EP0802051A1 - Machine pour l'impression par tampographie - Google Patents

Machine pour l'impression par tampographie Download PDF

Info

Publication number
EP0802051A1
EP0802051A1 EP96830213A EP96830213A EP0802051A1 EP 0802051 A1 EP0802051 A1 EP 0802051A1 EP 96830213 A EP96830213 A EP 96830213A EP 96830213 A EP96830213 A EP 96830213A EP 0802051 A1 EP0802051 A1 EP 0802051A1
Authority
EP
European Patent Office
Prior art keywords
pad
inked
impression
ribbon
ink
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.)
Withdrawn
Application number
EP96830213A
Other languages
German (de)
English (en)
Inventor
Salvatore Palmeri
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.)
Palser Officina Meccanica SNC di Palmeri Salvatore e Serra Maria Paola
Original Assignee
Palser Officina Meccanica SNC di Palmeri Salvatore e Serra Maria Paola
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 Palser Officina Meccanica SNC di Palmeri Salvatore e Serra Maria Paola filed Critical Palser Officina Meccanica SNC di Palmeri Salvatore e Serra Maria Paola
Priority to EP96830213A priority Critical patent/EP0802051A1/fr
Publication of EP0802051A1 publication Critical patent/EP0802051A1/fr
Withdrawn legal-status Critical Current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

  • the present invention relates to a method and relative pad printing devices particularly suitable for the printing of identifying data, marks and similar information onto manufactured articles and products, of plastic or other material hardly suitable to be printed with common inks and/or having nonplanner printable surfaces.
  • a classical example of situations of this type are manufactured articles of manufacture such as the anatomical forms of plastic materials, usually articulated, used in the production process of footwear as modeling and assemblage supports of the different footwear components.
  • pad printing is the printing method used for these applications.
  • This method involves the steps of inking an incised surface (in negative or in positive) of a cliché, the picking-up of an inked impression by a transfer pad by pressing it against the inked face of the cliché, and the transfer onto the workpiece surface of the inked impression by pressing the pad on the surface to be printed.
  • the ink impression so transferred on the surface of the workpiece is eventually fixed permanently by means of a fast heat treatment.
  • the pad is commonly made up of a rounded body or cushion of a silicon elastomer that is mechanically pressed in a precisely pre-set and reproducible manner and driven sequentially against the inked surface of the cliché and against the surface of the workpiece.
  • the nature of the silicon material and the stringent requisites of repeatability of the picking-up conditions of the inked impression and of transfer on the surface of the workpiece are such as to assure a precise transfer of a highly defined impression.
  • wet-on-wet Numerous pad printing machines of a high degree of automation, for single or multicolor printing according to a printing procedure referred to as "wet-on-wet", are known wherein three or four dye components are repeatedly applied by overlapping the one onto the other on the workpiece, drawing the respective impressions components from different clichés inked with base colors.
  • a recurrent requisite of printing the workpieces with or just with one progressive numeration is usually overcome by incorporating in the ink taking-up clichés a conventional updatable multidigit numerator device, capable of being automatically incremented or programmed.
  • An example of an automatic pad printing machine is the model "Pad Printer” PP-29-MC-E, made by Kent Engineering Co., Ltd. of Hong Kong.
  • the machine is provided with a plurality of pads and a retractable shelf upon which are installed the clichés, which through a reciprocal motion of the shelf, undergo sequentially the inking, through a standard self-leveling "doctor blade" system, during a retraction phase of the shelf that corresponds to the lowering phase of the pads previously inked on workpieces conveyed on the machine's bench.
  • the clichés are brought again under the pads during a successive extension phase of the shelf that carries them, during which the pads lowers themselves again over the cliché for taking-up the ink.
  • inkable cliché including or not an updatable numerator
  • an updatable numerator is such to require a certain consumption of ink, part of which is lost and collected with an evident waste of excess ink.
  • the type of ink needed for permanently printing materials that are particularly refractory to fixing standard inks must have a formulation that includes compounds, generally regarded as unhealthy in case of prolonged exposures to the vapors of the ink. Even by implementing vacuum and/or ventilation measures for safety of the operators, the result is however a dispersion in the atmosphere of these compounds.
  • Another recurrent problem may be generated by the peculiar rheologic characteristics and viscosity of the ink that, especially in the case of updatable numerators installed through appropriate windows of the cliché, has the tendency of accumulating and thickening in the necessary clearance spaces of the updatable rollers of the numerator and of being eventually picked-up by the pad and thus transferred onto the workpiece in the form of blurs and improper marking.
  • This situation necessitates of a frequent cleanings of the clichés and of the updatable numerators mechanisms.
  • the present invention obviates all these problems and drawbacks. It relates to an improved method of pad printing capable of drastically reducing the consumption of ink, of reducing to negligible amounts the emissions of vapors of the ink and of practically eliminating the necessity of periodic cleaning operations of the inkable clichés.
  • the method of the invention and the relative equipment that implements it are characterized by the elimination of the inkable clichés and by replacing their function with a disposable type of inking support for the impression to be transferred on the workpiece.
  • Said dispensable inking support has a surface writable that may be readily with an appropriate writing system, preferably so-called inkjet printing system.
  • the inkjet impression on the writable surface of the disposable support is then picked up by the pad in a normal manner and is transferred from the pad onto the surface of the printable workpiece, in a conventional manner.
  • the inking of the writable surface of the disposable support may be accomplished by the use of the writing head of an inkjet printer, suitably mounted on a block movable along three axis under numerical control of a processor, in a way similar to the tracing pen of a conventional plotter.
  • the writable disposable support may be typically a ribbon of sufficient width, unwound in a virgin state from a feeding bobbin and rewound in a recovery bobbin to be eventually disposed.
  • the disposable ribbon support is incrementally advanced from an inkjet writing position to ink the impression to a picking-up position of the inked impression by the pad.
