JPS57190961A - Controlling device of copying device - Google Patents

Controlling device of copying device

Info

Publication number
JPS57190961A
JPS57190961A JP56076036A JP7603681A JPS57190961A JP S57190961 A JPS57190961 A JP S57190961A JP 56076036 A JP56076036 A JP 56076036A JP 7603681 A JP7603681 A JP 7603681A JP S57190961 A JPS57190961 A JP S57190961A
Authority
JP
Japan
Prior art keywords
overlapped
frequency
exceeds
error
roller
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
JP56076036A
Other languages
Japanese (ja)
Inventor
Masaaki Ogura
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 JP56076036A priority Critical patent/JPS57190961A/en
Publication of JPS57190961A publication Critical patent/JPS57190961A/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
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6529—Transporting

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Controlling Sheets Or Webs (AREA)

Abstract

PURPOSE:To judge failures of said detecting means under the condition that an operation frequency exceeds a prescribed frequency, by counting the operation frequency of detecting means for sheet overlapped feeding. CONSTITUTION:When >=2 transfer sheets are transported in an overlapped state, a supplying roller 16a is displaced, and a light screening plate 73a moves through a pressurizing lever 71 and an extending lever 73, therefore the amount of light of an LED incident to a photodetector PT varies. In order to cancel an error owing to an irregularity on a surface of the roller 16a, output signals of the element PT are integrated only for a time of one roller revolving. When the value exceeds a set value, it is judged as an overlapped feed. When a frequency of detecting of overlapped feeding exceeds a prescribed value, it is judged as a detect error and a display of an error, a stop of a machine and a stop of counter operation are performed.
JP56076036A 1981-05-20 1981-05-20 Controlling device of copying device Pending JPS57190961A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56076036A JPS57190961A (en) 1981-05-20 1981-05-20 Controlling device of copying device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56076036A JPS57190961A (en) 1981-05-20 1981-05-20 Controlling device of copying device

Publications (1)

Publication Number Publication Date
JPS57190961A true JPS57190961A (en) 1982-11-24

Family

ID=13593582

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56076036A Pending JPS57190961A (en) 1981-05-20 1981-05-20 Controlling device of copying device

Country Status (1)

Country Link
JP (1) JPS57190961A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61113076A (en) * 1984-11-08 1986-05-30 Canon Inc Image recording device
JPS61156151A (en) * 1984-12-28 1986-07-15 Canon Inc Picture recording device
JPS62143066A (en) * 1985-12-17 1987-06-26 Fuji Xerox Co Ltd Electrophotographic copying machine
JPH03158342A (en) * 1989-11-13 1991-07-08 Canon Inc Sheet conveying device
US20090257800A1 (en) * 2008-04-09 2009-10-15 Fuji Xerox Co., Ltd. Position detection apparatus, paper thickness detection apparatus, belt position detection apparatus, and image forming apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61113076A (en) * 1984-11-08 1986-05-30 Canon Inc Image recording device
JPS61156151A (en) * 1984-12-28 1986-07-15 Canon Inc Picture recording device
JPS62143066A (en) * 1985-12-17 1987-06-26 Fuji Xerox Co Ltd Electrophotographic copying machine
JPH03158342A (en) * 1989-11-13 1991-07-08 Canon Inc Sheet conveying device
US20090257800A1 (en) * 2008-04-09 2009-10-15 Fuji Xerox Co., Ltd. Position detection apparatus, paper thickness detection apparatus, belt position detection apparatus, and image forming apparatus
US8706018B2 (en) * 2008-04-09 2014-04-22 Fuji Xerox Co., Ltd. Position detection apparatus, paper thickness detection apparatus, belt position detection apparatus, and image forming apparatus

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