EP1854635A1 - Druckereinheit mit verformbarer Halterung - Google Patents

Druckereinheit mit verformbarer Halterung Download PDF

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Publication number
EP1854635A1
EP1854635A1 EP07290595A EP07290595A EP1854635A1 EP 1854635 A1 EP1854635 A1 EP 1854635A1 EP 07290595 A EP07290595 A EP 07290595A EP 07290595 A EP07290595 A EP 07290595A EP 1854635 A1 EP1854635 A1 EP 1854635A1
Authority
EP
European Patent Office
Prior art keywords
plate
printing unit
head
supporting
rigid
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.)
Granted
Application number
EP07290595A
Other languages
English (en)
French (fr)
Other versions
EP1854635B1 (de
Inventor
François Dumenil
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.)
Machines Dubuit SAS
Original Assignee
Machines Dubuit SAS
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 Machines Dubuit SAS filed Critical Machines Dubuit SAS
Priority to PL07290595T priority Critical patent/PL1854635T3/pl
Publication of EP1854635A1 publication Critical patent/EP1854635A1/de
Application granted granted Critical
Publication of EP1854635B1 publication Critical patent/EP1854635B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B41J2/1752—Mounting within the printer
    • 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
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2132—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding
    • B41J2/2135—Alignment of dots
    • 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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
    • 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 present invention relates to a printing unit of an inkjet printing machine of the type comprising an inkjet head, a head support plate, a bracket for fixing the unit of printing to a printing machine, and means for adjusting the orientation of the head relative to the bracket.
  • Such printing units are used on inkjet printing machines, a machine generally comprising several printing units arranged in parallel towards the same object to be printed.
  • At least four printing units are arranged side by side, each for a primary color and black.
  • drops of several colors are superimposed on the support. It is therefore appropriate that the heads of the printing units are rigorously positioned parallel to one another so that the projected drops, after displacement of the printing units by a suitable number of steps, are rigorously superimposed, otherwise the drops are staggered, reducing the quality of the resulting print.
  • the printing units are generally mounted on the frame of the machine by means of an adjustable fixing bracket, for example by means of parallel rail systems controlled by screw / nut arrangements.
  • the print head is generally adjustable to precisely define the direction of the ink jet.
  • the adjustment means of the printing unit are conventionally rail systems on which the head slides. Such systems lack precision and are cumbersome.
  • the print heads are placed in cells formed in a support plate.
  • the heads are surrounded by cleats fixed to the sheet and thrust screws mounted in the cleats control the position of the nozzles in the cells.
  • the position as well as the parallelism of the nozzles are adjusted by means of opposing screws, which requires loosening the screw opposite to the one which must make the displacement.
  • Such settings are extremely long and tedious and despite the fact that they must be made only during a change of nozzles, the lightness of the settings makes these settings unreliable over time.
  • the object of the invention is to propose a printing unit comprising precise adjustment means, in particular in several directions and reliable over time.
  • the subject of the invention is a printing unit of the aforementioned type, characterized in that the means for adjusting the orientation of the head comprise at least one adjustment push-button applied to the turntable, and the turntable is elastically deformable in at least one direction under the action of the or each adjustment pushbutton.
  • the invention also relates to an ink jet printing machine, characterized in that it comprises at least one printing unit as described above.
  • the printing unit according to the invention is intended to equip an ink jet printing machine for printing bottles in series, for example.
  • the printing machine 1 shown in FIG. 1 comprises four printing units 3, 4, 5 and 6 according to the invention, mounted parallel to each other on a carriage 7 slidably mounted on two rails 8 secured to the frame of the printing machine.
  • the printing units are directed towards a conveyor 9 where the object to be printed will be placed.
  • the carriage 7 and the conveyor 9 are movable perpendicular to each other in a plane perpendicular to the printing direction of the units 3 to 6.
  • the carriage 7 and the conveyor 9 are driven by stepper motors as known. in itself.
  • Each printing unit such as the unit 3 shown in FIGS. 2 and 3 essentially comprises a support plate 11 and an inkjet printing head mounted on the plate.
  • the plate 11 is a machined monobloc plate of rectangular shape, comprising two main faces forming a front face 16 and a rear face 17, parallel to the plane defined by X and Y directions.
  • the thickness of the plate defines the Z direction.
  • the support plate 11 comprises a bracket 25 for securing the plate 11 to the carriage 7 by screws 28 visible in FIG. 4.
  • the head 15 of rectangular shape is positioned in a notch 39 on the front face 16 of the plate 11, the opening of the head being directed towards the slide.
  • the head 15 is fixed to the plate 11, rear side 17, by fixing screws screwed through a fixing plate 36, visible in Figures 1 and 4.
  • the head 15 comprises two lugs 37 for positioning the head in the notch 39.
  • the head 15 is fed by an ink pipe and electrical cables 19 fixed to the head by a connector 20.
  • the plate 11 comprises two lateral slots 41 and 43 and an inner slot 45.
  • the two lateral slots 41 and 43 are rectilinear and parallel, in the direction Y.
  • the slots 41 and 43 are each open at one end on a side 46 of the platinum, and define two parallel arms forming, at one end, an adjusting arm 47 and, at the other end, the fixing bracket 25.
