EP0681526A1 - Printing process using stamp. - Google Patents

Printing process using stamp.

Info

Publication number
EP0681526A1
EP0681526A1 EP94905023A EP94905023A EP0681526A1 EP 0681526 A1 EP0681526 A1 EP 0681526A1 EP 94905023 A EP94905023 A EP 94905023A EP 94905023 A EP94905023 A EP 94905023A EP 0681526 A1 EP0681526 A1 EP 0681526A1
Authority
EP
European Patent Office
Prior art keywords
printing
medium
printing form
pad
pressure
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
EP94905023A
Other languages
German (de)
French (fr)
Other versions
EP0681526B1 (en
Inventor
Hans-Rainer Hoffmann
Bodo Asmussen
Klaus Schumann
Walter Mueller
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.)
LTS Lohmann Therapie Systeme AG
Original Assignee
LTS Lohmann Therapie Systeme AG
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 LTS Lohmann Therapie Systeme AG filed Critical LTS Lohmann Therapie Systeme AG
Publication of EP0681526A1 publication Critical patent/EP0681526A1/en
Application granted granted Critical
Publication of EP0681526B1 publication Critical patent/EP0681526B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/20—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material for applying liquid or other fluent material only at particular parts of the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F1/00—Platen presses, i.e. presses in which printing is effected by at least one essentially-flat pressure-applying member co-operating with a flat type-bed
    • B41F1/26—Details
    • B41F1/40—Inking units
    • 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 known technique of pad printing processes has some shortcomings, which essentially depend on the dosing accuracy of the printing medium when filling the printing form e.g. with the help of a dosing pot from above.
  • this dosing accuracy has recently gained importance when, according to DE 377 232, the pad printing method is used for dosing active pharmaceutical ingredients.
  • the filling process is controlled by the action of an intermittent pressure on the pressure medium, the metering of the quantity of pressure medium to be entered into the printing form being controlled by the length of the phase of the delivery pressure and / or the level of the delivery pressure.
  • Another possibility is to convey the pressure medium into the printing form by means of a volume metering unit, for example a piston or hose pump.
  • the advantage of this variant is that the filling of the printing form is largely independent of the viscosity of the printing medium.
  • the pressure medium Before entering the feed channels, the pressure medium is advantageously passed through a collecting space for pressure equalization and introduced from there into the individual feed channels. It can be expedient here that, in order to build up different flow resistances when pressure medium passes through the individual channels, these are formed with different flow cross sections and / or length dimensions.
  • the printing form can be filled with printing medium at a temperature which differs from room temperature and is preferably elevated. The temperature levels desired for the filling process can be set by means of temperature control elements in the pressure plate and / or on the prechamber. One reason for this may be the need to influence the viscosity of the printing medium.
  • the entire range of motion in this tampon printing process relates to the conveyance of the carrier tape and a pure upward and downward stroke of the tampon and the supply of the pressure medium from below, which can be accomplished, for example, by a displacement conveyor similar to a fuel injection pump.
  • An air jet can be used, for example, to lift the tape off the printed image at the same time as lifting the tampon.
  • Figure 1 In cross section a printing form with a collecting space for filling from below by means of feed channels;
  • Figure 2 A cross section through the bottom of another printing form
  • FIG. 5 in cross section a printing form with tempering devices
  • Figure 1 shows a printing form 1, which is incorporated in a printing plate 2, with feed channels 9, which are in the bottom of the Open printing form 1, are connected to a collecting space 7.
  • This collecting space 7 serves to equalize the delivery pressure for the pressure medium conveyed under pressure from a pressure medium reservoir (not shown) through the supply line 15. It can be seen that by supplying the printing medium from below from the line 15 via the collecting space 7 and through the multiplicity of channels 9, the printing form 1 is filled with printing medium with great advantage from the underside.
  • the channels 9 pass through the pressure plate 2.
  • FIG. 2 shows another embodiment of the feed channels 9 with ramifications 10, a collecting space 7 and mouth areas 14 in the bottom of the printing form 1.
  • the channels 9 can, for example, be cannulas of very small diameter and expediently open out as a sieve plate 4, in which case the pressure medium is distributed evenly over the surface of the printing form by the large number of pores 4, as is shown in the top view of FIG.
  • the top view of a part of the printing plate 2 with a printing form 1 in FIG. 3 shows a large number of orifices 5 of individual channels 9 in the bottom or in the mouth region of the channels 9 in the bottom of the printing form 1, which are distributed geometrically over the area of the printing form 1.
  • the doctoring process which was previously necessary from above when filling the printing form, including the associated avoided disadvantages.
  • the metering of the pressure medium - in particular in the case of a medium containing the active substance - can be carried out with the greatest precision, a significant increase in productivity and thus a reduction in production costs being achievable as a result of significantly shorter cycle times.
  • Such short cycle times as are now possible with the invention, were previously not achievable due to the required mechanical working movement of the device parts.
  • the method can advantageously be used in transfer processes in which flowable media are to be transferred from a storage container to a substrate as a carrier by means of cyclically defined metering.
  • the belt 20 is then stopped for the duration of a printing process and brought into contact with the printing form under pressure by the tampon 22.
  • the print image is then transferred or printed from the printing form 1 onto the carrier 20.
  • the tampon 22 is raised, the band is lifted off the printing form 1 and conveyed on by a grid spacing.
  • the printing form 1 is filled with printing medium from below for the following printing process. Taking off the printed ten tape 20 from the printing form 1 can be done for example with the aid of blowing nozzles 23. Now there are printed images 24 on the underside of the tensioned belt which have to be dried.
  • a drying station 25 can be located at a distance from the printing station, in which the fresh print image is dried using known means, for example in a hot air tunnel.
  • the printed carrier can then be wound onto a nickel drum 26.
  • devices for the assembly can also be provided.
  • the invention is not limited exclusively to the embodiments shown in the examples; for example, configurations of the devices for multiple printing can be provided, printing forms can be produced by etching, engraving, electroerosion and the feed channels at the base of a printing form 1 be arranged in any distribution.
  • the new printing method according to the invention opens up new and economical ways for exact dosing, in particular of active pharmaceutical ingredients, with extremely economical means and working methods. In this respect, the invention represents an optimal solution to the problem stated at the outset.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Methods (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Production Of Multi-Layered Print Wiring Board (AREA)
  • Electronic Switches (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Printing Plates And Materials Therefor (AREA)

Abstract

A tampon printing process which uses a printing plate having at least one printing form at its surface, wherein the printing form is filled with printing medium at time intervals and the printing medium is subsequently transferred from the printing form onto a support by means of a tampon.

Description

Tampondruckverfahren Pad printing process
B E S C H R E I B U N GDESCRIPTION
Die Erfindung betrifft ein Tampondruckverfahren unter Ver¬ wendung einer an ihrer Oberfläche wenigstens eine Druckform aufweisenden Druckplatte, wobei die Druckform jeweils in zeitlichen Intervallen mit Druckmedium befüllt und das Druckmedium anschließend mit Hilfe eines Tampons von der Druckform auf einen Träger übertragen wird.The invention relates to a tampon printing process using a printing plate having at least one printing form on its surface, the printing form being filled with printing medium at intervals and the printing medium subsequently being transferred from the printing form to a support using a tampon.
Tampondruckverfahren als spezielle Art eines Tiefdruckver¬ fahrens sind schon länger bekannt. Dabei ist das Druckbild als Negativ in der Druckform einer Druckplatte vertieft, eingeätzt oder eingraviert. Das Negativ kann auch durch Elektroerosion in der Druckplatte hergestellt werden. Ein meist auf Silikonkautschuk-Basis gestalteter Übertragungs- körper, der sog. Tampon, nimmt das Druckmedium, welches nach einem Rakelvorgang in Vertiefungen der Druckform ver¬ blieben ist auf, und überträgt das Druckbild auf den zu beschriftenden bzw. zu dekorierenden Träger bzw. Gegen¬ stand. Eine derartige Tampondruckvorrichtung ist beispiels¬ weise in der DE-OS 19 39 437 beschrieben.Pad printing processes as a special type of gravure printing process have been known for some time. The print image is deepened, etched or engraved in the printing form of a printing plate as a negative. The negative can also be produced by electroerosion in the printing plate. A transfer body, usually designed on the basis of silicone rubber, the so-called tampon, takes up the printing medium which has remained in depressions in the printing form after a doctoring process and transfers the printed image to the support or counter to be labeled or decorated ¬ stand. Such a pad printing device is described, for example, in DE-OS 19 39 437.
Die bekannte Technik der Tampondruckverfahren weist jedoch einige Mängel auf, die im wesentlichen mit der DosierGenau¬ igkeit des Druckmediums bei der Befüllung der Druckform z.B. mit Hilfe eines Dosiertopfes von oben zusammenhängen. Diese Dosiergenauigkeit hat aber gerade in jüngster Zeit an Bedeutung gewonnen, wenn gemäß der DE- _)S 37 27 232 das Tam¬ pondruckverfahren zur Dosierung von Arzneimittelwirkstoffen herangezogen wird.However, the known technique of pad printing processes has some shortcomings, which essentially depend on the dosing accuracy of the printing medium when filling the printing form e.g. with the help of a dosing pot from above. However, this dosing accuracy has recently gained importance when, according to DE 377 232, the pad printing method is used for dosing active pharmaceutical ingredients.
Als Mängel haben sich herausgestellt:The following have emerged as defects:
- Nachtropfen des zum Auftragen von Dosiermedium verwende¬ ten Dosiertopfes bei dessen Relativbewegung zur Druckform, - unerwünschte Temperaturveränderungen des Druckmediums bei der Relativbewegung zwischen Dosiertopf und Dosierform bzw. Druckplatte, und- dripping of the dosing pot used to apply the dosing medium during its relative movement to the printing form, - undesirable temperature changes in the pressure medium during the relative movement between the metering cup and dosage form or pressure plate, and
- unerwünschte Luf einschlüsse beim Kontakt der entleerten Druckform mit dem Dosiertopf,- undesirable air inclusions when the emptied printing form contacts the metering pot,
- Zeitverluste infolge der Relativbewegungen des Dosiertop¬ fes zur Druckplatte.- Loss of time due to the relative movements of the dosing pot to the pressure plate.
Der Erfindung liegt die Aufgabe zugrunde, durch Verbesse¬ rung der bisherigen Tampondruckverfahren die vorgenannten Nachteile, technischen Grenzen und Schwierigkeiten zu über¬ winden und ein Tampondruckverfahren anzugeben, durch wel¬ ches mit hoher Genauigkeit insbesondere bei der Dosierung von Arzneimittelwirkstoffen sowie mit erhöhter Produktions- geschwindigkeit mit hoher Präzision gearbeitet werden kann.It is the object of the invention to overcome the abovementioned disadvantages, technical limits and difficulties by improving the previous tampon printing processes and to provide a tampon printing process by means of which high accuracy is achieved, in particular in the metering of active pharmaceutical ingredients, and with increased production speed can be worked with high precision.
