CA921151A - Automatic exposure control for copy machine - Google Patents

Automatic exposure control for copy machine

Info

Publication number
CA921151A
CA921151A CA084289A CA84289A CA921151A CA 921151 A CA921151 A CA 921151A CA 084289 A CA084289 A CA 084289A CA 84289 A CA84289 A CA 84289A CA 921151 A CA921151 A CA 921151A
Authority
CA
Canada
Prior art keywords
exposure control
automatic exposure
copy machine
copy
machine
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
CA084289A
Other languages
English (en)
Inventor
S. Lewer Gregory
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Application granted granted Critical
Publication of CA921151A publication Critical patent/CA921151A/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)
CA084289A 1969-06-02 1970-06-01 Automatic exposure control for copy machine Expired CA921151A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US82935669A 1969-06-02 1969-06-02

Publications (1)

Publication Number Publication Date
CA921151A true CA921151A (en) 1973-02-13

Family

ID=25254300

Family Applications (1)

Application Number Title Priority Date Filing Date
CA084289A Expired CA921151A (en) 1969-06-02 1970-06-01 Automatic exposure control for copy machine

Country Status (4)

Country Link
CA (1) CA921151A (enExample)
DE (1) DE2027505A1 (enExample)
FR (1) FR2049709A5 (enExample)
GB (1) GB1304943A (enExample)

Also Published As

Publication number Publication date
DE2027505A1 (de) 1970-12-23
FR2049709A5 (enExample) 1971-03-26
GB1304943A (enExample) 1973-01-31

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