JPS5537675A - Form detector - Google Patents

Form detector

Info

Publication number
JPS5537675A
JPS5537675A JP11092778A JP11092778A JPS5537675A JP S5537675 A JPS5537675 A JP S5537675A JP 11092778 A JP11092778 A JP 11092778A JP 11092778 A JP11092778 A JP 11092778A JP S5537675 A JPS5537675 A JP S5537675A
Authority
JP
Japan
Prior art keywords
time constant
circuit
output
constant circuit
existence
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
JP11092778A
Other languages
Japanese (ja)
Inventor
Yukio Sakano
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 JP11092778A priority Critical patent/JPS5537675A/en
Publication of JPS5537675A publication Critical patent/JPS5537675A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To make it possible to detect not only the existence of a form but also double feeding by making a comparison between the outputs of two time constant circuits differing in time constant.
CONSTITUTION: Form 2 being fed in the direction A is held between feed rollers 11 and 12, and 13 and 14 and light emitting device 3 on one side is confronted to photo detector 4 on the other side. The output of photo detector 4 is supplied to the 1st time contant circuit 8 and peak detector 9 both. Output (f) of peak detector 9 is further passed through the 2nd time constant circuit 10 having a larger time constant than that of the 1st time constant circuit 8. Then, comparing output (e) of the 1st time constant circuit 8 and that (g) of the 2nd time constant circuit 10 in level by comparator 7 can obtain signal (h) on the existence of form 2.
COPYRIGHT: (C)1980,JPO&Japio
JP11092778A 1978-09-09 1978-09-09 Form detector Pending JPS5537675A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11092778A JPS5537675A (en) 1978-09-09 1978-09-09 Form detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11092778A JPS5537675A (en) 1978-09-09 1978-09-09 Form detector

Publications (1)

Publication Number Publication Date
JPS5537675A true JPS5537675A (en) 1980-03-15

Family

ID=14548132

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11092778A Pending JPS5537675A (en) 1978-09-09 1978-09-09 Form detector

Country Status (1)

Country Link
JP (1) JPS5537675A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59180091U (en) * 1983-05-18 1984-12-01 積水化学工業株式会社 curved pipe
JPS62126763A (en) * 1985-11-27 1987-06-09 Nec Corp Facsimile equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59180091U (en) * 1983-05-18 1984-12-01 積水化学工業株式会社 curved pipe
JPS62126763A (en) * 1985-11-27 1987-06-09 Nec Corp Facsimile equipment

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