  • Each arm comprises a first end integrally connected to the rest of the plate and a second free end .
  • the fixing bracket 25 defines the side of the plate 11 by which the plate is connected to the carriage 7.
  • the adjustment arm 47 supports a micrometer adjustment screw 48 with knurled control knob, mounted through the adjustment arm 47 at its free end.
  • the micrometer screw 48 presses the plate 11 through the slot 41.
  • the side 46 of the plate 11 has two notches 49 and 50, projecting on either side of the notch 39, spaced from the width of the head 15, the head being slightly set back relative to the two notches.
  • the inner slot 45 has a U-shape, each of the legs running parallel to each of the two lateral slots 41 and 43.
  • the two lateral slots 41 and 43 and the U-shaped slot 45 delimit in the plate 11, beyond the console.
  • the two beams 51 and 52 are connected by two branches 53.
  • the assembly constituted by the two beams and the two branches forms a parallelogram 54.
  • the supporting beam 51 is extended at one end by the adjustment arm 47 and is connected at its other end to the console 25.
  • junction zone between the end of the bracket 25 and the supporting beam 51 is weakened by two grooves 55A and 55B on each side of the plate, in the extension of the lateral slot 43 to form an axle hinge extending in the plane of the plate 11 perpendicular to the supporting beam 51.
  • the width e of the branches 53 is smaller than the width E of the arm 47 and the console 25.
  • the console 25 comprises a transverse hole 56, visible in FIG. 4, in the vicinity of its free end in the direction X.
  • This hole 56 contains a spring 57 bearing, at one end, on a plug 58 integral with the console 25, its other end being supported on the parallelogram 54 in the extension of the support beam 52 along the axis thereof.
  • the turns of the spring 57 are compressed in the X direction between the bracket 25 and the parallelogram 54.
  • the spring is able to push the beam 52 of the head support towards the adjustment arm 47 against the action of the screw micrometric 48.
  • the console 25 integrates, besides a part of the plate 11, a rigid rigid adjustment beam 61 according to its thickness, arranged along the plate 11, this beam 61 being rigidly connected to the console through the carriage 7.
  • the adjusting beam 61 shown in FIGS. 5 and 6, is integral with the carriage 7. It is fixed to the carriage by fixing screws 63.
  • the adjusting beam 61 supports a screw 64 for centering threaded end engaged in a stepped hole 67 of the beam.
  • the centering screw 64 is screwed into the plate 11, its head being slidable in the stepped hole 67.
  • a compressed spring 73 is interposed between the shoulder 71 and the head of the screw 64.
  • the spring tends to bring the plate 11 of the beam 61 by action on the screw 64 connected to the plate.
  • the screw 64 is preferably connected to the plate away from the console 25.
  • a second micrometer screw 75 with knurled knob is interposed between the plate 11 and the adjusting beam 61.
  • the micrometer screw 75 is in a direction Z perpendicular to that of the micrometer screw 48.
  • the screw 75 is applied away from the bracket 25 in the vicinity of the spring 73.
  • the positioning of the printing unit 3 relative to the carriage, and therefore to the other printing units, is done by means of two micrometric screws 48 and 75.
  • micrometric screw 48 driven manually in rotation presses in the X direction against the support beam 52, which is urged in the opposite direction by the compressed spring 57.
  • the beam 52 is biased along its axis from one end by the spring 57 and from its other end by the micrometer screw 48.
  • the spring and the screw both act to push the beam 52.
  • the width E of the adjustment arm 47 and the bracket 25 being greater than the width e of the branches 53, the beam 52 is displaced relative to the adjustment arm 47 by deformation of the parallelogram 54, the branches 53 deforming and articulating in particular at the ends of the indeformable beams 51 and 52.
  • the parallelogram 54 is assumed to be a rectangle, the beams 51 and 52 being parallel, as the branches 53 .
  • the user acts on the screw 48 to compress the spring 57.
  • the user looses the micrometer screw 48, so that the beam 52 is moved under the action of the spring 57.
  • the combined action of the spring 57 and the micrometer screw 48 allows a displacement of the beam 52 and thus the head 15 on either side of the equilibrium position of the parallelogram 54.
  • the supporting beam 51 is angularly displaced with respect to the console 25 under the counteracting actions of the micrometer screw 75 and springs 73.
  • the supporting beam 51 is assumed parallel to the beam 61.
  • the micrometer screw 75 is tightened, leading to an accentuated compression of the spring 73.
  • the screw 75 is loosened and the spring 73 still compressed recalls the end of the beam 51.
  • the displacement of the beam 51 is done by articulation around the hinge delimited by the two grooves 55A, 55B.
  • the action on the micrometric screw 48 combined with the spring 57 ensures an exactly identical positioning of the heads 15 in the direction X perpendicular to the carriage.
  • the platen 11 being integrally formed, and the latter being elastically deformable, the support of the head 15 is relatively simple to manufacture and inexpensive while allowing a reliable and accurate positioning of each print head.
  • the springs 57, 73 and the micrometer screws 48, 75 forming actuators are capable of ensuring movements of the head of +/- 0.4 mm, ie the spacing between two nozzles of printing heads in which the nozzles are spaced apart. 0.32 mm (80 dpi).
  • the two unhooks 49 and 50 of the support part between which the head 15 is positioned slightly set back, allow the head 15 never come into contact with the object to be printed, even in case of mishandling during adjustment.
  • the head 15, fragile and expensive part, is thus protected.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Ink Jet (AREA)
EP07290595A 2006-05-11 2007-05-10 Druckereinheit mit verformbarer Halterung Not-in-force EP1854635B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07290595T PL1854635T3 (pl) 2006-05-11 2007-05-10 Zespół drukujący z odkształcalną podporą

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0604204A FR2900867B1 (fr) 2006-05-11 2006-05-11 Unite d'impression a support deformable

Publications (2)

Publication Number Publication Date
EP1854635A1 true EP1854635A1 (de) 2007-11-14
EP1854635B1 EP1854635B1 (de) 2008-12-17

Family

ID=37672188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07290595A Not-in-force EP1854635B1 (de) 2006-05-11 2007-05-10 Druckereinheit mit verformbarer Halterung

Country Status (5)

Country Link
EP (1) EP1854635B1 (de)
DE (1) DE602007000370D1 (de)
ES (1) ES2318836T3 (de)
FR (1) FR2900867B1 (de)
PL (1) PL1854635T3 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2094489A4 (de) * 2006-12-22 2010-03-31 Fujifilm Dimatix Inc Druckkopfanordnung mit verstellbarer halterung
CN102490471A (zh) * 2011-11-25 2012-06-13 深圳市润天智数字设备股份有限公司 一种喷头定位装置及应用该装置的喷绘打印机
US10632773B2 (en) 2017-04-25 2020-04-28 Heidelberger Druckmaschinen Ag Mounting device for a print head, a mounting assembly and a printing system
US10682873B2 (en) 2016-04-18 2020-06-16 Xaar Technology Limited Droplet deposition head alignment system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0693382A1 (de) 1994-07-18 1996-01-24 Océ-Nederland B.V. Drucker mit einem beweglichen Druckkopf

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0693382A1 (de) 1994-07-18 1996-01-24 Océ-Nederland B.V. Drucker mit einem beweglichen Druckkopf

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2094489A4 (de) * 2006-12-22 2010-03-31 Fujifilm Dimatix Inc Druckkopfanordnung mit verstellbarer halterung
US7794079B2 (en) 2006-12-22 2010-09-14 Fujifilm Dimatix, Inc. Adjustable mount printhead assembly
CN102490471A (zh) * 2011-11-25 2012-06-13 深圳市润天智数字设备股份有限公司 一种喷头定位装置及应用该装置的喷绘打印机
CN102490471B (zh) * 2011-11-25 2014-11-05 深圳市润天智数字设备股份有限公司 一种喷头定位装置及应用该装置的喷绘打印机
US10682873B2 (en) 2016-04-18 2020-06-16 Xaar Technology Limited Droplet deposition head alignment system
US11358405B2 (en) 2016-04-18 2022-06-14 Xaar Technology Limited Droplet deposition head alignment system
US10632773B2 (en) 2017-04-25 2020-04-28 Heidelberger Druckmaschinen Ag Mounting device for a print head, a mounting assembly and a printing system

Also Published As

Publication number Publication date
DE602007000370D1 (de) 2009-01-29
FR2900867B1 (fr) 2010-06-04
FR2900867A1 (fr) 2007-11-16
EP1854635B1 (de) 2008-12-17
ES2318836T3 (es) 2009-05-01
PL1854635T3 (pl) 2009-06-30

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