Zur Lösung der Aufgabe wird bei einem Tampondruckverfahren der im Oberbegriff von Anspruch 1 genannten Art mit der Erfindung vorgeschlagen, daß die Befüllung der Druckform mit Druckmedium von der Bodenseite der Druckform her unter Verwendung von die Druckform mit einem Speicher des Druck¬ mediums verbindenden und die Druckplatte von unten her durchsetzenden Zufuhrkanälen vorgenommen wird. Mit Vorteil durchströmt dabei das Druckmedium die Druck¬ platte von unten her durchsetzende Zufuhrkanäle und tritt unmittelbar im Boden der Druckform aus. Hierfür sind die Kanäle an entsprechend vielen Stellen geometrisch sinnvoll über das Bodenareal der Druckform verteilt angeordnet und ausgestaltet, wobei runde, eckige oder schlitz- oder sieb¬ artige Mündungsformen für eine gleichmäßige Verteilung des Druckmediums auf dem Boden der Druckform sorgen. Der Befül- lungsvorgang wird durch Einwirkung eines intermittierenden Druckes auf das Diruckmedium gesteuert, wobei die Dosierung der in die Druckform einzutragenden Menge von Druckmedium durch die Länge der Phase des Förderdruckes und/oder die Höhe des Förderdruckes gesteuert wird. Eine weitere Möglichkeit besteht darin, das Druckmedium mittels einer Volumendosiereinheit, etwa einer Kolben- oder Schlauchpumpe, in die Druckform zu fördern. Der Vorteil dieser Variante besteht darin, daß die Befüllung der Druck¬ form weitgehend unabhängig von der Viskosität des Druckme¬ diums ist.To achieve the object is proposed in a pad printing method of the type mentioned in the preamble of claim 1 with the invention that the filling of the printing form with printing medium from the bottom of the printing form using the printing form with a memory of the Druck¬ medium connecting and the printing plate feed channels penetrating from below are carried out. In this case, the printing medium advantageously flows through feed channels penetrating the printing plate from below and emerges directly in the bottom of the printing form. For this purpose, the channels are arranged and designed in a geometrically sensible manner at a correspondingly large number of locations over the bottom area of the printing form, with round, angular or slit-like or sieve-like mouth forms ensuring a uniform distribution of the printing medium on the bottom of the printing form. The filling process is controlled by the action of an intermittent pressure on the pressure medium, the metering of the quantity of pressure medium to be entered into the printing form being controlled by the length of the phase of the delivery pressure and / or the level of the delivery pressure. Another possibility is to convey the pressure medium into the printing form by means of a volume metering unit, for example a piston or hose pump. The advantage of this variant is that the filling of the printing form is largely independent of the viscosity of the printing medium.
Vorteilhaft wird das Druckmedium vor Eintritt in die Zu¬ fuhrkanäle zur Druckvergleichmäßigung durch einen Sammel¬ raum hindurchgeführt und aus diesem in die einzelnen Zu¬ fuhrkanäle eingeführt. Dabei kann es zweckmäßig sein, daß zum Aufbau unterschiedlicher Strömungswiderstände beim Durchtritt von Druckmedium durch die einzelnen Kanäle diese mit unterschiedlichen Strömungsquerschnitten und/oder Län¬ genabmessungen ausgebildet werden. Weiterhin kann mit Vor¬ teil bei dem neuen Tampondruckverfahren die Befüllung der Druckform mit Druckmedium bei von Raumtemperatur abweichen¬ der und vorzugsweise erhöhter Temperatur vorgenommen wer¬ den. Durch Temperierelemente in der Druckplatte und/oder an der Vorkammer lassen sich für den Befüllungsvorgang ge¬ wünschte Temperaturniveaus einstellen. Anlaß dazu kann bei¬ spielsweise die Notwendigkeit der Beeinflussung der Visko¬ sität des Druckmediums sein.Before entering the feed channels, the pressure medium is advantageously passed through a collecting space for pressure equalization and introduced from there into the individual feed channels. It can be expedient here that, in order to build up different flow resistances when pressure medium passes through the individual channels, these are formed with different flow cross sections and / or length dimensions. Furthermore, with the new pad printing method, the printing form can be filled with printing medium at a temperature which differs from room temperature and is preferably elevated. The temperature levels desired for the filling process can be set by means of temperature control elements in the pressure plate and / or on the prechamber. One reason for this may be the need to influence the viscosity of the printing medium.
