JPS5766451A - Copying machine - Google Patents

Copying machine

Info

Publication number
JPS5766451A
JPS5766451A JP55143253A JP14325380A JPS5766451A JP S5766451 A JPS5766451 A JP S5766451A JP 55143253 A JP55143253 A JP 55143253A JP 14325380 A JP14325380 A JP 14325380A JP S5766451 A JPS5766451 A JP S5766451A
Authority
JP
Japan
Prior art keywords
speed
photoreceptor
moving
electricity
area
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
JP55143253A
Other languages
Japanese (ja)
Inventor
Shinkichi Takahashi
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP55143253A priority Critical patent/JPS5766451A/en
Publication of JPS5766451A publication Critical patent/JPS5766451A/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
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0275—Arrangements for controlling the area of the photoconductor to be charged
    • 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
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0291—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices corona discharge devices, e.g. wires, pointed electrodes, means for cleaning the corona discharge device

Abstract

PURPOSE:To make clear a boundary between a charged and an uncharged area, by controlling a charger by an electricity shielding member and by moving a boundary between the electricity-shield area and charged area of an image carrier at the same speed as the moving speed of the image carrier. CONSTITUTION:When an operator pushes a copy button, a lamp turns on and an electricity shielding member 18 is positioned as shown in a figure (a), so that corona discharge by a sensitizing charger 111 to a photoreceptor 8 turning at a speed V as shown by an arrow is cur off. Then, an original table 1 starts moving at the speed V and when the distance from the rear end part of the member 18 to the exposure point of an exposure part 16 is coincident with the distance L from a scanning point D to the end point E which is at the front end part of an original and has picture blank width L1, a microswitch 202 is turned on to move the member 18 in parallel as shown by the soild lines at the same speed V as the moving speed of the photoreceptor. Further, the member 18 is arranged close to or in contact with the photoreceptor 8.
JP55143253A 1980-10-13 1980-10-13 Copying machine Pending JPS5766451A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55143253A JPS5766451A (en) 1980-10-13 1980-10-13 Copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55143253A JPS5766451A (en) 1980-10-13 1980-10-13 Copying machine

Publications (1)

Publication Number Publication Date
JPS5766451A true JPS5766451A (en) 1982-04-22

Family

ID=15334439

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55143253A Pending JPS5766451A (en) 1980-10-13 1980-10-13 Copying machine

Country Status (1)

Country Link
JP (1) JPS5766451A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6234174A (en) * 1985-08-05 1987-02-14 オセ−ネ−デルランド・ベ−・ヴエ− Copying equipment with adjustable margin setting means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6234174A (en) * 1985-08-05 1987-02-14 オセ−ネ−デルランド・ベ−・ヴエ− Copying equipment with adjustable margin setting means

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