  • the support material may be a textile ribbon of a natural or synthetic material with characteristics suitable to furnish a writable surface having an optimizable microporosity in order to facilitate the inking by the inkjet head without blurrings, smears or loss of contour definition.
  • the back face of the ribbon (opposite to the writeable surface) may be sealed by waxing it if necessary or useful in consideration of the porosity of the fabric and the rheologic characteristics of the ink used.
  • the machine architecture for sequentially perform defining an inked impression onto the face of a fresh segment of the disposable ribbon, advancing the inked portion of the ribbon to an impression picking-up position of by the pad pressed onto the inked area of the disposable ribbon, retracting the inked pad, positioning and lowering it onto the surface of the printable workpiece, simultaneously to the printing of a new impression onto a new fresh segment of the disposable ribbon, may be devised and arranged in different ways, according to general suitability criteria and/or requisites of the particular pad-printing applications.
  • the controlling processor of an inkjet plotter printing head is programmed for automatically placing the printing head inside a receptacle after a certain period of inactivity that is to a stand-by condition (waiting for subsequent printing commands.)
  • a stand-by condition waiting for subsequent printing commands.
  • the machine comprises a bench or platform above which, a system of automatic advancement of the items to be printed may be realized according to any conventional technique for automatically conveying workpieces through a generic work station.
  • these items of manufacture are forms 2 of a plastic material 2 for the manufacture of footwear 2.
  • the transfer pad of the inked impression has in a dual form, the pair of pads (3a and 3b) are mounted on an arm 4 supported by an overhanging axle 5 which can rotate by 180°, thus reversing the position of the two pads 3a and 3b.
  • the arm 5 can be lifted upwards during an ink picking-up phase of the pad 3a that is currently located in the upper position and can be lowered during the printing phase of a workpiece 2 by the pre-inked pad that is currently in the lower position 3b.
  • the position of the pads alternates during the cyclic operation of the printer.
  • a frame 6 supports the preplotting assembly indicated as a whole with number 7, including an inkjet printing head 8.
  • An ink reservoir 9 feeds the printing head through the flexible tube 10.
  • the block 11 that carries the printing head 8 moves along three orthogonal axes, by the action of standard moving mechanisms such as those normally employed in plotters.
  • the dispensable support on which the impression to be transferred by the pad is predefined (inked) is constituted of a ribbon 12 that unwounds from a feeding roller 13 and rewinds itself on a disposable roller 14.
  • Suitable guide rollers 15 and 16 cooperate with a driving roller 17 in guiding the continuous ribbon 12 during its advancing per increments produced by a stepping motor.
  • the ribbon 12 runs over smooth surfaces of a block 18, rigidly supported by the frame 6 by means of robust anchor pins so that the upper surface thereof, upon which the ribbon 12 runs, and the lower surface of the block 18 on which runs the same ribbon 12 may provide, the first, for a rigid support of the ribbon 12 during the writing thereon of an inked impression by the inkjet head 8, and, the second, for a perfectly rigid support to the upper pad 3a when this is pressed against the previously inked face of the ribbon 12, which was incrementally advanced by the motor to the position picking-up of the ink by the pad.
  • a processor controls the timing of the incremental advancing of the ribbon 12 from an inking position 12a to an ink taking-up position 12b by the pad, coordinating the writing and incremental advancing of the ribbon in synchronism with the printing of the workpiece by the pre-inked pad 3d, the lifting and rotation of the arm 5 to invert the position of the pads, and the successive lifting of the arm 5 to perform a new ink taking by the pad just returned to the position 3a.
  • cleaning means may be installed in order to clean the pad surface after each printing phase of the workpiece.
  • such means could be operational during the turning by 180° of the arm 5, in a way that in rising from the position 3b to the position 3a the pad rubs on a soft cleaning padding.
  • the definition of the inked impression on the face of the disposable support, carried out by means of an inkjet printing head permits an outstanding freedom in programming the impressions with any graphic characteristic, numbering and/or explanatory details or wardings in a continually and progressively updatable manner, without requiring the use of a large inventory of clichés or the employment of updatable numerators set in the inkable cliché.
  • the result of this is an extreme flexibility of the pad printer obtained with a relatively contained cost.
  • Another advantage is the possibility offered of defining colored impressions by employing a plurality of inkjet heads each fed with an ink of a base color and positionable and excitable in sequence and in overlap, as in a common color printer.
  • the disposable ribbon 12 may be a ribbon of a cloth of natural or synthetic fiber, for example of the type commonly used in serigraphy, preferably waxed or dressed on the face opposite to the printing face with a layer of impervious material.
  • Other types of microporous ribbons may be used in alternative to a textile ribbon, for example a ribbon of plastic material made sufficiently microporous on the inkable face, or a composite ribbon obtained through laminating together a microporous film and a non porous film, are suitable materials.

Landscapes

  • Impression-Transfer Materials And Handling Thereof (AREA)
EP96830213A 1996-04-16 1996-04-16 Machine pour l'impression par tampographie Withdrawn EP0802051A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP96830213A EP0802051A1 (fr) 1996-04-16 1996-04-16 Machine pour l'impression par tampographie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96830213A EP0802051A1 (fr) 1996-04-16 1996-04-16 Machine pour l'impression par tampographie

Publications (1)

Publication Number Publication Date
EP0802051A1 true EP0802051A1 (fr) 1997-10-22

Family

ID=8225880

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96830213A Withdrawn EP0802051A1 (fr) 1996-04-16 1996-04-16 Machine pour l'impression par tampographie

Country Status (1)

Country Link
EP (1) EP0802051A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000020219A1 (fr) * 1998-10-06 2000-04-13 Spalding Sports Worldwide, Inc. Procede de formation de reperes a la surface d'une balle de jeu au moyen d'une imprimante a jet d'encre
EP1053882A2 (fr) * 1999-05-20 2000-11-22 Illinois Tool Works Inc. Système amélioré d'impression multicolore au tampon
DE19926185A1 (de) * 1999-06-09 2000-12-14 Ulrich Muehlhaeuser Variodruckmaschine, insbesondere Tampondruckmaschine
WO2001025022A1 (fr) * 1999-10-06 2001-04-12 Spalding Sports Worldwide, Inc. Procede de formation d'empreintes sur une surface de balle de jeu au moyen d'une imprimante a jet d'encre
US6840167B2 (en) 2002-01-24 2005-01-11 Lloyd Douglas Clark Multi-color pad printing apparatus and method
US7048651B2 (en) 1998-10-06 2006-05-23 Callaway Golf Company Golf Ball
WO2009153685A2 (fr) * 2008-06-21 2009-12-23 Itw Morlock Gmbh Machine à imprimer en tampographie
EP2628594A1 (fr) 2012-02-15 2013-08-21 Durst Phototechnik Digital Technology GmbH Dispositif d'impression digitale par tampographie
CN108749297A (zh) * 2018-06-20 2018-11-06 东莞市基汇实业有限公司 一种数码打印和钢板移印复合一体机

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4411213A1 (de) * 1994-03-31 1995-10-05 Abb Patent Gmbh Druckmaschine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4411213A1 (de) * 1994-03-31 1995-10-05 Abb Patent Gmbh Druckmaschine

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2361337B (en) * 1998-10-06 2003-11-12 Spalding Sports Worldwide Inc Printing indicia on game balls
GB2357736A (en) * 1998-10-06 2001-07-04 Spalding Sports Worldwide Inc Method of forming indicia on a game ball surface using an ink jet printer
WO2000020219A1 (fr) * 1998-10-06 2000-04-13 Spalding Sports Worldwide, Inc. Procede de formation de reperes a la surface d'une balle de jeu au moyen d'une imprimante a jet d'encre
GB2357736B (en) * 1998-10-06 2002-09-11 Spalding Sports Worldwide Inc Method of forming indicia on a game ball surface using an ink jet printer
AU760798B2 (en) * 1998-10-06 2003-05-22 Callaway Golf Company Method of forming indicia on a game ball surface using an ink jet printer
US7048651B2 (en) 1998-10-06 2006-05-23 Callaway Golf Company Golf Ball
EP1053882A2 (fr) * 1999-05-20 2000-11-22 Illinois Tool Works Inc. Système amélioré d'impression multicolore au tampon
JP2001018362A (ja) * 1999-05-20 2001-01-23 Illinois Tool Works Inc <Itw> 改良型多色刷りパッド式印刷装置
EP1053882A3 (fr) * 1999-05-20 2001-12-19 Illinois Tool Works Inc. Système amélioré d'impression multicolore au tampon
DE19926185A1 (de) * 1999-06-09 2000-12-14 Ulrich Muehlhaeuser Variodruckmaschine, insbesondere Tampondruckmaschine
WO2001025022A1 (fr) * 1999-10-06 2001-04-12 Spalding Sports Worldwide, Inc. Procede de formation d'empreintes sur une surface de balle de jeu au moyen d'une imprimante a jet d'encre
GB2370015A (en) * 1999-10-06 2002-06-19 Spalding Sports Worldwide Inc Method of forming indicia on a game ball surface using an ink jet printer
US6840167B2 (en) 2002-01-24 2005-01-11 Lloyd Douglas Clark Multi-color pad printing apparatus and method
WO2009153685A2 (fr) * 2008-06-21 2009-12-23 Itw Morlock Gmbh Machine à imprimer en tampographie
DE102008029558A1 (de) * 2008-06-21 2009-12-24 Itw Morlock Gmbh Tampondruckmaschine
WO2009153685A3 (fr) * 2008-06-21 2010-03-18 Itw Morlock Gmbh Machine à imprimer en tampographie
DE102008029558B4 (de) * 2008-06-21 2012-06-21 Itw Morlock Gmbh Tampondruckmaschine
EP2628594A1 (fr) 2012-02-15 2013-08-21 Durst Phototechnik Digital Technology GmbH Dispositif d'impression digitale par tampographie
DE102013000835A1 (de) 2012-02-15 2013-08-22 Durst Phototechnik Digital Technology Gmbh Digitaltampondruckvorrichtung
CN108749297A (zh) * 2018-06-20 2018-11-06 东莞市基汇实业有限公司 一种数码打印和钢板移印复合一体机

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