reader-printers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Projection-Type Copiers In General (AREA)

Abstract

PURPOSE:To obtain a copy of a positive picture by measuring the quantity of light transmitted through a picture recorded on a microfilm, by comparing this measured value with a reference value to discriminate between the negative and positive of the recorded picture, and then by changing the polarity of the charge of a charger with the discrimination signal. CONSTITUTION:When the voltage of the output signal of photoelectric converting element 30 is higher than the voltage of the 1st reference signal generated by the 1st reference voltage generator 32, a signal of logic [1] is outputted. When the voltage of the output signal of element 30 is lower than the voltage of the 2nd reference signal generated by the 2nd reference voltage generator 34, a signal of logic [1] is generated. Namely, when the quantity of light inputted to element 30 is greater than a reference value, a decision on a microfilm with positive pictures is made to output the [1] signal from comparing circuit 33, and when less, a decision on a microfilm with negative pictures is made to output the [1] signal from comparing circuit 35. According to the discrimination signal, polarity change-over switch 41 is changed over and from high-voltage generation source 42, a high voltage of polarity equal to or different from that of developing toner of a processor is applied to charger 13 to charge copying paper.
JP1269180A 1980-02-05 1980-02-05 Microfilm printer Granted JPS56109333A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP1269180A JPS56109333A (en) 1980-02-05 1980-02-05 Microfilm printer
US06/228,721 US4341463A (en) 1980-02-05 1981-01-27 Image reproducing apparatus
GB8103083A GB2071356B (en) 1980-02-05 1981-02-02 Image reproducing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1269180A JPS56109333A (en) 1980-02-05 1980-02-05 Microfilm printer

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP61172578A Division JPS6254245A (en) 1986-07-22 1986-07-22 Picture deciding device

Publications (2)

Publication Number Publication Date
JPS56109333A true JPS56109333A (en) 1981-08-29
JPH0211889B2 JPH0211889B2 (en) 1990-03-16

Family

ID=11812393

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1269180A Granted JPS56109333A (en) 1980-02-05 1980-02-05 Microfilm printer

Country Status (1)

Country Link
JP (1) JPS56109333A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05249565A (en) * 1992-12-17 1993-09-28 Minolta Camera Co Ltd Image forming device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4829320A (en) * 1971-08-19 1973-04-18
JPS4937539A (en) * 1972-08-09 1974-04-08
JPS5026546A (en) * 1973-07-06 1975-03-19

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4829320A (en) * 1971-08-19 1973-04-18
JPS4937539A (en) * 1972-08-09 1974-04-08
JPS5026546A (en) * 1973-07-06 1975-03-19

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05249565A (en) * 1992-12-17 1993-09-28 Minolta Camera Co Ltd Image forming device

Also Published As

Publication number Publication date
JPH0211889B2 (en) 1990-03-16

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