GB879874A - A method and apparatus for the preparation of photocopies - Google Patents

A method and apparatus for the preparation of photocopies

Info

Publication number
GB879874A
GB879874A GB3574/58A GB357458A GB879874A GB 879874 A GB879874 A GB 879874A GB 3574/58 A GB3574/58 A GB 3574/58A GB 357458 A GB357458 A GB 357458A GB 879874 A GB879874 A GB 879874A
Authority
GB
United Kingdom
Prior art keywords
layer
printed
light
printing
document
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
GB3574/58A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB879874A publication Critical patent/GB879874A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
    • G03C1/46—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein having more than one photosensitive layer
    • 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
    • G03B27/02—Exposure apparatus for contact printing
    • G03B27/14—Details
    • G03B27/30—Details adapted to be combined with processing apparatus
    • G03B27/303—Gas processing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/08—Photoprinting; Processes and means for preventing photoprinting
    • G03C5/10—Reflex-printing; Photoprinting using fluorescent or phosphorescent means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Projection-Type Copiers In General (AREA)

Abstract

879,874. Photographic reflex-printing processes. PFISTER, K., and SCHWIENBACHER, G. Feb. 4, 1958 [May 8, 1957], No. 3574/58. Class 98(2) Positive copies of documents are produced continuously as a film is fed for development between a pair of wetting rollers after a printing exposure and before a second exposure to contact print the developed image on to a second lightsensitive layer. The positive image is produced on development of the second light sensitive layer. As shown, a support 2 having two sensitized layers 1, 3 containing developer is moved past a source 5 of yellow light towards a water bath 6. A document 4 is reflex printed on to layer 1 which alone is sensitized to yellow light. Layer 1 is developed by feeding and wetting rollers 8 and is printed on to layer 3 by source 7 of blue or white light. If the printing is done with white light, layer 1 becomes completely black and may subsequently be bleached or, alternatively, support 2 may consist of two lamina separable by stripping. Blackening of layer 1 to any substantial extent is stated to be prevented if blue light is used. The document may be printed by episcopic projection.
GB3574/58A 1957-05-08 1958-02-04 A method and apparatus for the preparation of photocopies Expired GB879874A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH879874X 1957-05-08

Publications (1)

Publication Number Publication Date
GB879874A true GB879874A (en) 1961-10-11

Family

ID=4544738

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3574/58A Expired GB879874A (en) 1957-05-08 1958-02-04 A method and apparatus for the preparation of photocopies

Country Status (3)

Country Link
BE (1) BE567453A (en)
FR (1) FR1195732A (en)
GB (1) GB879874A (en)

Also Published As

Publication number Publication date
FR1195732A (en) 1959-11-19
BE567453A (en)

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