US3833910A - Ink drop printer charge compensation - Google Patents

Ink drop printer charge compensation Download PDF

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Publication number
US3833910A
US3833910A US00370884A US37088473A US3833910A US 3833910 A US3833910 A US 3833910A US 00370884 A US00370884 A US 00370884A US 37088473 A US37088473 A US 37088473A US 3833910 A US3833910 A US 3833910A
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US
United States
Prior art keywords
drop
drops
charging
charge
clock
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.)
Expired - Lifetime
Application number
US00370884A
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English (en)
Inventor
W Chen
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Priority to US00370884A priority Critical patent/US3833910A/en
Priority to FR7414316A priority patent/FR2233183B1/fr
Priority to IT21707/74A priority patent/IT1009959B/it
Priority to SE7405626A priority patent/SE386522B/xx
Priority to GB1904174A priority patent/GB1431136A/en
Priority to AU68570/74A priority patent/AU474940B2/en
Priority to CH657374A priority patent/CH569588A5/xx
Priority to NL7407344A priority patent/NL7407344A/xx
Priority to JP6299774A priority patent/JPS5412299B2/ja
Priority to CA201,976A priority patent/CA1001215A/en
Priority to DE19742428461 priority patent/DE2428461C3/de
Application granted granted Critical
Publication of US3833910A publication Critical patent/US3833910A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B41J2/075—Ink jet characterised by jet control for many-valued deflection

Definitions

  • This invention relates generally to ink jet printing and it has reference in particular to means for and a method of compensating for the adverse effects of a just charged drop on a following drop or drops.
  • this invention provides for controlling the interaction between successive charged drops in an ink jet printer by placing a negative charge on a discard drop between them.
  • Another object of the invention is to provide for utilizing a fractional portion of the clock pulses producing ink drops for placing charges on drops separated by one or more drops, and placing a negative charge on one of the intervening drops which is related to the charge on the preceding charged drop.
  • Yet another object of the invention is to provide for using both, pulses derived from a clock driving a drop forming transducer, and inverted clock pulses, for gating character generating signals to an operational amplifier connected to a drop charging electrode in an ink jet printer.
  • Still another object of the invention is to provide for dividing the clock pulses driving an ink drop transducer into half and using these pulses, directly with one gate,
  • FIG. 1 is a schematic representation of a drop form ing nozzle and a charging electrode in an ink jet printer.
  • FIG. 5 shows a similar curve using every third drop and the other one of the intervening drops for charge compensation.
  • FIG. 6 is a schematic circuit diagram of a compensation control circuit according to the invention and used with the nozzle and charging electrode of FIG. 1;
  • FIG. 7 shows characteristic curves of the various signals in the circuit of FIG. 6
  • the charging voltages become modified as shown in FIG. 3 by the negative intervening compensating voltages V V and V; being respectively equal to -a X V,,, -a X V and a X V, respectively.
  • a compensating voltage V .B X Va and V, B X V may be used on the drops following the drops charged to the voltages V, and V
  • Charging voltages V and V may be used which immediately precede the charging-voltages V, and V, with like effect.
  • a differential amplifier 26 may be connected between the digital to analog converter 22 and the charging electrode 24.
  • a drop clock or oscillator 30 is connected by a divider 32 (which divides the clock pulse by two) to the data source 20 and to an analog gate 34 connected between the digital to analog converter 22 and the differential amplifier 26.
  • An inverter 36 is connected between the divider 32 and a second analog gate 38, which is connected to the other input of the differential amplifier.
  • the clock 20 has an output frequency on the order of KHz which is within the range of 5-200 KHz disclosed in U.S. Pat. No. 3,298,030 which issued on Jan. l0, 1967 to A. M. Lewis, et al. represented by the curve CL then the output of the divider 32 will be represented by the curve DI.
  • the output charging voltage V, from the analog gate 34 comprises a plurality of successively increasing 10 volt steps and will be represented by the curve 40, and the compensating voltage output V comprising negative step signals on the order of one fourth of the value of the preceding V, signal, is represented by the curve 42 from the analog gate 38.
  • the resultant voltage V, applied to the charging electrode 24 will be represented by the curve 44 having successively increasing 10 volt positive steps and successively increaseing 2.5 volt negative steps therebetween.
  • a method of drop charge compensation in an ink drop printer comprising the steps of i charging spaced apart drops with positive data sig- 'nals, leaving at least one other drop between each data signal charged drop, and 1 y I charging said other drops with a charge proportional to but of the opposite polarity ofthe charge on a preceding signal charged drop to negative the effect of one positively charged data signal drop on an adjacent positively charged data signal drop.
  • the method of drop charge compensation in an ink drop printer which comprises the steps of producing ink drops at predetermined spaced intervals, v charging selected ones of said ink drops which are separated by at least one intervening drop, with data signals for printing, and v charging at least one of said intervening drops between each pair of data signal charged drops with a charge proportional to but of the opposite polarity of the preceding one of said data signal charged drop, to negative the effect of said one data signal charged drop on an adjacent data signal charged drop.
  • transducer means associated with said nozzle for producing varicosities in said stream to insure uniform drop formation
  • a charging electrode positioned in spaced relation with said nozzle for charging selected ones of said drops
  • deflection means providing a field to deflect said charged drops
  • circuit means connected between said charging electrode, and said source of data signals and said clockmeans to charge selected spaced apart drops from said source for printing and other drops between said 5 by said circuit means including a digital to analog converter and an operational amplifier connected to effect energization of said charging electrode from said source.
  • circuit means including gate means connecting said converter and said clock means to said amplifier.
  • circuit means including an inverter connecting said clock means to one of said gate means.
  • circuit means including means dividing said clock pulses connecting said clock means to said gate means.

