JPS55146777A - Faulty-printing monitoring device for line printer - Google Patents

Faulty-printing monitoring device for line printer

Info

Publication number
JPS55146777A
JPS55146777A JP5350479A JP5350479A JPS55146777A JP S55146777 A JPS55146777 A JP S55146777A JP 5350479 A JP5350479 A JP 5350479A JP 5350479 A JP5350479 A JP 5350479A JP S55146777 A JPS55146777 A JP S55146777A
Authority
JP
Japan
Prior art keywords
printing
signal
faulty
striking
flight
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
JP5350479A
Other languages
Japanese (ja)
Inventor
Nushito Takahashi
Isao Nakajima
Shunji Murano
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.)
Koki Holdings Co Ltd
Hitachi Ltd
Original Assignee
Hitachi Ltd
Hitachi Koki 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 Hitachi Ltd, Hitachi Koki Co Ltd filed Critical Hitachi Ltd
Priority to JP5350479A priority Critical patent/JPS55146777A/en
Publication of JPS55146777A publication Critical patent/JPS55146777A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain the captioned device capable of automatically securing the quality of printing and surely detecting faulty printing by monitoring the flight time of each hammer of a line printer and thus detecting faulty printing such as an omission and shear in printing as well as breaking of hammers.
CONSTITUTION: The striking force detected by a striking-force detecting element 7 is shaped into a striking signal D and the judgement is made in an AND circuit 17 whether it is found within the pulse width of a flight-time allowed fluctuation signal C from a monostable multivibtator 13. When a faulty-striking signal D1 which fails to enter the pulse width of the signal C is given, a flight-time judging signal E is not outputted to a flip-flop circuit 18, a printing-instruction judging signal F does not rise and, being held at a low level, is not outputted to an AND circuit 10, and the coil 19 of the electromagnetic device of the printer is not excited. As a result, an omission, shear in printing or the breaking of a hammer is detected and the continuation of such a faulty printing operation is prevented.
COPYRIGHT: (C)1980,JPO&Japio
JP5350479A 1979-05-02 1979-05-02 Faulty-printing monitoring device for line printer Pending JPS55146777A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5350479A JPS55146777A (en) 1979-05-02 1979-05-02 Faulty-printing monitoring device for line printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5350479A JPS55146777A (en) 1979-05-02 1979-05-02 Faulty-printing monitoring device for line printer

Publications (1)

Publication Number Publication Date
JPS55146777A true JPS55146777A (en) 1980-11-15

Family

ID=12944648

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5350479A Pending JPS55146777A (en) 1979-05-02 1979-05-02 Faulty-printing monitoring device for line printer

Country Status (1)

Country Link
JP (1) JPS55146777A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63116882A (en) * 1986-10-31 1988-05-21 インターナシヨナル・ビジネス・マシーンズ・コーポレーシヨン Impact type printer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63116882A (en) * 1986-10-31 1988-05-21 インターナシヨナル・ビジネス・マシーンズ・コーポレーシヨン Impact type printer

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