JPS5719765A - Black frame removing device for electrophotographic copier - Google Patents

Black frame removing device for electrophotographic copier

Info

Publication number
JPS5719765A
JPS5719765A JP9425180A JP9425180A JPS5719765A JP S5719765 A JPS5719765 A JP S5719765A JP 9425180 A JP9425180 A JP 9425180A JP 9425180 A JP9425180 A JP 9425180A JP S5719765 A JPS5719765 A JP S5719765A
Authority
JP
Japan
Prior art keywords
plate
photosensitive paper
diodes
black frame
width direction
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
JP9425180A
Other languages
Japanese (ja)
Inventor
Masanori Kai
Satoshi Hisabayashi
Yosuke Igarashi
Hirotoshi Nakada
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.)
Iwatsu Electric Co Ltd
Original Assignee
Iwatsu Electric Co Ltd
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 Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Priority to JP9425180A priority Critical patent/JPS5719765A/en
Publication of JPS5719765A publication Critical patent/JPS5719765A/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
    • G03G15/045—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 with means for charging or discharging distinct portions of the charge pattern on the recording material, e.g. for contrast enhancement or discharging non-image areas
    • G03G15/047—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 with means for charging or discharging distinct portions of the charge pattern on the recording material, e.g. for contrast enhancement or discharging non-image areas for discharging non-image areas

Abstract

PURPOSE:To successively sensitize both side edges and top edge part of photosensitive paper by juxtaposing plural numbers of light sources of a size slightly larger than the largest original in the upper part of an exposure part in the width direction of the photosensitive paper, and selectively lighting these light sources in accordance with a set magnification. CONSTITUTION:A black frame remover 19 is constituted of a bottom plate 30, a pair of vertically opposing covers 31, 32 fixed respectively at one end to one side of the plate 30, a printed circuit board fixed to the plate 30, plural numbers of light emitting diodes 34 juxtaposed in two steps above and below to the substrate 33 along the width direction of photosensitive paper A, and a light shielding plate 35 commonly mounted to the plural diodes 34 on both sides respectively. This is provided at the entrance end of an exposure part, and while the diodes 34 are being controlled in accordance with prescribed magnifications, they are lighted, and unnecessary charge is removed.
JP9425180A 1980-07-10 1980-07-10 Black frame removing device for electrophotographic copier Pending JPS5719765A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9425180A JPS5719765A (en) 1980-07-10 1980-07-10 Black frame removing device for electrophotographic copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9425180A JPS5719765A (en) 1980-07-10 1980-07-10 Black frame removing device for electrophotographic copier

Publications (1)

Publication Number Publication Date
JPS5719765A true JPS5719765A (en) 1982-02-02

Family

ID=14105073

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9425180A Pending JPS5719765A (en) 1980-07-10 1980-07-10 Black frame removing device for electrophotographic copier

Country Status (1)

Country Link
JP (1) JPS5719765A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59182785A (en) * 1983-02-28 1984-10-17 Konishiroku Photo Ind Co Ltd Image receiving element for heat transfer material
JPS6065754U (en) * 1983-10-14 1985-05-10 株式会社リコー Eraser in copiers
JPS60114888A (en) * 1983-11-26 1985-06-21 Canon Inc Illuminating device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59182785A (en) * 1983-02-28 1984-10-17 Konishiroku Photo Ind Co Ltd Image receiving element for heat transfer material
JPH0536779B2 (en) * 1983-02-28 1993-05-31 Konishiroku Photo Ind
JPS6065754U (en) * 1983-10-14 1985-05-10 株式会社リコー Eraser in copiers
JPH0435895Y2 (en) * 1983-10-14 1992-08-25
JPS60114888A (en) * 1983-11-26 1985-06-21 Canon Inc Illuminating device

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