Patent US3634012A successfully refreshed from Google Patents.
US3634012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for examining intaglio printing
Assignee: Individual
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Filing: 1970-04-14
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Granted: 1972-01-11
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Expires: 1990-04-14
Abstract
Abstract An optical technique for examining a printed surface to ascertain if it has been printed in accordance with an intaglio printing process, wherein a portion of the embossed printed surface is alternately illuminated in directions longitudinal with and transverse to the embossed surface, the reflected light is detected by light-sensitive devices and the responses of the devices are compared to establish the authenticity of the printed surface.
Inventors
- 👤 Rudolf Mustert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:13
CPC Classifications
G; G07; G07D; G07D7/00; G07D7/06; G07D7/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
94 words
A method of examining for intaglio printing a surface, a portion of said surface being characterized by ridges and by valleys therebetween and therefore having an optically preferred direction, comprising the steps of: illuminating said portion at a small angle of light incidence Alpha alternately in a direction approximately transverse to said ridges and in a direction approximately parallel to said ridges; measuring the light alternately reflected from said portion in said directions transverse to and parallel to said ridges at a small average angle Beta of light reflection; and comparing the alternate measurements.
Claim 2
Independent Claim
94 words
A method of examining for intaglio printing a surface, a portion of said surface being characterized by ridges and by valleys therebetween and therefore having an optically preferred direction, comprising the steps of: illuminating said portion at a small angle of light incidence Alpha alternately in a direction approximately transverse to said ridges and in a direction approximately parallel to said ridges; measuring the light alternately reflected from said portion in said directions transverse to and parallel to said ridges at a small average angle Beta of light reflection; and comparing the alternate measurements.
Claim 3
Dependent Claim
25 words
A method according to claim 1 wherein said angle of light incidence Alpha and said angle of light reflection Beta are less than approximately 6*.
Claim 4
Dependent Claim
25 words
A method according to claim 1 wherein said portion is hatched and said illuminating is alternately in the longitudinal direction and in the transverse direction.
Claim 5
Independent Claim
129 words
A system for examining for intaglio printing a surface, a portion of said surface being characterized by ridges and valleys therebetween and therefore having an optically preferred direction, comprising: means for illuminating said portion at a small angle of light incidence Alpha alternately in a direction approximately transverse to said ridges and in a direction approximately parallel to said ridges; light-responsive means for detecting the light alternately reflected from said portion in said directions transverse to and parallel to said ridges said light-responsive means positioned at a small average angle of light reflection Beta , said light-responsive means producing output signals in accordance with said reflected light; and evaluation means operably connected to said light-responsive means and responsive to said output signals for developing an indication of said surface.
Claim 6
Independent Claim
129 words
A system for examining for intaglio printing a surface, a portion of said surface being characterized by ridges and valleys therebetween and therefore having an optically preferred direction, comprising: means for illuminating said portion at a small angle of light incidence Alpha alternately in a direction approximately transverse to said ridges and in a direction approximately parallel to said ridges; light-responsive means for detecting the light alternately reflected from said portion in said directions transverse to and parallel to said ridges said light-responsive means positioned at a small average angle of light reflection Beta , said light-responsive means producing output signals in accordance with said reflected light; and evaluation means operably connected to said light-responsive means and responsive to said output signals for developing an indication of said surface.
Claim 7
Dependent Claim
25 words
A system according to claim 4 wherein said angle of light incidence Alpha and said angle of light reflection Beta are less then approximately 6*.
Claim 8
Dependent Claim
21 words
A system according to claim 4 wherein said illuminating means includes means for substantially excluding ambient light from said illuminated portion.
Claim 9
Independent Claim
148 words
A system for examining for intaglio printing a surface, a portion of said surface being characterized by ridges and by valleys therebetween and therefore having an optically preferred direction, comprising: a single source of light; reflective means for directing said light for illuminating said portion at a small angle of light incidence Alpha in a direction approximately transverse to said ridges, in a direction approximately parallel to said ridges; means for interrupting said light so as to illuminate said portion alternately in said directions transverse to and parallel to said ridges; light-responsive means for detecting the light alternately reflected from said portion, said light-responsive means at a small average angle of light reflection Beta , said light-responsive means producing output signals in accordance with said reflected light; and evaluation means connected to said light-responsive means and responsive to said output signals for developing an indication of said surface.
Claim 10
Independent Claim
148 words
A system for examining for intaglio printing a surface, a portion of said surface being characterized by ridges and by valleys therebetween and therefore having an optically preferred direction, comprising: a single source of light; reflective means for directing said light for illuminating said portion at a small angle of light incidence Alpha in a direction approximately transverse to said ridges, in a direction approximately parallel to said ridges; means for interrupting said light so as to illuminate said portion alternately in said directions transverse to and parallel to said ridges; light-responsive means for detecting the light alternately reflected from said portion, said light-responsive means at a small average angle of light reflection Beta , said light-responsive means producing output signals in accordance with said reflected light; and evaluation means connected to said light-responsive means and responsive to said output signals for developing an indication of said surface.
Claim 11
Dependent Claim
25 words
A system according to claim 7 wherein said angle of light incidence Alpha and said angle of light reflection Beta are less than approximately 6*.
Claim 12
Dependent Claim
18 words
A system according to claim 7 in which said output signals are approximately in the ratio of 2:1.
References Cited (Backward Citations)
US2951164A
Cited
US3457421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |