JPS56117942A - Abnormal sheet material detector in sheet material processor - Google Patents

Abnormal sheet material detector in sheet material processor

Info

Publication number
JPS56117942A
JPS56117942A JP2187480A JP2187480A JPS56117942A JP S56117942 A JPS56117942 A JP S56117942A JP 2187480 A JP2187480 A JP 2187480A JP 2187480 A JP2187480 A JP 2187480A JP S56117942 A JPS56117942 A JP S56117942A
Authority
JP
Japan
Prior art keywords
sheet material
circuit
output
storage circuit
detection value
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
JP2187480A
Other languages
Japanese (ja)
Other versions
JPS5842091B2 (en
Inventor
Tetsuo Onishi
Yoshihide Sugiyama
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.)
Duplo Seiko Corp
Original Assignee
Duplo Seiko Corp
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 Duplo Seiko Corp filed Critical Duplo Seiko Corp
Priority to JP55021874A priority Critical patent/JPS5842091B2/en
Publication of JPS56117942A publication Critical patent/JPS56117942A/en
Publication of JPS5842091B2 publication Critical patent/JPS5842091B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To prevent a malfunction caused by a change in the feed rate of sheet material and in the drift of a circuit by using the detection value of the n-th sheet material as a reference value to be compared with that of the (n+1)-th sheet material.
CONSTITUTION: When the front edge of the second sheet material S2 arrives between a radiation light emitting diode 42 and a photodiode 44, a storage circuit 56a sample-holds the detection value output e02 of an amplification circuit 4 using the sample pulses from a timing circuit 52a. On the other hand, since the signals for the first sheet material are not entered into a timing circuit 58, a storage circuit 57a continues holding the stored detection value output e01 of the first sheet material. Consequently, a comparator circuit 54a compares the output e02' of the amplification circuit 4 with the output e01 when the rear edge of the sheet material S2 passes through the detectors 42 and 44. Subsequently, the output e02 of the storage circuit 56a is transferred to the storage circuit 57a and is used as a reference value.
COPYRIGHT: (C)1981,JPO&Japio
JP55021874A 1980-02-23 1980-02-23 Abnormal sheet material detection device in sheet material processing machine Expired JPS5842091B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55021874A JPS5842091B2 (en) 1980-02-23 1980-02-23 Abnormal sheet material detection device in sheet material processing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55021874A JPS5842091B2 (en) 1980-02-23 1980-02-23 Abnormal sheet material detection device in sheet material processing machine

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP57209917A Division JPS58212539A (en) 1982-11-29 1982-11-29 Abnormal sheet material detecting device in sheet material processing machine

Publications (2)

Publication Number Publication Date
JPS56117942A true JPS56117942A (en) 1981-09-16
JPS5842091B2 JPS5842091B2 (en) 1983-09-17

Family

ID=12067266

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55021874A Expired JPS5842091B2 (en) 1980-02-23 1980-02-23 Abnormal sheet material detection device in sheet material processing machine

Country Status (1)

Country Link
JP (1) JPS5842091B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6036249A (en) * 1983-08-08 1985-02-25 Fuji Syst Kiki Kk Device for monitoring movement of thin sheet
JPH02147546A (en) * 1988-08-12 1990-06-06 Laurel Bank Mach Co Ltd Paper discriminating device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5245103A (en) * 1975-09-02 1977-04-09 Voest Ag Scraper
JPS5315914A (en) * 1976-07-27 1978-02-14 Canon Kk Abnormal transference detector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5245103A (en) * 1975-09-02 1977-04-09 Voest Ag Scraper
JPS5315914A (en) * 1976-07-27 1978-02-14 Canon Kk Abnormal transference detector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6036249A (en) * 1983-08-08 1985-02-25 Fuji Syst Kiki Kk Device for monitoring movement of thin sheet
JPS64292B2 (en) * 1983-08-08 1989-01-06 Fuji Shisutemu Kiki Kk
JPH02147546A (en) * 1988-08-12 1990-06-06 Laurel Bank Mach Co Ltd Paper discriminating device

Also Published As

Publication number Publication date
JPS5842091B2 (en) 1983-09-17

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term
S533 Written request for registration of change of name

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