JPS57161873A - Screen for photographic copying - Google Patents

Screen for photographic copying

Info

Publication number
JPS57161873A
JPS57161873A JP4736581A JP4736581A JPS57161873A JP S57161873 A JPS57161873 A JP S57161873A JP 4736581 A JP4736581 A JP 4736581A JP 4736581 A JP4736581 A JP 4736581A JP S57161873 A JPS57161873 A JP S57161873A
Authority
JP
Japan
Prior art keywords
screen
original mounting
mounting glass
photographic copying
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
JP4736581A
Other languages
Japanese (ja)
Inventor
Shigeru Hara
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
Priority to JP4736581A priority Critical patent/JPS57161873A/en
Publication of JPS57161873A publication Critical patent/JPS57161873A/en
Pending 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
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/04027—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material and forming half-tone image

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Holders For Sensitive Materials And Originals (AREA)

Abstract

PURPOSE:To improve halftone reproduction by providing a screen to the original mounting glass of an electro photographic copying machine. CONSTITUTION:On original mounting glass 1, a screen of white silk is mounted and its circumference is fixed with a rubber frame. In another way, grooves are formed in the original mounting glass 1 and charged with white pigment to form a screen. For copying a photograph, etc., an increase in contrast due to edge effect is prevented by forming mesh points in the screen, thereby obtaining a copy having excellent halftones.
JP4736581A 1981-03-31 1981-03-31 Screen for photographic copying Pending JPS57161873A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4736581A JPS57161873A (en) 1981-03-31 1981-03-31 Screen for photographic copying

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4736581A JPS57161873A (en) 1981-03-31 1981-03-31 Screen for photographic copying

Publications (1)

Publication Number Publication Date
JPS57161873A true JPS57161873A (en) 1982-10-05

Family

ID=12773076

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4736581A Pending JPS57161873A (en) 1981-03-31 1981-03-31 Screen for photographic copying

Country Status (1)

Country Link
JP (1) JPS57161873A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6426832A (en) * 1986-07-02 1989-01-30 Shizuo Yahaba Photograph copying device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6426832A (en) * 1986-07-02 1989-01-30 Shizuo Yahaba Photograph copying device

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