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Facsimile Heads (AREA)
  • Fax Reproducing Arrangements (AREA)
US00370884A 1973-06-18 1973-06-18 Ink drop printer charge compensation Expired - Lifetime US3833910A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US00370884A US3833910A (en) 1973-06-18 1973-06-18 Ink drop printer charge compensation
FR7414316A FR2233183B1 (ja) 1973-06-18 1974-04-12
IT21707/74A IT1009959B (it) 1973-06-18 1974-04-22 Compensazione delle cariche in una stampatrice a goccioline d inchio stro
SE7405626A SE386522B (sv) 1973-06-18 1974-04-26 Metod for fergstraletryckning samt anordning for tillempning av metoden
GB1904174A GB1431136A (en) 1973-06-18 1974-05-01 Liquid droplet recording appratus
AU68570/74A AU474940B2 (en) 1973-06-18 1974-05-03 Ink drop printer charge compensation
CH657374A CH569588A5 (ja) 1973-06-18 1974-05-14
NL7407344A NL7407344A (ja) 1973-06-18 1974-05-31
JP6299774A JPS5412299B2 (ja) 1973-06-18 1974-06-05
CA201,976A CA1001215A (en) 1973-06-18 1974-06-07 Ink drop printer charge compensation
DE19742428461 DE2428461C3 (de) 1973-06-18 1974-06-12 Vorrichtung zur Kompensation des Einflusses der Ladung vorhergehender Tintentropfen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00370884A US3833910A (en) 1973-06-18 1973-06-18 Ink drop printer charge compensation

Publications (1)

Publication Number Publication Date
US3833910A true US3833910A (en) 1974-09-03

Family

ID=23461586

Family Applications (1)

Application Number Title Priority Date Filing Date
US00370884A Expired - Lifetime US3833910A (en) 1973-06-18 1973-06-18 Ink drop printer charge compensation

Country Status (10)

Country Link
US (1) US3833910A (ja)
JP (1) JPS5412299B2 (ja)
AU (1) AU474940B2 (ja)
CA (1) CA1001215A (ja)
CH (1) CH569588A5 (ja)
FR (1) FR2233183B1 (ja)
GB (1) GB1431136A (ja)
IT (1) IT1009959B (ja)
NL (1) NL7407344A (ja)
SE (1) SE386522B (ja)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4032924A (en) * 1974-10-31 1977-06-28 Nippon Telegraph And Telephone Public Corporation Distortion reduction in ink jet system printer
US4080606A (en) * 1975-05-09 1978-03-21 Hitachi, Ltd. Ink jet printer
US4086601A (en) * 1976-03-30 1978-04-25 International Business Machines Corporation Sequential ink jet printing system with variable number of guard drops
US4157551A (en) * 1974-10-31 1979-06-05 Nippon Telegraph And Telephone Public Corporation Distortion reduction in ink jet system printer
US4217595A (en) * 1978-04-27 1980-08-12 Ricoh Company, Ltd. Charging phase control device for ink jet recording device
EP0104951A2 (en) * 1982-09-29 1984-04-04 The Mead Corporation Ink jet printer and method of printer operation
EP0113499A2 (en) * 1982-09-15 1984-07-18 EASTMAN KODAK COMPANY (a New Jersey corporation) Ink jet printer
US4491852A (en) * 1982-07-02 1985-01-01 Ricoh Company, Ltd. Ink jet printing apparatus using guard drops
US4613871A (en) * 1985-11-12 1986-09-23 Eastman Kodak Company Guard drops in an ink jet printer
US4849909A (en) * 1984-11-09 1989-07-18 Hitachi, Ltd. Ink-jet recording device
EP1314766A1 (en) 2001-11-23 2003-05-28 Sicpa Holding S.A. Pigmented ink composition

