JPS5768851A - Copying device - Google Patents

Copying device

Info

Publication number
JPS5768851A
JPS5768851A JP55145266A JP14526680A JPS5768851A JP S5768851 A JPS5768851 A JP S5768851A JP 55145266 A JP55145266 A JP 55145266A JP 14526680 A JP14526680 A JP 14526680A JP S5768851 A JPS5768851 A JP S5768851A
Authority
JP
Japan
Prior art keywords
scale factor
speed
drum
variable scale
scanning
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.)
Granted
Application number
JP55145266A
Other languages
Japanese (ja)
Other versions
JPH0152751B2 (en
Inventor
Tsuneki Inuzuka
Katsuyoshi Maejima
Masahiro Tomosada
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 JP55145266A priority Critical patent/JPS5768851A/en
Publication of JPS5768851A publication Critical patent/JPS5768851A/en
Publication of JPH0152751B2 publication Critical patent/JPH0152751B2/ja
Granted 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
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/28—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning
    • G03G15/30—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning in which projection is formed on a drum
    • G03G15/305—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning in which projection is formed on a drum with special means to synchronize the scanning optic to the operation of other parts of the machine, e.g. photoreceptor, copy paper

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Variable Magnification In Projection-Type Copying Machines (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)

Abstract

PURPOSE:To increase a copying a speed in a double scale factor or other variable scale factor mode, by controlling a rotary speed of a drum and a scanning speed of a scanning means in accordance with an input data for designating and selecting a variable scale factor. CONSTITUTION:In case the pre-processing has ended and the copy operation has started, a rotary speed of a drum 1, and a scanning speed of scanning means such as an exposure lamp 23, mirror systems 24, 25, a lens 30, etc. are controlled in accordance with a variable scale factor which is designated and selected by a manual input means, and when an equal scale factor data is received, a sequence computer decides it, rotates the drum 1 at a high speed, and in the event of a variable scale factor of reduction and expansion, the drum 1 is delayed by 30msec. and is rotated at a low speed, and subsequently, a lens 30 is set to a desired position. In case of a variable scale factor, the drum 1 is made to execute another rotation in order to perform running-in for switching to a low speed from a high speed, and to stabilize the potential.
JP55145266A 1980-10-17 1980-10-17 Copying device Granted JPS5768851A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55145266A JPS5768851A (en) 1980-10-17 1980-10-17 Copying device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55145266A JPS5768851A (en) 1980-10-17 1980-10-17 Copying device

Publications (2)

Publication Number Publication Date
JPS5768851A true JPS5768851A (en) 1982-04-27
JPH0152751B2 JPH0152751B2 (en) 1989-11-09

Family

ID=15381150

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55145266A Granted JPS5768851A (en) 1980-10-17 1980-10-17 Copying device

Country Status (1)

Country Link
JP (1) JPS5768851A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58195838A (en) * 1982-05-11 1983-11-15 Canon Inc Controller for scanning of document
JPS59159153A (en) * 1983-02-28 1984-09-08 Canon Inc Reproducing and outputting device of image
JPS63101865A (en) * 1986-10-17 1988-05-06 Ricoh Co Ltd Controller for copying machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58195838A (en) * 1982-05-11 1983-11-15 Canon Inc Controller for scanning of document
JPS59159153A (en) * 1983-02-28 1984-09-08 Canon Inc Reproducing and outputting device of image
JPS63101865A (en) * 1986-10-17 1988-05-06 Ricoh Co Ltd Controller for copying machine

Also Published As

Publication number Publication date
JPH0152751B2 (en) 1989-11-09

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