EP0201627A2 - Marking process for plastics - Google Patents
Marking process for plastics Download PDFInfo
- Publication number
- EP0201627A2 EP0201627A2 EP85112773A EP85112773A EP0201627A2 EP 0201627 A2 EP0201627 A2 EP 0201627A2 EP 85112773 A EP85112773 A EP 85112773A EP 85112773 A EP85112773 A EP 85112773A EP 0201627 A2 EP0201627 A2 EP 0201627A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- plastic
- dye
- laser beam
- sublimation dye
- diffused
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/26—Printing on other surfaces than ordinary paper
- B41M1/30—Printing on other surfaces than ordinary paper on organic plastics, horn or similar materials
Definitions
- the invention relates to a method for marking of plastics, by means of a dye bathträ- g ers is transferred to a plastic.
- legible, easily readable inscriptions are often to be attached, which differ from case to case in the composition and size of the characters. This applies in particular to the keys of input units, e.g. Typewriters.
- Transfer printing in which a carrier made of paper provided with a dye is pressed against the plastic by means of a hot pressure stamp with slight pressure, the dye being transferred to the surface.
- the disadvantage of this method is that the action of the energy of the laser beam leads to irreversible reactions in the plastic, which are usually associated with significant changes in color.
- the color change can only be set to a limited extent: this means that only a light font on a dark background or a dark font on a light background is possible.
- the invention has for its object to provide an economical, flexible process for the inscription of plastics can be produced with sharp contours, abrasion-resistant character in any desired color and size on belie- bi g em background only by drawing or electronic constraint, wherein a Destruction of the plastic must not occur.
- the object is achieved in that the subtimation dye is diffused via the gaseous phase into the respectively heated surface of the plastic via at least one laser beam which can be controlled according to the characters as a heat carrier.
- laser beams with a wavelength ⁇ of 100-1500 nm, in particular of 1000-1500 nm have proven successful.
- the power density should be 114-220 J / cm 2 , in particular 124-150 J / cm 2 , with an exposure time of 0.2-0.8 s / mm 2 , in particular 0.5-0.7 s / mm 2 .
- the amount of diffusion depends on the current multiplied by the number of modes through speed.
- the softening temperature of the plastic should be at least 30 ° C above the sublimation temperature of the dye.
- the sublimation dye applied directly to the surface is diffused.
- the sublimation dye is guided past the surface of the plastic on a carrier material.
- the sublimation dye is brought to the place where the laser beam hits.
- carrier material which can consist of paper, tissue or foil.
- the sublimation dye is brought to the place where the laser beam hits.
- a device with a step-wise continuous tape is advantageous for this, which is wound up from one spool before use and rewound on the next spool after signing.
- the path opposite to the direction of propagation of the laser beam is blocked for the gaseous dye.
- the gaseous phase of the sublimation dye can only migrate in the direction of the plastic to be labeled.
- the sublimation dye is pressed onto the plastic directly over the carrier material.
- the carrier material is pressed against the plastic via a transparent device which allows the laser beam to pass through almost unhindered.
- a transparent PU body at wavelengths in the range of 1000 - 1500 nm, in which, for example, the Nd-YAG solid-state laser emits has practically no change when irradiating with a laser beam during the usual exposure time, it is possible to do this using fluid cushions Press the carrier material cleanly, the fluid being able to serve as an energy carrier, for example for preheating the dye and thus for faster entry into the gaseous phase.
- the sublimation dye is passed in the gaseous phase to the area where the laser beam strikes at high speed with simultaneous compression.
- An intensive effect can be achieved by adding dye in the gaseous phase at high speed and compression by funnel-shaped formation of the gas channel, the excess dye being sucked off again and again in order to be added to the cycle again.
- the sublimation dye is diffused into thermoplastically processable, pourable or pressable plastics.
- the process can be advantageous, among other things, for materials such as acrylonitrile butadiene styrene (Novodur ) Cellulose acetate (Cellidor ) - polyamides (Durethan ) Polycarbonate (Makrolon ), Polyester and polybutylene terephthalate (Pocan ) or a mixture of the polymers mentioned and preferably (PC / ABS blend (Bayblend ) PC / PBTP blend (macro blend ) and polyurethane as well as silicone rubbers are used.
- PC / ABS blend Boyblend
- PC / PBTP blend macro blend
- silicone rubbers a mixture of the polymers mentioned and preferably
- thermoplastic materials can be processed.
- Thermal diffusion dyes and sublimation dyes are suitable as dyes.
- a transfer printing paper printed with Resiren T, blue area is positioned on a typewriter key made of Novodur PH-AT (ABS) and arranged under the laser optics of an Nd-YAG solid-state laser.
- a polyester film (Hostaphan RE 0.050 n) printed with black Resiren T, is positioned on a plastic housing made of Durethan BKV 30 and arranged under the laser optics of a Nd-YAG solid-state laser. A focused laser beam is generated ( ⁇ 1.06 ⁇ m) and (in a circle) guided over the film. After removing the film, the dye in the irradiated zone has penetrated the plastic.
Landscapes
- Thermal Transfer Or Thermal Recording In General (AREA)
- Printing Methods (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Beschriften von Kunststoffen, indem ein Farbstoff mittels eines Wärmeträ- gers auf einen Kunststoff übertragen wird.The invention relates to a method for marking of plastics, by means of a dye Wärmeträ- g ers is transferred to a plastic.
Bei Meß-, Regel-, Schalt- und Bedienungsgeräten sind oft gut lesbare, abgriffeste Beschriftungen anzubringen, die in der Zusammensetzung und Größe der Zeichen von Fall zu Fall verschieden sind. Dieses gilt insbesondere für die Tasten von Eingabeeinheiten, wie z.B. Schreibmaschinen.In the case of measuring, control, switching and operating devices, legible, easily readable inscriptions are often to be attached, which differ from case to case in the composition and size of the characters. This applies in particular to the keys of input units, e.g. Typewriters.
Bekannt ist der Transferdruck, bei dem ein mit Farbstoff versehener Träger aus Papier mittels eines heißen Druckstempels bei leichtem Anpreßdruck gegen den Kunststoff gedrückt wird, wobei der Farbstoff auf die Oberfläche übertragen wird.Transfer printing is known, in which a carrier made of paper provided with a dye is pressed against the plastic by means of a hot pressure stamp with slight pressure, the dye being transferred to the surface.
Der Nachteil dieses Verfahrens besteht darin, daß für jedes Zeichen besondere Stempel notwendig sind, so daß das Verfahren unflexibel hinsichtlich Schriften und teuer bei geringeren Stückzahlen ist. Auch ist bei einem solchen Stempel die Haltung der Temperatur schwierig, wobei diese Schwankungen zu Qualitätseinbußen hinsichtlich Farbstoffeintragung und Oberfläche des Kunststoffes führen kann.The disadvantage of this method is that special stamps are required for each character, so that the method is inflexible with regard to fonts and is expensive for smaller quantities. With such a stamp, it is also difficult to maintain the temperature Fluctuations can lead to a loss of quality in terms of dye entry and surface of the plastic.
Bekannt ist ferner das Beschriften eines Kunststoffteiles mit einem Laserstrahl, wobei dieser entsprechend dem Schriftzug geführt wird.It is also known to label a plastic part with a laser beam, which is guided in accordance with the lettering.
Der Nachteil dieses Verfahrens besteht darin, daß es durch die Einwirkung der Energie des Laserstrahles zu irreversiblen Umsetzungen im Kunststoff kommt, die meist mit signifikanten Farbänderungen verbunden sind. Die Farbänderung ist nur bedingt einstellbar: das heißt es ist nur eine helle Schrift auf dunklem Untergrund bzw. eine dunkle Schrift auf hellem Hintergrund möglich.The disadvantage of this method is that the action of the energy of the laser beam leads to irreversible reactions in the plastic, which are usually associated with significant changes in color. The color change can only be set to a limited extent: this means that only a light font on a dark background or a dark font on a light background is possible.
Der Erfindung liegt die Aufgabe zugrunde, ein wirtschaftliches, flexibles Verfahren zur Beschriftung von Kunststoffen zu finden, mit dem konturenscharfe, abriebfeste Zeichen in jeder gewünschten Farbe und Größe auf belie- bigem Hintergrund nur durch zeichnerische oder elektronische Vorgabe erzeugt werden können, wobei eine Zerstörung des Kunststoffes nicht eintreten darf.The invention has for its object to provide an economical, flexible process for the inscription of plastics can be produced with sharp contours, abrasion-resistant character in any desired color and size on belie- bi g em background only by drawing or electronic constraint, wherein a Destruction of the plastic must not occur.
Die Aufgabe wird erfindungsgemäß dadurch aelöst, daß über mindestens einen entsprechend den Schriftzeichen steuerbaren Laserstrahl als Wärmeträger der Subtimationsfarbstoff über die gasförmige Phase in die jeweils punktuell erhitzte Oberfläche des Kunststoffes eindiffundiert wird.The object is achieved in that the subtimation dye is diffused via the gaseous phase into the respectively heated surface of the plastic via at least one laser beam which can be controlled according to the characters as a heat carrier.
Es wurde überraschend gefunden, daß mittels einer kurzwelligen Strahlung, insbesondere eines Laserstrahles, der Sublimationsfarbstoff trotz Phasenwechsel ohne wesentliche Veränderung der Farbe in die entsprechend dem ge-wünschten Zeichen nacheinander erhitzte Oberfläche des Kunststoffes infolge des Partialdruckgefälles so tief eindiffundiert werden kann, daß ein konturenscharfes, abriebfestes, gut lesbares, farbiges Zeichen entsteht, wobei die Farbe je nach Bedeutung (z.B. signalrot) und Untergrund beliebig gewählt werden kann. Wegen der kurzen, gezielten, gleichmäßigen Einstrahlunaen und der berührungslosen Energie-Übertragung tritt keine Materialschädi- gung auf. Ein weiterer Vorzug des erfindungsgemäßen Verfahrens ist die Flexibilität, da der Laserstrahl über Leitlinien (Zeichnungen) bzw. EDV-Programme gesteuert werden kann.It has been found, surprisingly, that can be diffused so deeply by means of a short-wave radiation, in particular a laser beam, the sublimation dye in spite P hare exchange without substantial change in color in the corresponding to the g e-desired characters one by one heated surface of the plastic due to the partial pressure gradient that a Sharp contours, abrasion-resistant, easy-to-read, colored characters are created, whereby the color can be chosen according to the meaning (eg signal red) and background. Because of the short, targeted, even Einstrahlunaen and contactless energy transfer occurs no Materialschädi- g clothes on. A further advantage of the method according to the invention is flexibility, since the laser beam can be controlled via guidelines (drawings) or computer programs.
Für-eine farbige Bedruckung haben sich Laserstrahlen mit einer Wellenlänge λ von 100 - 1500 nm, insbesondere von 1000 - 1500 nm bewährt. Die Leistungsdichte sollte 114 - 220 J/cm2, insbesondere 124 - 150 J/cm2, bei einer Einwirkzeit von 0,2 - 0,8 s/mm2, insbesondere 0,5 - 0,7 s/mm2, betragen. Vorteilhafte Ergebnisse sind mit einem Nd-YAG-Festkörperlaser (λ = 1,06 µm) mit einem Brennfleckdurchmesser zwischen 0,05 - 0,1 mm Durchmesser bei einer Wiederholfrequenz 0,5 - 15 KHz unter einer Stromstärke von 10-25 A und einer Geschwindigkeit von 5 - 50 mm/s, insbesondere von 5-15 mm/s, zu erzielen. Die Diffusionsmenge hängt von Stromstärke mal Modenzahl durch Geschwindigkeit ab. Die Erweichungstemperatur des Kunststoffes sollte dabei mindestens 30° C über der Sublimationstemperatur des Farbstoffes liegen.For colored printing, laser beams with a wavelength λ of 100-1500 nm, in particular of 1000-1500 nm, have proven successful. The power density should be 114-220 J / cm 2 , in particular 124-150 J / cm 2 , with an exposure time of 0.2-0.8 s / mm 2 , in particular 0.5-0.7 s / mm 2 . Advantageous results are with an Nd-YAG solid-state laser (λ = 1.06 µm) with a focal spot diameter between 0.05 - 0.1 mm in diameter at a repetition frequency of 0.5 - 15 KHz under a current of 10-25 A and one To achieve speeds of 5 - 50 mm / s, especially 5-15 mm / s. The amount of diffusion depends on the current multiplied by the number of modes through speed. The softening temperature of the plastic should be at least 30 ° C above the sublimation temperature of the dye.
In einer besonderen Durchführung des Verfahrens wird der direkt auf die Oberfläche flächig aufgebrachte Sublimationsfarbstoff eindiffundiert.In a special implementation of the method, the sublimation dye applied directly to the surface is diffused.
Durch flächiges Aufbringen eines Farbstoffes durch Schütten, Sprühen, Streichen oder Drucken ist es möglich, jedes Zeichen mit dem Laserstrahl entsprechend dem vorgegebenen Verlauf abzufahren. Die nicht eindiffundierten Reste an Farbstoffen werden anschließend entfernt.By applying a dye across the board by pouring, spraying, brushing or printing, it is possible to scan each character with the laser beam in accordance with the specified course. The undiffused dye residues are then removed.
In einer anderen Durchführung des Verfahrens wird der Sublimationsfarbstoff auf einem Trägermaterial an der Oberfläche des Kunststoffes vorbeigeführt.In another implementation of the method, the sublimation dye is guided past the surface of the plastic on a carrier material.
Mit Hilfe von Trägermaterial, das aus Papier, Gewebe oder Folie bestehen kann, wird der Sublimationsfarbstoff an die Stelle herangeführt, wo der Laserstrahl auftrifft. Vorteilhaft ist hierfür eine Vorrichtung mit einem schrittweise durchlaufenden Band, welches vor der Benutzung von einer Spule ab-und nach dem Signieren auf der nächsten Spule wieder aufgewickelt wird.With the help of carrier material, which can consist of paper, tissue or foil, the sublimation dye is brought to the place where the laser beam hits. A device with a step-wise continuous tape is advantageous for this, which is wound up from one spool before use and rewound on the next spool after signing.
In einer vorteilhaften Durchführung des Verfahrens wird dem gasförmigen Farbstoff der Weg entgegengesetzt zur Ausbreitungsrichtung des Laserstrahles gesperrt.In an advantageous implementation of the method, the path opposite to the direction of propagation of the laser beam is blocked for the gaseous dye.
Durch eine gasundurchlässige Schicht, die gleichzeitig als Trägermaterial dienen kann, kann die gasförmige Phase des Sublimationsfarbstoffes nur in Richtung des zu beschriftenden Kunststoffes abwandern.Due to a gas-impermeable layer, which can also serve as a carrier material, the gaseous phase of the sublimation dye can only migrate in the direction of the plastic to be labeled.
In einer nützlichen Durchführung des Verfahrens wird der Sublimationsfarbstoff direkt über das Trägermaterial auf den Kunststoff gepreßt.In a useful implementation of the method, the sublimation dye is pressed onto the plastic directly over the carrier material.
Mittels einer mechanischen Spannvorrichtung oder durch Anlegen von Vakuum bei gasdichtem Trägermaterial werden sehr kurze Wege für das Eindiffundieren des Farbstoffes geschaffen.By means of a mechanical tensioning device or by applying a vacuum to the gas-tight carrier material, very short paths for the diffusion of the dye are created.
In einer bevorzugten Durchführung des Verfahrens wird das Trägermaterial über eine transparente Vorrichtung, die den Laserstrahl nahezu ungehindert durchläßt, gegen den Kunststoff gepreßt.In a preferred implementation of the method, the carrier material is pressed against the plastic via a transparent device which allows the laser beam to pass through almost unhindered.
Da beispielsweise ein transparenter PU-Körper bei Wellenlängen im Bereich 1000 - 1500 nm, in dem beispielsweise der Nd-YAG-Festkörper-Laser strahlt, bei der üblichen Einwirkzeit praktisch keine Veränderung beim Durchstrahlen mit einem Laserstrahl aufweist, ist es möglich, über Fluidkissen das Trägermaterial sauber anzudrücken, wobei das Fluid als Energieträger beispielsweise zur Vorwärmung des Farbstoffes und damit schnelleren Eintritts in die gasförmige Phase dienen kann.Since, for example, a transparent PU body at wavelengths in the range of 1000 - 1500 nm, in which, for example, the Nd-YAG solid-state laser emits, has practically no change when irradiating with a laser beam during the usual exposure time, it is possible to do this using fluid cushions Press the carrier material cleanly, the fluid being able to serve as an energy carrier, for example for preheating the dye and thus for faster entry into the gaseous phase.
In einer weiteren Durchführung des Verfahrens wird der Sublimationsfarbstoff in gasförmiger Phase an den Bereich, wo der Laserstrahl auftrifft, mit hoher Geschwindigkeit bei gleichzeitiger Verdichtung vorbeigeführt.In a further implementation of the method, the sublimation dye is passed in the gaseous phase to the area where the laser beam strikes at high speed with simultaneous compression.
Durch Zuführen von Farbstoff in gasförmiger Phase mit hoher Geschwindigkeit und Verdichtung durch trichterförmige Ausbildung des Gaskanals kann ein intensiver Effekt erzielt werden, wobei der überschüssige Farbstoff immer wieder sofort abgesaugt wird, um erneut dem Kreislauf zugesetzt zu werden.An intensive effect can be achieved by adding dye in the gaseous phase at high speed and compression by funnel-shaped formation of the gas channel, the excess dye being sucked off again and again in order to be added to the cycle again.
In einer Durchführung des Verfahrens wird der Sublimationsfarbstoff in thermoplastisch verarbeitbare, gießfähige oder preßbare Kunststoffe eindiffundiert.In one implementation of the method, the sublimation dye is diffused into thermoplastically processable, pourable or pressable plastics.
Das Verfahren kann unter anderem vorteilhaft bei Werkstoffen wie Acrylnitril-Butadien - Styrol (Novodur 
Als Farbstoffe sind Thermodiffusionsfarben und Sublimationsfarben (RESIREN T®) geeignet.Thermal diffusion dyes and sublimation dyes (RESIREN T®) are suitable as dyes.
Ein mit Resiren T, blau flächig bedrucktes Transfer-Druckpapier wird auf eine Schreibmaschinentaste aus Novodur PH-AT (ABS) positioniert und unter der Laser-Optik eines Nd-YAG-Festkörperlasers anaeordnet. Es wird ein fokussierter Laserstrahl erzeugt (λ = 1,06 µm und (in Kreisform)über das Papier geführt. Nach Entfernen des Papiers ist der Farbstoff in der bestrahlten Zone in den Kunststoff eingedrungen.A transfer printing paper printed with Resiren T, blue area is positioned on a typewriter key made of Novodur PH-AT (ABS) and arranged under the laser optics of an Nd-YAG solid-state laser. A focused laser beam is generated (λ = 1.06 µm and (in a circle) over the paper. After removing the paper, the dye in the irradiated zone has penetrated the plastic.
Eine mit Resiren T, rot flächig bedruckte Polyesterfolie (Hostaphan RE 0.050 mm) wird auf eine Schalterabdeckung aus Pocan B 1505 (PBTP) positioniert und unter der Laser-Optik eines Nd-YAG-Festkörperlasers angeordnet. Es wird ein fokussierter Laserstrahl erzeugt (λ = 1,06 µm) und (in Kreisform)über die Folie geführt. Nach Entfernen der Folie ist der Farbstoff in der bestrahlten Zone in den Kunststoff eingedrungen.A polyester film (Hostaphan RE 0.050 mm) printed with a red surface with Resiren T, is positioned on a switch cover made of Pocan B 1505 (PBTP) and arranged under the laser optics of an Nd-YAG solid-state laser. A focused laser beam is generated (λ = 1.06 µm) and (in a circular shape) guided over the film. After removing the film, the dye in the irradiated zone has penetrated the plastic.
Eine mit Resiren T, schwarz flächig bedruckte Polyesterfolie (Hostaphan RE 0,050 n) wird auf einem Kunststoffgehäuse aus Durethan BKV 30 positioniert und unter der Laser-Optik eines Nd-YAG-Festkörperlasers angeordnet. Es wird ein fokussierter Laserstrahl erzeugt (λ = 1,06µm) und (in Kreisform)über die Folie geführt. Nach Entfernen der Folie ist der Farbstoff in der bestrahlten Zone in den Kunststoff eingedrungen.A polyester film (Hostaphan RE 0.050 n) printed with black Resiren T, is positioned on a plastic housing made of Durethan BKV 30 and arranged under the laser optics of a Nd-YAG solid-state laser. A focused laser beam is generated (λ = 1.06µm) and (in a circle) guided over the film. After removing the film, the dye in the irradiated zone has penetrated the plastic.
Claims (8)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3517275 | 1985-05-14 | ||
| DE19853517275 DE3517275A1 (en) | 1985-05-14 | 1985-05-14 | METHOD FOR LABELING PLASTICS |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0201627A2 true EP0201627A2 (en) | 1986-11-20 |
| EP0201627A3 EP0201627A3 (en) | 1988-09-14 |
| EP0201627B1 EP0201627B1 (en) | 1991-12-11 |
Family
ID=6270655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP85112773A Expired - Lifetime EP0201627B1 (en) | 1985-05-14 | 1985-10-09 | Marking process for plastics |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0201627B1 (en) |
| JP (1) | JPS61261093A (en) |
| CA (1) | CA1245448A (en) |
| DE (2) | DE3517275A1 (en) |
| ES (1) | ES8704808A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0265139A2 (en) * | 1986-10-15 | 1988-04-27 | Polyplastics Co., Ltd. | Impregnation-printed moulded article |
| EP0605803A1 (en) * | 1992-12-12 | 1994-07-13 | Hoechst Aktiengesellschaft | Colour-marking of plastic surfaces by laser radiation |
| EP0924096A1 (en) * | 1997-12-18 | 1999-06-23 | Matsushita Electric Industrial Co., Ltd | Marking method using energy rays and marked molding |
| WO2005097514A1 (en) * | 2004-03-30 | 2005-10-20 | Merck Patent Gmbh | Sealing of plastic inscriptions |
| CN100496993C (en) * | 2004-03-30 | 2009-06-10 | 默克专利股份有限公司 | Method for the permanent abrasion-resistant colored inscription and/or marking of plastics and plastic obtained therefrom |
| EP2392471A1 (en) * | 2009-01-27 | 2011-12-07 | Shizuoka Prefecture | Laser marking method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3817625A1 (en) * | 1988-05-25 | 1989-11-30 | Agfa Gevaert Ag | METHOD AND DEVICE FOR PRODUCING A THERMOCOPY |
| DE4408927A1 (en) * | 1994-03-16 | 1995-09-21 | Licentia Gmbh | Method of applying designs onto objects via thermography |
| GB2341579B (en) | 1998-09-16 | 2003-04-16 | Agra Vadeko Inc | Apparatus and method of marking polymer-based laminates |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0027532A1 (en) * | 1979-09-12 | 1981-04-29 | Siemens Aktiengesellschaft | Process for producing plastics keyboard buttons provided with different characters |
| US4388387A (en) * | 1979-03-26 | 1983-06-14 | Fuji Photo Film Co., Ltd. | Process for forming color images |
| EP0119548A2 (en) * | 1983-03-21 | 1984-09-26 | Nortech Chemie GmbH & Co. KG | Process for printing on supports by the transfer process |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1433025A (en) * | 1972-06-29 | 1976-04-22 | Sublistatic Holding Sa | Reproducing a multi-coloured image |
| JPS50119660A (en) * | 1974-03-01 | 1975-09-19 | ||
| JPS5343538A (en) * | 1976-10-01 | 1978-04-19 | Fujitsu Ltd | Thermal sublimate ink ribbon |
| JPS55101489A (en) * | 1979-01-30 | 1980-08-02 | Fujitsu Ltd | Recording method by thermal transfer |
| JPS55124672A (en) * | 1979-03-22 | 1980-09-25 | Fujitsu Ltd | Printer |
| JPS55126479A (en) * | 1979-03-23 | 1980-09-30 | Fujitsu Ltd | Printing method |
| JPS5682293A (en) * | 1979-06-28 | 1981-07-04 | Suzuki Sogyo Kk | Printing method |
| JPS5646789A (en) * | 1979-09-25 | 1981-04-28 | Nec Corp | Laser recording ribbon |
-
1985
- 1985-05-14 DE DE19853517275 patent/DE3517275A1/en not_active Withdrawn
- 1985-10-09 DE DE8585112773T patent/DE3584892D1/en not_active Expired - Lifetime
- 1985-10-09 EP EP85112773A patent/EP0201627B1/en not_active Expired - Lifetime
- 1985-12-09 CA CA000497134A patent/CA1245448A/en not_active Expired
- 1985-12-23 JP JP60288055A patent/JPS61261093A/en active Granted
-
1986
- 1986-05-13 ES ES554916A patent/ES8704808A1/en not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4388387A (en) * | 1979-03-26 | 1983-06-14 | Fuji Photo Film Co., Ltd. | Process for forming color images |
| EP0027532A1 (en) * | 1979-09-12 | 1981-04-29 | Siemens Aktiengesellschaft | Process for producing plastics keyboard buttons provided with different characters |
| EP0119548A2 (en) * | 1983-03-21 | 1984-09-26 | Nortech Chemie GmbH & Co. KG | Process for printing on supports by the transfer process |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0265139A2 (en) * | 1986-10-15 | 1988-04-27 | Polyplastics Co., Ltd. | Impregnation-printed moulded article |
| EP0265139A3 (en) * | 1986-10-15 | 1989-10-18 | Polyplastics Co. Ltd. | Impregnation-printed moulded article |
| EP0605803A1 (en) * | 1992-12-12 | 1994-07-13 | Hoechst Aktiengesellschaft | Colour-marking of plastic surfaces by laser radiation |
| EP0924096A1 (en) * | 1997-12-18 | 1999-06-23 | Matsushita Electric Industrial Co., Ltd | Marking method using energy rays and marked molding |
| US6245397B1 (en) | 1997-12-18 | 2001-06-12 | Matsushita Electric Industrial Co., Ltd. | Marking method and marked molding |
| WO2005097514A1 (en) * | 2004-03-30 | 2005-10-20 | Merck Patent Gmbh | Sealing of plastic inscriptions |
| CN100496993C (en) * | 2004-03-30 | 2009-06-10 | 默克专利股份有限公司 | Method for the permanent abrasion-resistant colored inscription and/or marking of plastics and plastic obtained therefrom |
| US8343412B2 (en) | 2004-03-30 | 2013-01-01 | Merck Patent Gmbh | Sealing of inscriptions on plastics |
| EP2392471A1 (en) * | 2009-01-27 | 2011-12-07 | Shizuoka Prefecture | Laser marking method |
| EP2392471A4 (en) * | 2009-01-27 | 2014-04-09 | Shizuoka Prefecture | Laser marking method |
| US9415463B2 (en) | 2009-01-27 | 2016-08-16 | Shizuoka Prefecture | Laser marking method |
Also Published As
| Publication number | Publication date |
|---|---|
| ES8704808A1 (en) | 1987-04-16 |
| ES554916A0 (en) | 1987-04-16 |
| EP0201627A3 (en) | 1988-09-14 |
| DE3584892D1 (en) | 1992-01-23 |
| JPH0559838B2 (en) | 1993-09-01 |
| DE3517275A1 (en) | 1986-11-20 |
| CA1245448A (en) | 1988-11-29 |
| JPS61261093A (en) | 1986-11-19 |
| EP0201627B1 (en) | 1991-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0153693B1 (en) | Printing device | |
| DE4447428C2 (en) | Process for producing an image to be inserted into an identification card | |
| EP0027532B1 (en) | Process for producing plastics keyboard buttons provided with different characters | |
| EP1440133B1 (en) | Method for producing a laser-printable film | |
| DE69822417T2 (en) | Method of labeling using active radiation and labeled molding | |
| DE102005048870A1 (en) | Production of multicolored inscriptions or marks on label material e.g. for sign or label involves laser ablation downwards from top of material having substrate and 2 or more layers of different color, preferably plastics film laminate | |
| DE19702977A1 (en) | Laser inscription or decoration of transparent article | |
| EP0110220A2 (en) | Transfer printing process | |
| EP0201627A2 (en) | Marking process for plastics | |
| EP0071162B1 (en) | Forgery resistant sheet element of synthetic material and manufacturing process thereof | |
| DE1436656B2 (en) | PROCESS FOR GENERATING VISIBLY REMAINING CHARACTERS FROM RADIATION INFLUENCED COLOR PARTICLES | |
| DE19652253A1 (en) | Laser marking of labels on e.g. command and signal devices | |
| DE1471681A1 (en) | Stencil-forming sheet material arrangement | |
| DE4417343C2 (en) | ID card and process for its manufacture | |
| DE102005043221A1 (en) | self-adhesive tape | |
| DE19918473C2 (en) | Method and device for labeling a sheet-like adhesive system of a thin-walled polymer, in the form of a drug-containing patch, in particular a transdermal therapeutic system | |
| DE19604646A1 (en) | Printing plate and process for its manufacture | |
| AT397636B (en) | Thermally printable material | |
| DE19801589A1 (en) | Protection of security documents against forgery | |
| EP0605803A1 (en) | Colour-marking of plastic surfaces by laser radiation | |
| DE2419634A1 (en) | Thermo-optical mfr of colour images - by IR or UV radiation of sensitive substrate through e.g. a mask | |
| DE1771199A1 (en) | Warm pressure sheet for covering purposes | |
| DE4201766A1 (en) | METHOD FOR PRINTING AND PRINTING TEXTILE MATERIALS | |
| DE2018594A1 (en) | ||
| DE2854861A1 (en) | Falsification-proof identification method esp. for card - has inner printed plastic sheet thermally bonded to transparent case to form homogeneous unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19851009 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): BE DE FR GB IT NL SE |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): BE DE FR GB IT NL SE |
|
| 17Q | First examination report despatched |
Effective date: 19900215 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE DE FR GB IT NL SE |
|
| ET | Fr: translation filed | ||
| REF | Corresponds to: |
Ref document number: 3584892 Country of ref document: DE Date of ref document: 19920123 |
|
| ITF | It: translation for a ep patent filed |
Owner name: SOCIETA' ITALIANA BREVETTI S.P.A. |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
| PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
|
| 26 | Opposition filed |
Opponent name: GAO GESELLSCHAFT FUER AUTOMATION UND ORGANISATION Effective date: 19920910 Opponent name: HOECHST AKTIENGESELLSCHAFT ZENTRALE PATENTABTEILUN Effective date: 19920905 |
|
| NLR1 | Nl: opposition has been filed with the epo |
Opponent name: GAO GESELLSCHAFT FUER AUTOMATION UND ORGANISATION Opponent name: HOECHST AG |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19930913 Year of fee payment: 9 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19930916 Year of fee payment: 9 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19930929 Year of fee payment: 9 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19931014 Year of fee payment: 9 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 19931027 Year of fee payment: 9 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19931031 Year of fee payment: 9 |
|
| RDAG | Patent revoked |
Free format text: ORIGINAL CODE: 0009271 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: PATENT REVOKED |
|
| 27W | Patent revoked |
Effective date: 19940217 |
|
| GBPR | Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state |
Free format text: 940217 |
|
| NLR2 | Nl: decision of opposition | ||
| EUG | Se: european patent has lapsed |
Ref document number: 85112773.8 Effective date: 19940727 |
|
| APAH | Appeal reference modified |
Free format text: ORIGINAL CODE: EPIDOSCREFNO |