EP0201627B1 - Marking process for plastics - Google Patents
Marking process for plastics Download PDFInfo
- Publication number
- EP0201627B1 EP0201627B1 EP85112773A EP85112773A EP0201627B1 EP 0201627 B1 EP0201627 B1 EP 0201627B1 EP 85112773 A EP85112773 A EP 85112773A EP 85112773 A EP85112773 A EP 85112773A EP 0201627 B1 EP0201627 B1 EP 0201627B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plastic
- dye
- laser
- laser beam
- plastics
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229920003023 plastic Polymers 0.000 title claims description 26
- 239000004033 plastic Substances 0.000 title claims description 25
- 238000000034 method Methods 0.000 title claims description 12
- 239000012530 fluid Substances 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims 1
- 239000000975 dye Substances 0.000 description 18
- 238000000859 sublimation Methods 0.000 description 6
- 230000008022 sublimation Effects 0.000 description 6
- 239000012876 carrier material Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 3
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 3
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- 238000010023 transfer printing Methods 0.000 description 3
- 229920006055 Durethan® Polymers 0.000 description 2
- 229920001890 Novodur Polymers 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000007792 gaseous phase Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 229920013667 Cellidor Polymers 0.000 description 1
- 239000004425 Makrolon Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- SMEGJBVQLJJKKX-HOTMZDKISA-N [(2R,3S,4S,5R,6R)-5-acetyloxy-3,4,6-trihydroxyoxan-2-yl]methyl acetate Chemical compound CC(=O)OC[C@@H]1[C@H]([C@@H]([C@H]([C@@H](O1)O)OC(=O)C)O)O SMEGJBVQLJJKKX-HOTMZDKISA-N 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- -1 polybutylene terephthalate Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
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 labeling plastics, in that a dye is guided past a plastic surface and is diffused into the plastic surface by means of a laser beam.
- 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 and provided with a dye is pressed against the plastic by means of a hot pressure stamp with light 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 adjusted to a limited extent; that means it is only possible to use a light font on a dark background or a dark font on a light background
- a thermal transfer printing process using sublimable dyes is known from EP 0 119 548-A2, an auxiliary carrier coated with the dyes being treated with laser radiation which is sufficient to allow the dyes to at least partially penetrate into the plastic surface of a substrate.
- the invention has for its object to improve the laser sublimation printing process for the production of labeled plastic parts with a curved surface, in particular for the production of labeled plastic device buttons.
- the object is achieved in that the carrier material is pressed against the plastic via a transparent device which allows the laser beam to pass through almost unhindered. As a result, the sublimation dye is pressed directly onto the plastic over the carrier material.
- the power density should be 114-220 J / cm2, in particular 124-150 J / cm2, with an exposure time of 0.2-0.8 s / mm2, in particular 0.5-0.7 s / mm2.
- 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 is brought to the place where the laser beam hits.
- carrier material which can consist of paper, tissue or foil.
- the gaseous phase of the sublimation dye can only migrate in the direction of the plastic to be labeled.
- the process can be advantageous, inter alia, 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 (Makroblend ®) as well as polyurethane and silicone rubbers are used.
- PC / ABS blend Boyblend ®
- PC / PBTP blend Mokroblend ®
- polyurethane and silicone rubbers are used.
- thermoplastic materials can be processed.
- Thermal diffusion dyes and sublimation dyes are suitable as dyes.
- a transfer printing paper printed with blue Resiren T is positioned on a typewriter key made of Novodur PH-AT (ABS) and arranged under the laser optics of a Nd-YAG solid-state laser.
- a polyester film (Hostaphan RE 0.050 ⁇ ) 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 circular shape) guided over the film. After removing the film, the dye in the irradiated zone penetrated the plastic.
