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US5565276A
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Anti-falsification paper
Assignee: TOKUDHU PAPER Manufacturing Co Ltd
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Filing: 1995-10-11
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Granted: 1996-10-15
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Expires: 2015-10-11
Abstract
Abstract Anti-falsification paper characterized in that thin fragments having brightness, which are obtained by fragmenting nacreous pigment coated paper coated with a nacreous pigment coating solution mainly comprising a nacreous pigment and a binder insoluble in cold water but soluble in hot water, are allowed to exist near the surface of a substrate sheet. Even when falsification is attempted by reproduction using a color copying machine, the colors of the thin fragments having brightness, which are mixed in paper, cannot be reproduced. Therefore, a genuine (original) can be easily distinguished from a forgery (copy). The thin fragments are firmly bonded to paper by the action of the binder, and fall-off of the thin fragments does not occur at the time of printing. Even when anti-falsification paper becomes spoilage or waste paper, thin fragment with brightness does not adversely affect recovery of the pulp.
Inventors
- 👤 Toru Murakami
- 👤 Yoshiaki Ishii
- 👤 Shin-ichi Akahori
- 👤 Kenji Noda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:29
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/40; D21H27/00; D21H27/30; G; G03; G03G; G03G21/00; G03G21/04; G03G21/043; G03G7/00; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24901; Y10T428/24934; Y10T428/25; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
54 words
Anti-falsification paper comprising a substrate sheet containing fragments wherein said fragments having front and rear surfaces and brightness are obtained by fragmenting a paper coated with a solution comprising a nacreous pigment and a binder insoluble in cold water but soluble in hot water, said fragments existing near the surface of said substrate sheet.
Claim 2
Dependent Claim
54 words
Anti-falsification paper comprising a substrate sheet containing fragments wherein said fragments having front and rear surfaces and brightness are obtained by fragmenting a paper coated with a solution comprising a nacreous pigment and a binder insoluble in cold water but soluble in hot water, said fragments existing near the surface of said substrate sheet.
Claim 3
Dependent Claim
20 words
Anti-falsification paper according to claim 1, wherein a hot water dissolving temperature of said binder is 60° to 80° C.
Claim 4
Dependent Claim
23 words
Anti-falsification paper according to claim 1, wherein said fragments having brightness are dispersed throughout a portion near the surface of said substrate sheet.
Claim 5
Dependent Claim
24 words
Anti-falsification paper according to claim 1, wherein said fragments having brightness non-uniformly exist in a stripe form near the surface of said substrate sheet.
Claim 6
Dependent Claim
39 words
Anti-falsification paper according to claim 1, wherein said fragments having brightness exist near one of the surfaces of said substrate sheet, and a pigment coating layer having good printability is formed on the opposite surface of said substrate sheet.
Claim 7
Dependent Claim
46 words
Anti-falsification paper according to claim 1, wherein said fragments having brightness are obtained by fragmenting coated paper formed by further forming a coating layer of a transparent binder, which is insoluble in cold water but is soluble in hot water, on said nacreous pigment coated paper.
Claim 8
Dependent Claim
18 words
Anti-falsification paper according to claim 1, wherein said nacreous pigment is a nacreous pigment exhibiting a rainbow color.
Claim 9
Dependent Claim
21 words
Anti-falsification paper according to claim 7, wherein said fragments having brightness are a mixture of fragments having mutually different rainbow colors.
Claim 10
Dependent Claim
24 words
Anti-falsification paper according to claim 7, wherein said fragments having brightness are fragments having different rainbow colors on the front and rear surfaces thereof.
Claim 11
Dependent Claim
42 words
Anti-falsification paper according to claim 1, wherein paper comprising 98 to 70 parts by weight of a paper-making pulp and 2 to 30 parts by weight of a polyolefin synthetic pulp is used as base paper of said nacreous pigment coated paper.
Claim 12
Dependent Claim
56 words
Anti-falsification paper wherein said paper comprises two or more paper layers, and the outermost paper layer having a weight of 20 to 50 g/m 2 and containing fragments having brightness which are obtained by fragmenting paper coated with a solution comprising a nacreous pigment and a binder insoluble in cold water but soluble in hot water.
Claim 13
Dependent Claim
56 words
Anti-falsification paper wherein said paper comprises two or more paper layers, and the outermost paper layer having a weight of 20 to 50 g/m 2 and containing fragments having brightness which are obtained by fragmenting paper coated with a solution comprising a nacreous pigment and a binder insoluble in cold water but soluble in hot water.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-10-15 | 2000-04-15 | 2000-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-10-15 | 2004-04-15 | 2004-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-10-15 | 2008-04-15 | 2008-10-15 | $7700.00 | Window Closed / Lapsed |