EP0190846B1 - Impression polychrome - Google Patents

Impression polychrome Download PDF

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Publication number
EP0190846B1
EP0190846B1 EP86300443A EP86300443A EP0190846B1 EP 0190846 B1 EP0190846 B1 EP 0190846B1 EP 86300443 A EP86300443 A EP 86300443A EP 86300443 A EP86300443 A EP 86300443A EP 0190846 B1 EP0190846 B1 EP 0190846B1
Authority
EP
European Patent Office
Prior art keywords
printing
ware
transfer
plate
colour
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP86300443A
Other languages
German (de)
English (en)
Other versions
EP0190846A3 (en
EP0190846A2 (fr
Inventor
C.D.J. Cartlidge
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.)
GEBRUEDER NETZSCH MASCHINENFABRIK GMBH & CO
Original Assignee
Erich Netzsch GmbH and Co Holding KG
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 Erich Netzsch GmbH and Co Holding KG filed Critical Erich Netzsch GmbH and Co Holding KG
Publication of EP0190846A2 publication Critical patent/EP0190846A2/fr
Publication of EP0190846A3 publication Critical patent/EP0190846A3/en
Application granted granted Critical
Publication of EP0190846B1 publication Critical patent/EP0190846B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
    • B41F17/001—Pad printing apparatus or machines

Definitions

  • This invention relates to multi-colour printing.
  • the invention is especially, but not exclusively, applicable to the printing of articles of ceramic ware but may be used for printing other articles.
  • multi-colour is used herein to refer to the application of two or more colours.
  • Multi-colour printing of articles is effected by applying individual colours to the article successively.
  • the article conveyor extends beyond the conveyor belt for intermediate carriers so that a colour-receiving position is provided for the articles wherein they are not covered by the intermediate carrier conveyor belt and can be detained in this position.
  • the conveyor belt can be stopped for each intermediate carrier in a colour transfer position.
  • the intermediate carriers can be swung downwardly through 90° over the article which is in the colour-receiving position.
  • a pressure pad driven by a driving mechanism presses the intermediate carrier on to the article in order to transfer the colour from the carrier to this article.
  • the article conveyor moves through a drying kiln in which the colour extract is caused to adhere firmly to the articles.
  • the intermediate carriers are pressed into engagement with successive ceramic articles at said printing station to apply a different colour extract to each of said ceramic articles. This is followed by the step of drying said ceramic articles after each of the different colour extracts is applied to said ceramic articles. Subsequently, the ceramic articles are sequentially returned to said printing station again and a different one of said intermediate carriers is being pressed onto each individual ceramic article. This procedure is being repeated until all colours have been applied to each individual article. This causes substantial registration problems.
  • the invention provides multi-colour printing apparatus comprising a vertically movable non-rotatable printing member, a support for ware to be decorated locatable in a position beneath the printing member and a plurality of transfer members disposed angularly around the central vertical axis of said printing member at a level between same and said ware support, the transfer members being sequentially movable into positions between said printing member and said ware support whereby to permit transfer of printed images therefrom to said printing member for subsequent application to ware mounted on said support.
  • said transfer members comprise generally flat plates on which is etched or engraved a portion of the pattern or decoration to be applied to the articles of ware, each transfer member being provided with doctor means and control means being provided to effect doctoring of each plate during transfer to the ware of the image from the preceding plate.
  • said doctor means is operable following transfer of an image from the associated plate to re-ink the plate in readiness for the next operating cycle.
  • the doctor means preferably incorporates a doctor blade mounted for pivotal movement between inking and doctoring positions and adapted for bodily movement relative to the associated plate in both operative positions of the latter.
  • each of said transfer members incorporates controllable heating means operable to maintain the transfer member at a temperature which will ensure complete transfer of heat sensitive inks from the transfer member to said printing member during operation.
  • said ware support is mounted on a carriage arranged to be horizontally movable between a decorating position disposed vertically beneath said printing member and a loading and unloading position convenient to a machine operator.
  • the ware support may be slidably movable in a direction radially of said printing member in an angular direction intermediate the angular positions of adjacent ones of said transfer members.
  • the ware support preferably incorporates means for centring ware mounted thereon and for securing the centred ware against movement during operation.
  • said printing member comprises a pad of deformable material such as silicone.
  • the apparatus incorporates a central vertically movable printing member 10 in the form of a deformable silicone pad beneath which a ware support 11 is mounted.
  • Four transfer members 12A to 12D are disposed angularly around the axis of movement of the printing member 10 at a level between the printing member 10 and the ware support 11 and are arranged to be slidably movable in turn into positions between the printing member 10 and the ware support 11 whereby patterns printed on each of the transfer members in different colours may be picked up by the printing member 10 in turn and following withdrawal of the transfer member applied to ware mounted on the support 11 by downward movement of the printing member.
  • Fig. 2 the apparatus is shown in greater detail and comprises a support frame 15 on which the printing member 10, ware support 11 and transfer members 12A to 12D are mounted. Only the transfer member 12A is shown in Fig. 2.
  • the printing pad 10 is carried by a rigid backing plate 16 having upwardly extending guides 17 slidably mounted in collars 18 fixed to the frame 15 of the machine.
  • a hydraulic cylinder 19 is mounted above the pad 10 and between the guides 17 and has a piston rod 20 extending through the frame 15 and connected to the mounting plate 16.
  • the cylinder 19 may be extended to move the pad 10 vertically downwards and retracted to withdraw it to the position shown in Fig. 2.
  • the pad 10 is stabilised by the guide members 17 which also serve to prevent rotation of the pad.
  • the pad is therefore constrained so that it may move in a vertical direction only and cannot rotate or move horizontally.
  • An actuating member 21 mounted on one of the guides 17 is adapted to act on control valves 22 mounted vertically adjacent the guide 17 to effect operation of related parts of the equipment in the desired sequence during printing operations.
  • Each of the transfer members 12A to 12D comprises a carrier 25 supporting a generally flat metal plate 26 on which the design or pattern to be applied to the articles to be decorated is etched or engraved.
  • the carrier 25 is slidably mounted on horizontal rails 27 and is adapted to be moved by operation of a hydraulic cylinder 28 between a retracted position shown in Fig. 2 and an extended position in which the transfer member is located between the printing pad 10 and the ware support 11.
  • a doctor mechanism 30 is associated with the plate 26 and is operative to apply ink thereto and to scrape the plate so as to remove ink from the surface except in the areas of the etched or engraved pattern.
  • a similar transfer member and doctor assembly is provided at each of the four locations 12A to 12D, all the plates 26 being engraved with portions of the pattern and each having a different colour of printing ink applied thereto during operation whereby successive colours are applied in sequence to appropriate regions of the pattern during the printing operation.
  • the doctor mechanism 30 is shown in greater detail in Fig. 3 and comprises a support or bridge member 31 extending across the path of horizontal movement of the engraved plate 26 and supporting a horizontal shaft 32 rotatably mounted in support blocks 33 and movable between alternative positions of use by a rotary actuator 34.
  • a blade carrier 35 is mounted on the shaft 32 and carries a flexible doctor blade 36 of rubber or similar material which acts on the surface of the engraved plate during operation.
  • Threaded adjustors 37 act between the bridge member 31 and support blocks 33 to provide for adjustment of the blade 36 relative to the surface of the plate 26 on which it acts.
  • the doctor mechanism 30 is arranged both to apply ink to the plate 26 and to scrape or doctor it so as to remove the inkfrom the high points of the plate 26 but leave it in the engraved or etched portions.
