EP0084891A2 - Imprimante à jet d'encre avec une seule tête à jets multiples - Google Patents

Imprimante à jet d'encre avec une seule tête à jets multiples Download PDF

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Publication number
EP0084891A2
EP0084891A2 EP83100729A EP83100729A EP0084891A2 EP 0084891 A2 EP0084891 A2 EP 0084891A2 EP 83100729 A EP83100729 A EP 83100729A EP 83100729 A EP83100729 A EP 83100729A EP 0084891 A2 EP0084891 A2 EP 0084891A2
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EP
European Patent Office
Prior art keywords
droplets
ink
orifice
nozzles
print
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Granted
Application number
EP83100729A
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German (de)
English (en)
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EP0084891B1 (fr
EP0084891A3 (en
Inventor
Shou L. Hou
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TMC Co
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TMC Co
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Publication of EP0084891A3 publication Critical patent/EP0084891A3/en
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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
    • B41J2/485—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes
    • 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
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/02—Ink jet characterised by the jet generation process generating a continuous ink jet
    • B41J2/025—Ink jet characterised by the jet generation process generating a continuous ink jet by vibration

Definitions

  • the present invention relates to the use of more than one jet in a single head ink jet printer to accomplish faster and more effective printing, while maintaining an excellent print quality for serial printers.
  • the multi-jet nozzles are aligned in a straight line parallel to the printing direction, while droplets from each jet (or nozzle) are deflected under the deflection electric field in a direction perpendicular to the printing direction.
  • An interlacing technique is used to assure quality as good as that of a single continuous jet printer, but it yields a print speed n-times faster, where n is the number of nozzles in the ink jet array printer.
  • the present invention also relates to the method of producing that printing.
  • Such a printer has an ink reservoir which is under a constant pressure of typically 16 to 80 pounds per square inch.
  • the pressure causes the ink filament ejected from a small orifice of 20 to 50 microns in diameter toward a small well-defined area of the paper to be printed which paper is supported a fixed distance from the nozzle on a suitable platen.
  • the filament Under the stimulation of an ultrasonic wave, the filament is broken into a stream of well-defined ink droplets at a rate equal to the frequency of the superimposed ultrasonic wave.
  • charge induction droplets are charged one by one before break-up and the amount of charge causes each droplet to deflect generally perpendicular to the printing direction in proportion to the charge imposed.
  • the droplet is deflected under the influence of an electrostatic field produced by deflection means to a predetermined position.
  • a straight line generally perpendicular to the print direction (usually a vertical line), or parts of a line, is drawn so that by drawing a series of closely spaced vertically oriented segments of lines the desired character is completed.
  • the charge imposed on the droplets is varied in a predetermined stepwise fashion, but for each droplet there is the option of putting the charge at a level which causes the droplet to be directed to a gutter or ink catcher rather than impinging upon the paper.
  • these non-printing droplets are not charged and only the droplets used to draw the successive vertical line segments are charged.
  • Successive vertical lines are drawn as a carriage supporting at least the ink jet orifice and charging electrode moves transverse to the jet deflection, usually horizontally across a line on the paper on the platen for a serial printer.
  • the charge potential for successive droplets is increased or decreased in generally fixed predetermined steps so that if all of the droplets are allowed to impinge the paper, they will together draw a vertical line. Characters are produced by moving the carriage horizontally effectively drawing a successive sequence of vertical line segments at predetermined positions which are needed to form the sequence of selected characters.
  • Particle charge information for each possible character capable of being printed is stored in a memory which typically at each voltage will either allow that deflection voltage to be imposed on the charging electrode or typically in most printers completely removes voltage to allow the ink to be caught in the ink gutter positioned to catch uncharged particles and recirculate them to the reservoir for reuse.
  • An ink jet printer of the present invention may be of the type shown in U.S. Patent No. 3,596,275, issued July 27, 1971, to R. G. Sweet or U.S. Patent No. 3,298,030, issued January, 1967, to A. Lewis and D. Brown.
  • the process has produced 240 dots/inch (or 10 dots/nm.) printing at 92 characters per second at 12 pitch.
  • the approach has all nozzles share a common ink system, a common ink reservoir, a common deflection electrode, and a common ink collector.
  • the cost is substantially less than those of 1200 single continuous jets.
  • the present invention is directed to a print head containing from 2 to n jets. All jets are aligned in a straight line parallel to the printing direction. Each jet deflection is in a direction perpendicular to the print direction. Proper delay is provided to each jet during printing to maintain a good printing quality. By the use of the multiple jets the printing speed will be increased 2 to n times faster depending upon the number of jets used.
  • a high resolution character needs 640 print droplets at 10 dots/mm (or 240 dots/inch) resolution; and needs 1000 print droplets at 12 dots/mm. (or 300 dots/mm.) resolution. While at 5 dots/mm. (or 120 dots/inch) resolution, only 160 print droplets are sufficient to form a character.
  • a typical continuous ink jet operates at about 100,000 droplets a second.
  • a typical single continuous jet printer prints about 50 characters per second at 12 dots/mm. resolution; about 80 characters per second at 10 dots/mm. resolution; and about 310 characters per second at 5 dots/mm. resolution.
  • the following table lists the printing speeds as a function of process and a number of jets:
  • a single continuous jet printer has a quality and speed comparable with that of a daisywheel printer. There is very little price performance advantage over a daisywheel printer.
  • the present invention offers a printing speed increase by n-times (where n is the number of nozzles in a single print head), while maintaining the same high resolution quality.
  • the additional structure required in accordance with the present invention is relatively nominal. The parts are known and easily fabricated and many parts can be used in common such as the ink system, the deflection plates, the gutter and recirculation system. Hence, the process is cost effective.
  • the present invention has the ink jet nozzles aligned in a straight line and is in parallel with the relative print direction.
  • Each nozzle is capable of producing a stream of ink droplets.
  • Each droplet is properly charged to a pre-determined level and is able to be deflected by the deflection electric field to a maximum deflection of at least 1.35 times the character height perpendicular to the print direction.
  • each nozzle in the ink jet printer prints exactly like the ink jet printer described in the Sweet patent and Lewis and Brown patent.
  • each nozzle will print a portion of the vertical matrices.
  • the vertical matrices printed by different nozzles in the array will interlace to form a high resolution character.
  • jet "1" will print every even number of vertical matrices
  • jet "2” will print every odd number of vertical matrices.
  • There is a time delay for jet “2" with respect to jet “1” by (d ⁇ 1/R)/10V seconds where:
  • the distance between centers of two nozzles must be a multiple integer of the inter-dot distance between centers for the given resolution.
  • each nozzle prints only every third vertical matrices, i.e.,
  • each nozzle will print every nth dotted line apart.
  • the Kth jet in the array will print every (mn ⁇ K)th dotted line, while the first jet will print every (mn ⁇ 1)th dotted line, where n is an integer.
  • There exists a time delay for the Kth jet with respect to the first jet by (K-1) [d ⁇ 1/R]/10V second, or a spacial delay of (K-1) [dR ⁇ 1] dotted lines.
  • Electrostatic Coulomb force between two charged particles of adjacent jets is where q is the charge contained in the droplet "i", r is the distance between the droplets of adjacent jets, and K is a constant. Note that the closest distance between charged droplets from 2 adjacents jets is the distance between the jet nozzles which as a practical proposition is taken to be 1 - 3 mm. At 132,000 droplets/sec. and a droplet velocity of 2000 cm./sec., the inter-droplet spacing for a single jet is .152 millimeters, the inter-droplet spacing is 7 to 20 times closer than the inter-jet spacing. Since Coulomb force is inversely proportional to the square of the distance, correction due to adjacent jet is very small. Hence, one can ignore both the electrostatic correction as well as the aerodynamic wake effect for droplets between jets.
  • the ink jet printer apparatus of the present invention employs an ink chamber or reservoir having at least two matched orifice nozzles aligned parallel to one another.
  • Means of constant pressure or of constant flow is employed to apply pressure to the reservoir to force ink out through each of said orifices in a thin filament, including means acoustic energy means generating waves of the same phase being preferred, acting on the ink to break the filament into droplets of predetermined size, each droplet being of a size to produce a dot of predetermined size in a raster of dots forming a printed character.
  • Deflection plates are positioned so that all of the droplets pass in droplet paths from the respective nozzles each in planes transverse to the deflection plates.
  • Deflection voltage supply means is connected to the deflection plates to impose an electrostatic field between the deflection plates.
  • Charging electrode means is fixed relative to each orifice nozzle in position adjacent to the respective orifice nozzles along the droplet paths from that nozzle.
  • Electrostatic shielding means may be interposed between adjacent charging electrodes to isolate charge effects imposed on droplets of one stream from droplets of another.
  • a source of voltage is connected to the respective charging electrode means.
  • Each charging electrode is capable of inducing electrostatic charge on the individual droplets as they break off from the ink filament emerging from the orifice associated with the charging electrode. The droplets are then deflected into paths determined by their respective charges as they pass through the field imposed by the deflection plates.
  • Voltage switching means is provided for applying in a prearranged order selected voltages (which may include zero voltage) to each charging electrode, as the individual droplets pass through.
  • the selected level of voltage induces charge on each droplet determined by and different for each voltage and causes that droplet to follow a predetermined droplet path.
  • Each droplet having the same charge will follow the same path, different from paths followed by droplets having other charges but all of which droplet paths lie in a common plane transverse to the deflection plates.
  • Ink collector means is positioned for collection of non-print ink droplets for all nozzles moving along the predictable paths generated by a particular selected level of voltage typically at zero potential.
  • Means is supplied for supporting paper in position such that droplets moving along paths in a plane from an orifice nozzle will impinge the supported paper at points along a line opposite that orifice nozzle and parallel to a line opposite another orifice nozzle upon which droplets from said other nozzle impinge.
  • Carriage is also provided for moving the orifice nozzles and charging electrode means relative to the means supporting the paper transverse to the plane of droplet paths from a particular nozzle.
  • the method of the present invention involves either manually or automatically, as by computer, delaying the printing of intermediate lines until the second nozzle orifice catches up with the position adjacent to that the first nozzle orifice was in when it printed the line adjacent to which the new line is to be printed by the second nozzle.
  • the pattern of dots in the (2n ⁇ 1)th dotted line printed by the second jet is delayed from the time of the printing of the 2nth dotted line by the first jet by (d ⁇ 1/R)/10V seconds where "d" is in the inter-jet spacing in millimeters, "V” is the print speed in cm./sec., and "R” is resolution in dots per millimeter.
  • the spacial delay is expressed (dR ⁇ 1) dotted lines.
  • Figs. 1 and 2, 5, 6, 7 and 8 illustrate a preferred embodiment.
  • Much of the system is known to be conventional. Much of it has been shown in schematic form since the actual physical form is well known. Thus, for example, in Figs. 1 and 2, the ink chamber 10 is shown schematically.
  • the orifice nozzles through which ink filaments are ejected from the reservoir are best seen as nozzles 12a and 12b in an orifice plate 12. The use of two nozzles in this configuration is new.
  • a support structure 18 of insulating material supports ring charging electrodes 16a and 16b, between which is provided a conductive electrostatic shield 14 of conductive material.
  • the reservoir structure is more representative of an actual form which would be employed.
  • the reservoir provides a cone-shaped cavity in a block 20 provided with a cylindrical extension 20a the outside surface of which is threaded to engage the threads of a cap 22.
  • the cap closes the narrow end of the conical cavity and is provided with the orifices 12a and 12b on an orifice plate 12.
  • Ink is fed into the cavity 10 through a conduit 24, preferably from a sump fed from the return means from the gutter (to be described) through a suitable pump which supplies pressure at a constant rate, typically about 16 to 80 pounds per square inch.
  • the ink is fed into the ink chamber by way of a cavity 26 adjacent to back plate 28 mounted on the reservoir plate 20 using a sealing gasket 30 and suitable fasteners and supporting an ultrasonic transducer 32.
  • a filament of ink on the order of 20 to 30 microns in diameter is ejected under the pressure through the orifice nozzle and is broken into well-defined ink droplets in the charge rings 16 at a rate equal to the rate of the frequency of the ultrasonic source, thus, enabling each individual droplet to be separately and differently charged by the charging means 14.
  • the two jets involved here are charged by the charging ring electrodes 16a and 16b which surround the paths of the droplets close to the orifice and before they are deflected by the electrostatic plates 34a and 34b.
  • the amount of deflection of an individual droplet depends upon the charge imposed upon that droplet by its charging ring electrode 16a or 16b.
  • uncharged droplets are allowed to proceed undeflected through the electrostatic field between the plates 34a and 34b into the gutter or catcher 36. They are returned by drain 38 to a sump and by the pump back to the reservoir through the line 24 as described all in conventional manner. If instead of not being charged the droplets are charged, the electrostatic field will act upon them to deflect them.
  • a line of dots can be drawn by successive droplets on a piece of paper 40 carried on a platen 42 on a printer.
  • the ink must pass through an elongated slot 44a in a shield 44 and the slot is gauged to permit the full length of the character to be drawn or printed on the paper 40.
  • the deflection electrodes 34a and 34b may be short and carried on the print head carriage or may be made optionally long and extend the length of the printer platen. The same is true of the catcher or gutter 36.
  • the rest of the structure, the charging electrodes 16a and 16b and their support 14 are effectively mechanically integral with the reservoir and orifices and are part of the laterally moving print head which moves parallel to the length of the platen.
  • the print head therefore is designed to sequentially print as it moves along the structure, parallel to the platen.
  • the two orifice nozzles located along the horizontal diameter (or axis) are spaced on the order of 3 to 4 mm apart.
  • the tip of the cone in the ink chamber 10 is elongated in the horizontal direction, the direction of head traverse to a dimension of 6 nm as opposed to 3 mm in the vertical dimension.
  • the elongated cone tip is recommended to focus the acoustic energy and to assure an efficient non-perturbed acoustic wave reaching at the orifice nozzles with identical energy density and at identical phase.
  • the back of the cone has a diameter of 8 mm and is closed by a stainless steel plate 28 with a circular disc transducer 32, 8-10 mm in diameter, mounted in the other side of the metal cover for stimulation.
  • the distance between the orifice plate and the back plate for stimulation should be (2m + 1) A/4 where A is the acoustic wave length of the ink, and m is an integer.
  • the head structure remains identical with that of a single jet head structure.
  • Charging electrodes 16a and 16b consist of two metal rings with 1.0 mm inner diameter.
  • the thickness of the charging electrode or the length of each ring is about 0.9 to 1.0 mm.
  • the distance between centers of the charging rings is identical to the distance between centers of the orifice nozzles.
  • Both the orifice nozzles 12a and 12b and two charging rings 16a and 16b are located an equal distance above the bottom of the deflection plates 34a.
  • nozzles 12a and 12b produce jets that are as close to identical twins as possible.
  • jet a will reach there first, while jet b is 3 mm. away.
  • the printed dot from a droplet in jet a will be 3nm. away from the one in jet b, plus additional error caused by the jet straightness.
  • jet straightness is a major concern for a high resolution printing ink jet array.
  • the droplet placement error should be within 25 microns.
  • the corresponding jet straightness is less than 1 milliradian.
  • jet a In a regular text printing mode with a resolution of 300 dots per inch (or 12 dots/mm.), jet a will print the 2nth dotted line, while jet b will print the (2n ⁇ 1)th dotted line. There is a delay of 3 x 12 ⁇ 1 dotted lines between jets, or a time delay of (3 ⁇ 1/12)/10V seconds before jet b starts printing next to the dotted line printed by jet a, where "V" is the velocity of the carrier in cm./second.
  • jet a lags behind jet b by 3 x 12 ⁇ 1 dotted lines or lags by a time of (3 ⁇ 1/12)/10V seconds.
  • each jet prints 32 positions. Jet a prints the even number 2n th dotted lines and jet b prints the odd (2n-1)th dotted lines. Time delay between these two jets is (3 ⁇ 1/10)/10V seconds or 3 x 10 ⁇ 1 dotted lines. In general, if "d" is the inter-jet spacing in mm and resolution is R dots/mm., then the time delay between two jets is (d ⁇ 1/R)/10V seconds; or a spacial delay of (dR 1) dotted lines.
  • Jet a will print at the 2(2m)th dotted lines; while jet b prints at the 2 (m - 1) th dotted lines. All odd number of dotted lines are omitted.
  • the time delay between two jets is always (d ⁇ 2/R)/10V seconds; or a spacial delay of (dR ⁇ 2) dotted lines away.
  • "d”, "R” and "V” have been defined in Section (1).
  • each jet is basically the same as a regular single continuous jet used in regular printing, droplet charging, charge compensation, and guard drop scheme are the same. To minimize the cross talk between jets, electrostatic shielding between charging electrodes is recommended.
  • a configuration is shown in which a 5-nozzle jet configuration is employed.
  • the structure is very similar as that for the 2-jet array shown in Figs. 1, 2, 5 through 8 and therefore similar numbers with the addition of primes thereto are employed in the structure.
  • the ink reservoir 10' is modified somewhat in shape and elongated within plate 20' in order to accommodate three transducers 32', 32b', 32c'.
  • the back plate 28' supports the transducers distributed longitudinally and the transducers are interconnected in such a way that they will be cumulative or additive in their effect rather than counteracting the effect of other transducers.
  • the orifice plate 12' in this case has five separate orifices 12a', 12b', 12c', 12d', and 12e'.
  • the orifices are carefully aligned so that they produce jets which are directed in parallel paths.
  • the jets pass through charging rings 16a', 16b', 16c', 16d', and 16e' and they are each supported on an insulating charge plate 18'.
  • FIG. 9 is a sectional view through the structure so that only the lower deflection plate 34b' is seen but it will be understood that an upper deflection plate 34a' is also employed as in the prior structure. Furthermore, an ink collector means 36' is positioned so that if no charge is placed upon the droplets, they will be collected by the collection means. However, as in the prior arrangements, if charges are placed upon the droplets, they will be suitably deflected onto paper 40' on a platen 42'.
  • Fig. 11 shows a typical pattern printed by the 5-nozzle printer of Fig. 9 to print a character "T".
  • Jet "1” prints the lst, 6th, llth, 16th and 21st dotted lines; jet “2” prints the 2nd, 7th, 12th, 17th, and 22nd dotted lines; ...; and jet “5" prints the 5th, 10th, 15th, 20th, and 25th dotted lines.
  • the interlacing of all printed dotted lines forms the character "T”. Note that all 5 nozzles must be identical in every practical means. Jet straightness must be within acceptable level.
  • the interlacing scheme blends all 5 jet printing in every portion of the character. Hence, it produces a more homogeneous appearance, and every slight misalignment will be averaged out.
  • the vertical positional accuracy are precisely taken care of by electronic compensation on the amount of charge given to each individual droplet.
  • kth jet prints every (5m + K)th dotted lines, if we choose a time delay for the Kth jet with respect to the 1st jet by (K-1) (d + 1/R)/10V seconds, where d, R, m, and V are as defined above.
  • the corresponding spacial delay is (K-1) (dR + 1) dotted lines for th Kth jet.
  • Another printing sequence is shown in the bottom of Fig. 11 where the Kth jet prints every (5m - K)th dotted lines, if we choose the time delay for the Kth jet with respect to the first jet by (K-1) (d - 1/R)/10V seconds.
  • the corresponding spacial delay is (K-1) (dR - 1) dotted lines.
  • Character printing is done through a character generator on a ROM chip.
  • the signal from each dotted column will first go through a specific shift register to provide a proper spacial delay (or time delay) before being sent to the driving electronics for the Kth jet charge electrode.
  • the printer head assembly starts with a transducer array 32a', 32b', 32c' of rectangular shape mounted on a back plate 28' opposite to the rectangular pads 31a', 31b' and 31c'.
  • a transducer array is necessary when the total length of the ink jet array exceeds a/2, the half acoustic wavelength of the ink.
  • the acoustic wave generated by the transducer array must have the same amplitude and phase to avoid generating a longitudinal acoustic standing wave along the direction of the orifices.
  • Transducers are mounted by epoxy on the back plate 28', which may be a flat thin plate, or with a number of corresponding pads. The structure separates the transducer array from direct contact with ink, while transmitting acoustic energy effectively to the ink chamber.
  • the ink chamber contains ink inlet 24' and an ink outlet 25', preferably with a controlled valve (not shown).
  • the tapered slot shape ink chamber block has transducer array mounted on the larger crossection end, and the orifice plate at the tapered end. Mechanical clamping, soldering, or gluing by epoxy are methods of mounting.
  • a tapered shaped ink chamber is to focus the acoustic energy toward the orifice plate.
  • the length of the ink chamber should be at least ⁇ /2 longer than the total length of the orifice array.
  • the width of the slot in the ink chamber should not exceed half wavelength ⁇ /2 to avoid higher order standing wave generation.
  • the depth of ink chamber between the back plate and the orifice plate should be kept at (2m + 1) ⁇ /4, where m is an integer and ⁇ is the acoustic wavelength of the ink at the stimulation frequency.
  • the fabrication of the orifice plate 12 is one of the most critical parts of the ink jet printer. Although it is possible to drill a series of identical holes on a thin metal plate, (preferably a 5+ to 10 mils stainless or nickel plate) it is better recommended to use photo-fabrication process to control precisely the dimension and the shape. Silicon single crystal wafer can be made as an orifice plate through oxidation then preferentially etch nozzles at predetermined positions using photo-resist. One can also use electroform process to fabricate a precision orifice plate, where a photoresist image is first made on a conductive substrate before electrodeposition. Care must be exercised to assure perfectly round holes with identical dimensions to minimize the droplet placement error.
  • the charge plate 18' has equal number of holes lined-up concentrically with the orifices as shown in Fig. 12a.
  • Conductive rings 16a', 16b', 16c', 16d' and 16e' are made on the holes in the charge plate and is individually connected to the driving circuit for charging electrode. Electrostatic shields between nearest charge rings are recommended through not necessary.
  • Another configuration of the charge plate consists of an array of conductive U-shaped channels 18a (see Fig. 12b) or semi-circles 18b (see Fig. 12c) on the charge plate. Each channel is connected to the driving electronic circuit. Although the former configuration has superior shielding against cross-talk between jets, the latter has advantages in operation especially during the start-up and shut down.
  • the width of the deflection plates and catcher 36' have to be widened to cover beyond the entire jet array in the present invention. Otherwise, they are identical with that of a single jet printer.
  • the ink chamber, deflection plates, catcher and ink system including pump, filtration, ink supply and tubings are common to all jets.
  • FIGs. 3 and 4 shows a modified construction wherein two jets are employed but the jets are provided one above the other instead of in lateral alignment.
  • Fig. 3 is the side view of another type of 2-jet configuration, where two jets are aligned 3 to 6 mn apart one on each side of printing area.
  • the charge electrodes for jet a and jet b have opposite polarities. Under the deflection electric field given in Fig. 3, charged droplets from jet a will be positively “+” charged, hence deflected downward; while droplets from jet b will be negatively charged "-" and are deflected upward.
  • a dual catcher is shown in Fig. 4 which is a sectional view from line 4-4 in Fig. 3. The upper catcher catches the non-print droplets from jet a and the lower catcher catches the non-print droplets from jet b. The aperture between the catcher fingers is the window for printing.
  • jet a and jet b in Fig. 3 may be replaced by two rows of ink jet array, each array is parallel to the print direction. Row a is located above the print area and row b is located below the print area.
  • the polarities of the matched charge electrodes for raw a is opposite to that of row b so that the print droplets from each row of ink jet array are deflected in opposite direction into the print area to form the predetermined characters or images.
  • high resolution images can be obtained at a printing speed n times faster than a single jet printer, where n is the total number of jets in the print head.

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  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
EP83100729A 1982-01-27 1983-01-27 Imprimante à jet d'encre avec une seule tête à jets multiples Expired - Lifetime EP0084891B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US34328882A 1982-01-27 1982-01-27
US343288 1982-01-27

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EP0084891A2 true EP0084891A2 (fr) 1983-08-03
EP0084891A3 EP0084891A3 (en) 1984-07-18
EP0084891B1 EP0084891B1 (fr) 1991-08-21

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JP (1) JPS58132566A (fr)
CA (1) CA1202522A (fr)
DE (1) DE3382377D1 (fr)

Cited By (6)

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Publication number Priority date Publication date Assignee Title
EP0225168A2 (fr) * 1985-11-26 1987-06-10 Dataproducts Corporation Appareil à jet d'encre par impulsion
WO1991011327A1 (fr) * 1990-01-24 1991-08-08 Domino Printing Sciences Plc Tete d'impression pour imprimante a jet d'encre en continu
EP0709194A1 (fr) 1994-10-24 1996-05-01 Domino Printing Sciences Plc Tête d'imprimante à jet d'encre
US7687102B2 (en) * 2003-10-23 2010-03-30 Medtronic, Inc. Methods and apparatus for producing carbon cathodes
GB2467100A (en) * 2008-11-14 2010-07-21 Domino Printing Sciences Plc Self balancing re-circulation system for multi-jet continuous inkjet printer
CN114506077A (zh) * 2021-12-28 2022-05-17 杭州捷诺飞生物科技股份有限公司 一种热泡式阵列微滴打印喷头、打印设备及其打印方法

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Publication number Priority date Publication date Assignee Title
JP5919159B2 (ja) * 2012-10-05 2016-05-18 株式会社日立産機システム インクジェット記録装置

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EP0225168A2 (fr) * 1985-11-26 1987-06-10 Dataproducts Corporation Appareil à jet d'encre par impulsion
EP0225168A3 (en) * 1985-11-26 1988-11-23 Dataproducts Corporation Impulse ink jet apparatus
WO1991011327A1 (fr) * 1990-01-24 1991-08-08 Domino Printing Sciences Plc Tete d'impression pour imprimante a jet d'encre en continu
US5410342A (en) * 1990-01-24 1995-04-25 Domino Printing Sciences Plc Of Bar Hill Printhead for continuous ink jet printer
EP0709194A1 (fr) 1994-10-24 1996-05-01 Domino Printing Sciences Plc Tête d'imprimante à jet d'encre
EP0709194B1 (fr) * 1994-10-24 1999-02-10 Domino Printing Sciences Plc Tête d'imprimante à jet d'encre
US7687102B2 (en) * 2003-10-23 2010-03-30 Medtronic, Inc. Methods and apparatus for producing carbon cathodes
GB2467100A (en) * 2008-11-14 2010-07-21 Domino Printing Sciences Plc Self balancing re-circulation system for multi-jet continuous inkjet printer
GB2467100B (en) * 2008-11-14 2012-10-10 Domino Printing Sciences Plc Improvements in or relating to continuous inkjet printers
CN114506077A (zh) * 2021-12-28 2022-05-17 杭州捷诺飞生物科技股份有限公司 一种热泡式阵列微滴打印喷头、打印设备及其打印方法
CN114506077B (zh) * 2021-12-28 2024-07-05 杭州捷诺飞生物科技股份有限公司 一种热泡式阵列微滴打印喷头、打印设备及其打印方法

Also Published As

Publication number Publication date
JPS58132566A (ja) 1983-08-06
JPH0424229B2 (fr) 1992-04-24
DE3382377D1 (de) 1991-09-26
EP0084891B1 (fr) 1991-08-21
CA1202522A (fr) 1986-04-01
EP0084891A3 (en) 1984-07-18

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