JPS6421467A - Sheet detector - Google Patents

Sheet detector

Info

Publication number
JPS6421467A
JPS6421467A JP62178443A JP17844387A JPS6421467A JP S6421467 A JPS6421467 A JP S6421467A JP 62178443 A JP62178443 A JP 62178443A JP 17844387 A JP17844387 A JP 17844387A JP S6421467 A JPS6421467 A JP S6421467A
Authority
JP
Japan
Prior art keywords
sheet
carrying
discriminating means
pulse
generates
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
JP62178443A
Other languages
Japanese (ja)
Other versions
JPH0786913B2 (en
Inventor
Takashi Naba
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP62178443A priority Critical patent/JPH0786913B2/en
Publication of JPS6421467A publication Critical patent/JPS6421467A/en
Publication of JPH0786913B2 publication Critical patent/JPH0786913B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Counters In Electrophotography And Two-Sided Copying (AREA)
  • Controlling Sheets Or Webs (AREA)

Abstract

PURPOSE:To accurately discriminate the carrying number of sheets, by arranging a detector in a direction orthogonal to the carrying direction of the sheet, and providing a sheet carrying number discriminating means consisting of a pulse generating means which generates a prescribed time pulse corresponding to the detection of the sheet and a circuit which takes the OR of pulses. CONSTITUTION:For example, three reflection type optical sheet detects 10-12 which detect the sheet P to be carried are arranged in line in the direction orthogonal to the sheet carrying direction between carrying belts 4 and 5, and are connected to the sheet carrying number discriminating means 14. The sheet carrying number discriminating means 14 is constituted of the pulse generating means 15-17 consisting of a monostable multivibrator which generates the pulse of time T replying to each rise of the output of the sheet detectors 10-12 and the OR circuit 18 which takes the sum of those pulses. In such a way, it is possible to count the number of carried sheets P by a counter 9 accurately.
JP62178443A 1987-07-17 1987-07-17 Sheet detection device Expired - Fee Related JPH0786913B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62178443A JPH0786913B2 (en) 1987-07-17 1987-07-17 Sheet detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62178443A JPH0786913B2 (en) 1987-07-17 1987-07-17 Sheet detection device

Publications (2)

Publication Number Publication Date
JPS6421467A true JPS6421467A (en) 1989-01-24
JPH0786913B2 JPH0786913B2 (en) 1995-09-20

Family

ID=16048611

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62178443A Expired - Fee Related JPH0786913B2 (en) 1987-07-17 1987-07-17 Sheet detection device

Country Status (1)

Country Link
JP (1) JPH0786913B2 (en)

Also Published As

Publication number Publication date
JPH0786913B2 (en) 1995-09-20

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees