EP0338123B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Device for verifying documents
Assignee: Assunzione O Variazione Mandato fumero - Studio Co
•
Filing: 1988-11-19
•
Granted: 1993-02-03
•
Expires: 2008-11-19
Abstract
Abstract A device for recognising the authenticity of documents (1) consists of a reading head (3, 4), a lighting device with at least one light source (26), an electronic evaluation device (5), a transport device (2) for generating a relative movement between the document (1) and reading head (3, 4), and a sorting device (62) controlled by the evaluation device (5). The reading head (3, 4) is composed of at least two identical modules (4), each having a row of photo sensors. The modules (4) are arranged so that they can be plugged parallel to one another in sockets of a connection plate (3). Each socket has guide means (7, 16; 10, 13; 15) for an exact positioning of the plugged-in modules (4). Plug connectors (28; 33) for optical conductors (27) and electrical conductors (31) connect each module (4) to the evaluation device (5). The modules (4) carry out a line scan, transversely relative to the direction of transport, of the document (1) transported through under them, by means of the photo sensors, in different predetermined spectral ranges and transmit the measurement values to the evaluation device (5). The spectral sensitivity of the modules (4) is determined by exchangeable filters (55) or light sources (26) located outside the modules (4). <IMAGE>
Inventors
- 👤 Christian Bercovitz
- 👤 Alexandre Feyjoo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 10:08
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/10831; G06K7/10712; G06K7/10762; G07; G07D; G07D7/00; G07D7/06; G07D7/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
184 words
Apparatus for detecting the authenticity of documents (1) comprising a reading head (3, 4, 4') with photoelectric sensors (18) which are arranged in a line and which optically scan the document (1) in a line-wise manner, an illumination device with at least one light source (26), an electronic evaluation device (5) for correlation of the signals received from the photoelectric sensors (18) with stored presetting values, a transport device (2) for producing a relative movement between the document (1) and the reading head (3, 4, 4') and a sorting device (62) which is controlled by the evaluation device (5) in dependence on the correlation value, characterised in that the reading head (3, 4, 4') has at least two similar modules (4; 4') which each have a line of photoelectric sensors (18) and which can be plugged on to a connection (3) so that they are disposed in parallel side-by-side relationship with optical axes (19, 19') arranged at a spacing from each other and which respectively scan the document (1) in a predetermined spectral range which is respectively determined by means defining the spectral range.
Claim 2
Dependent Claim
184 words
Apparatus for detecting the authenticity of documents (1) comprising a reading head (3, 4, 4') with photoelectric sensors (18) which are arranged in a line and which optically scan the document (1) in a line-wise manner, an illumination device with at least one light source (26), an electronic evaluation device (5) for correlation of the signals received from the photoelectric sensors (18) with stored presetting values, a transport device (2) for producing a relative movement between the document (1) and the reading head (3, 4, 4') and a sorting device (62) which is controlled by the evaluation device (5) in dependence on the correlation value, characterised in that the reading head (3, 4, 4') has at least two similar modules (4; 4') which each have a line of photoelectric sensors (18) and which can be plugged on to a connection (3) so that they are disposed in parallel side-by-side relationship with optical axes (19, 19') arranged at a spacing from each other and which respectively scan the document (1) in a predetermined spectral range which is respectively determined by means defining the spectral range.
Claim 3
Dependent Claim
32 words
Apparatus according to claim 1 characterised in that optical filters (55) are used as the means defining the spectral range and are arranged between the respective modules (4) and the document (1).
Claim 4
Dependent Claim
60 words
Apparatus according to claim 1 characterised in that each module (4, 4') has optical conductors (20) for illuminating the document (1), the conductors being arranged on both sides and symmetrically relative to the line of the photoelectric sensors (18), and that the optical axes (19) of the photoelectric sensors (18) are oriented perpendicularly to the plane of the document (1).
Claim 5
Dependent Claim
67 words
Apparatus according to one of the preceding claims characterised in that electric lines (31) between each module (4, 4') and the evaluation device (5) are plug-in connected by means of a plug (32) and a plug socket (33) and the optical conductors (20) in each module (4; 4') and light guides (27) are plug-in connected by means of an optical connector (25) and its co-operating portion (28).
Claim 6
Dependent Claim
158 words
Apparatus according to one of the preceding claims characterised in that it includes a connecting plate (3) on the reading head (3, 4, 4') with plug-in locations for the modules (4; 4'), that the connecting plate (3) and each module (4; 4') has at each plug-in location guide means (7, 16; 9, 15; 10, 13) for reproducibly plugging-in the module (4; 4') into a predetermined position and plug connectors (25, 28; 32, 33) which detachably connect each module (4; 4') by means of optical conductors (20; 27) and electric lines (31) to the light source (26) and to the evaluation device (5), that the plug connectors (25, 27; 32, 33) are automatically engageable when a module (4; 4') is inserted into the reading head (3, 4, 4'), being guided by the guide means (7, 16; 9, 15; 10, 13), wherein the limit position of the module (4; 4') is predetermined by the plug connectors (25, 27; 32, 33).
Claim 7
Dependent Claim
46 words
Apparatus according to one of the preceding claims characterised in that each module (4) has at least one multiplexer (35) which is connected in the module (4) to the photoelectric sensors (18), for reducing the number of electric lines (31) leading to the evaluation device (5).
Claim 8
Dependent Claim
44 words
Apparatus according to claim 6 characterised in that each module (4) has at least one amplifier (38; 41) with adjustable logarithmic gain, whose gain factor is adjustable by the evaluation device (5) to compensate for different levels of sensitivity of the various modules (4).
Claim 9
Dependent Claim
29 words
Apparatus according to one of claims 6 and 7 characterised in that each module (4) includes at least one analog-digital converter which is controlled by the evaluation device (5).
Claim 10
Dependent Claim
54 words
Apparatus according to one of the preceding claims characterised in that an optical filter (55) is arranged in front of at least one of the modules (4) on the side towards the document (1), wherein light (30) which is incident on the document (1) and which is reflected therefrom passes through the filter (55).
Claim 11
Dependent Claim
13 words
Apparatus according to claim 9 characterised in that the filters (55) are interchangeable.
Claim 12
Dependent Claim
34 words
Apparatus according to one of the preceding claims characterised in that light which is fed into the module (4) through the plug connectors (25, 27) has a predetermined spectral range for each module (4).
Claim 13
Dependent Claim
65 words
Apparatus according to one of the preceding claims characterised in that the evaluation device (5) can be synchronised to the transportation speed of the document (1) by the transport device (2) by means of a stepping signal (57) and that the document (1) can be continuously transported through the apparatus beneath the modules (4) and can be read line-wise by means of the modules (4).
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.