  • the operation of the mechanism 30 is shown in Figs. 4A to 4D.
  • Fig. 4A shows the rest position of the unit in which the blade 36 is in an inclined position such that its free edge is spaced slightly above the surface of the plate 26.
  • the latter is adapted to be moved horizontally by means of the hydraulic cylinder 28 referred to previously and the doctor mechanism 30 is connected to a similar hydraulic cylinder 38 for movement parallel to the surface of the plate 26.
  • the cylinder 28 is retracted to maintain the plate 26 in its retracted inking position and the cylinder 38 is extended to position the doctor blade 36 in an outer position adjacent the outer end of the plate 26.
  • the doctor blade 36 When actuated at the appropriate stage in the operating cycle the doctor blade 36 is first rotated into a vertical position in which it is pressed into close contact with the surface of the engraved plate which has been previously coated with printing ink. Cylinder 38 is then retracted to draw the blade 36 across the surface of the plate 26 thereby removing ink from the high points of the surface but leaving ink in the engraved recesses corresponding to selected areas of the pattern to be applied to the articles being decorated. This position of the apparatus is shown in Fig. 4B. Thereafter the cylinders 28 and 38 are simultaneously extended to move the plate 26 and scraper assembly to their extended positions in which the plate is disposed beneath the printing pad 10.
  • Transfer of printed images from the plate 26 to the printing pad 10 and from the latter to the surface of the ware to be decorated is dependent on the temperatures of the surfaces in contact with the ink images at these different stages.
  • the transfer member incorporates heating means. Referring to Figs. 5 and 6 the engraved plate 26 is mounted in a tray 40 by means of a clamping plate 41 acted on by adjustment screws 42.
  • a heating unit comprising a top plate 43, a heater 44, an insulating plate 45 and a bottom plate 46 is clamped beneath the tray 40 and a temperature sensitive probe 47 is connected to the heater 44 and to control means operable to maintain same at a constant temperature dependent on readings from the probe.
  • the entire assembly is slidably mounted on the spaced parallel rails 27 along which it is horizontally movable by operation of the cylinder 28.
  • the ware support 11 is shown in Fig. 2 and in greater detail in Fig. 7. It comprises a carriage 50 incorporating a central mount 51 for articles of ware connected to a vacuum source operable to retain ware in position once centred by centring arms 52.
  • the carriage 50 is mounted on a pair of spaced parallel rods 53 and is directly connected to a hydraulic cylinder 54 for movement along the rods 53 by introduction of hydraulic fluid to one or other end of the cylinder.
  • Hydraulic dampers 55 are provided to arrest movement of the carriage 50 at each end of its travel which takes place in a radial direction relative to the vertical axis of the printing member 10 and at an angular location between adjacent ones of the transfer members 12.
  • the ware support 11 In its inner or printing position the ware support 11 is disposed in vertical alignment with the printing member 10.
  • the ware support 11 In its outer or loading position the ware support 11 is readily accessible to an operator or to automatic loading and unloading apparatus.
  • Figs. 8A to 8D diagramatically illustrate the printing operation.
  • the printing member 10 is shown in its raised position and one of the transfer members 12 has been located between the printing member and an article 60 to be decorated supported on the ware support 11.
  • the printing member 10 is then moved vertically downwards as shown in Fig. 8B into contact with the plate 26 from which it picks up the printing ink retained in the engraved portions of the plate.
  • the printing member 10 is then raised clear of the transfer member 12 which is withdrawn to its retracted position leaving the printing member disposed vertically above the article 60 as shown in Fig. 8C.
  • the printing member 10 is then moved vertically downwards into contact with the surface of the article 60 to transfer the printed image thereto.
  • Operation of the doctor mechanism 30 is synchronized with the printing operations in order that when one colour image is being printed onto the article 60 of ware the next engraved plate 26 is being doctored.
  • three of the plates 26 will be in an inked but not doctored condition, the first plate to come into operation will be inked and doctored and the ware support 11 will be in its retracted position accessible to an operator.
  • the operator places an article 60 on the ware support 11, following which the centring arms 52 act to centre the article 60 and suction is applied to retain it in position.
  • the cylinder 54 is then energised to move the ware support 11 to its extended position in which it is disposed vertically beneath the printing member 10.
  • the first engraved plate 26 which has been previously doctored is then moved to its extended position beneath the printing member 10 by operation of its cylinder 28.
  • the printing member 10 is then moved downwardly into contact with the engraved plate 26 to pick up the inked image and is raised again to its uppermost position.
  • Plate 26 is then withdrawn to its retracted position and the printing member 10 is moved vertically downwards into contact with the surface of the article 60 to be decorated thereby transferring the first coloured image to the article.
  • the doctor mechanism 30 on transfer member 12B is actuated to doctor the associated engraved plate 26 leaving the printing ink in the engraved image only.
  • the second engraved plate 26 carried by transfer member 12B is moved to its extended position beneath the printing member 10 and the latter is moved downwardly to pick up the inked image from the plate 26.
  • the printing member 10 is moved vertically downwards to transfer the second image to the surface of the article 60 on the ware support 11.
  • the third engraved plate 26 is doctored and the sequence continues until all four colour images have been transferred to the article 60 of ware.
  • the ware support 11 is then moved to its retracted position and the operator removes the decorated article and replaces it with a further article following which the operation is repeated.
  • multi-colour decorating of articles may be carried out extremely rapidly and accurately. Because the printing member 10 and the article 60 to be decorated remain horizontally fixed relative to one another throughout the decorating operation registration problems are substantially eliminated. Moreover by arrangement of the transfer members 12A to 12D for the different components of the pattern in radial positions around the central printing member 10 and by providing separate doctor mechanisms 30 for each unit, one image can be doctored while the other is printing thereby enabling particularly rapid operation. Moreover only a single printing member is employed regardless of the number of colours to be applied.
  • the transfer member need not be an engraved or etched plate but could be a substrate to which the design or pattern is applied by screen printing. Means could be incorporated for temperature control of the printing member and/or ware support in addition to the transfer member if required.
  • Alternative forms of doctor assembly may also be employed and while in the embodiment the machine is designed to apply four colours, any desired number of colours may be applied by increasing the number of transfer members arranged radially around the printing member.
  • the invention may be applied to the printing of a wide variety of other articles.