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5610672B2 (ja) * 1974-02-07 1981-03-10
JPS5611187B2 (ja) * 1975-01-29 1981-03-12
KR102587317B1 (ko) * 2019-08-28 2023-10-10 가부시키가이샤 하모닉 드라이브 시스템즈 푸시풀 솔레노이드

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3562757A (en) * 1968-02-28 1971-02-09 Dick Co Ab Guard drop technique for ink jet systems
US3631511A (en) * 1970-05-08 1971-12-28 Dick Co Ab Drop charge compensated ink drop video printer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5242334B2 (ja) * 1971-12-09 1977-10-24
US3789422A (en) * 1972-09-21 1974-01-29 Ibm Ink drop coupling capacitance compensation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3562757A (en) * 1968-02-28 1971-02-09 Dick Co Ab Guard drop technique for ink jet systems
US3631511A (en) * 1970-05-08 1971-12-28 Dick Co Ab Drop charge compensated ink drop video printer

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4032924A (en) * 1974-10-31 1977-06-28 Nippon Telegraph And Telephone Public Corporation Distortion reduction in ink jet system printer
US4157551A (en) * 1974-10-31 1979-06-05 Nippon Telegraph And Telephone Public Corporation Distortion reduction in ink jet system printer
US4080606A (en) * 1975-05-09 1978-03-21 Hitachi, Ltd. Ink jet printer
US4086601A (en) * 1976-03-30 1978-04-25 International Business Machines Corporation Sequential ink jet printing system with variable number of guard drops
US4217595A (en) * 1978-04-27 1980-08-12 Ricoh Company, Ltd. Charging phase control device for ink jet recording device
US4491852A (en) * 1982-07-02 1985-01-01 Ricoh Company, Ltd. Ink jet printing apparatus using guard drops
EP0113499A2 (en) * 1982-09-15 1984-07-18 EASTMAN KODAK COMPANY (a New Jersey corporation) Ink jet printer
US4490729A (en) * 1982-09-15 1984-12-25 The Mead Corporation Ink jet printer
EP0113499A3 (en) * 1982-09-15 1985-11-06 The Mead Corporation Ink jet printer
EP0104951A2 (en) * 1982-09-29 1984-04-04 The Mead Corporation Ink jet printer and method of printer operation
EP0104951A3 (en) * 1982-09-29 1985-11-06 The Mead Corporation Ink jet printer and method of printer operation
US4849909A (en) * 1984-11-09 1989-07-18 Hitachi, Ltd. Ink-jet recording device
US4613871A (en) * 1985-11-12 1986-09-23 Eastman Kodak Company Guard drops in an ink jet printer
EP1314766A1 (en) 2001-11-23 2003-05-28 Sicpa Holding S.A. Pigmented ink composition

Also Published As

Publication number Publication date
DE2428461B2 (de) 1976-03-18
FR2233183A1 (ja) 1975-01-10
CH569588A5 (ja) 1975-11-28
JPS5029133A (ja) 1975-03-25
SE386522B (sv) 1976-08-09
NL7407344A (ja) 1974-12-20
AU474940B2 (en) 1976-08-05
IT1009959B (it) 1976-12-20
AU6857074A (en) 1975-11-06
SE7405626L (ja) 1974-12-19
DE2428461A1 (de) 1975-01-09
CA1001215A (en) 1976-12-07
JPS5412299B2 (ja) 1979-05-22
FR2233183B1 (ja) 1978-12-01
GB1431136A (en) 1976-04-07

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