US4897300A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Security paper
Assignee: GAO Gesellschaft fuer Automation und Organisation mbH
•
Filing: 1988-08-04
•
Granted: 1990-01-30
•
Expires: 2008-08-04
Abstract
Abstract The invention relates to a security paper having a security thread embedded therein, running from edge to edge, that is printed with luminescent colors in such a way that they are invisible in normal lighting. The luminescent colors are provided along the security thread in successive overlapping portions which, when the colors are excited, have a length recognizable to the naked eye and show characteristic mixed fluorescences in the overlapping areas.
Inventors
- 👤 Michael Boehm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:08
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/40; D21H21/42; G; G07; G07D; G07D7/00; G07D7/06; G07D7/12; B; B41; B41M; B41M3/00; B41M3/14; B42; B42D; B42D25/00; B42D25/30; B42D25/355; D21H21/44; D21H21/48; Y; Y10; Y10S; Y10S283/00; Y10S283/904; Y10S428/00; Y10S428/908; Y10S428/914; Y10S428/915; Y10S428/916; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/29; Y10T428/2913; Y10T428/2933
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
85 words
A security paper, in particular a bank note, having embedded therein, running from edge to edge, a security thread that is printed with luminescent colors, wherein the luminescent colors are colorless and transparent or paper-colored in the unexcited state and wherein along the security thread there are successive and overlapping portions which, when the colors are excited, have a length recognizable to the naked eye and are each printed with a different luminescent color, so that a characteristic compound color results in the overlapping areas.
Claim 2
Dependent Claim
85 words
A security paper, in particular a bank note, having embedded therein, running from edge to edge, a security thread that is printed with luminescent colors, wherein the luminescent colors are colorless and transparent or paper-colored in the unexcited state and wherein along the security thread there are successive and overlapping portions which, when the colors are excited, have a length recognizable to the naked eye and are each printed with a different luminescent color, so that a characteristic compound color results in the overlapping areas.
Claim 3
Dependent Claim
29 words
A security paper according to claim 1, wherein the compound color of the overlapping area runs smoothly and continuously into the colors of the portions including the overlapping area.
Claim 4
Dependent Claim
41 words
A security paper according to claim 1, wherein the luminescent colors are selected in such a way that the successive portions have basic colors of the additive color mixture and the particular, substantially pure compound colors result in the overlapping areas.
Claim 5
Dependent Claim
29 words
A security paper according to claim 3, wherein the fluorescent colors contain phosphors which emit red, green and/or blue light and the overlapping areas appear orange, green and/or violet.
Claim 6
Dependent Claim
38 words
A security paper according to claim 4, wherein the portions are printed red, green and blue so that the succession of colors in the portions and overlapping areas corresponds to the order of color in the natural spectrum.
Claim 7
Dependent Claim
40 words
A security paper according to claim 5, wherein the overlapping of the portions is selected in such a way that the length of the overlapping areas showing compound color corresponds to the length of the non-overlapping portions showing basic colors.
Claim 8
Dependent Claim
21 words
A security paper according to claim 1, wherein two colors are printed on top of each other in the overlapping areas.
Claim 9
Dependent Claim
42 words
A security paper according to claim 7, wherein at the beginning and end of each portion the particular quantity of color decreases continuously, so that in the overlapping areas there is approximately the same quantity of color altogether as in the portions.
Claim 10
Dependent Claim
23 words
A security paper according to claim 1, wherein two colors are printed into each other in a grid-like manner in the overlapping areas.
Claim 11
Dependent Claim
36 words
A security paper according to claim 9, wherein at the beginning and end of each portion the grid density decreases continuously, so that the overlapping areas have approximately the same grid density altogether as the portions.
Claim 12
Dependent Claim
31 words
A security paper according to claim 1, wherein the luminescent colors are selected so as to have high color purity and approximately the same luminosity with the same quantity of color.
Claim 13
Dependent Claim
40 words
A security paper according to claim 1, wherein the quantity of color in the portions is dosed in accordance with the particular luminosity of the colors so as to result in constant luminosity results over the length of the thread.
Claim 14
Dependent Claim
24 words
A security paper according to claim 1, wherein the luminescent colors contain phosphorescent phosphors and the afterglow time varies in the basic colors used.
Claim 15
Dependent Claim
17 words
A security paper according to claim 1, wherein the carrier material of the security thread is transparent.
Claim 16
Dependent Claim
41 words
A security paper according to claim 2, wherein the luminescent colors are selected in such a way that the successive portions have basic colors of the additive color mixture and the particular, substantially pure compound colors result in the overlapping areas.
References Cited (Backward Citations)
US4183989A
Cited
US4183989B1
Cited
EP0003187A2
Cited
EP0007383A1
Cited
US4442170A
Cited
US4451530A
Cited
US4451521A
Cited
US4452843A
Cited
US4756557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-29 | 1993-07-31 | 1994-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-29 | 1997-07-31 | 1998-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-29 | 2001-07-31 | 2002-01-30 | $7700.00 | Window Closed / Lapsed |