JPS5671180A - Recording paper terminal detection system - Google Patents

Recording paper terminal detection system

Info

Publication number
JPS5671180A
JPS5671180A JP14602279A JP14602279A JPS5671180A JP S5671180 A JPS5671180 A JP S5671180A JP 14602279 A JP14602279 A JP 14602279A JP 14602279 A JP14602279 A JP 14602279A JP S5671180 A JPS5671180 A JP S5671180A
Authority
JP
Japan
Prior art keywords
output
marks
becomes
terminal
level
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
JP14602279A
Other languages
Japanese (ja)
Inventor
Shingo Yamaguchi
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 JP14602279A priority Critical patent/JPS5671180A/en
Publication of JPS5671180A publication Critical patent/JPS5671180A/en
Pending legal-status Critical Current

Links

Landscapes

  • Handling Of Sheets (AREA)
  • Facsimiles In General (AREA)

Abstract

PURPOSE: To detect terminal notice marks surely, by providing plural terminal notice marks on the reverse side of the recording paper terminal and by comparing the read output for them with he read output for no marks and by amplifying the comparision result differentially and by detecting the terminal on a basis of the continuity quantity of these marks.
CONSTITUTION: The output of photosensor 14 for no marks is amplified by amplifirer A and is held in capacitor C (sample hold), and a part of the output becomes the positive input of comparator COM. Simultaneously, the ouput of amplifier A is divided by resistances R2 and R3 and becomes the inversion input of comparator COM. In this case, output S1 of comparator COM is set to a low level. When the recording paper terminal mark is detected, the output of photosensor 14 is lowered, and the inversion input of the comparator becomes small, and output S1 becomes high-level, and counter CTR starts counting clock CP. When high-level S1 continues for a prescribed time, output Q4 becomes high-level to report the paper end.
COPYRIGHT: (C)1981,JPO&Japio
JP14602279A 1979-11-13 1979-11-13 Recording paper terminal detection system Pending JPS5671180A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14602279A JPS5671180A (en) 1979-11-13 1979-11-13 Recording paper terminal detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14602279A JPS5671180A (en) 1979-11-13 1979-11-13 Recording paper terminal detection system

Publications (1)

Publication Number Publication Date
JPS5671180A true JPS5671180A (en) 1981-06-13

Family

ID=15398321

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14602279A Pending JPS5671180A (en) 1979-11-13 1979-11-13 Recording paper terminal detection system

Country Status (1)

Country Link
JP (1) JPS5671180A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5881573A (en) * 1981-11-11 1983-05-16 Nippon Steel Weld Prod & Eng Co Ltd Method for taking out wire for welding

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5881573A (en) * 1981-11-11 1983-05-16 Nippon Steel Weld Prod & Eng Co Ltd Method for taking out wire for welding

Similar Documents

Publication Publication Date Title
JPS5698634A (en) Printed matter testing device
JPS5693079A (en) Measurement of time duration
JPS57166258A (en) Detecting method of residual quantity of roll paper
JPS5671180A (en) Recording paper terminal detection system
JPS57355A (en) Injection timing detector
EP0258735A3 (en) Process circuit for use in voltage-output type sensors
JPS56101564A (en) Noise measuring device of audio element
JPS5512538A (en) Detection method for stylus skip
JPS56126558A (en) Damage detector for cutting tool
JPS5692440A (en) Detecting device for liquid in insulating conduit
JPS57198809A (en) System for improving signal to noise ratio
JPS57164605A (en) Amplifier
JPS51143395A (en) Composite type of sensing an element for detecting a special kind of r educible
JPS5749847A (en) Discriminating device for reducing gas and humidity
JPS5573942A (en) Begining-of-tape setter for recording
JPS5764128A (en) Loose parts monitor
JPS5670245A (en) Double feed detection system
JPS5750312A (en) Phase error detecting circuit
JPS55156807A (en) Length measuring device
JPS5556279A (en) Perforated medium read system
JPS5332068A (en) Signal detecting circuit
JPS57200814A (en) Detection amplifier
JPS5383526A (en) Receiving device for multiple information signal
JPS5622176A (en) Optical mark reading device
JPS5370473A (en) Partial discharge measuring apparatus