JPS564468A - Ink-jet printer - Google Patents

Ink-jet printer

Info

Publication number
JPS564468A
JPS564468A JP7818479A JP7818479A JPS564468A JP S564468 A JPS564468 A JP S564468A JP 7818479 A JP7818479 A JP 7818479A JP 7818479 A JP7818479 A JP 7818479A JP S564468 A JPS564468 A JP S564468A
Authority
JP
Japan
Prior art keywords
detection signal
amplified
adjusting circuit
signal
magnitude
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
JP7818479A
Other languages
Japanese (ja)
Inventor
Hideyuki Omori
Shinji Matsuoka
Mitsuhiro Nakamura
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 filed Critical Hitachi Ltd
Priority to JP7818479A priority Critical patent/JPS564468A/en
Publication of JPS564468A publication Critical patent/JPS564468A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/07—Ink jet characterised by jet control
    • B41J2/115—Ink jet characterised by jet control synchronising the droplet separation and charging time

Abstract

PURPOSE:To omit a gain adjustment operation by a method wherein the magnitude of a phase detection signal outputted from a charged signal generating circuit is adjusted automatically by an adjusting circuit and thereby the output of a voltage amplifier at the time of an optimum phase is always maintained within the normal voltage. CONSTITUTION:After a detection signal from a sensor 8 is amplified by a sensor amplifier 22 of a fixed gain, a required signal portion only is extracted from a low- pass filter 30 and amplified by a voltage amplifier 24. Being converted into a direct current by a smoothing circuit 25, the amplified signal turns to be an output VO and enters comparators 51 and 52, where it is compared with respective standard voltages VF1 and VF2. For instance, when VO is higher than 4V, the detection signal is determined to be ''present''. And, whether or not the setting of an adjusting circuit 50 is the optimum value, is examined by the comparator 52. EFFECT:Manual adjustment is not necessary because the magnitude of the phase detection signal is changed and adjusted automatically by the adjusting circuit corresponding to the charged condition of an ink drip, etc.
JP7818479A 1979-06-22 1979-06-22 Ink-jet printer Pending JPS564468A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7818479A JPS564468A (en) 1979-06-22 1979-06-22 Ink-jet printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7818479A JPS564468A (en) 1979-06-22 1979-06-22 Ink-jet printer

Publications (1)

Publication Number Publication Date
JPS564468A true JPS564468A (en) 1981-01-17

Family

ID=13654880

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7818479A Pending JPS564468A (en) 1979-06-22 1979-06-22 Ink-jet printer

Country Status (1)

Country Link
JP (1) JPS564468A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6153053A (en) * 1984-08-24 1986-03-15 Hitachi Ltd Ink jet recording apparatus
JPH0382364U (en) * 1989-12-14 1991-08-22

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6153053A (en) * 1984-08-24 1986-03-15 Hitachi Ltd Ink jet recording apparatus
JPH0342581B2 (en) * 1984-08-24 1991-06-27
JPH0382364U (en) * 1989-12-14 1991-08-22

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