US3725667A - Bank note testing apparatus - Google Patents

Bank note testing apparatus Download PDF

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Publication number
US3725667A
US3725667A US00189100A US3725667DA US3725667A US 3725667 A US3725667 A US 3725667A US 00189100 A US00189100 A US 00189100A US 3725667D A US3725667D A US 3725667DA US 3725667 A US3725667 A US 3725667A
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Prior art keywords
bank note
photo
amplifier
bank
masking
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Expired - Lifetime
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US00189100A
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English (en)
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H Schwartz
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Individual
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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G07D7/121—Apparatus characterised by sensor details

Definitions

  • ABSTRACT A process and an apparatus for testing bank notes for their genuineness, particularly for automatic vending machines, wherein the bank note is illuminated from one side from a light source through a mask.
  • the printed image on one side of the bank note is divided by the mask into several test fields.
  • the reflected light from each test field is received by one of a plurality of large area photoelectric cells, which are so connected that departures from a given value are added together to form an error signal.
  • This invention relates to a process or method for testing the genuineness of bank notes, particularly for automatic vending machines, and to a bank note testing apparatus using the process.
  • Vending machines which are operated by coins have been known for a long time.
  • the inserted coins are tested therein by test devices, for example in terms of diameter, thickness, weight or metal alloy, in order to separate genuine and false coins.
  • bank notes are to be accepted by automatic machines, then, in similar fashion to coin checking, these must be tested for genuineness.
  • Bank notes are essentially printed pieces of paper; compared to coins they have wholly different recognition features, and as a result, require different testing methods.
  • bank notes are illuminated from one side with light and on the other side there are arranged in irregular order a plurality of photocells, which measure the light values transmitted, which are each different according to the bank notes image printed on both sides thereon, then the defects of bank notes mentioned above, such as format and printed image deviations or spots, already give substantial differences from the expected value, which according to the adjusted error tolerance field would in many cases lead to non acceptance of the bank note by the testing apparatus, although it was genuine.
  • the bank note is illuminated from one side from a light source through a mask, whereby the printed image on the bank note is divided by the mask into several test fields, the reflected light from each test field is evaluated to form an electrical measured value. The departures from the expected measured value are then added to give an error signal.
  • the apparatus comprises a light source, a mask for dividing the printed image on the bank note into a plurality of test fields.
  • Value generators are associated with each test field and receive reflected light from the image on the bank note for the purpose of forming a measured value, the measured value generators being so connected that departures from a given value are added together to form an errorsignal, so that a high certainty of judgement canbe obtained in respect of the bank notes to be tested, but wherein the insufficiences of bank notes only have a very small effect on the test result and on the other hand variations determined by the addition nevertheless give a very high certainty of the genuineness testing.
  • FIG. 2 is a view from the top of the bank note testing device according to the invention, in schematic illustration,
  • FIG. 3 is an electric circuit diagram of the testing device
  • FIG. 4 is a detail of the electric circuit of a discriminator
  • FIG. 5 is a side view of the apparatus
  • FIG. 6 is a front view of the apparatus shown in FIG. 5.
  • a bank note 1 to be tested is divided by means of a mask or grate into four equally sized test areas a, b, c and d, as can be seen in FIG. I.
  • the central crossing dashed lines 2 show the normal folds present in used bank notes. These folds, as well as the two narrow edges of a bank note are more liable to damage and are covered over for the measurement by means of a mask 6 having the form of a frame or grid with crossed strips of about 6-l0mm width.
  • the thus remaining four surfaces 0, b, c and d of the bank note image which are used for the measurement are shown hatched in FIG. 1 and together form a surface, which in comparison to the whole of the surface of the bank note amounts to at least 50 percent, preferably at least percent, thereof. These surfaces a, b, c and d are by reflected light.
  • the photocells 10 used have a relatively large surface area, preferably of the type "of silicon photo elements, which receive the light reflected from the bank note paper without optical aids such as lenses or the like, and which generate the measured value.
  • the bank note 1 to be tested arrives from above via a funnel 52 (FIGS. 4, 5) into the testing apparatus behind a glass window 7.
  • a funnel 52 FIGS. 4, 5
  • the bank note 1 is pressed by a plate 48 against the receptor surface of the glass plate or window 7.
  • the center vertical frame plate 15 is provided on both sides with cavities in each of which in depressed position a photocell 10 or another light-sensitive organ lies.
  • this plate of the mask 6 is provided in all with four photocells 10 which lie opposite one another in pairs and right-angled to the bank note 1 (FIG. 2).
  • the photocells 10 are constructed as comparatively thin discs and are arranged in such a fashion that light beams 13, 14 coming from an electrical glow lamp 11 do not fall directly onto these photocells 10.
  • a filter glass 12 is provided which stops the infra-red portion of light so that the bank note l is really only illuminated with the visible part of the spectrum.
