EP0595583A1
Expired / Lapsed
EP
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Non-visualized information recording medium and apparatus for detecting the same
Assignee: Canon Inc
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Filing: 1993-10-25
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Granted: —
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Expires: 2013-10-25
Abstract
Abstract An object of the present invention is to provide a non-visualized information recording medium for assuredly judging a specific document while reducing the cost. In order to achieve the foregoing object, according to the present invention, there is provided a non-visualized information recording medium having an identification mark formed by an ink containing a plurality of fluorescent coloring materials or fluorescent pigments, each of which has a fluorescent wave length in a near infrared region, and which have absorption spectrums having the maximum wave lengths that do not overlap each other.
Inventors
- 👤 Kazuo c/o Canon K. K. Yoshinaga
- 👤 Shinobu c/o Canon K. K. Arimoto
- 👤 Toshio c/o Canon K. K. Hayashi
- 👤 Takehiko c/o Canon K. K. Nakai
- 👤 Tsutomu c/o Canon K. K. Utagawa
- 👤 Tetsuya c/o Canon K. K. Nagase
- 👤 Nobuatsu C/O Canon K. K. Sasanuma
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 18:14
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/00838; H04N1/0084; H04N1/00843; H04N1/00846; B; B41; B41M; B41M3/00; B41M3/14; B41M3/144; B42; B42D; B42D25/00; B42D25/20; B42D25/29; G; G03; G03G; G03G21/00; G03G21/04; G03G21/046; G07; G07D; G07D7/00; G07D7/06; G07D7/12; G07D7/121; H04N1/00856; H04N1/00864; H04N1/00867; H04N1/00875; H04N1/00883
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
52 words
A non-visualized information recording medium comprising: an identification mark formed by an ink containing a plurality of fluorescent coloring materials or fluorescent pigments, each of which has a fluorescent wave length in a near infrared region, and which have absorption spectrums having the maximum wave lengths that do not overlap each other.
Claim 2
Dependent Claim
46 words
A non-visualized information recording medium according to claim 1, wherein said identification mark formed by said ink containing said fluorescent coloring materials or fluorescent pigments each of which has the fluorescent wave length in the near infrared region, is an identification mark for judging copy inhibition.
Claim 3
Dependent Claim
36 words
A non-visualized information recording medium according to claim 1, wherein the peak of the fluorescent wave length of said fluorescent coloring material or said fluorescent pigment is 700 nm or longer and 1100 nm or shorter.
Claim 4
Dependent Claim
26 words
A non-visualized information recording medium according to claim 1, wherein said identification mark is a mark recorded at a resolving power of 16 pel or less.
Claim 5
Dependent Claim
28 words
A non-visualized information recording medium according to claim 1, wherein the maximum wave lengths of said absorption spectrums are separated from each other by 50 nm or longer.
Claim 6
Independent Claim
91 words
An apparatus for judging a specific document comprising: reading means for reading fluorescent information except for visible light information from an original document on which an identification mark formed by an ink containing a plurality of fluorescent coloring materials or fluorescent pigments, each of which has a fluorescent wave length in a near infrared region, and which have absorption spectrums having the maximum wave lengths that do not overlap each other; and judging means for judging whether or not said original document read by said reading means is a specific document.
Claim 7
Dependent Claim
31 words
An apparatus for judging a specific document according to claim 6, wherein said reading means comprises a first sensor for obtaining visible information and a second sensor for obtaining non-visualized information.
Claim 8
Dependent Claim
32 words
An apparatus for judging a specific document according to claim 6 further comprising image forming means for forming an image in accordance with a result of judgement made by said judging means.
Claim 9
Dependent Claim
38 words
An apparatus for judging a specific document according to claim 6, wherein the peak of the fluorescent wave length of said fluorescent coloring material or said fluorescent pigment is 700 nm or longer and 1100 nm or shorter.
Claim 10
Dependent Claim
28 words
An apparatus for judging a specific document according to claim 6, wherein said identification mark is a mark recorded at a resolving power of 16 pel or less.
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