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  • Printing Methods (AREA)

Claims (11)

1. Machine pour l'impression polychrome, comprenant un élément imprimant (10) non rotatif, mobile dans la direction verticale, un support (11) pour l'article à décorer (60), qui peut être placé dans une position située sous l'élément imprimant (10), et une pluralité d'éléments de transfert (12) qui peuvent être séquentiellement amenés dans des positions situées entre ledit élément imprimant (10) et ledit support d'article, caractérisée en ce que les éléments de transfert (12) sont disposés angulairement autour de l'axe vertical central dudit élément imprimant (10), à un niveau situé entre cet élément et ledit support d'article (11) pour permettre de cette façon le transfert des images imprimées de ces éléments de transfert audit élément imprimant (10) pour qu'elles soient ensuite appliquées à l'article (60) monté sur ledit support.
2. Machine pour l'impression polychrome selon la revendication 1, caractérisée en ce que lesdits éléments de transfert (12) comprennent des plaques (26) de forme générale plate, sur lesquelles est gravée ou creusée une portion du motif ou de la décoration qu'il s'agit d'appliquer sur les articles (60), chaque élément de transfert (12) étant muni de moyens racleurs (36), et des moyens de commande étant prévus pour effectuer le raclage de chaque plaque (26) pendant que l'image est transférée de la plaque précédente à l'article.
3. Machine d'impression polychrome selon la revendication 2, caractérisée en ce que lesdits moyens racleurs (36) entrent en action après le transfert d'une image de la plaque (26) correspondante pour réencrer la plaque (26) en préparation du cycle de fonctionnement suivant.
4. Machine d'impression polychrome selon la revendication 3, caractérisée en ce que lesdits moyens racleurs comprennent une lame racleuse (36) montée pour décrire un mouvement de pivotement entre des positions d'encrage et de raclage et adaptée pour décrire un mouvement d'ensemble par rapport à la plaque (26) correspondante dans les deux positions de travail de cette dernière.
5. Machine d'impression polychrome selon une quelconque des revendications précédentes, caractérisée en ce que chacun des éléments de transfert (26) comprend des moyens de chauffage réglables (44) qu'on peut mettre en action pour maintenir l'élément de transfert (12) à une température qui garantira le transfert total des encres sensibles à la chaleur de l'élément de transfert (12) audit élément imprimant (10) pendant le fonctionnement.
6. Machine d'impression polychrome selon une quelconque des revendications précédentes, caractérisée en ce que ledit support d'article (11) est monté sur un chariot (50) agencé pour pouvoir se déplacer horizontalement entre une position de décoration disposée à la verticale au-dessous dudit élément imprimant (10) et une position de chargement et de déchargement qui est commode pour l'opérateur de la machine.
7. Machine d'impression polychrome selon la revendication 6, caractérisée en ce que ledit support d'article (11) peut se déplacer en coulissement dans une direction radiale par rapport audit élément imprimant (10), dans une direction angulaire intermédiaire entre les positions angulaires des éléments de transfert (12) adjacents.
8. Machine d'impression polychrome selon une quelconque des revendications précédentes, caractérisée en ce que ledit support d'article (11) comprend des moyens (52) pour centrer l'article monté sur ces moyens et pour fixer l'article centré en l'empêchant de se déplacer pendant le fonctionnement.
9. Machine d'impression polychrome selon une quelconque des revendications précédentes, caractérisée en ce que ledit élément imprimant comprend un tampon (10) de matière déformable.
10. Procédé d'impression polychrome d'articles dans lequel on dépose successivement sur l'article (60) une pluralité d'images en différentes couleurs de façon à composer le motif final ou la décoration finale, caractérisé en ce qu'on maintient l'article dans une position stationnaire fixe pendant l'application des différentes couleurs, chaque image à imprimer étant introduite, en provenance d'une position angulaire différente, sur un élément imprimant disposé en position centrale, mobile dans la direction verticale et non rotatif.
11. Procédé d'impression polychrome selon la revendication 10, caractérisé en ce que chacune des images en couleurs successives est préparée pendant l'impression de l'image précédente.
EP86300443A 1985-01-23 1986-01-23 Impression polychrome Expired - Lifetime EP0190846B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8501686 1985-01-23
GB858501686A GB8501686D0 (en) 1985-01-23 1985-01-23 Multi-colour off-set printer