  • the reflected light from the bank note which falls on the photocells 10 gives, according to the printed image and the printed colors, an electric signal which can be evaluated as a measured value.
  • connection pair is fed to a differentially working discriminator 25-31 ⁇ .
  • the four photocell amplifiers 18-21 are each provided with a trim potentiometer, the amplifier outputs which are generated when an average bank note is laid in the testing device can be adjusted against a fixed reference voltage to a null value.
  • the differential evaluation has the advantage that a regular use of the bank note or regular coloration changes will not be noted as an error for all the four fields. By this also, better stability is imparted to the device itself against external influences, such as ageing of the glow lamp 1 l of or the photocells 10.
  • the outputs of the six discriminators 25-30 are connected together in parallel and this connection is fed across an adjustable resistance 35, an amplifier stage 33 and a switching stage 34.
  • This switching stage 34 can either be a relay, an electromagnet or a transistor for accepting of rejecting a bank note after testing.
  • variable resistance 35 the differential devices work as current generators and give a current proportional in size to the faults of the bank note present, which is translated to a voltage by resistance 35.
  • FIG. 4 the components used in a discriminator and the corresponding circuit are described in more detail. Only a single discriminator 25 having a pair of photocells connected thereto with the circuit means as illustrated will be described; the other discriminators 26-30 are likewise constructed.
  • each of the photocells 10 is connected to an amplifier 18-21.
  • One amplifier 18 is connected via a lead 38 with the base of a transistor 39.
  • the collector of this transistor is connected via a lead 40 to the lead 32 common to all discriminators.
  • the emitter of this transistor 39 is connected via a lead 42 to the output 23 of the other amplifier 19, with the interposition of a resistance 43.
  • This amplifier output 23 of the second amplifier 19 is connected to the base of a second transistor 44, the collector of which is connected via a lead $5 with the lead 32.
  • the emitter of this second transistor 44 is connected via a lead 46 in which is located a resistance 47 to the first amplifier output 38.
  • a bank note l If a bank note l is pushed by hand in direction of arrow D into the funnel 52 (FIGS. 5, 6), it falls by gravity along a vertical channel 54 into the testing apparatus behind a glass window 7.
  • the channel 54 is laterally limited by guide plates 69 and at the bottom by a stop member 59.
  • a pair of upper and a lower light barriers 55, 56 and 57 are arranged in the path of motion of the bank note ll, with the effect that the two electromagnets 49 are energized if the light beams of the light barriers are interrupted.
  • Each of the electromagnets 49 which are acting parallel are com nected by rod 50 with a pressure plate 48 so that the bank note 1 is pressed against the glass window 7 after moving the pressure plate 18 in direction of arrow C.
  • the bank note 1 pushes with the lower narrow edge 16 against the stop member 59 which is a part of a rocker or switch tongue 58 pivotally supported by a horizontal pin 60.
  • This switch tongue 58 is connected by a push rod 61 with two electromagnets 62, 63 acting in opthe switching stage 64 acts in such manner that either electromagnet 62 or electromagnet 63 is energized.
  • electromagnet 62 is energized the switch tongue is pivoted in direction of arrow A and the bank note 1 is falling by gravity along a sheet metal guide 67 into a magazine or cashbox 65 arranged inside the apparatus.
  • the switch tongue 58 is swivelled in direction of arrow B if the bank note lis to be rejected. In this case the bank note 1 is falling into the return channel 64 after the pressure plate 48 has released the bank note 1.
  • a Bank note testing apparatus comprising a light source (11 means (7, 48) holding the Bank note in a predetermined plane; masking means (6) covering a minor portion of the illuminated surface area of the Bank noteand dividing the Bank note into a plurality of' test fields, said test fields comprising at least 50 percent of the illuminated surface area of the Bank note, said masking means including opaque, sheetlike elements (3-, 5, 8, 15) projecting from the plane of the Bank note in the direction towards the light source;
  • a plurality of large area-type photo-sensitive means having photo-sensitive surfaces located at an angle with respect to the surface plane of the Bank note and to receive reflected light from the test fields of the Bank note, at least one each photosensitive means being associated with a test field and responsive, selectively, to reflected light therefrom, said sheet-like elements shielding the photo-sensitive means with respect to reflected light from adjacent fields;
  • Apparatus according to claim 1 wherein the masking means are arranged to cover at least some of the edges of the Bank note
  • the logic circuit means comprises amplifier means (18-21) connected to each said light sensitive means (10);
  • each amplifier means being connected to selected ones of said discriminator means of said group to compare the output of any one amplifier means with that from any other amplifier means to derive said composite output signal.
  • each discriminator (25-30) comprises two transistors (39, 44) and two resistors (42, 47), the base of any one transistor being connected to the output of one amplifier (18-21) and the emitter of said one transistor being connected over one of said two resistors tothe output of another one of said amplifiers.
  • test field comprises about at least percent of one surface of the Bank note.
  • a method of testing Bank notes for genuineness comprising the steps of I illuminating the Bank note from one side; dividing the'Bank note into a plurality of test fields which comprise, overall, at least 50 percent of the plane area of the Bank note, by masking strip-like portions of said Bank note, at least one of said strip-like portions dividing the Bank note in half to cover expected fold lines in used Banknotes;

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Sorting Of Articles (AREA)
US00189100A 1970-10-20 1971-10-14 Bank note testing apparatus Expired - Lifetime US3725667A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1543370A CH555071A (de) 1970-10-20 1970-10-20 Banknotenpruefgeraet.

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US3725667A true US3725667A (en) 1973-04-03

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CH (1) CH555071A (de)
DE (1) DE2150910A1 (de)
FR (1) FR2111588A5 (de)
GB (1) GB1361420A (de)

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2311364A1 (fr) * 1975-05-13 1976-12-10 Glory Kogyo Kk Appareil d'identification de billets de banque
US4041456A (en) * 1976-07-30 1977-08-09 Ott David M Method for verifying the denomination of currency
US4179685A (en) * 1976-11-08 1979-12-18 Abbott Coin Counter Company, Inc. Automatic currency identification system
EP0012724A1 (de) * 1978-12-18 1980-06-25 GRETAG Aktiengesellschaft Verfahren zur maschinellen Beurteilung der Druckqualität eines Druckerzeugnisses sowie Vorrichtung zu dessen Durchführung
US4288781A (en) * 1978-11-13 1981-09-08 The Perkin-Elmer Corporation Currency discriminator
US4348656A (en) * 1979-10-16 1982-09-07 Ardac, Inc. Security validator
US4513439A (en) * 1982-07-12 1985-04-23 Ardac, Inc. Security validator
WO1991009380A1 (de) * 1989-12-20 1991-06-27 Care Tec Gmbh Vorrichtung zur klassifizierung von banknoten u.dgl.
US5201395A (en) * 1990-09-27 1993-04-13 Oki Electric Industry Co., Ltd. Bill examination device
US20030009420A1 (en) * 2001-07-05 2003-01-09 Jones John E. Automated payment system and method
US20030059098A1 (en) * 2001-09-27 2003-03-27 Jones John E. Document processing system using full image scanning
US6603872B2 (en) 1996-05-13 2003-08-05 Cummins-Allison Corp. Automated document processing system using full image scanning
US20040007806A1 (en) * 2002-04-11 2004-01-15 Nobutaka Suzuki Sheet feeding apparatus and image forming apparatus
US7000828B2 (en) 2001-04-10 2006-02-21 Cummins-Allison Corp. Remote automated document processing system
US7349566B2 (en) 1997-04-14 2008-03-25 Cummins-Allison Corp. Image processing network
US7619721B2 (en) 1996-11-27 2009-11-17 Cummins-Allison Corp. Automated document processing system using full image scanning
US7778456B2 (en) 1995-05-02 2010-08-17 Cummins-Allison, Corp. Automatic currency processing system having ticket redemption module
US7903863B2 (en) 2001-09-27 2011-03-08 Cummins-Allison Corp. Currency bill tracking system
US7929749B1 (en) 2006-09-25 2011-04-19 Cummins-Allison Corp. System and method for saving statistical data of currency bills in a currency processing device
US7946406B2 (en) 2005-11-12 2011-05-24 Cummins-Allison Corp. Coin processing device having a moveable coin receptacle station
US7980378B2 (en) 2006-03-23 2011-07-19 Cummins-Allison Corporation Systems, apparatus, and methods for currency processing control and redemption
US8162125B1 (en) 1996-05-29 2012-04-24 Cummins-Allison Corp. Apparatus and system for imaging currency bills and financial documents and method for using the same
US8204293B2 (en) 2007-03-09 2012-06-19 Cummins-Allison Corp. Document imaging and processing system
US8391583B1 (en) 2009-04-15 2013-03-05 Cummins-Allison Corp. Apparatus and system for imaging currency bills and financial documents and method for using the same
US8417017B1 (en) 2007-03-09 2013-04-09 Cummins-Allison Corp. Apparatus and system for imaging currency bills and financial documents and method for using the same
US8428332B1 (en) 2001-09-27 2013-04-23 Cummins-Allison Corp. Apparatus and system for imaging currency bills and financial documents and method for using the same
US8433123B1 (en) 2001-09-27 2013-04-30 Cummins-Allison Corp. Apparatus and system for imaging currency bills and financial documents and method for using the same
US8437528B1 (en) 2009-04-15 2013-05-07 Cummins-Allison Corp. Apparatus and system for imaging currency bills and financial documents and method for using the same
US8437529B1 (en) 2001-09-27 2013-05-07 Cummins-Allison Corp. Apparatus and system for imaging currency bills and financial documents and method for using the same
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USRE44252E1 (en) 2002-01-10 2013-06-04 Cummins-Allison Corp. Coin redemption system
US8459436B2 (en) 2008-10-29 2013-06-11 Cummins-Allison Corp. System and method for processing currency bills and tickets
US8478020B1 (en) 1996-11-27 2013-07-02 Cummins-Allison Corp. Apparatus and system for imaging currency bills and financial documents and method for using the same
US8538123B1 (en) 2007-03-09 2013-09-17 Cummins-Allison Corp. Apparatus and system for imaging currency bills and financial documents and method for using the same
US8627939B1 (en) 2002-09-25 2014-01-14 Cummins-Allison Corp. Apparatus and system for imaging currency bills and financial documents and method for using the same
US8929640B1 (en) 2009-04-15 2015-01-06 Cummins-Allison Corp. Apparatus and system for imaging currency bills and financial documents and method for using the same
US8944234B1 (en) 2001-09-27 2015-02-03 Cummins-Allison Corp. Apparatus and system for imaging currency bills and financial documents and method for using the same
US8950566B2 (en) 1996-05-13 2015-02-10 Cummins Allison Corp. Apparatus, system and method for coin exchange
US9141876B1 (en) 2013-02-22 2015-09-22 Cummins-Allison Corp. Apparatus and system for processing currency bills and financial documents and method for using the same
US9818249B1 (en) 2002-09-04 2017-11-14 Copilot Ventures Fund Iii Llc Authentication method and system

