JPS5694367A - Image forming apparatus - Google Patents

Image forming apparatus

Info

Publication number
JPS5694367A
JPS5694367A JP17301979A JP17301979A JPS5694367A JP S5694367 A JPS5694367 A JP S5694367A JP 17301979 A JP17301979 A JP 17301979A JP 17301979 A JP17301979 A JP 17301979A JP S5694367 A JPS5694367 A JP S5694367A
Authority
JP
Japan
Prior art keywords
original
sheet
copying
length
detecting element
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
JP17301979A
Other languages
Japanese (ja)
Inventor
Hiroshi Nitanda
Koichi Miyamoto
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 JP17301979A priority Critical patent/JPS5694367A/en
Publication of JPS5694367A publication Critical patent/JPS5694367A/en
Pending legal-status Critical Current

Links

Landscapes

  • Sheets, Magazines, And Separation Thereof (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE: To eliminate the copying defects owing to noncoincidence of the sizes of an original and transfer paper and improve copying efficiency by detecting the length of the first sheet original and selecting the long one when the transfer sheet shorter than the original is being fed.
CONSTITUTION: A transfer material P is fed by a feed roller 30, and is detected with a detecting element 74 in a position A. Rollers 56, 57 are revolved by this signal, whereby an original O is sent to a conveying path. When the original O reaches a position B, the delivery of the original is detected by a detecting element 60. This detection signal is discriminated of whether the 1st sheet or not by a predetermined electric circuit. When it is the 1st sheet, the length of the original is measured with the detecting element 60, and the cassette of the transfer material corresponding to the length is selected; at the same time, the image forming cycle with the copying of the 2nd and subsequent sheets is determined, and the operating period of a photosensitive drum 8 is determined. Thereby, the correct copying may be made from the 2nd sheet even when the selection of the transfer paper was wrong.
COPYRIGHT: (C)1981,JPO&Japio
JP17301979A 1979-12-27 1979-12-27 Image forming apparatus Pending JPS5694367A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17301979A JPS5694367A (en) 1979-12-27 1979-12-27 Image forming apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17301979A JPS5694367A (en) 1979-12-27 1979-12-27 Image forming apparatus

Publications (1)

Publication Number Publication Date
JPS5694367A true JPS5694367A (en) 1981-07-30

Family

ID=15952691

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17301979A Pending JPS5694367A (en) 1979-12-27 1979-12-27 Image forming apparatus

Country Status (1)

Country Link
JP (1) JPS5694367A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS492543A (en) * 1972-04-19 1974-01-10
JPS4967620A (en) * 1972-10-24 1974-07-01
JPS5344019A (en) * 1976-10-04 1978-04-20 Fuji Xerox Co Ltd Automatic starter for copying machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS492543A (en) * 1972-04-19 1974-01-10
JPS4967620A (en) * 1972-10-24 1974-07-01
JPS5344019A (en) * 1976-10-04 1978-04-20 Fuji Xerox Co Ltd Automatic starter for copying machine

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