GB1345454A - Photo-printing machine - Google Patents

Photo-printing machine

Info

Publication number
GB1345454A
GB1345454A GB1228172A GB1228172A GB1345454A GB 1345454 A GB1345454 A GB 1345454A GB 1228172 A GB1228172 A GB 1228172A GB 1228172 A GB1228172 A GB 1228172A GB 1345454 A GB1345454 A GB 1345454A
Authority
GB
United Kingdom
Prior art keywords
original
capacitor
exposure station
photo
station
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.)
Expired
Application number
GB1228172A
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.)
METEOR SEIGEN APPARATEBAU PAUL
Original Assignee
METEOR SEIGEN APPARATEBAU PAUL
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 METEOR SEIGEN APPARATEBAU PAUL filed Critical METEOR SEIGEN APPARATEBAU PAUL
Publication of GB1345454A publication Critical patent/GB1345454A/en
Expired 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
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
    • G03B27/80—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus in dependence upon automatic analysis of the original

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Exposure In Printing And Copying (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

1345454 Photoprinter METEOR-SEIGEN APPARATEBAU PAUL SCHMECK GmbH 16 March 1972 [23 April 1971] 12281/72 Heading G2A A photoprinter includes a measuring station 4 for assessing the translucency of an original to be printed, a store I for a control value signal representing the translucency, an exposure station 8 and a drive circuit 50 for conveying the original 2 and a transfer sheet past the exposure station at a speed dependent on the control value signal. Light deflected from printing source 9 is incident on the original and subsequently on photo-cell 5. This voltage is then amplified at 21 and passed through S 1 , actuated on completion of measurement to the signal former comprising. MOSFET 22, capacitor 26 and amplifiers 28, 30. The signal former compares the voltages at A and B and opens MOSFET when A>B to charge the capacitor but closes it through comparator 24 when B>A. The movement of the original to the exposure station actuates transfer regulator 40 through a feeler or other switching device to close switch S 2 and pass the signal from capacitor 26 to capacitor 36 to control the drive circuit 50 through amplifier 38. S 2 is then opened and the original is conveyed past the exposure station. A brake may be provided to allow smooth transitions between different drive speeds. Printing papers of differing photo-sensitivity may be selected, cut and conveyed to the exposure station, in which case, their different characteristics are accounted for by switching in sets of resistors 62, 63 in parallel with amplifier 21. Different filter and diaphragm settings may also be pre-set by switches 65. Switch S 3 actuated by the original movement and resistor 29 are provided to discharge capacitor 26 after each original has passed the measuring station.
GB1228172A 1971-04-23 1972-03-16 Photo-printing machine Expired GB1345454A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2119869A DE2119869C3 (en) 1971-04-23 1971-04-23 Blueprint machine with an integrating measuring device for measuring the transparency of an original to be copied

Publications (1)

Publication Number Publication Date
GB1345454A true GB1345454A (en) 1974-01-30

Family

ID=5805674

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1228172A Expired GB1345454A (en) 1971-04-23 1972-03-16 Photo-printing machine

Country Status (4)

Country Link
US (1) US3756713A (en)
DE (1) DE2119869C3 (en)
GB (1) GB1345454A (en)
IT (1) IT954635B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2204337C3 (en) * 1972-01-31 1985-10-24 Hoechst Ag, 6230 Frankfurt Blueprint machine for spatially separated documents
DE2263952C2 (en) * 1972-12-29 1981-11-12 Hoechst Ag, 6000 Frankfurt Device for the automatic control of the throughput speed of the original and the copy material depending on the transparency of the original in a copier
US4160596A (en) * 1977-10-18 1979-07-10 The United States Of America As Represented By The Secretary Of Commerce Document reproduction illumination/exposure control system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1925355A (en) * 1930-06-09 1933-09-05 Delmar A Whitson Motion picture film printer
US2928327A (en) * 1955-09-01 1960-03-15 Eastman Kodak Co Continuous photographic printer
US3472592A (en) * 1966-10-21 1969-10-14 Gaf Corp Automatic exposure system
US3588247A (en) * 1967-05-17 1971-06-28 Minolta Camera Kk Automatic exposure control device for copying machine
US3642377A (en) * 1969-12-02 1972-02-15 Xerox Corp Color printing system

Also Published As

Publication number Publication date
DE2119869C3 (en) 1978-09-21
DE2119869B2 (en) 1974-02-28
IT954635B (en) 1973-09-15
DE2119869A1 (en) 1972-11-16
US3756713A (en) 1973-09-04

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee