EP0135558B1 - Tete d'impression a jet d'encre et imprimante qui en est equipee - Google Patents

Tete d'impression a jet d'encre et imprimante qui en est equipee Download PDF

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Publication number
EP0135558B1
EP0135558B1 EP84900990A EP84900990A EP0135558B1 EP 0135558 B1 EP0135558 B1 EP 0135558B1 EP 84900990 A EP84900990 A EP 84900990A EP 84900990 A EP84900990 A EP 84900990A EP 0135558 B1 EP0135558 B1 EP 0135558B1
Authority
EP
European Patent Office
Prior art keywords
base
print head
modulation
head according
jet
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
Application number
EP84900990A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0135558A1 (fr
Inventor
Jean-Claude Millet
Jean-Louis Reynaud
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.)
Markem Imaje SAS
Original Assignee
Imaje SA
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 Imaje SA filed Critical Imaje SA
Publication of EP0135558A1 publication Critical patent/EP0135558A1/fr
Application granted granted Critical
Publication of EP0135558B1 publication Critical patent/EP0135558B1/fr
Expired 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
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/02—Ink jet characterised by the jet generation process generating a continuous ink jet
    • 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
    • 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
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2002/14362—Assembling elements of heads
    • 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
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/01—Embodiments of or processes related to ink-jet heads
    • B41J2202/14—Mounting head into the printer

Definitions

  • the invention relates to an ink jet print head.
  • the inkjet printing technique consists in carrying out a continuous jet of calibrated drops, supplied by a modulation system, then in electrostatically charging these drops by means of charging electrodes, finally in deflecting each drop by means of an electric field such that if the support on which one wishes to write and the writing device are in relative displacement, one obtains the formation of a printing matrix.
  • a so-called drop generation module comprising the ink tank and the ejection nozzle, is made integral, by means of screws, with other modules containing the charging, deflection and recovery means. The whole rests on an elastic base. A shield slides to compress the whole.
  • the disadvantage of such a system is its lack of flexibility to access the various settings essential for the proper functioning of the head.
  • the role of this head is fundamental for the proper functioning of an inkjet printer.
  • the trajectory of the drops ejected at the level of the ejection nozzle is perfectly defined with respect to the charging electrodes, the deflection plates and the support which receives the impression.
  • the printhead meeting these criteria must, in addition, be compact, require no adjustment during operation and, on the other hand, allow simple and reliable adjustments before start-up. Finally, this head must have great ease of access for maintenance.
  • the present invention specifically aims to achieve a print head whose architecture allows it to meet all these requirements.
  • a real housing with a bottom and a cover, is capable of playing two functions, that of protection (cover) on the one hand and that of support for the various elements of the head. impression on the other hand.
  • the housing cover is separated into two parts so that the operator can easily access the charge and charge control electrodes without having to disassemble the modules from each other, as is the case. case in the aforementioned US patent.
  • This dual function of the housing, of casing on the one hand and of support on the other hand leads to a relatively small bulk, to the elimination of adjustments during operation, and to great ease of access for maintenance.
  • a print head essentially consists of a modulation element 1; an electrode holder element 2 supporting the charging electrodes 3 and 4 as well as the deflection plates 6 and 6a.
  • a system of solenoid valves 5 intended to regulate the supply of liquid as well as a gutter holder 7 supporting a gutter 66 intended to collect the drops not used for printing are also integrated into the print head.
  • a housing 8 whose cover 9 is made in two parts: one upper 10 is said to be fixed and the other lower 11 is said to be mobile.
  • the housing 8 and its cover 9 perform two functions: that of rollover and that of holding in place the essential elements listed above.
  • This box 8 indeed cooperates with the new architecture of these elements to ensure that, on the one hand, the optimal location of the jet break, on the other hand, of the perfect centering of the jet.
  • Such a constructive arrangement of the printhead, in accordance with the invention is particularly advantageous for the implementation of the ink jet printing method as is explained in more detail below by means of FIG.
  • the housing 8 which constitutes a first support for the essential elements listed above is called support housing 8 in the following description. It comprises a bottom 13, a lower base 14, an upper base 15 and two side walls 16 and 17.
  • the solenoid valve system 5 is introduced into the support housing 8 to which it is fixed by any means known per se.
  • the electrical connection devices, the fluid supply pipes, the safety relays and in general all the complementary environment which is not directly related to the invention is not shown. These are conventional technical means; only their passage 18 in the upper base 15 is shown.
  • the lower base 14 has an orifice 190 through which the calibrated, charged and deflected drops pass in the direction of the substrate to be printed (not shown).
  • the modulation element 1 essentially consists of a base 19 comprising a bore 20 of diameter D, into which the modulation body 21 is introduced. well said. It may, for example, be a vibrating device with piezoelectric elements as described in French patent EN 7,923,934 filed on 26. 09. 79, published under No. 2,465,528 and the owner of which is the plaintiff.
  • This plate 22 carries a nozzle 23 consisting for example of a ruby pierced with an orifice 24 for ejecting the jet of drops whose path is symbolized by the axes XY and X'Y '; the base 19 of the modulation element 1 is made integral with the bottom 13 of the support box 8, as shown in FIG. 2 by any known means, for example a screw 26.
  • the faces 28 of the base 19 of the modulation body 21 undergo machining such that they are perfectly tolerated in dimensions and in parallelism.
  • the translation in height of the modulation body 21 and its rotation in the bore 20 are adjustable by sliding and / or rotation of the body 21 in the base 19 and its locking in the desired positioning by a locking screw 30.
  • L base 19, support of the modulation body 21 further comprises a recess 31, provided with a bore 32 capable of receiving an axis 34.
  • the fixed upper part 10 of the cover 9 is put in place, the profile of which also has a recess 35 which frees up the space for the ends of the axis 34 intended to be in turn threaded in a bore 36 made in part 11 of the cover 9 as will be explained below.
  • a second extremely important element of the invention and whose cooperation with the modulation element 1 is essential for the proper functioning of the print head is constituted by the electrode holder element 2.
  • This essentially comprises a support body 40 in which are embedded and fixed the charge electrode 3 and the charge control electrode 4, and which receives by fixing the set of deflection plates 6 and 6a.
  • the two electrodes 3 and 4 are each provided with a calibrated slot 41 and 42 through which passes the jet of drops provided by the modulation element 1 and the nozzle 24, before crossing the space which separates the two plates of deflection 6 and 6a.
  • the slots 41 and 42 produced in these electrodes and the bearing faces of the deflection plates are by construction strictly parallel.
  • the electrode-carrying element 2 is made integral with the lower part 11 of the cover 9 intended to close the support box 8, previously equipped with the modulation element 1.
  • This connection is made by means 50, allowing adjustment of the transverse positioning of the electrode holder element 2, while its vertical positioning is fixed by a set of studs 51 opposing its sliding in the longitudinal direction.
  • the electrode holder element 2 is fixed to the lower part 11 of the cover 9, the latter is placed on the support housing 8 already equipped with the upper part 10 of its cover 9.
  • the axis 34 passes through the part 11 and the base 19 for modulation through the bores 32 and 36.
  • the part 11 is guided in rotation on the faces 28 of the base 19.
  • the lower part 11 of the cover 9 is immobilized by means, for example, of a knurled nut 60 which makes it integral with the lower base 14 of the support box 8.
  • the modulation body 21 in rotation inside the modulation base 19, it is certain to be able, by the combination of the two combined actions at the level of the nozzle holder plate 22 and of the body modulation 21 to satisfy a fundamental condition, namely: putting the jet in a plane parallel to the faces of the charging electrodes 3 and 4 defined by the slots 41 and 42 and to the deflection plates 6 and 6a, the parallelism of these faces and of these plates being obtained by construction.
  • the jet is centered by means of a centering means 50.
  • the charging electrode 3 must be located at a determined distance from the precise place where the jet breaks into droplets, in this case the break must occur in the middle of the slot 41 of the charging electrode 3 ,
  • the latter having a fixed position relative to the modulation base 19, the possibility of positioning the modulation body 21 in height in the bore 20 makes it possible to satisfy this criterion.
  • the gutter 66 is also fixed to the lower base of the housing 8. Its role is to collect the drops not used for printing.
  • a print head according to the invention can be fitted to all types of printers of the so-called continuous ink jet type.
  • maintenance is particularly facilitated because of the possible opening of the cover 9, the lower part 11 of which can be rotated about the axis 34.
  • the substrate to be printed is placed facing the passage 190 provided in the lower base 14 of the housing 8 and perpendicular to the axis xy of the jet defined above.

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
EP84900990A 1983-03-07 1984-02-28 Tete d'impression a jet d'encre et imprimante qui en est equipee Expired EP0135558B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8303975 1983-03-07
FR8303975A FR2542257B1 (fr) 1983-03-07 1983-03-07 Tete d'impression a jet d'encre et imprimante qui en est equipee

Publications (2)

Publication Number Publication Date
EP0135558A1 EP0135558A1 (fr) 1985-04-03
EP0135558B1 true EP0135558B1 (fr) 1988-08-24

Family

ID=9286719

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84900990A Expired EP0135558B1 (fr) 1983-03-07 1984-02-28 Tete d'impression a jet d'encre et imprimante qui en est equipee

Country Status (9)

Country Link
US (1) US4617574A (ja)
EP (1) EP0135558B1 (ja)
JP (1) JPS60500660A (ja)
AU (1) AU576751B2 (ja)
CA (1) CA1225876A (ja)
DE (1) DE3473582D1 (ja)
FR (1) FR2542257B1 (ja)
IT (2) IT8453065V0 (ja)
WO (1) WO1984003474A1 (ja)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2573008B1 (fr) * 1984-11-13 1988-01-08 Imaje Sa Tete d'impression monobuse a jet d'encre
FR2576251B1 (fr) * 1985-01-24 1988-04-22 Imaje Sa Dispositif d'ecriture par projection d'encre multibuse
US4847631A (en) * 1986-07-16 1989-07-11 Ricoh Company, Ltd. Charge and deflection control type ink jet printer
JPS63125346A (ja) * 1986-11-14 1988-05-28 Ricoh Co Ltd インクジエツト印字装置のヘツドモジユ−ル
US4811035A (en) * 1988-03-14 1989-03-07 Eastman Kodak Company Modular two-color fluid system for continuous ink jet printer
US4809015A (en) * 1988-03-14 1989-02-28 Eastman Kodak Company Continuous ink jet printer having modular print head assembly
GB8806218D0 (en) * 1988-03-16 1988-04-13 Elmjet Ltd Continuous ink-jet printing device
US4928115A (en) * 1988-10-31 1990-05-22 Eastman Kodak Company Continuous ink jet printer having remotely operable print head assembly
FR2653063B1 (fr) * 1989-10-16 1995-10-27 Imaje Tete d'impression a jet d'encre et procede de mise en óoeuvre de cette tete destinee notamment a l'impression de caracteres de grandes dimensions.
EP0646470B1 (en) * 1993-09-08 1999-12-15 Hitachi, Ltd. An ink jet printing apparatus
DE69719607T2 (de) * 1996-06-18 2004-02-12 Scitex Digital Printing, Inc., Dayton Kontinuierlich arbeitender Farbstrahldruckkopf
NL1009806C2 (nl) * 1998-08-05 2000-02-08 Stork Digital Imaging Bv Modulaire inktstraaldrukkop.
US6069752A (en) * 1999-02-17 2000-05-30 Eastman Kodak Company Replaceable laser and modulator unit
US6848774B2 (en) 2002-04-01 2005-02-01 Videojet Technologies, Inc. Ink jet printer deflection electrode assembly having a dielectric insulator
US6779879B2 (en) 2002-04-01 2004-08-24 Videojet Technologies, Inc. Electrode arrangement for an ink jet printer
GB0719992D0 (en) * 2007-10-12 2007-11-21 Videojet Technologies Inc Ink jet printer head assembly
EP2741917B1 (en) 2011-08-12 2019-05-22 R. R. Donnelley & Sons Company Apparatus and method for disposing inkjet cartridges in a carrier
CN114051457B (zh) * 2019-04-19 2023-10-17 马克姆-伊玛杰公司 打印装置和打印系统
US11186086B2 (en) 2019-04-19 2021-11-30 Markem-Imaje Corporation Systems and techniques to reduce debris buildup around print head nozzles

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US1941001A (en) * 1929-01-19 1933-12-26 Rca Corp Recorder
US2842421A (en) * 1950-07-07 1958-07-08 Dreyfus Jean Albert Dynamic indicators
GB1272206A (en) * 1969-05-23 1972-04-26 Casio Comp Kabushiki Kaisha A method and apparatus for writing characters
US4277790A (en) * 1979-12-26 1981-07-07 International Business Machines Corporation Field replaceable modules for ink jet head assembly
US4338610A (en) * 1972-11-21 1982-07-06 Burroughs Corporation Modular-head endorser
JPS5243432A (en) * 1975-10-03 1977-04-05 Hitachi Ltd Ink jet recordng device
US4201993A (en) * 1978-12-22 1980-05-06 Hitachi, Ltd. Ink jet printer using inflammable ink
FR2465528A1 (fr) * 1979-09-26 1981-03-27 Hotchkiss Brandt Sogeme Dispositif vibratoire a element piezo-electrique pour canon a liquide destine a une tete d'ejection d'un liquide fragmente
JPS5651365A (en) * 1979-10-04 1981-05-08 Ricoh Co Ltd Ink jet head of ink jet printing device
JPS5677156A (en) * 1979-11-28 1981-06-25 Ricoh Co Ltd Ink jet recorder
EP0036296A3 (en) * 1980-03-14 1981-10-07 Printos B.V. Method of and apparatus for applying substances to a surface

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
IBM Technical Disclosure Bulletin, vol. 15, no. 5, octobre 1972, Armonk (US), J.H.Meier:"Mechanical X-Y Aiming of Ink-Jet Printer Nozzles", page 1683 *
IBM Technical Disclosure Bulletin, vol. 17, no. 9, février 1975, Armonk (US), R.E. Pelkie et al.:"Cassette Ink-Jet Head", pages 2622-2623 *

Also Published As

Publication number Publication date
FR2542257B1 (fr) 1985-08-02
IT8467211A0 (it) 1984-03-07
JPS60500660A (ja) 1985-05-09
AU576751B2 (en) 1988-09-08
IT1182256B (it) 1987-10-05
IT8453065V0 (it) 1984-03-07
AU2575584A (en) 1984-09-28
FR2542257A1 (fr) 1984-09-14
DE3473582D1 (en) 1988-09-29
CA1225876A (fr) 1987-08-25
WO1984003474A1 (fr) 1984-09-13
JPH0452779B2 (ja) 1992-08-24
EP0135558A1 (fr) 1985-04-03
US4617574A (en) 1986-10-14

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