JPS55153951A - Original size detecting method - Google Patents

Original size detecting method

Info

Publication number
JPS55153951A
JPS55153951A JP6195079A JP6195079A JPS55153951A JP S55153951 A JPS55153951 A JP S55153951A JP 6195079 A JP6195079 A JP 6195079A JP 6195079 A JP6195079 A JP 6195079A JP S55153951 A JPS55153951 A JP S55153951A
Authority
JP
Japan
Prior art keywords
original
photosensor
scanning
scan
counter
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
JP6195079A
Other languages
Japanese (ja)
Other versions
JPS6342767B2 (en
Inventor
Hiroo Ueda
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP6195079A priority Critical patent/JPS55153951A/en
Publication of JPS55153951A publication Critical patent/JPS55153951A/en
Publication of JPS6342767B2 publication Critical patent/JPS6342767B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Holders For Sensitive Materials And Originals (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE: To detect the size of an original, by scanning the original in the direction reverse to the exposure scanning direction using a photosensor functioning in the invisible region in order to detect the edge of the original.
CONSTITUTION: An optical system is moved in direction arrow 1 to scan the original. At the same time, photosensor 4 is moved in direction arrow 2 to scan the original by emitting infrared rays toward original platen glass 1 and receiving the reflected rays. FF5 is set by a count start signal, its output actuates amplifier 6 and delivers to reset input terminal R. Fundamental clock passes through AND circuit 7 and is counted by the output of FF5 in counter 8. Photosensor 4 scans original pressing cover 3 and original 2 in the direction reverse to that of original scanning, and the contents of counter 8 indicate the position of left side edge of original 2, i.e. the size of original 2.
COPYRIGHT: (C)1980,JPO&Japio
JP6195079A 1979-05-19 1979-05-19 Original size detecting method Granted JPS55153951A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6195079A JPS55153951A (en) 1979-05-19 1979-05-19 Original size detecting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6195079A JPS55153951A (en) 1979-05-19 1979-05-19 Original size detecting method

Publications (2)

Publication Number Publication Date
JPS55153951A true JPS55153951A (en) 1980-12-01
JPS6342767B2 JPS6342767B2 (en) 1988-08-25

Family

ID=13185978

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6195079A Granted JPS55153951A (en) 1979-05-19 1979-05-19 Original size detecting method

Country Status (1)

Country Link
JP (1) JPS55153951A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59224857A (en) * 1982-12-22 1984-12-17 インタ−ナシヨナル　ビジネス　マシ−ンズ　コ−ポレ−シヨン Electrostatic type image generator
JPS6021041A (en) * 1983-07-14 1985-02-02 Konishiroku Photo Ind Co Ltd Original detector of copying machine
JPS60156054A (en) * 1983-12-21 1985-08-16 Sharp Corp Automatic exposure adjusting device
JPS61143735A (en) * 1984-12-17 1986-07-01 Canon Inc Original detector
JPS61143737A (en) * 1984-12-17 1986-07-01 Canon Inc Original detector
JPS61143736A (en) * 1984-12-17 1986-07-01 Canon Inc Original detector

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52120611A (en) * 1976-04-02 1977-10-11 Toshiba Corp Paper choke detector
JPS53126633U (en) * 1977-03-15 1978-10-07
JPS53138740A (en) * 1977-05-10 1978-12-04 Canon Inc Recorder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52120611A (en) * 1976-04-02 1977-10-11 Toshiba Corp Paper choke detector
JPS53126633U (en) * 1977-03-15 1978-10-07
JPS53138740A (en) * 1977-05-10 1978-12-04 Canon Inc Recorder

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59224857A (en) * 1982-12-22 1984-12-17 インタ−ナシヨナル　ビジネス　マシ−ンズ　コ−ポレ−シヨン Electrostatic type image generator
JPH0252259B2 (en) * 1982-12-22 1990-11-13 Intaanashonaru Bijinesu Mashiinzu Corp
JPS6021041A (en) * 1983-07-14 1985-02-02 Konishiroku Photo Ind Co Ltd Original detector of copying machine
JPS60156054A (en) * 1983-12-21 1985-08-16 Sharp Corp Automatic exposure adjusting device
JPS61143735A (en) * 1984-12-17 1986-07-01 Canon Inc Original detector
JPS61143737A (en) * 1984-12-17 1986-07-01 Canon Inc Original detector
JPS61143736A (en) * 1984-12-17 1986-07-01 Canon Inc Original detector

Also Published As

Publication number Publication date
JPS6342767B2 (en) 1988-08-25

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