JPS56111409A - Detection system for used amount of roll of paper - Google Patents

Detection system for used amount of roll of paper

Info

Publication number
JPS56111409A
JPS56111409A JP1422380A JP1422380A JPS56111409A JP S56111409 A JPS56111409 A JP S56111409A JP 1422380 A JP1422380 A JP 1422380A JP 1422380 A JP1422380 A JP 1422380A JP S56111409 A JPS56111409 A JP S56111409A
Authority
JP
Japan
Prior art keywords
roll
paper
counter
detecting means
used amount
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
JP1422380A
Other languages
Japanese (ja)
Inventor
Shuichi Kasai
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 JP1422380A priority Critical patent/JPS56111409A/en
Publication of JPS56111409A publication Critical patent/JPS56111409A/en
Pending legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

PURPOSE: To display the used or remaining amount of a roll of paper accurately at any time by counting the rotational frequency of the roll of paper by a counter, and by detecting the variation of the diameter of the roll of paper by a speed detecting means and frequency-ratio measuring counter.
CONSTITUTION: Pulse signal Sp from rotational frequency detecting means 5 consisting of sensor 4 and one line 3 drawn on the flank of roll 1 of paper is passed through AND gate 12 and corrected by delay circuit 13 as to the rotating speed of roll 1 of paper, and then integrating counter 6 goes up right after the start of the use, so that display part 7 will display the used amount of the roll. Frequency signal Sf from speed detecting means 11 consisting of photosensor 10 and black-and-white pattern 9 formed on paper pipe 8 of roll 1 of paper 1 and signals from oscillator 14 and timing control circuit 15 are passed through AND gate 16 and correcting counter 17 to output corrected signal Sh to delay circuit 13. Consequently, display part 7 displays the used amount (or remaining amount) of the roll 1 of paper accurately at any time.
COPYRIGHT: (C)1981,JPO&Japio
JP1422380A 1980-02-07 1980-02-07 Detection system for used amount of roll of paper Pending JPS56111409A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1422380A JPS56111409A (en) 1980-02-07 1980-02-07 Detection system for used amount of roll of paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1422380A JPS56111409A (en) 1980-02-07 1980-02-07 Detection system for used amount of roll of paper

Publications (1)

Publication Number Publication Date
JPS56111409A true JPS56111409A (en) 1981-09-03

Family

ID=11855061

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1422380A Pending JPS56111409A (en) 1980-02-07 1980-02-07 Detection system for used amount of roll of paper

Country Status (1)

Country Link
JP (1) JPS56111409A (en)

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