Landscapes
- Thermal Transfer Or Thermal Recording In General (AREA)
- Printing Methods (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
Description
Die Erfindung betrifft ein Verfahren zum Beschriften von Kunststoffen, indem ein Farbstoff an einer Kunststoffoberfläche vorbeigeführt und mittels eines Laserstrahls in die Kunststoffoberfläche eindiffundiert wird.The invention relates to a method for labeling plastics, in that a dye is guided past a plastic surface and is diffused into the plastic surface by means of a laser beam.
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 and provided with a dye is pressed against the plastic by means of a hot pressure stamp with light 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 adjusted to a limited extent; that means it is only possible to use a light font on a dark background or a dark font on a light background
Aus EP 0 119 548-A2 ist ein Thermotransferdruckverfahren unter Verwendung von sublimierbaren Farbstoffen bekannt, wobei ein mit den Farbstoffen belegter Hilfsträger mit Laserstrahlung behandelt wird, die ausreicht, um die Farbstoffe wenigstens teilweise in die Kunststoffoberfläche eines Substrates eindringen zu lassen.A thermal transfer printing process using sublimable dyes is known from EP 0 119 548-A2, an auxiliary carrier coated with the dyes being treated with laser radiation which is sufficient to allow the dyes to at least partially penetrate into the plastic surface of a substrate.
Der Erfindung liegt the Aufgabe zugrunde, das Lasersublimationsdruckverfahren für die Herstellung von beschrifteten Kunststoffteilen mit gewölbter Oberfläche, insbesondere für die Herstellung von beschrifteten Kunststoffgerätetasten zu verbessern.The invention has for its object to improve the laser sublimation printing process for the production of labeled plastic parts with a curved surface, in particular for the production of labeled plastic device buttons.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Trägermaterial über eine transparente Vorrichtung, die den Laserstrahl nahezu ungehindert durchläßt, gegen den Kunststoff gepreßt wird. Dadurch wird der Sublimationsfarbstoff direkt über das Trägermaterial auf den Kunststoff gepreßt.The object is achieved in that the carrier material is pressed against the plastic via a transparent device which allows the laser beam to pass through almost unhindered. As a result, the sublimation dye is pressed directly onto the plastic over the carrier material.
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.Laser beams with a wavelength λ of 100 - 1500 nm, in particular 1000 - 1500 nm, have proven themselves for colored printing. The power density should be 114-220 J / cm², in particular 124-150 J / cm², with an exposure time of 0.2-0.8 s / mm², in particular 0.5-0.7 s / mm². 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, in particular 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.
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 tape is taken off a reel before use and rewound on the next reel after signing.
Durch eine gasundurchlässige Schicht, die gleichzeitig als Trägermaterial dienen kann, kann die gasförmige Phase des Sublimationsfarbstoffes nur in Richung 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.
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 1000 - 1500 nm, in which, for example, the Nd-YAG solid-state laser emits, has practically no change in the irradiation 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.
Das Verfahren kann unter anderem vorteilhaft bei Werkstoffen wie Acrylnitril-Butadien - Styrol (Novodur ®) Celluloseacetat (Cellidor ®) - Polyamide (Durethan ®) Polycarbonat (Makrolon ®), Polyester sowie Polybutylenterephthalat (Pocan ®) oder einer Mischung der genannten Polymere sowie vorzugsweise (PC/ABS-Blend (Bayblend ®) PC/PBTP-Blend (Makroblend ®) sowie Polyurethan als auch Silikonkautschuken eingesetzt werden. Insbesondere sind thermoplastische Werkstoffe verarbeitbar.The process can be advantageous, inter alia, 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 (Makroblend ®) as well as polyurethane and silicone rubbers are used. In particular, thermoplastic materials can be processed.
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 angeordnet. 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 blue Resiren T, is positioned on a typewriter key made of Novodur PH-AT (ABS) and arranged under the laser optics of a Nd-YAG solid-state laser. A focused laser beam is generated (λ = 1.06 µm) and (in a circular shape) guided over the paper. After removing the paper, the dye in the irradiated zone 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 placed 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 penetrated the plastic.