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
IT1068657B (it) * 1976-11-03 1985-03-21 Nuovo Pignone Spa Metodo perfezionato per il controllo di banconote ed apparecchiature per realizzarlo
JPS58175091A (ja) * 1982-04-06 1983-10-14 株式会社東芝 セキユリテイ・ストレツド検出装置
SE455547B (sv) * 1982-06-29 1988-07-18 Bergstroem Arne Apparat for ekthetskontroll av sedlar

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US2922893A (en) * 1954-10-15 1960-01-26 Philco Corp Document identifying system
US3239814A (en) * 1962-02-14 1966-03-08 Lionel Electronics Lab Inc Document testing and identification system
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US3488511A (en) * 1966-10-25 1970-01-06 Tokyo Shibaura Electric Co Automatic identifying apparatus of postage stamp indications

Cited By (108)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2311364A1 (fr) * 1975-05-13 1976-12-10 Glory Kogyo Kk Appareil d'identification de billets de banque
US4041456A (en) * 1976-07-30 1977-08-09 Ott David M Method for verifying the denomination of currency
US4179685A (en) * 1976-11-08 1979-12-18 Abbott Coin Counter Company, Inc. Automatic currency identification system
US4288781A (en) * 1978-11-13 1981-09-08 The Perkin-Elmer Corporation Currency discriminator
EP0012724A1 (de) * 1978-12-18 1980-06-25 GRETAG Aktiengesellschaft Verfahren zur maschinellen Beurteilung der Druckqualität eines Druckerzeugnisses sowie Vorrichtung zu dessen Durchführung
US4348656A (en) * 1979-10-16 1982-09-07 Ardac, Inc. Security validator
US4513439A (en) * 1982-07-12 1985-04-23 Ardac, Inc. Security validator
WO1991009380A1 (de) * 1989-12-20 1991-06-27 Care Tec Gmbh Vorrichtung zur klassifizierung von banknoten u.dgl.
US5201395A (en) * 1990-09-27 1993-04-13 Oki Electric Industry Co., Ltd. Bill examination device
US7778456B2 (en) 1995-05-02 2010-08-17 Cummins-Allison, Corp. Automatic currency processing system having ticket redemption module
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Also Published As

Publication number Publication date
FR2111588A5 (de) 1972-06-02
DE2150910A1 (de) 1972-04-27
CH555071A (de) 1974-10-15
GB1361420A (en) 1974-07-24

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