US4047033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Checking an identity, authority or check document or the like
Assignee: ID KORT AB
•
Filing: 1975-10-21
•
Granted: 1977-09-06
•
Expires: 1995-10-21
Abstract
Abstract A document such as an ID-card is provided with check markings comprising a material based upon rare earth metals and having the property that when excited by IR radiation it emits visible light. When checking the document, the document is irradiated with pulsed IR radiation, the occurrence of corresponding visible light pulses originating from said material being detected. The visible light pulses have well defined rise and decay times dictated by the check material used, which fact is used to check that output pulses from the detector are the correct ones for indicating the genuiness of the document.
Inventors
- 👤 Thor Anders Helge Malmberg
- 👤 Knut Goran Hogberg
- 👤 Stig Roland Sjoquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:24
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/12; G06K1/00; G06K1/12; G06K19/00; G06K19/06; G06K19/08; G06K19/10; G06K19/14; G07; G07F; G07F7/00; G07F7/08; G07F7/086
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
35 words
A checkable document, characterized in that it is provided with a marking comprising a material based upon rare earth metals, with the property that when excited by longer wave radiation it emits shorter wave radiation.
Claim 2
Dependent Claim
35 words
A checkable document, characterized in that it is provided with a marking comprising a material based upon rare earth metals, with the property that when excited by longer wave radiation it emits shorter wave radiation.
Claim 3
Dependent Claim
18 words
A document as claimed in claim 1, characterized in that said material is IR-excitable to emit visible light.
Claim 4
Dependent Claim
30 words
A document as claimed in claim 1, characterized in that said material is of the type Na Ln F 4 : Yb 3+ , Er 3+ (Ln: Y, Gd, La).
Claim 5
Dependent Claim
28 words
A document as claimed in claim 1, characterized in that said material is of the type Ln F 3 : Yb 3+ , Er 3+ (Ln: Y, La).
Claim 6
Dependent Claim
22 words
A document as claimed in claim 1, characterized in that the said material is applied in the form of a crystalline powder.
Claim 7
Dependent Claim
31 words
A document as claimed in claim 1, characterized in that the said material is applied in a predetermined pattern, especially in the form of a coded pattern of points or areas.
Claim 8
Dependent Claim
20 words
A document as claimed in claim 6, characterized in that said material is applied in a coded pattern of areas.
Claim 9
Independent Claim
79 words
A method of marking and checking a document, the method comprising the steps of at the time of marking providing the document with a material based on rare earth metals, which has the property that when excited by longer wave radiation, it emits shorter wave radiation; and at the time of checking, irradiating at least parts of the document which are provided with said material by said longer wave radiation, and detecting the presence of consequent shorter wave radiation.
Claim 10
Independent Claim
79 words
A method of marking and checking a document, the method comprising the steps of at the time of marking providing the document with a material based on rare earth metals, which has the property that when excited by longer wave radiation, it emits shorter wave radiation; and at the time of checking, irradiating at least parts of the document which are provided with said material by said longer wave radiation, and detecting the presence of consequent shorter wave radiation.
Claim 11
Dependent Claim
24 words
A method as claimed in claim 8, characterized in that said marking step includes applying said material in the form of a crystalline powder.
Claim 12
Dependent Claim
29 words
A method as claimed in claim 8, applied to a document produced by photographic techniques, characterized in that said marking step includes applying said material to the photographic emulsion.
Claim 13
Dependent Claim
30 words
A method as claimed in claim 8, characterized in that said marking step includes applying said material by applying a slurry thereof in a predetermined pattern using a screenprinting process.
Claim 14
Dependent Claim
29 words
A method as claimed in claim 8, characterized in that said checking step includes irradiating the document by using IR radiation produced by at least one light emitting diode.
Claim 15
Dependent Claim
48 words
A method as claimed in claim 8, characterized in that said checking step includes irradiating in pulsed fashion and determining the rise and decay times of corresponding detected pulses of shorter wave radiation in order to check that the said shorter wave radiation originates from the correct material.
Claim 16
Dependent Claim
72 words
A method as claimed in claim 8, characterized in that said checking step includes irradiating the document in accordance with a predetermined pattern of areas; detecting from which areas shorter wave radiation produced by the radiation excitation is received; and comparing information about the areas thus obtained with information obtained from another source and pertaining to the areas from which shorter wave radiation should be received, when irradiated with longer wave radiation.
