US3866237A - Digital phase control for ink jet printer - Google Patents

Digital phase control for ink jet printer Download PDF

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Publication number
US3866237A
US3866237A US372897A US37289773A US3866237A US 3866237 A US3866237 A US 3866237A US 372897 A US372897 A US 372897A US 37289773 A US37289773 A US 37289773A US 3866237 A US3866237 A US 3866237A
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Prior art keywords
frequency
signals
signal
counter
droplets
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Expired - Lifetime
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US372897A
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English (en)
Inventor
Johann Hans Meier
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IBM Information Products Corp
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International Business Machines Corp
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Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to US372897A priority Critical patent/US3866237A/en
Priority to FR7414329A priority patent/FR2234140B1/fr
Priority to GB1899474A priority patent/GB1438069A/en
Priority to JP6299874A priority patent/JPS5342580B2/ja
Priority to CH657474A priority patent/CH577713A5/xx
Priority to IT22715/74A priority patent/IT1012360B/it
Priority to SE7407076A priority patent/SE389410B/sv
Priority to NL7407343A priority patent/NL7407343A/xx
Priority to CA201,965A priority patent/CA1001214A/en
Priority to DE2428425A priority patent/DE2428425C2/de
Application granted granted Critical
Publication of US3866237A publication Critical patent/US3866237A/en
Assigned to MORGAN BANK reassignment MORGAN BANK SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: IBM INFORMATION PRODUCTS CORPORATION
Assigned to IBM INFORMATION PRODUCTS CORPORATION, 55 RAILROAD AVENUE, GREENWICH, CT 06830 A CORP OF DE reassignment IBM INFORMATION PRODUCTS CORPORATION, 55 RAILROAD AVENUE, GREENWICH, CT 06830 A CORP OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: INTERNATIONAL BUSINESS MACHINES CORPORATION
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    • 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

Definitions

  • ABSTRACT PRINTER Phase control device for an ink jet printer in which the [75] Inventor, Johann Hans Meier Vestal, phase between ink droplet forming means and the droplet charging means is adjusted and maintained by Asslgneei lmematlfnal Business Machines using the reset signal of a ring counter of predeter- Corporatlon, Armonk mined capacity and changing the number of pulses in [22] Filed: June 22 1973 a train producing cycling of the counter.
  • the counter is normally supplied with clock pulses at a frequency PP 372,897 which is an integral multiple of the frequency of drop let formation and counter capacity is such that reset 52 us. Cl.
  • the magni- UNTED STATES PATENTS tude of the sawtooth wave is such that all unwanted 3,596,276 7/l97l Lovelady 346/75 X droplets strike a gutter
  • the location f droplet impact gm on the gutter is sensed and the pulse train to the 3769632 /1973 E "; ⁇ ;i 346/75 counter is changed by either adding or deleting a pulse to thereby change the time of the reset and initiation Primary Ewminer joseph w Hartary signals by a fraction of the droplet formation fre- Altorney, Agent, or Firm-Kenneth P.
  • FIG. 4 u) CLOCKQPULSES W b) SAMPLE SIGNAL L c) COMPARATOR 51 e) SINGLE SHOT 10 d) AND 68 r) SINGLE SHOT n 9) AND 36 FIG. 4
  • This invention relates generally to ink jet printers and more particularly to apparatus for maintaining the proper phase relationship between the droplet forming means and charging voltage for each droplet.
  • phase relationship between the applied charging voltage and the droplet formation is critical to the accurate placement of the droplets upon a printing surface.
  • deflection cannot be predicted and drops are misplaced on the printing surface, generally resulting in deformed characters.
  • attempts to insure the proper phase relationship have employed usually an analog circuit to change the relationship or have employed coarse adjustments such as 180 or 90 of phase shift which then becomes an approximation if the phase should have been corrected by different amounts.
  • phase control circuits there is a tendency for voltage levels to gradually shift so that accurate phase maintenance deteriorates. Also in the prior art, the correction signal which is determined to be necessary is used to control a delay circuit which is satisfactory for the coarse adjustments but makes fine adjustments in the phase relationship nearly impossible unless elaborate delay networks are employed.
  • Another important object of this invention is to provide apparatus for phase shift control for an ink jet printer in which the increments of adjustment can be of nearly any desired size.
  • a further object of this invention is to provide a phase control system for an ink jet printer in which a ring counter of predetermined capacity is continuously supplied with clock pulses and the charge application to ink droplets depends upon the time of reset of the ring counter.
  • a still further object of this invention is to provide a phase control system for an ink jet printer in which phase correction can occur over a wide range of time intervals.
  • phase control system for an ink jet printer in which phase change is bi-directional and in which the system will automatically find a region of optimum performance and then hunt by discrete steps about the optimum point.
  • a clock pulse generator that has a frequency that is an integral multiple of the frequency of the ink droplet forming means.
  • the droplet forming means is operated through a frequency divider and the clock output is directly connected to a ring counter through gating logic circuits.
  • the capacity of the ring counter is equal to the integral multiple of clock pulses per droplet generated.
  • the output of the ring counter during reset provides an initiation signal for both the character generator circuit and the sawtooth calibration charging circuit for discarded droplets, which in turn controls the voltage application to the charging plates at the time of droplet formation.
  • Discard droplets charged by the ramp voltages will fall into one of a pair of impact locations in a gutter according to the ramp voltage level at the time of droplet formation.
  • Droplet impact is detected and a signal is generated as to which impact area the discard droplets are impinging upon.
  • These impact signals are used to control the above mentioned logic circuits to either suppress one count or add one count to the pulse train which is supplied by the clock to the ring counter.
  • the time at which the reset signal occurs in the ring counter varies at each correction, either approximately one clock pulse period earlier or one clock pulse period later.
  • the timing of the pulse train alterations is controlled through a sampling pulse which can be supplied at regular or randomly selected intervals.
  • the sampling pulse activates gating circuits which will permit the addition or deletion of a clock pulse to the ring counter.
  • the gating circuits also assure that pulse deletion or addition will occur at the proper time to avoid interference with the regularly generated clock pulses.
  • the clock pulse frequency is 1 MHz while the droplet formation is at KHz.
  • incremental adjustments are 45 for each change. Only one alteration of the normal clock train is permitted in any one counting cycle.
  • the sampling pulse if desired, can be produced about as frequently as each millisecond or at greater time intervals such as 15 to 20 milliseconds, depending upon the amount of control necessary for proper drop deflection.
  • the discard drops do not impact a correct position in the gutter. Instead when impact occurs in one of two gutter positions, the correction circuits change the direction of phase shift to move the discard drop impact into the other gutter location.
  • This phase control circuit uses only digital signal levels, and hence avoids the need for close discrimination as required by analog circuits.
  • the control circuit is simplified in arrangement and does not require complex special circuits.
  • FIG. I is a schematic circuit diagram of a phase control system for an ink jet printer constructed in accordance with the invention.
  • FIGS. 2-5 are timing diagrams of signals illustrating various embodiments during operation of the phase control system of FIG. 1.
  • reference numeral denotes ink droplet generating and deflecting apparatus usually employed in an ink jet printer system.
  • Ink from supply 11 is brought through duct 12 and pressurized by pump 13 to issue from nozzle 14 which is vibrated by transducer 15 to form individual droplets in the vicinity of a pair of charging electrodes 16.
  • the voltage applied across the nozzle and electrodes 16 is varied to induce differing charges on the droplets as formed, which then pass between deflecting electrodes 18 connected to a high voltage source providing a constant electric field.
  • the droplets are thereby caused to move in a trajectory determined by the individual charge each carriers as it passes through the field so as to impact a printing surface 19 or a gutter 20.
  • Gutter 20 collects the discarded droplets and is connected to a source of vacuum, not shown, which removes the ink and usually returns it to supply 11 for recirculation.
  • the formation of droplets does not always occur at the same break-off point between charging electrodes 16 and hence, may receive an inappropriate charge causing erratic deflection when passing between electrodes 18.
  • the variation in droplet break-off time may be due to change in ink viscosity or temperature or for other reasons. It is therefore important that the phase relationship between the applied charge and nozzle vibration causing the formation of droplets be closely controlled to attain accurately defined printing trajectories.
  • a pulse generator designated as clock produces pulses at a relatively high frequency, such as 1 MHz. These pulses are supplied to frequency divider 26, preferably at a ratio of 8 to I so that the output of the frequency divider is 125 KHz. These signals are supplied to the vibrator drive circuit 27 which activates transducer 15 to thereby produce droplets at the samefrequency.
  • Counter 31 is an eight position ring counter which provides an output as an initiation signal upon each reset of the counter at a nominal rate of KHZ.
  • the nominal counter reset frequency is the same as the output frequency of divider circuit 26 which is supplied to the nozzle vibrator.
  • Counter 31 is advanced by pulses from clock 25 along line 32 which supplies both of two branches 33 and 34.
  • Clock pulses on line 33 pass through logical OR circuit 35 and serve as one of two inputs to logical AND circuit 36.
  • AND 36 is fully conditioned the clock pulses are supplied through OR 37 to ring counter 31.
  • the clock pulses on line 34 are supplied to AND 38 which, when fully conditioned, produces pulses at AND 39. When the latter is fully conditioned, then clock pulses will appear at OR 37 for application to ring counter 31.
  • Gutter 20 is formed with two compartments 20a and 20b and is constructed in accordance with the principles disclosed in the aforementioned patent application by .l. W. Haskell. Compartment 20a, forming one impact location for discard droplets, contains therein a pair of spaced electrodes 45, indicated schematically in the drawing, which are adapted to be wet with the ink droplets falling into that compartment. Compartment 20b, forming a second impact location for discard droplets and separated by a knife edge 46, has no contacts.
  • Both compartments are, of course, connected to the vacuum removal system for the accumulated ink.
  • Contacts 45 form the sensors to detect into which compartment the ink droplets are currently falling. These contacts are connected to a voltage divider and filter network 47 to provide an electrical output signal indicative of the presence or absence of the ink droplets.
  • This detection network comprises a pair of resistors 48 and 49 connected between a positive voltage source and ground.
  • a capacitor 50 parallels resistor 49 and contacts 45 from ink discard compartment 20a.
  • comparator circuit 51 When ink droplets, which are electrically conductive, fall into compartment 2011, they complete a circuit between the two contacts 45 to thus produce a low impedance path to ground, bypassing resistor 49, and thus establish approximately a ground potential as one input to comparator circuit 51. However, should the discard droplets be impacting compartment 20b, contacts 45 will be essentially open so that the input signal to comparator 51 will be that voltage appearing across capacitor 50 and resistor 49. Comparator circuit 51 has as its second input a suitable reference voltage source and upon comparison with the detection circuit input will provide either a low level output, indicating droplet impingement in compartment 20a. or a high level output, indicating impingement by the discard droplets in compartment 20b. The output signal of comparator 51 is applied to both AND 39 and inverter circuit 52.
  • AND 38 has one input clock pulses which are supplied along lines 32 and 34.
  • the second input to AND 38 is from a logical NAND circuit 53, to which one input is clock pulses on line 54, and the second which is along line 55 from a sampling pulse circuit to be described subsequently.
  • NAND 53 will not be operable since it lacks a signal on line 55 and its output will therefore be at a high level. This will fully condition AND 38 to thereby gate clock pulses from lines 32 and 34 to AND 39.
  • AND 39 will be effective to transmit clock pulses to OR 37 and then to ring counter 31.
  • each reset provides an initiation signal at its output which starts character generator circuit 28 and discard charging circuit 30 as described above.
  • comparator 51 If it is now assumed that the output level from comparator 51 is low, it will provide a blocking signal at AND 39. However, inverter 52 will reverse the level and the high level signal will fully condition AND 36 so that clock pulses appearing on lines 32 and 33 and passing OR 35 will be gated through AND 36. The output of AND 36 is supplied to OR 37 and thence to ring counter 31.
  • ring counter 31 will receive regular clock pulses through either AND 36 or AND 39, depending on whether discard droplets are impacting respective locations 20a or 20b of the gutter. No change, however, occurs in the cycle time of the ring counter, since it will be regularly receiving clock pulses at the 1 MHz frequency through one of the alternate circuits.
  • a change in the phase relationship between the drop formation by transducer and drop charging by circuits 28, 29 and 30 is controlled through the application of a sampling signal.
  • This signal may be produced at regular intervals or intermittently as desired or as necessary to properly maintain the phase relation.
  • a sampling signal is regularly obtained at approximate 17 ms. intervals through a transformer 60 connected across an alternating current source 61 for example, 60 Hz.
  • the output of the secondary winding is coupled to a pulse sharpening circuit 62 whose output is connected to latch circuit 63.
  • the latch output serves as one input to AND 64 which has a second input applied from inverter 65 to which clock pulses are supplied on line 66.
  • AND 64 will provide a high level output during the negative portion of the clock pulse when latch 63 is set.
  • This output of AND 64 sets another latch 67 and is also used to reset latch 63.
  • the setting of latch 67 serves as a conditioning input for AND 68 which has a second input clock pulses on line 66. Therefore, latch 67 will be set during the negative portion of the clock pulse and AND 68 will produce a high level output on line 69 during the next positive portion of the clock pulse.
  • the high level output on line 69 is used to reset latch 67 and is supplied as a sampling signal for activating single shot 70 and conditioning NAND 53 as mentioned above.
  • FIG. 2 illustrates the condition when the sampling signal initially occurs during the time the clock pulse is low (waveforms a and b).
  • Latches 63 and 67 are both immediately set because of the high level output of inverter 65 (waveforms c, d, e, and f).
  • Latch 67 being high conditions AND 68 so that a sampling signal occurs at the time the clock pulse level next becomeos high (waveformsfand g).
  • Latch 67 is reset at the fall of the clock pulse.
  • latch 63 if the sampling signal initially arrives during the time the clock output is high, latch 63 will be set but latch 67 cannot be since inverter 65 blocks AND 64 (waveforms a e). Latch 67 is set when the clock output next becomes low, but AND 68 blocks any output until the next clock high level occurs (waveforms e g).
  • comparator 51 If at that time, comparator 51 is at low level, then inverter 52 and AND 36 produce a signal which is supplied through OR 37 to ring counter 31 as an extra pulse to advance the ring counter one position in addition to the advances normally resulting from' the clock pulses. Thus, ring counter 31 will reach its reset point one clock period sooner and produce an initiation signal to the character generator 28 and discard charging circuit 30 that much earlier.
  • AND 36 was conditioned by the comparator circuit that indicated that discard drops were impacting at location 20a of gutter 20. With the earlier initiation signal supplied to circuits 28 and 30, a charge will also be applied earlier to droplets at charging electrodes 16. This will cause discard droplets to move to impact location 20b because the ramp voltage is started earlier and thus is higher at the instant of drop formation.
  • sampling pulse 69 Upon the removal of the sampling pulse on line 69, however, clock pulses will resume and continue to increment the ring counter.
  • Sampling pulse 69 is limited to being effective for only a single clock pulse. Since counter 31 has missed one of the regular clock pulses, it will produce an initiation signal to the circuits 28, 29, and 30, one clock period later. This results in driver circuit 29 applying a delayed charging signal to the droplets. As a result, discard droplets that are charged will now impinge on impact location a.
  • the ink jet nozzle is originally aimed so that with no signal applied to the change electrodes 16 in FIG. 1, the droplets will impact the gutter at compartment 20a with detection electrodes. Thereafter, the control system is energized and every droplet that is not needed for printing goes to the gutter and gets a charge depending upon the relationship of the break-off time with the ramp voltage produced from discard charging circuit 30. During the first moments of operation, the relationship is not defined, but there is a ramp for each discard droplet. The first droplets may thus hit the part of the gutter without the terminals, or the part with the terminals, but all droplets will impact the same part, omitting for the time being the case where the drops are split by the divider 46.
  • the system will add or subtract pulses at the rate of one per sampling period until the normal hunting mode is re-established.
  • an ink jet printer having a transducer for vibrating a nozzle at a predetermined frequency to produce droplets having a selected phase relation with applied.
  • variable, input information charges induced thereon by an input information source energizing a charging electrode for correspondingly varying deflection of said droplets in an electric field between deflecting electrodes apparatus for varying the phase relation between said transducer vibrations and said applied charges comprising:
  • circuit means connected to said charging electrode for applying, in response to an initiation signal, input information signals to said droplets and, in the absence thereof, applying calibration signals to droplets to be discarded;
  • detecting means for said discarded droplets having a plurality of sensor locations, each said location producing an output signal peculiar to droplet presence thereon;
  • control means responsive to said output signals to alter the number in said train of clock pulses at said counter means during a counting cycle and change the time of said count cycle and thereby the frequency of said initiation signal.
  • control means includes means for generating sampling signals for enabling change of said phase relation and gating means connected to said clock pulse means and sampling signal means, being operable for selecting certain said output signals to be effective to change said count cycle time.
  • control means is responsive to said output signals to alter said train of clock pulses and initiation signals so that subsequent ones of said calibration signals charge said discard droplets for deflection to the other of said locations.
  • control means is responsive to said first output signal to add a pulse to said train of clock pulses supplied to said counter means, and is responsive to said second output signals to delete a pulse from said train of clock pulses supplied to said counter means.
  • ink under pressure is delivered to a nozzle which is vibrated at a predetermined frequency by a transducer means to produce a stream of drops and a charging electrode is positioned adjacent said nozzle to charge said drops in a selected phase relation with information signals from input information signal means applied to said electrode for producing deflection of said drops in accordance with said information input signals as said drops move in an electric field between a pair of deflecting electrodes
  • apparatus for varying the phase relation between the formation of said drops and said information input signals comprising;
  • circuit means including calibration signal means and said input information signal means connected to said charging electrode for applying to said charging electrode, in response to an initiation signal, calibration signals and information input signals so that all drops not charged by said information input signals are charged by said calibration signals;
  • pulse counter means connected to said source and said circuit means for supplying an initiating signal at said predetermined frequency to said input information signal means and said calibration signal means concurrently;
  • ink jet printer system in which pressurized ink issues from a nozzle vibrated by a transducer means to produce a stream of droplets that receive in a selected phase relation from a charging electrode at the time of formation a charge representative of information from an information input means to establish a subsequent marking or discard position upon passing through an electric field between a pair of deflection electrodes, apparatus for varying the phase relation between said transducer vibration and said applied charge comprising:
  • circuit means including calibration signal means and said information input signal means connected to said charging electrode for applying, in response to an initiation signal, said calibration signal and said information input signals to said charging electrode so that all drops not charged by information input signals are charged by said calibration signal for discard;
  • gutter means catching said discard drops operable to produce first and second output signals indicative of drop impact in a first or a second location thereon, respectively;
  • clock pulse means for producing a train of pulses at a fixed frequency greater than that of said calibration signal
  • counter means of predetermined capacity connected to said circuit means and advanced by said clock means operable to provide an initiating signal at said predetermined frequency to said charging circuit means upon each reset of counter means; and means responsive to said first signals from said gutter means for deleting one of said train of pulses from said clock means and operable in response to said second signals for inserting a pulse in said train of pulses to said counter means.

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  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
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US372897A 1973-06-22 1973-06-22 Digital phase control for ink jet printer Expired - Lifetime US3866237A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US372897A US3866237A (en) 1973-06-22 1973-06-22 Digital phase control for ink jet printer
FR7414329A FR2234140B1 (sv) 1973-06-22 1974-04-19
GB1899474A GB1438069A (en) 1973-06-22 1974-05-01 Ink jet printer
JP6299874A JPS5342580B2 (sv) 1973-06-22 1974-05-05
CH657474A CH577713A5 (sv) 1973-06-22 1974-05-14
IT22715/74A IT1012360B (it) 1973-06-22 1974-05-15 Sistema di controllo della fase perfezionato per una stampatrice a getto d inchiostro
SE7407076A SE389410B (sv) 1973-06-22 1974-05-29 Anordning for fasstyrning vid fergstraletryckutrustning.
NL7407343A NL7407343A (sv) 1973-06-22 1974-05-31
CA201,965A CA1001214A (en) 1973-06-22 1974-06-07 Digital phase control for ink jet printer
DE2428425A DE2428425C2 (de) 1973-06-22 1974-06-12 Für einen Tintenstrahldrucker vorgesehene Einrichtung zur digitalen Regelung der Phasenrelation der mit der konstanten Frequenz n zur Tropfenbildung schwingenden Düse und der Aufladung der gebildeten Tropfen

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US372897A US3866237A (en) 1973-06-22 1973-06-22 Digital phase control for ink jet printer

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US3866237A true US3866237A (en) 1975-02-11

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US372897A Expired - Lifetime US3866237A (en) 1973-06-22 1973-06-22 Digital phase control for ink jet printer

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US (1) US3866237A (sv)
JP (1) JPS5342580B2 (sv)
CA (1) CA1001214A (sv)
CH (1) CH577713A5 (sv)
DE (1) DE2428425C2 (sv)
FR (1) FR2234140B1 (sv)
GB (1) GB1438069A (sv)
IT (1) IT1012360B (sv)
NL (1) NL7407343A (sv)
SE (1) SE389410B (sv)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3911445A (en) * 1974-09-25 1975-10-07 Dick Co Ab Ink drop stream integrity checker in an ink jet printer
US3981019A (en) * 1973-09-26 1976-09-14 Nippon Telegraph And Telephone Public Corporation Charging signal supply circuit for ink jet system printer
US3999188A (en) * 1973-12-05 1976-12-21 Hitachi, Ltd. Ink-jet recording apparatus
US4005435A (en) * 1975-05-15 1977-01-25 Burroughs Corporation Liquid jet droplet generator
US4016571A (en) * 1974-09-17 1977-04-05 Hitachi, Ltd. Ink jet recording apparatus
US4025926A (en) * 1973-01-17 1977-05-24 Sharp Kabushiki Kaisha Phase synchronization for ink jet system printer
US4046961A (en) * 1976-03-04 1977-09-06 Burroughs Corporation Conditioning system for transducer signals
US4086602A (en) * 1975-02-26 1978-04-25 Hitachi, Ltd. Printing video signal information using ink drops
US4310846A (en) * 1978-12-28 1982-01-12 Ricoh Company, Ltd. Deflection compensated ink ejection printing apparatus
US4426652A (en) 1980-10-16 1984-01-17 Ricoh Company, Ltd. Ink jet printing apparatus
US4631550A (en) * 1985-08-15 1986-12-23 Eastman Kodak Company Device and method for sensing the impact position of an ink jet on a surface of an ink catcher, in a continuous ink jet printer
US4638325A (en) * 1985-09-09 1987-01-20 Eastman Kodak Company Ink jet filament length and stimulation amplitude assessment system
US5196860A (en) * 1989-03-31 1993-03-23 Videojet Systems International, Inc. Ink jet droplet frequency drive control system
US5523778A (en) * 1993-12-07 1996-06-04 Videojet Systems International, Inc. Segmented charge tunnel for drop charging in a printhead
WO2003099568A1 (fr) * 2002-05-27 2003-12-04 Viktor Ivanovich Bezrukov Systeme hydraulique d'une imprimante a jet d'encre electrique et elements dudit systeme
US20070296758A1 (en) * 2006-06-22 2007-12-27 Orbotech Ltd Inkjet printing of color filters
US20110042003A1 (en) * 2009-08-21 2011-02-24 Balmer Richard H Method of making a floor panel

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DE2905062A1 (de) * 1979-02-10 1980-08-14 Olympia Werke Ag Verfahren, einrichtung und detektoren zum ueberwachen der geschwindigkeit von tintentropfen
WO1990012690A1 (en) * 1989-04-20 1990-11-01 Leningradsky Institut Tochnoi Mekhaniki I Optiki Electric drop-jet printing device
JP2608806B2 (ja) * 1990-11-29 1997-05-14 シルバー精工株式会社 インクジェットプリンタにおけるレジストレーション調整装置
GB2277394B (en) * 1990-11-29 1995-05-24 S R Tecnos Kk Ink jet recording apparatus

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US3596276A (en) * 1969-02-10 1971-07-27 Recognition Equipment Inc Ink jet printer with droplet phase control means
US3681778A (en) * 1971-05-03 1972-08-01 Dick Co Ab Phasing of ink drop charging
US3769630A (en) * 1972-06-27 1973-10-30 Ibm Ink jet synchronization and failure detection system
US3769632A (en) * 1972-12-11 1973-10-30 Ibm Digital phase control for an ink jet recording system

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
US3596276A (en) * 1969-02-10 1971-07-27 Recognition Equipment Inc Ink jet printer with droplet phase control means
US3681778A (en) * 1971-05-03 1972-08-01 Dick Co Ab Phasing of ink drop charging
US3769630A (en) * 1972-06-27 1973-10-30 Ibm Ink jet synchronization and failure detection system
US3769632A (en) * 1972-12-11 1973-10-30 Ibm Digital phase control for an ink jet recording system

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4025926A (en) * 1973-01-17 1977-05-24 Sharp Kabushiki Kaisha Phase synchronization for ink jet system printer
US3981019A (en) * 1973-09-26 1976-09-14 Nippon Telegraph And Telephone Public Corporation Charging signal supply circuit for ink jet system printer
US3999188A (en) * 1973-12-05 1976-12-21 Hitachi, Ltd. Ink-jet recording apparatus
US4016571A (en) * 1974-09-17 1977-04-05 Hitachi, Ltd. Ink jet recording apparatus
US3911445A (en) * 1974-09-25 1975-10-07 Dick Co Ab Ink drop stream integrity checker in an ink jet printer
US4086602A (en) * 1975-02-26 1978-04-25 Hitachi, Ltd. Printing video signal information using ink drops
US4005435A (en) * 1975-05-15 1977-01-25 Burroughs Corporation Liquid jet droplet generator
US4046961A (en) * 1976-03-04 1977-09-06 Burroughs Corporation Conditioning system for transducer signals
US4310846A (en) * 1978-12-28 1982-01-12 Ricoh Company, Ltd. Deflection compensated ink ejection printing apparatus
US4426652A (en) 1980-10-16 1984-01-17 Ricoh Company, Ltd. Ink jet printing apparatus
US4631550A (en) * 1985-08-15 1986-12-23 Eastman Kodak Company Device and method for sensing the impact position of an ink jet on a surface of an ink catcher, in a continuous ink jet printer
US4638325A (en) * 1985-09-09 1987-01-20 Eastman Kodak Company Ink jet filament length and stimulation amplitude assessment system
US5196860A (en) * 1989-03-31 1993-03-23 Videojet Systems International, Inc. Ink jet droplet frequency drive control system
US5432541A (en) * 1989-03-31 1995-07-11 Videojet Systems International, Inc. Nozzle drive control system and method for ink jet printing
US5523778A (en) * 1993-12-07 1996-06-04 Videojet Systems International, Inc. Segmented charge tunnel for drop charging in a printhead
WO2003099568A1 (fr) * 2002-05-27 2003-12-04 Viktor Ivanovich Bezrukov Systeme hydraulique d'une imprimante a jet d'encre electrique et elements dudit systeme
US20070296758A1 (en) * 2006-06-22 2007-12-27 Orbotech Ltd Inkjet printing of color filters
US7347530B2 (en) 2006-06-22 2008-03-25 Orbotech Ltd Inkjet printing of color filters
US20080117247A1 (en) * 2006-06-22 2008-05-22 Orbotech Ltd. Inkjet printing of color filters
US20110042003A1 (en) * 2009-08-21 2011-02-24 Balmer Richard H Method of making a floor panel

Also Published As

Publication number Publication date
SE389410B (sv) 1976-11-01
IT1012360B (it) 1977-03-10
FR2234140A1 (sv) 1975-01-17
GB1438069A (en) 1976-06-03
DE2428425A1 (de) 1975-01-09
JPS5023727A (sv) 1975-03-14
SE7407076L (sv) 1974-12-23
JPS5342580B2 (sv) 1978-11-13
NL7407343A (sv) 1974-12-24
CA1001214A (en) 1976-12-07
FR2234140B1 (sv) 1976-06-25
CH577713A5 (sv) 1976-07-15
DE2428425C2 (de) 1982-05-27

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