Ein sehr vorteilhaftes Tampondruckverfahren, wobei die Druckform in zeitlich wiederholten Intervallen einer Folge von Arbeitszyklen jeweils mit Druckmedium befüllt wird, ergibt sich mit der Erfindung dadurch, daß der Träger in Form eines Bandes unter Spannung intermittierend und in ge¬ ringem Abstand über die Druckform geführt und dabei während der Phase der Befüllung der Druckform jeweils um einen Rasterabstand gefördert und sodann für die Dauer eines Druckvorganges angehalten und durch einen Tampon gegen die Druckform zur Anlage gebracht wird, worauf der Tampon an¬ gehoben, das Band von der Druckform abgehoben, um einen Rasterabstand weitergefördert und währenddessen die Druck¬ form für den folgenden Arbeitszyklus mit Druckmedium von unter her befüllt wird. Auf diese Weise bleibt der Tampon frei von Druckmedium und sauber, so daß ein Verschmieren des Druckbildes vollständig vermieden wird. Das gesamte Bewegungsspiel bei diesem Tampondruckverfahren betrifft die Förderung des Trägerbandes und einen reinen Aufwärts- und Abwärtshub des Tampons sowie die Zuführung des Druckmediums von unten her, welche beispielsweise durch einen Verdrän¬ gungsförderer ähnlich einer Kraftstoffeinspritzpumpe be¬ werkstelligt werden kann. Zum Abheben des Bandes vom Druck¬ bild zugleich mit dem Anheben des Tampons kann beispiels¬ weise ein Luftstrahl verwendet werden.A very advantageous tampon printing process, the printing form being filled with printing medium at repeated intervals of a sequence of working cycles, results from the invention in that the carrier in the form of a tape is passed intermittently and at a short distance over the printing form and during the phase of filling the printing form in each case conveyed by a grid spacing and then stopped for the duration of a printing process and brought into contact with the printing form by means of a tampon, whereupon the tampon was raised and the ribbon was lifted off the printing form by a grid spacing conveyed further and meanwhile the printing form for the following working cycle with printing medium from is filled below. In this way, the tampon remains free of print medium and clean, so that smearing of the printed image is completely avoided. The entire range of motion in this tampon printing process relates to the conveyance of the carrier tape and a pure upward and downward stroke of the tampon and the supply of the pressure medium from below, which can be accomplished, for example, by a displacement conveyor similar to a fuel injection pump. An air jet can be used, for example, to lift the tape off the printed image at the same time as lifting the tampon.
Die Erfindung wird in Zeichnungen in beispielhaften Ausfüh¬ rungsformen gezeigt, wobei aus diesen weitere Einzelheiten und Vorteile entnehmbar sind. Es zeigen:The invention is shown in drawings in exemplary embodiments, from which further details and advantages can be derived. Show it:
Figur 1: Im Querschnitt eine Druckform mit Sammelraum zur Befüllung von unten mittels Zufuhrkanälen;Figure 1: In cross section a printing form with a collecting space for filling from below by means of feed channels;
Figur 2 : Einen Querschnitt durch den Boden einer anderen Druckform;Figure 2: A cross section through the bottom of another printing form;
Figur 3: In Draufsicht eine Druckform mit auf deren Boden in geometrischer Verteilung angeordneten Kanalmündungen;FIG. 3: a plan view of a printing form with channel openings arranged in a geometrical distribution on the bottom thereof;
Figur 4: Eine Draufsicht auf eine andere Druckform mit siebartig gestaltetem Bodenbereich;Figure 4: A plan view of another printing form with a sieve-like bottom area;
Figur 5 : Im Querschnitt eine Druckform mit Temperierein¬ richtungen;FIG. 5: in cross section a printing form with tempering devices;
Figur 6: Einen rein schematischen Stammbaum eines Druck¬ verfahrens nach der Erfindung.Figure 6: A purely schematic family tree of a printing process according to the invention.
Figur 1 zeigt eine Druckform 1, die in einer Druckplatte 2 eingearbeitet ist, wobei Zufuhrkanäle 9, die im Boden der Druckform 1 ausmünden, mit einem Sammelraum 7 verbunden sind. Dieser Sammelraum 7 dient zur Vergleichmäßigung des Förderdruckes für das aus einem nicht gezeigten Druckmit¬ telspeicher durch die Zufuhrleitung 15 unter Druck geför¬ derte Druckmedium. Es ist ersichtlich, daß durch die Zufuhr des Druckmediums yon unten her aus der Leitung 15 über den Sammelraum 7 und durch die Vielzahl von Kanälen 9 die Druckform 1 mit großem Vorteil von der Unterseite her mit Druckmedium befüllt wird. Dabei durchsetzen die Kanäle 9 die Druckplatte 2.Figure 1 shows a printing form 1, which is incorporated in a printing plate 2, with feed channels 9, which are in the bottom of the Open printing form 1, are connected to a collecting space 7. This collecting space 7 serves to equalize the delivery pressure for the pressure medium conveyed under pressure from a pressure medium reservoir (not shown) through the supply line 15. It can be seen that by supplying the printing medium from below from the line 15 via the collecting space 7 and through the multiplicity of channels 9, the printing form 1 is filled with printing medium with great advantage from the underside. The channels 9 pass through the pressure plate 2.
Figur 2 zeigt eine andere Ausgestaltung der Zufuhrkanäle 9 mit Verästelungen 10, einem Sammelraum 7 und Mündungsberei¬ chen 14 im Boden der Druckform 1. Die Kanäle 9 können bei¬ spielsweise Kanülen sehr kleinen Durchmessers sein und zweckmäßig als Siebplatte 4 ausmünden, wobei dann das Druckmedium durch die Vielzahl von Poren 4 gleichmäßig über die Fläche der Druckform verteilt wird, wie dies in der Draufsicht der Figur 4 gezeigt ist.FIG. 2 shows another embodiment of the feed channels 9 with ramifications 10, a collecting space 7 and mouth areas 14 in the bottom of the printing form 1. The channels 9 can, for example, be cannulas of very small diameter and expediently open out as a sieve plate 4, in which case the pressure medium is distributed evenly over the surface of the printing form by the large number of pores 4, as is shown in the top view of FIG.
Die Draufsicht auf einen Teil der Druckplatte 2 mit einer Druckform 1 in der Figur 3 zeigt eine Vielzahl geometrisch über die Fläche der Druckform 1 verteilter Ausmündungen 5 einzelner Kanäle 9 im Boden bzw. im Mündungsbereich der Kanäle 9 im Boden der Druckform 1.The top view of a part of the printing plate 2 with a printing form 1 in FIG. 3 shows a large number of orifices 5 of individual channels 9 in the bottom or in the mouth region of the channels 9 in the bottom of the printing form 1, which are distributed geometrically over the area of the printing form 1.
Figur 5 zeigt einen Querschnitt durch einen Teil einer Druckplatte 2, die einen mit Durchlässen versehenen Boden der Druckform 1 aufweist, welche über einen Sammelraum 7 von unten mit Druckmedium befüllbar ist. Das den Sammelraum 7 bildende Vorsatzstück 16 ist mittels einer Dichtung 11 sowie Verschraubungen 17 mit der Druckplatte 2 verbunden. In der Druckplatte 2 sind Temperierelemente 12 und 13 ange¬ bracht, mit deren Hilfe eine Thermostatisierung der Druckplatte ermöglicht wird.FIG. 5 shows a cross section through part of a printing plate 2 which has a bottom of the printing form 1 provided with passages, which can be filled with pressure medium from below via a collecting space 7. The header 16 forming the collecting space 7 is connected to the pressure plate 2 by means of a seal 11 and screw connections 17. In the pressure plate 2 temperature control elements 12 and 13 are attached, by means of which the pressure plate can be thermostatted.
Mit dem erfindungsgemäßen Verfahren wird mit großem Vorteil der bisher beim Befüllen der Druckform von oben her erfor¬ derliche Abrakelvorgang einschließlich der damit verbünde- nen Nachteile vermieden. Die Dosierung des Druckmediums - insbesondere bei wirkstoffhaltigem Medium - kann mit höch¬ ster Präzision vorgenommen werden, wobei darüber hinaus infolge signifikant verkürzter Taktzeiten eine wesentliche Erhöhung der Produktivität und damit Verringerung der Pro¬ duktionskosten erreichbar ist. Derart kurze Taktzeiten, wie sie nunmehr mit der Erfindung möglich werden, waren bisher aufgrund der erforderlichen mechanischen Arbeitsbewegung der Vorrichtungsteile nicht erreichbar.With the method according to the invention, the doctoring process, which was previously necessary from above when filling the printing form, including the associated avoided disadvantages. The metering of the pressure medium - in particular in the case of a medium containing the active substance - can be carried out with the greatest precision, a significant increase in productivity and thus a reduction in production costs being achievable as a result of significantly shorter cycle times. Such short cycle times, as are now possible with the invention, were previously not achievable due to the required mechanical working movement of the device parts.
Mit Vorteil ist das Verfahren bei ÜbertragungsVorgängen anwendbar, bei welchen fließfähige Medien mittels taktweise definierter Dosierung aus einem Vorratsbehälter auf ein Substrat als Träger übertragen werden sollen.The method can advantageously be used in transfer processes in which flowable media are to be transferred from a storage container to a substrate as a carrier by means of cyclically defined metering.
Ein mit Hilfe der Erfindung mögliches, sehr zweckmäßiges Druckverfahren ist rein schematisch im Stammbaum der Figur 6 dargestellt. Dabei wird ein Träger 20 mit einem Medium bedruckt, das aus einem nicht gezeigten Speicher mit einer ebenfalls nicht gezeigten geometrischen Druckfördervorrich¬ tung durch die Druckleitung 15 über den Sammelraum 7 in der in den Figuren 1 bis 5 gezeigten Art in die Druckform 1 der Druckplatte 2 eingebracht wird. Der Träger 20 wird dabei in Form eines Bandes unter Spannung aus einer Vorratsrolle 21 abgewickelt und intermittierend in geringem Abstand über die Druckform 1 geführt und dabei während der Phase der Befüllung der Druckform 1 jeweils um einen Rasterabstand gefördert. Unterhalb des Tampons 22, der beim Fördervorgang angehoben ist, wird das Band 20 sodann für die Dauer eines Druckvorganges angehalten und durch den Tampon 22 gegen die Druckform unter Druckeinwirkung zur Anlage gebracht. Dabei wird dann das Druckbild von der Druckform 1 auf den Träger 20 übertragen bzw. aufgedruckt. Unmittelbar danach wird der Tampon 22 angehoben, das Band von der Druckform 1 abgehoben und um einen Rasterabstand weitergefördert. Währenddessen wird die Druckform 1 für den folgenden Druckvorgang mit Druckmedium von unten her befüllt. Das Abheben des bedruck- ten Bandes 20 von der Druckform 1 kann beispielsweise mit Hilfe von Blasdüsen 23 erfolgen. Nunmehr befinden sich auf der Unterseite des gespannten Bandes Druckbilder 24, die getrocknet werden müssen. Zu diesem Zweck kann sich im Ab¬ stand von der Druckstation eine Trockenstation 25 befinden, in welcher mit bekannten Mitteln, beispielsweise in einem Heißlufttunnel, das frische Druckbild getrocknet wird. An¬ schließend kann der bedruckte Träger auf eine Auf ickel- trommel 26 aufgewickelt werden. Anstelle der Aufwickeltrom- mel können aber auch Vorrichtungen zur Konfektionierung vorgesehen sein.A very useful printing method that is possible with the aid of the invention is shown purely schematically in the family tree of FIG. 6. In this case, a carrier 20 is printed with a medium which, from a memory (not shown) with a geometric pressure delivery device (also not shown) through the pressure line 15 via the collecting space 7 in the manner shown in FIGS. 1 to 5, into the printing form 1 of the printing plate 2 is introduced. The carrier 20 is unwound in the form of a tape under tension from a supply roll 21 and is intermittently guided at a short distance over the printing forme 1 and thereby conveyed by one grid spacing during the phase of filling the printing forme 1. Below the tampon 22, which is raised during the conveying process, the belt 20 is then stopped for the duration of a printing process and brought into contact with the printing form under pressure by the tampon 22. The print image is then transferred or printed from the printing form 1 onto the carrier 20. Immediately thereafter, the tampon 22 is raised, the band is lifted off the printing form 1 and conveyed on by a grid spacing. Meanwhile, the printing form 1 is filled with printing medium from below for the following printing process. Taking off the printed ten tape 20 from the printing form 1 can be done for example with the aid of blowing nozzles 23. Now there are printed images 24 on the underside of the tensioned belt which have to be dried. For this purpose, a drying station 25 can be located at a distance from the printing station, in which the fresh print image is dried using known means, for example in a hot air tunnel. The printed carrier can then be wound onto a nickel drum 26. Instead of the winding drum, however, devices for the assembly can also be provided.
Die Erfindung ist nicht ausschließlich auf die in den Bei¬ spielen gezeigten Ausführungsformen begrenzt, es können beispielsweise Ausgestaltungen der Vorrichtungen zum Viel¬ fachdruck vorgesehen sein, Druckformen können durch Ätzung, Gravierung, Elektroerosion hergestellt sein und die Zufuhr¬ kanäle am Grunde einer Druckform 1 können in beliebiger Verteilung angeordnet sein. Mit dem neuen Druckverfahren nach der Erfindung eröffnen sich neue und wirtschaftliche Wege zur exakten Dosierung insbesondere von Arzneimittel- Wirkstoffen mit äußerst wirtschaftlichen Mitteln und Ar¬ beitsverfahren. Insofern stellt die Erfindung eine optimale Lösung der eingangs gestellten Aufgabe dar. The invention is not limited exclusively to the embodiments shown in the examples; for example, configurations of the devices for multiple printing can be provided, printing forms can be produced by etching, engraving, electroerosion and the feed channels at the base of a printing form 1 be arranged in any distribution. The new printing method according to the invention opens up new and economical ways for exact dosing, in particular of active pharmaceutical ingredients, with extremely economical means and working methods. In this respect, the invention represents an optimal solution to the problem stated at the outset.

Claims

P A T E N T A N S P R Ü C H E PATENT CLAIMS
1. Tampondruckverfahren unter Verwendung einer an ihrer Oberfläche wenigstens eine Druckform aufweisenden Druckplatte, wobei die Druckform jeweils in zeitlichen Intervallen mit Druckmedium befüllt und das Druckmedium anschließend auf einen Träger übertragen wird, dadurch gekennzeichnet, daß die Befüllung der Druckform mit Druckmedium von der Bodenseite der Druckform her unter Verwendung von die Druckform mit einem Speicher des Druckmediums verbindenden Zufuhrkanälen vorgenommen wird.1. Pad printing process using a printing plate having at least one printing form on its surface, the printing form being filled with printing medium at intervals and the printing medium subsequently being transferred to a carrier, characterized in that the filling of the printing form with printing medium from the bottom side of the printing form forth using feed channels connecting the printing form to a memory of the printing medium.
2. Tampondruckverfahren nach Anspruch 1, dadurch gekenn¬ zeichnet, daß die Kanäle zumindest im Bereich ihres Austritts am Boden der Druckform runde, eckige, z.B. Schlitz- oder siebförmige Querschnittsformen aufweisen.2. Pad printing method according to claim 1, characterized gekenn¬ characterized in that the channels at least in the region of their exit at the bottom of the printing form round, angular, e.g. Have slit or sieve-shaped cross-sectional shapes.
3. Tampondruckverfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Förderung des Druckmediums durch die Kanäle durch Einwirkenlassen von intermittie¬ rendem Druck auf das Druckmedium vorgenommen wird.3. Pad printing process according to claim 1 or 2, characterized in that the promotion of the printing medium through the channels is carried out by the action of intermittent pressure on the printing medium.
4. Tampondruckverfahren nach einem oder mehreren der An¬ sprüche 1 bis 3, dadurch gekennzeichnet, daß die Dosie¬ rung der in die Druckform einzutragenden Menge von Druckmedium durch die Länge der Phase des Förderungs- druckes und/oder die Höhe des Förderdruckes gesteuert wird.4. pad printing process according to one or more of claims 1 to 3, characterized in that the dosage of the amount of printing medium to be entered into the printing form is controlled by the length of the phase of the delivery pressure and / or the amount of the delivery pressure.
5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Befüllung der Druckform mittels einer Volumendo¬ siereinheit erfolgt. 5. The method according to claim 4, characterized in that the filling of the printing form takes place by means of a Volumendo¬ siereinheit.
6. Tεunpondruckverfahren nach einem oder mehreren der An¬ sprüche 1 bis 5, dadurch gekennzeichnet, daß das Druck¬ medium vor Eintritt in die Zufuhrkanäle zur Druckver¬ gleichmäßigung durch einen Sammelraum hindurchgeführt und aus diesem in die einzelnen Zufuhrkanäle eingeführt wird.6. Tεunponddruckverfahren according to one or more of claims 1 to 5, characterized in that the Druck¬ medium before entering the feed channels for pressure equalization through a collecting space and is introduced from this into the individual feed channels.
7. Tampondruckverfahren nach einem oder mehreren der An¬ sprüche 1 bis 6, dadurch gekennzeichnet, daß zum Aufbau unterschiedlicher Strömungswiderstände beim Durchtritt von Druckmedium durch die einzelnen Kanäle diese mit unterschiedlichen Strömungsguerschnitten und/oder Län¬ genabmessungen ausgebildet werden.7. pad printing process according to one or more of claims 1 to 6, characterized in that to build up different flow resistances when pressure medium passes through the individual channels, these are formed with different flow cross sections and / or length dimensions.
8. Tampondruckverf hren nach einem oder mehreren der An¬ sprüche 1 bis 7, dadurch gekennzeichnet, daß die Befül¬ lung der Druckform mit Druckmedium bei von Raumtempera¬ tur abweichender und vorzugsweise erhöhter Temperatur vorgenommen wird.8. Pad printing method according to one or more of claims 1 to 7, characterized in that the filling of the printing form with printing medium is carried out at a temperature which differs from room temperature and is preferably elevated.
9. Tampondruckverf hren nach einem oder mehreren der An¬ sprüche 1 bis 8, wobei die Druckform in zeitlich wie¬ derholten Intervallen einer Folge von Arbeitszyklen jeweils mit Druckmedium befüllt wird, dadurch gekenn¬ zeichnet, daß der Träger in Form eines Bandes unter Spannung intermittierend und in geringem Abstand über die Druckform geführt und dabei während der Phase der Befüllung der Druckform jeweils um einen Rasterabstand gefördert und sodann für die Dauer eines Druckvorganges angehalten und durch einen Tampon gegen die Druckform zur Anlage gebracht wird, worauf der Tampon angehoben, das Band von der Druckform abgehoben, um einen Raster¬ abstand weitergefördert und währenddessen die Druckform für den folgenden Druckvorgang mit Druckmedium von un¬ ten her befüllt wird. 9. Pad printing method according to one or more of claims 1 to 8, the printing form being filled with printing medium at repeated intervals of a sequence of working cycles, characterized in that the carrier in the form of a tape is intermittent under tension and passed at a short distance over the printing form and thereby each during the phase of filling the printing form by a grid spacing and then stopped for the duration of a printing process and brought against the printing form by a tampon, whereupon the tampon raised, the band of the printing form is lifted off, conveyed further by a grid spacing and meanwhile the printing form is filled with printing medium from below for the subsequent printing process.
EP94905023A 1993-01-29 1994-01-10 Printing process using stamp Expired - Lifetime EP0681526B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4302445A DE4302445A1 (en) 1993-01-29 1993-01-29 Pad printing process
DE4302445 1993-01-29
PCT/EP1994/000051 WO1994016894A1 (en) 1993-01-29 1994-01-10 Printing process using stamp

Publications (2)

Publication Number Publication Date
EP0681526A1 true EP0681526A1 (en) 1995-11-15
EP0681526B1 EP0681526B1 (en) 1996-10-09

Family

ID=6479170

Family Applications (1)

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EP94905023A Expired - Lifetime EP0681526B1 (en) 1993-01-29 1994-01-10 Printing process using stamp

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US (1) US5802972A (en)
EP (1) EP0681526B1 (en)
JP (1) JP3544662B2 (en)
KR (1) KR100288312B1 (en)
AT (1) ATE143864T1 (en)
AU (1) AU683639B2 (en)
CA (1) CA2155033C (en)
CZ (1) CZ175495A3 (en)
DE (2) DE4302445A1 (en)
DK (1) DK0681526T3 (en)
ES (1) ES2095743T3 (en)
FI (1) FI107901B (en)
GR (1) GR3021860T3 (en)
HR (1) HRP940031B1 (en)
HU (1) HU218065B (en)
IL (1) IL108236A (en)
MY (1) MY131590A (en)
NO (1) NO305737B1 (en)
NZ (1) NZ259856A (en)
PL (1) PL173000B1 (en)
SI (1) SI9400047A (en)
SK (1) SK90895A3 (en)
WO (1) WO1994016894A1 (en)
YU (1) YU48615B (en)
ZA (1) ZA94494B (en)

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AU683639B2 (en) 1997-11-20
ATE143864T1 (en) 1996-10-15
NZ259856A (en) 1997-03-24
KR100288312B1 (en) 2001-05-02
MY131590A (en) 2007-08-30
HU218065B (en) 2000-05-28
ZA94494B (en) 1994-09-01
YU3894A (en) 1997-03-07
NO952992D0 (en) 1995-07-28
DE59400826D1 (en) 1996-11-14
SI9400047A (en) 1994-09-30
FI953571A (en) 1995-07-26
US5802972A (en) 1998-09-08
EP0681526B1 (en) 1996-10-09
CA2155033A1 (en) 1994-08-04
JPH08506063A (en) 1996-07-02
CA2155033C (en) 2005-10-18
IL108236A0 (en) 1994-04-12
YU48615B (en) 1999-03-04
NO305737B1 (en) 1999-07-19
JP3544662B2 (en) 2004-07-21
FI107901B (en) 2001-10-31
PL173000B1 (en) 1998-01-30
NO952992L (en) 1995-09-28
DE4302445A1 (en) 1994-08-11
HRP940031A2 (en) 1996-06-30
WO1994016894A1 (en) 1994-08-04
SK90895A3 (en) 1995-12-06
PL309601A1 (en) 1995-10-30
KR960700154A (en) 1996-01-19
HU9501907D0 (en) 1995-08-28
HUT73519A (en) 1996-08-28
IL108236A (en) 1996-05-14
HRP940031B1 (en) 1998-12-31
FI953571A0 (en) 1995-07-26
GR3021860T3 (en) 1997-03-31
DK0681526T3 (en) 1997-03-24
ES2095743T3 (en) 1997-02-16
CZ175495A3 (en) 1996-04-17
AU5881694A (en) 1994-08-15

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