Claim 17
Independent Claim
105 words
An apparatus for checking a document, which document is provided with a marking comprising a material based upon rare earth metals, having the property that when excited by longer wave radiation, it emits shorter wave radiation, the apparatus comprising means for placing the document and said radiation-generating and radiating-detecting means in a predetermined check position relatively to one another, a number of means for generating longer wave radiation for irradiation of said document; and a corresponding number of means for detecting shorter wave radiation emitted from said document as a consequense of said irradiation, each radiation- generating means being assigned to a specific radiation-detecting means.
Claim 18
Independent Claim
105 words
An apparatus for checking a document, which document is provided with a marking comprising a material based upon rare earth metals, having the property that when excited by longer wave radiation, it emits shorter wave radiation, the apparatus comprising means for placing the document and said radiation-generating and radiating-detecting means in a predetermined check position relatively to one another, a number of means for generating longer wave radiation for irradiation of said document; and a corresponding number of means for detecting shorter wave radiation emitted from said document as a consequense of said irradiation, each radiation- generating means being assigned to a specific radiation-detecting means.
Claim 19
Dependent Claim
19 words
An apparatus as claimed in claim 15, characterized in that each radiation-generating means includes an IR light emitting diode.
Claim 20
Dependent Claim
44 words
An apparatus as claimed in claim 15, characterized in that each radiation-generating means is arranged to emit the major part of its radiation energy within a limited wavelength range which is appropriate in view of the check material which said means is to excite.
Claim 21
Dependent Claim
16 words
An apparatus as claimed in claim 15, characterized in that each radiation-detecting means includes a photo-diode.
Claim 22
Dependent Claim
47 words
An apparatus as claimed in claim 15, characterized in that each radiation-detecting means is arranged to detect radiation largely exclusively within a limited wavelength range determined by the shorter wave radiation which is to be received from the check material and which said means is to detect.
Claim 23
Dependent Claim
60 words
An apparatus as claimed in claim 15, characterized in that pulse control means are arranged to pulseoperate said radiation-generating means and first check means, said first check means being arranged also to receive check pulse corresponding to output pulses from said radiation-detecting means assigned to said radiation-generating means, and if control and check pulse influencies coincide, to produce a pulse.
Claim 24
Dependent Claim
99 words
An apparatus as claimed in claim 20, characterized by means for statically holding the document and said radiation-generating and radiation-detecting means in a predetermined check position relatively to one another, said pulse control means comprising an oscillator for supplying a pulse train to said radiation-generating means and to said first check means when the check position is achieved, said first check means being arranged to check, in respect of each pair of radiation-generating and radiation-detecting means, that the number of pulses received in the pulse train corresponds with the number of check pulses also received at the same time.
Claim 25
Dependent Claim
45 words
An apparatus as claimed in claim 21, characterized in that said first check means comprise a first counter for counting the pulses in the pulse train; a second counter for counting the check pulses; and comparator means for comparing the counts of the two counters.
Claim 26
Dependent Claim
46 words
An apparatus as claimed in claim 20, characterized by means which, with dynamically executed checking, control the document and said radiation-generating and radiation-detecting means in relation to one another, said pulse control means being arranged to produce a control pulse in respect of each check position.
Claim 27
Dependent Claim
36 words
An apparatus as claimed in claim 20, characterized in that second check means are arranged to check that the output pulses received from said radiation-detecting means have rise and decay times which fall within predetermined limits.
Claim 28
Dependent Claim
43 words
An apparatus as claimed in claim 24, characterized in that said second check means are arranged to pass check or control pulses to said first check means, only if the rise and decay times of the output pulses fall within the predetermined limits.
Claim 29
Dependent Claim
42 words
An apparatus as claimed in claim 24, characterized in that said second check means are arranged to inhibit corresponding pulses from said first check means, if the output pulses have rise and decay times which do not fall within the predetermined limits.
Claim 30
Dependent Claim
52 words
An apparatus as claimed in claim 15, for checking a document carrying markings in the form of a coded pattern of areas, characterized by means for comparing the result of the check on the areas in the pattern with check information concerning the areas, which has been obtained from a different source.
Claim 31
Dependent Claim
17 words
An apparatus as claimed in claim 27, characterized by means for the permanent storage of check information.
References Cited (Backward Citations)
US3105908A
Cited
US3070698A
Cited
US3452332A
Cited
US3473027A
Cited
US3586640A
Cited
US3539941A
Cited
US3564215A
Cited
US3654463A
Cited
US3663813A
Cited
US3958970A
Cited
US3764807A
Cited
US3793527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |