US5374976A
Expired / Lapsed
US
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Support provided with a machine detectable copying security element
Assignee: Joh Enschede en Zonen Grafische Inrichting BV
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Filing: 1993-08-12
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Granted: 1994-12-20
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Expires: 2013-08-12
Abstract
Abstract A support provided with a machine-detectable security element, particularly a copying-security element. The security element comprises a first image perceptible to the human visual system, said first image incorporating a second image that is substantially imperceptible to the human visual system.
Inventors
- 👤 Sijbrand Spannenburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:06
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/00838; H04N1/00856; H04N1/00875; B; B42; B42D; B42D25/00; B42D25/20; B42D25/29; H04N1/0084; H04N1/00843; H04N1/00846; H04N1/00859; H04N2201/00; H04N2201/32; H04N2201/3201; H04N2201/3269; H04N2201/327; Y; Y10; Y10S; Y10S283/00; Y10S283/901; Y10S283/902
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
66 words
A support provided with a machine-detectable copying security element comprising a first image perceptible to the human visual system and comprising multi-tone portions formed by image elements, said first image incorporating a second image detectable by a copying machine but substantially imperceptible to the human visual system and being formed by a deformation of at least a number of said image elements forming said first image.
Claim 2
Dependent Claim
66 words
A support provided with a machine-detectable copying security element comprising a first image perceptible to the human visual system and comprising multi-tone portions formed by image elements, said first image incorporating a second image detectable by a copying machine but substantially imperceptible to the human visual system and being formed by a deformation of at least a number of said image elements forming said first image.
Claim 3
Dependent Claim
69 words
A support provided with a machine-detectable copying security element comprising a first image, perceptible to the human eye at a normal distance of assessment, composed of image elements, at least a number of the image elements having a deformation in relation to a rounded dot, wherein this deformation is not perceptible to the human visual system at a normal distance of assessment, but is detectable by a copying machine.
Claim 4
Dependent Claim
69 words
A support provided with a machine-detectable copying security element comprising a first image, perceptible to the human eye at a normal distance of assessment, composed of image elements, at least a number of the image elements having a deformation in relation to a rounded dot, wherein this deformation is not perceptible to the human visual system at a normal distance of assessment, but is detectable by a copying machine.
Claim 5
Dependent Claim
17 words
A support according to claim 2, wherein the image elements are divided according to a raster pattern.
Claim 6
Dependent Claim
21 words
A support according to claim 3, wherein each deformed image element has an angular orientation in a plane of the support.
Claim 7
Dependent Claim
16 words
A support according to claim 4, wherein the angular orientation corresponds to a degree of deformation.
Claim 8
Dependent Claim
15 words
A support according to claim 2, wherein the deformed image elements consist of line segments.
Claim 9
Dependent Claim
28 words
A support according to claim 2, wherein the deformed image elements define a latent image reproducible by a copying machine as a visible addition to the first image.
Claim 10
Dependent Claim
16 words
A support according to claim 7, wherein said latent image is superposed on said first image.
Claim 11
Dependent Claim
34 words
A support according to claim 8, wherein the degree of deformation of each of the deformed image elements is a function of the gradation value of a corresponding image element of the first image.
Claim 12
Dependent Claim
13 words
A support according to claim 9 wherein the function is a binary function.
Claim 13
Dependent Claim
33 words
A support according to claim 8, wherein the raster pattern is essentially regular, and the first image is defined by variations in the surface area of individual image elements of the first image.
Claim 14
Dependent Claim
14 words
A support according to claim 7, wherein the latent image comprises a bar code.
Claim 15
Dependent Claim
44 words
A support according to claim 2, wherein the density of the deformed image elements is beyond the discerning capacity of the human visual system at a predetermined distance of assessment, so that the latent image is perceived by humans as a single tone image.
Claim 16
Dependent Claim
76 words
A support provided with a machine detectable copying security element comprising a first image perceptible to the human visual system and formed by image elements, said first image incorporating a second image that is substantially imperceptible to the human visual system, hence forming no portion of said perceived first image, said second image being formed by a deformation of at least a number of said image elements, said second image being detectable by a copying machine.
Claim 17
Dependent Claim
76 words
A support provided with a machine detectable copying security element comprising a first image perceptible to the human visual system and formed by image elements, said first image incorporating a second image that is substantially imperceptible to the human visual system, hence forming no portion of said perceived first image, said second image being formed by a deformation of at least a number of said image elements, said second image being detectable by a copying machine.
Claim 18
Dependent Claim
105 words
An image support carrying an image perceptible to the human visual system, said support having an image support axis, said image being composed of line segments arranged in a regular raster pattern, each line segment forming an angle with respect to the image support axis, at least one of the line segments forming a maximum angle, at least another of the line segments forming a minimum angle, the angles formed by the other line segments varying continuously between the minimum and maximum angles, the angular orientations of said line segments being substantially imperceptible to the human visual system, and said image being reproducible by copying.
Claim 19
Dependent Claim
105 words
An image support carrying an image perceptible to the human visual system, said support having an image support axis, said image being composed of line segments arranged in a regular raster pattern, each line segment forming an angle with respect to the image support axis, at least one of the line segments forming a maximum angle, at least another of the line segments forming a minimum angle, the angles formed by the other line segments varying continuously between the minimum and maximum angles, the angular orientations of said line segments being substantially imperceptible to the human visual system, and said image being reproducible by copying.
Claim 20
Dependent Claim
56 words
An image support according to claim 15, wherein the continuous variation of the angles of the line segments within an area of the image is a continuous function of the gradation value of a security element forming an area identical to said area of the image, said image and said security element being reproducible by copying.
Claim 21
Dependent Claim
74 words
An image support according to claim 16, wherein said function is: ##EQU3## wherein is Φi the angle formed by line segment i having coordinates (x,y) within the area of the raster pattern, d (x,y) is the gradation value of the security element at the point (x,y) within the area of the security element, d min is the minimum gradation value, d max is the minimum gradation value, and Φ O is an initial angle.
Claim 22
Independent Claim
128 words
A method of producing a regular raster pattern for printing an image perceptible to the human visual system on an image support, said regular raster pattern having a raster axis, said regular raster pattern consisting of raster picture elements each consisting of a line segment, the method comprising providing each line segment with an individual angular orientation with respect to the raster axis, at least one of the line segments forming a maximum angle with respect to the raster axis, at least another of the line segments forming a minimum angle with respect to the raster axis, the angles formed by the remaining line segments varying continuously between the minimum and maximum angles, said angular orientations of said line segments being substantially imperceptible to the human visual system.
Claim 23
Independent Claim
128 words
A method of producing a regular raster pattern for printing an image perceptible to the human visual system on an image support, said regular raster pattern having a raster axis, said regular raster pattern consisting of raster picture elements each consisting of a line segment, the method comprising providing each line segment with an individual angular orientation with respect to the raster axis, at least one of the line segments forming a maximum angle with respect to the raster axis, at least another of the line segments forming a minimum angle with respect to the raster axis, the angles formed by the remaining line segments varying continuously between the minimum and maximum angles, said angular orientations of said line segments being substantially imperceptible to the human visual system.
Claim 24
Independent Claim
175 words
A method of producing a regular raster pattern for printing an image perceptible to the human visual system on an image support, said regular raster pattern having a raster axis, said regular pattern consisting of raster picture elements each consisting of a line segment, the method comprising providing each line segment with an individual angular orientation with respect to the raster axis, at least one of the line segments forming a maximum angle with respect to the raster axis, at least another of the line segments forming a minimum angle with respect to the raster axis, the angles formed by the remaining line segments varying continuously between the minimum and maximum angles, said continuously varying angles of the line segments within an area of the raster pattern being a continuous function of a gradation value of a security element forming an area identical to said area of the raster pattern, said angular orientations of said line segments being substantially imperceptible to the human visual system, said image and said security element being reproducible by copying.
Claim 25
Independent Claim
175 words
A method of producing a regular raster pattern for printing an image perceptible to the human visual system on an image support, said regular raster pattern having a raster axis, said regular pattern consisting of raster picture elements each consisting of a line segment, the method comprising providing each line segment with an individual angular orientation with respect to the raster axis, at least one of the line segments forming a maximum angle with respect to the raster axis, at least another of the line segments forming a minimum angle with respect to the raster axis, the angles formed by the remaining line segments varying continuously between the minimum and maximum angles, said continuously varying angles of the line segments within an area of the raster pattern being a continuous function of a gradation value of a security element forming an area identical to said area of the raster pattern, said angular orientations of said line segments being substantially imperceptible to the human visual system, said image and said security element being reproducible by copying.
Claim 26
Independent Claim
247 words
A method of producing a regular raster pattern for printing an image perceptible to the human visual system on an image support, said regular raster pattern having a raster axis, said regular pattern consisting of raster picture elements each consisting of a line segment, the method comprising providing each line segment with an individual angular orientation with respect to the raster axis, at least one of the line segments forming a maximum angle with respect to the raster axis, at least another of the line segments forming a minimum angle with respect to the raster axis, the angles formed by the remaining line segments varying continuously between the minimum and maximum angles, said continuously varying angles of the line segments within an area of the raster pattern being a continuous function of a gradation value of a security element forming an area identical to said area of the raster pattern, said function being defined by the expression: ##EQU4## wherein Φ i is the angle formed by the line segment i having coordinates (x,y) within the area of the raster pattern, d (x,y) is the gradation value of the security element at the point (x,y) within the area of the security element, d min is the minimum gradation value, d max is the maximum gradation value, and Φ O is an initial angle, said angular orientations of said line segments being substantially imperceptible to the human visual system, said image and said security element being reproducible by copying.
Claim 27
Independent Claim
247 words
A method of producing a regular raster pattern for printing an image perceptible to the human visual system on an image support, said regular raster pattern having a raster axis, said regular pattern consisting of raster picture elements each consisting of a line segment, the method comprising providing each line segment with an individual angular orientation with respect to the raster axis, at least one of the line segments forming a maximum angle with respect to the raster axis, at least another of the line segments forming a minimum angle with respect to the raster axis, the angles formed by the remaining line segments varying continuously between the minimum and maximum angles, said continuously varying angles of the line segments within an area of the raster pattern being a continuous function of a gradation value of a security element forming an area identical to said area of the raster pattern, said function being defined by the expression: ##EQU4## wherein Φ i is the angle formed by the line segment i having coordinates (x,y) within the area of the raster pattern, d (x,y) is the gradation value of the security element at the point (x,y) within the area of the security element, d min is the minimum gradation value, d max is the maximum gradation value, and Φ O is an initial angle, said angular orientations of said line segments being substantially imperceptible to the human visual system, said image and said security element being reproducible by copying.
References Cited (Backward Citations)
US4310180A
Cited
US4210346A
Cited
US4168088A
Cited
US4175774A
Cited
US4175774B1
Cited
US4227719A
Cited
US4579370A
Cited
DE3419859A1
Cited
JPS6017778A
Cited
US4891666A
Cited
US5078428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-12-19 | 1998-06-20 | 1998-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-19 | 2002-06-20 | 2002-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-19 | 2006-06-20 | 2006-12-20 | $7700.00 | Window Closed / Lapsed |