EP0420613A2
Expired / Lapsed
EP
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Data-written medium
Assignee: Artience Co Ltd
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Filing: 1990-09-26
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Granted: —
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Expires: 2010-09-26
Abstract
Abstract A data-written medium the data of which are readable with a light source having a main wavelength of 600 to 700 nm, the medium comprising a substrate and an ink layer encoding the data and containing not more than 0.1 g/m² of a chromatic color dyestuff absorbing substantially in the wavelength region of 600 to 700 nm and at least one other dyestuff.
Inventors
- 👤 Koji C/O Toyo Ink Manufact. Co. Ltd. Hanada
- 👤 Makiko C/O Toyo Ink Manufact. Co. Ltd. Hamuro
- 👤 Takeshi Toyo Ink Manufact. Co. Ltd. Yoshikawa
- 👤 Toru C/O Toyo Ink Manufact. Co. Ltd. Ohmura
- 👤 Motohiko Toyo Ink Manufact. Co. Ltd. Kashioka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 13:22
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/08; G06K19/10; G06K19/14; G06K7/00; G06K7/10; G06K7/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
63 words
A data-written medium the data of which are readable with a light source having a wavelength of 600 to 700 nm, he medium comprising a substrate and an ink layer encoding the data and containing not more than 0.1 g/m² of a chromatic color dye stuff absorbing substantially in the wavelength range of 600 to 700 nm and at least one other dyestuff.
Claim 2
Dependent Claim
63 words
A data-written medium the data of which are readable with a light source having a wavelength of 600 to 700 nm, he medium comprising a substrate and an ink layer encoding the data and containing not more than 0.1 g/m² of a chromatic color dye stuff absorbing substantially in the wavelength range of 600 to 700 nm and at least one other dyestuff.
Claim 3
Dependent Claim
15 words
A medium according to claim 1, wherein the data are encoded as a bar code.
Claim 4
Dependent Claim
13 words
A medium according to claim 1, wherein the data are encoded as characters.
Claim 5
Dependent Claim
26 words
A medium according to claim 1, 2 or 3 wherein said at least one other dyestuff is a warm color dyestuff and/or a white color dyestuff.
Claim 6
Dependent Claim
22 words
A medium according to claim 4, wherein the warm color dyestuff is at least one of red, orange, yellow and purple dyestuffs.
Claim 7
Independent Claim
19 words
A medium according to any one of the preceding claims wherein the dyestuff is a dye or a pigment.
Claim 8
Independent Claim
27 words
A medium according to any one of the preceding claims wherein the amount of chromatic color dyestuff in the ink layer is 0.005 g/m² to 0.08 g/m².
Claim 9
Independent Claim
26 words
A medium according to any one of the preceding claims wherein the ink layer has been formed from a heat-melting ink by a thermal transfer method.
Claim 10
Independent Claim
21 words
A medium according to any one of the preceding claim, wherein the chromatic color dyestuff is a blue or green dyestuff.
Claim 11
Dependent Claim
16 words
A medium according to claim 9, wherein the chromatic color dyestuff is a halogenated copper phthalocyanine.
Claim 12
Dependent Claim
16 words
A medium according to claim 10, wherein the halogenated copper phthalocyanine is a brominated copper phthalocyanine.
Claim 13
Independent Claim
30 words
A medium according to any one of the preceding claims of which the data are readable by measuring the reflection strength, transmission strength or absorption strength of the light source.
Claim 14
Independent Claim
37 words
A medium according to any one of the preceding claims, wherein the ink layer is formed by laminating an ink layer containing a chromatic color dyestuff and an ink layer containing said at least one other dyestuff.
Claim 15
Dependent Claim
85 words
A data-written medium the data of which are readable with light sources having a main wavelength of 600 to 1,500 nm, the medium comprising a substrate, an ink layer containing not more than 0.1 g/m² of a chromatic color dyestuff absorbing substantially in the wavelength range of 600 to 700 nm and at least one other dyestuff as the rest and another ink layer containing a substance absorbing substantially in the near infrared wavelength region, each of the two ink layers individually encoding said data.
Claim 16
Dependent Claim
85 words
A data-written medium the data of which are readable with light sources having a main wavelength of 600 to 1,500 nm, the medium comprising a substrate, an ink layer containing not more than 0.1 g/m² of a chromatic color dyestuff absorbing substantially in the wavelength range of 600 to 700 nm and at least one other dyestuff as the rest and another ink layer containing a substance absorbing substantially in the near infrared wavelength region, each of the two ink layers individually encoding said data.
References Cited (Backward Citations)
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