JPS56161244A - Multiple feed detecting device - Google Patents

Multiple feed detecting device

Info

Publication number
JPS56161244A
JPS56161244A JP6507380A JP6507380A JPS56161244A JP S56161244 A JPS56161244 A JP S56161244A JP 6507380 A JP6507380 A JP 6507380A JP 6507380 A JP6507380 A JP 6507380A JP S56161244 A JPS56161244 A JP S56161244A
Authority
JP
Japan
Prior art keywords
light
papers
piles
put together
distribution
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
JP6507380A
Other languages
Japanese (ja)
Inventor
Seiji Inuyama
Kiyokazu Hanatani
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP6507380A priority Critical patent/JPS56161244A/en
Publication of JPS56161244A publication Critical patent/JPS56161244A/en
Pending legal-status Critical Current

Links

Landscapes

  • Controlling Sheets Or Webs (AREA)

Abstract

PURPOSE: To make it possible to detect, with a relatively simple mechanism, feeding of more than two pieces irrespective of thickness of paper, by detecting distribution of reflecting light in the direction where light is applied onto edge surface of papers which are put together in piles.
CONSTITUTION: A light emitted from a light transmitter LT is applied onto edge surfaces of papers PP1 and PP2 which are put together in piles, and distribution of reflecting light in the direction where the papers PP1 and PP2 are put together in piles is detected by a light amount detector DET. In a normal condition when only the paper PP1 is processed, output of the light amount detector is to be located only on a mount of much quantity of reflecting light. In case if the papers PP1 and PP2 were fed by being put together in piles, distribution of reflecting light makes two mounts containing less quantity of reflection in the middle. And therefore, by processing with a device which processes output signal of the light amount detector DET, it is possible to detect feeding of more than two pieces of papers.
COPYRIGHT: (C)1981,JPO&Japio
JP6507380A 1980-05-16 1980-05-16 Multiple feed detecting device Pending JPS56161244A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6507380A JPS56161244A (en) 1980-05-16 1980-05-16 Multiple feed detecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6507380A JPS56161244A (en) 1980-05-16 1980-05-16 Multiple feed detecting device

Publications (1)

Publication Number Publication Date
JPS56161244A true JPS56161244A (en) 1981-12-11

Family

ID=13276404

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6507380A Pending JPS56161244A (en) 1980-05-16 1980-05-16 Multiple feed detecting device

Country Status (1)

Country Link
JP (1) JPS56161244A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05294513A (en) * 1992-04-17 1993-11-09 Fuji Photo Film Co Ltd Double feeding detection device for automatic paper sheet feeding device
JPH0656313A (en) * 1991-05-14 1994-03-01 Fuji Xerox Co Ltd Sheet detecting device
US5806649A (en) * 1994-06-15 1998-09-15 Coin Bill Validator, Inc. Paper currency validator
US6144038A (en) * 1998-03-23 2000-11-07 Heidelberger Druckmaschinen Aktiengesellschaft Method and device for detecting the position of stacked material
EP1223132A2 (en) * 2001-01-15 2002-07-17 Leuze electronic GmbH + Co. Optoelectric device
JP2012035953A (en) * 2010-08-05 2012-02-23 Ricoh Co Ltd Sheet type discriminating device, sheet feeder, and image forming apparatus
JP2012035951A (en) * 2010-08-05 2012-02-23 Ricoh Co Ltd Sheet thickness discriminating device, sheet feeder, and image forming apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0656313A (en) * 1991-05-14 1994-03-01 Fuji Xerox Co Ltd Sheet detecting device
JPH05294513A (en) * 1992-04-17 1993-11-09 Fuji Photo Film Co Ltd Double feeding detection device for automatic paper sheet feeding device
US5806649A (en) * 1994-06-15 1998-09-15 Coin Bill Validator, Inc. Paper currency validator
US6144038A (en) * 1998-03-23 2000-11-07 Heidelberger Druckmaschinen Aktiengesellschaft Method and device for detecting the position of stacked material
EP1223132A2 (en) * 2001-01-15 2002-07-17 Leuze electronic GmbH + Co. Optoelectric device
EP1223132A3 (en) * 2001-01-15 2003-11-05 Leuze electronic GmbH + Co. Optoelectric device
JP2012035953A (en) * 2010-08-05 2012-02-23 Ricoh Co Ltd Sheet type discriminating device, sheet feeder, and image forming apparatus
JP2012035951A (en) * 2010-08-05 2012-02-23 Ricoh Co Ltd Sheet thickness discriminating device, sheet feeder, and image forming apparatus

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