Publications (3)

Publication Number Publication Date
EP0190846A2 EP0190846A2 (fr) 1986-08-13
EP0190846A3 EP0190846A3 (en) 1988-06-08
EP0190846B1 true EP0190846B1 (fr) 1990-10-10

Family

ID=10573295

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86300443A Expired - Lifetime EP0190846B1 (fr) 1985-01-23 1986-01-23 Impression polychrome

Country Status (3)

Country Link
EP (1) EP0190846B1 (fr)
DE (1) DE3674811D1 (fr)
GB (2) GB8501686D0 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2075994T3 (es) * 1991-11-25 1995-10-16 Georg Binnen Maquina de imprimir en policromia mediante tampones.
US5392706A (en) * 1992-07-30 1995-02-28 Markem Corporation Pad transfer printing method
FR2701666B1 (fr) * 1993-02-18 1995-04-14 Merlin Gerin Machine de marquage par tampographie.
US5664496A (en) * 1994-12-15 1997-09-09 Markem Corporation Doctoring ink cup
US5832835A (en) * 1996-07-12 1998-11-10 Markem Corporation Soft doctoring cup
US6123021A (en) * 1998-12-09 2000-09-26 Cameron; Robert Multiple color printer for printing on small objects
US6393981B1 (en) 1998-12-09 2002-05-28 Robert Cameron Multiple color printer having vertically moveable print pad
BE1015961A3 (nl) * 2004-03-26 2005-12-06 Volder Laurent De Inrichting voor het bedrukken van producten met onderlinge significante productvariaties met een tampon en werkwijze hiervoor.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0136759A1 (fr) * 1983-10-04 1985-04-10 MADAG Maschinen- und Apparatebau Dietikon AG Machine d'impression à tampon

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3688695A (en) * 1970-02-25 1972-09-05 Murray Curvex Printing Ltd Method of offset printing or decorating an article with thermoplastic color
US3990364A (en) * 1973-05-15 1976-11-09 Herbert Paans Multicolor offset screen printing method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0136759A1 (fr) * 1983-10-04 1985-04-10 MADAG Maschinen- und Apparatebau Dietikon AG Machine d'impression à tampon

Also Published As

Publication number Publication date
GB8501686D0 (en) 1985-02-27
DE3674811D1 (de) 1990-11-15
EP0190846A3 (en) 1988-06-08
GB2171645B (en) 1989-04-05
EP0190846A2 (fr) 1986-08-13
GB2171645A (en) 1986-09-03
GB8601624D0 (en) 1986-02-26

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