Eine mit Resiren T, schwarz flächig bedruckte Polyesterfolie (Hostaphan RE 0,050 π) 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 = 1,06 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 π) 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 = 1.06 µm) and (in a circular shape) guided over the film. After removing the film, the dye in the irradiated zone penetrated the plastic.
Claims (4)
- A process for lettering plastics in which a dye on a support is moved past a plastic surface and is diffused into the plastic surface by means of a laser jet, characterized in that the support material is pressed against the plastic by a transparent device which allows the laser beam to pass through substantially unhindered.
- A process as claimed in claim 1, characterized in that a plastic pad fillable with fluid is used as the transparent plastic pressing device.
- A process as claimed in claims 1 and 2, characterized in that the fluid is used to preheat the dye.
- A process as claimed in claims 1 to 3, characterized in that polyurethane is used as the plastic.
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 EP0201627A2 (en) | 1986-11-20 |
| EP0201627A3 EP0201627A3 (en) | 1988-09-14 |
| EP0201627B1 true 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) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6398482A (en) * | 1986-10-15 | 1988-04-28 | Polyplastics Co | Impregnation-printed molded product |
| DE3817625A1 (en) * | 1988-05-25 | 1989-11-30 | Agfa Gevaert Ag | METHOD AND DEVICE FOR PRODUCING A THERMOCOPY |
| EP0605803A1 (en) * | 1992-12-12 | 1994-07-13 | Hoechst Aktiengesellschaft | Colour-marking of plastic surfaces by laser radiation |
| DE4408927A1 (en) * | 1994-03-16 | 1995-09-21 | Licentia Gmbh | Method of applying designs onto objects via thermography |
| JPH11180099A (en) | 1997-12-18 | 1999-07-06 | Matsushita Electric Ind Co Ltd | Method for marking and resin molding with mark |
| GB2341579B (en) | 1998-09-16 | 2003-04-16 | Agra Vadeko Inc | Apparatus and method of marking polymer-based laminates |
| DE102004016037A1 (en) * | 2004-03-30 | 2005-11-03 | Merck Patent Gmbh | Method for the permanent abrasion-resistant colored inscription and/or marking of plastics comprises preventing bleeding and/or blooming of the dye and/or absorber in the plastic during sealing of inscribed sites with a transparent polymer |
| BRPI0509290B8 (en) | 2004-03-30 | 2013-02-19 | process for inscription and / or marking of colored abrasion resistant and permanent plastics, and plastics. | |
| JP5548886B2 (en) * | 2009-01-27 | 2014-07-16 | 静岡県 | Laser marking method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 (10)
| 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 |
| JPS55126487A (en) * | 1979-03-26 | 1980-09-30 | Fuji Photo Film Co Ltd | Colored-picture forming method |
| JPS5682293A (en) * | 1979-06-28 | 1981-07-04 | Suzuki Sogyo Kk | Printing method |
| DE2936926C2 (en) * | 1979-09-12 | 1982-11-25 | Siemens AG, 1000 Berlin und 8000 München | Process for the production of similar plastic parts provided with different characters, in particular plastic device buttons, by injection molding |
| 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0119548A2 (en) * | 1983-03-21 | 1984-09-26 | Nortech Chemie GmbH & Co. KG | Process for printing on supports by the transfer process |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0201627A2 (en) | 1986-11-20 |
| EP0201627A3 (en) | 1988-09-14 |
| ES554916A0 (en) | 1987-04-16 |
| JPS61261093A (en) | 1986-11-19 |
| DE3584892D1 (en) | 1992-01-23 |
| ES8704808A1 (en) | 1987-04-16 |
| DE3517275A1 (en) | 1986-11-20 |
| CA1245448A (en) | 1988-11-29 |
| JPH0559838B2 (en) | 1993-09-01 |
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