JPS59169586A - Discriminator for printing - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a printed matter discriminating device that determines whether a banknote is genuine or not, whether it is good or bad, whether it is overlapping, etc., by detecting the thickness of the banknote, for example.

[Technical background of the invention and its problems]

For example, as a general means of distinguishing deposits and overlapping marks on banknotes, the presence or absence of specular reflection, overlapping, etc., is determined by the amount of transmitted light when pasting tape. However, the former method is ineffective against dull tapes, and the latter method is easily affected by printed patterns and has the drawback of not being accurate.

On the other hand, as another general means, there is a discrimination device as shown in FIG. 1, for example. In the figure, 1 is a fixed roller provided on the conveyance path of banknotes P, 2 is a movable roller that rolls into contact with this fixed roller 1 and moves up and down with shaft 3 as a fulcrum, and 4 is a movable roller that moves up and down in synchronization with this movable roller 2. Moving metal lever, 5
is a metal sensor whose output changes as the metal lever 4 approaches. When the banknote P is conveyed and passes between the fixed roller 1 and the movable roller 2, if the banknote P has a normal thickness, the thickness signal obtained by amplifying the output signal of the sensor 5 with the amplifier 6 is as shown in FIG. Va as shown in . on the other hand,
Figure 2 shows this. Therefore, a binarization level Vth is provided, and the abnormal thickness signal vb is converted into a binarized signal by the binarization circuit 7, and the time, that is, the length tb of the binarized signal is set to a constant value tl r t2. On the other hand, if tl≦tbJ, it is determined that the banknotes are duplicates or different types of banknotes, and if t1≦Lb≦t2, it is determined that the banknotes are taped.

By the way, in recent years, techniques for counterfeiting (or altering) banknotes include pasting together high-value banknotes and low-value banknotes to create new high-value banknotes, or cutting out parts of multiple banknotes of the same denomination and modifying them with other paper. , parts of cut-out banknotes are pasted together to create a new banknote.

The banknotes forged in this way are shown in Figure 3(d).

As shown in (e) and (f), tape is often pasted vertically, in yellow, or diagonally. On the other hand, banknotes that have been torn or torn due to an accident are shown in Figure 3 (
As shown in a), (b), and (c), there are many cases in which parts have been partially corrected with tape or the like. therefore,
If there is tape attached as shown in Figure 3 (a), (b), and (e), it is considered a damaged banknote, and as shown in Figure 3 (d).
, (e).

If tape or the like is attached as in (f), it is necessary to identify each banknote as a counterfeit banknote.

However, the conventional discrimination device shown in FIG. 1 cannot distinguish between damaged banknotes and counterfeit banknotes as shown in FIG. 3. This is because the thickness signals of damaged banknotes and counterfeit banknotes are the same, as shown in FIG. 3, which shows the thickness signals obtained from each banknote. In addition, in the above-mentioned thickness signal, ST is a tape thickness signal part, and SP is a banknote thickness signal part. If the thickness of the tape attached is close to the thickness of the banknote, it will be difficult to distinguish it from a stacked banknote. That is, in the example shown in Figure 3, (a) and (
Regarding d) d: Damaged banknotes and counterfeit banknotes, (b) and (e)
Regarding Ushitake (c) and (f), it is difficult to distinguish between damaged banknotes, counterfeit banknotes, and overlapping banknotes, and the disadvantage is that they lack reliability. 3 [Object of the Invention] The present invention has been made in view of the above circumstances, and its purpose is to determine the authenticity, etc. of printed matter to be determined.
It is an object of the present invention to provide a highly reliable printed matter discriminating device that can perform discrimination with high precision.

[Summary of the invention]

The printed matter discrimination device according to the present invention uses a plurality of thickness sensors arranged in a direction perpendicular to the conveying direction of the printed matter to be discriminated.
Thickness signals from multiple locations on the printed matter to be determined are extracted, abnormal thickness signals are discriminated from among these thickness signals, continuous abnormal thickness in the diagonal direction of this abnormal thickness signal is detected, and based on this plugging result, the determined printed matter is detected. It is designed to judge whether something is true or false.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 4, a banknote P is held and conveyed by a conveyor belt 11 in the direction of the arrow shown in the figure. Then, the conveyor belt 1
1, a fixed roller 12 is disposed in a direction perpendicular to the conveyance direction, and five thickness sensors 13 are placed on the fixed roller 12 facing each other. ~135 are arranged at predetermined intervals. The thickness sensor 131=135 is
For example, it is configured as shown in FIG. That is, a movable roller 142 that rolls on the fixed roller 12 and a magnetic body 143 are integrally attached to one end of the lever 14, and the other end of the lever 141 is fixed. A magnetoresistive element 144 is provided at a portion facing the magnetic body 143 at a predetermined angle of 7°G.

The resistance value of this magnetoresistive element 144 changes as the gap G changes.

As the banknote P passes between the fixed roller 12 and the movable roller 143, a change in the thickness of the banknote P is transmitted to the lever 141 via the movable roller 143, thereby changing the gap G. do. Therefore, the change in the thickness of the banknote P is proportional to the change in the resistance value of the magnetoresistive element 144.

This change in resistance value is converted into an electrical signal by an amplifier circuit, which will be described later, and becomes a thickness signal.

Returning to FIG. 4, in front of the fixed roller 120, a bill P tip detector 15 consisting of a light source and a light receiving element is provided, and the tip detection signal ST obtained from this detector 15 is used to generate a control signal. is supplied to circuit 16. The control signal generation circuit 16 generates a rear signal CR, a detection r-to signal GA, and a pulse signal CK, respectively, as shown in FIG. It is something that generates. The clear signal CR is generated at the tip of the banknote P and clears all the circuits. Also,
The detection dirt signal GA is generated inside the front end and rear end of the banknote P. Further, the pulse signal CK is created to have a period proportional to its length, for example, one pulse corresponds to 1 mn+.

Thus, each output of the thickness sensors 131 to 135 is supplied to an amplifier circuit 18, where each banknote P
It is converted into a thickness signal 8l-8S proportional to the thickness of . Figure 6 shows detection points HD by each thickness sensor 131 to 135.
,~HD.

and one of those thickness signals, Sl. This thickness signal 8
1, the level vl is the thickness of the banknote P, the level V2 is the thickness when there is an adhesion such as the tape T, and the level v3 is the thickness of the banknote P.
is the thickness when there is a thinner area due to peeling of printing etc. The thickness level V2 is compared with an overthickness detection level vh, which is larger than the thickness level v1 of the banknote P, in the analog comparison circuit 191, and is detected as an overthickness signal 8hx. Further, the thickness level ■3 is compared with the too-thin detection level vn, which is smaller than the thickness level v1 of the banknote P, in the analog comparison circuit 192, and is detected as the too-thin signal Sn. Similarly,
Too thick signal Sh2~ from other thickness signals S2~S5
Sh5 and too thin signals Sn2 to Sn5 are detected by comparison circuits 191 and 192.

The lengths of the over-thickness signals 5hl-8h5 thus detected are measured. This measurement circuit 20 includes the control signal generation circuit 1
Clear signal CR output from 6.

The continuous length of excessive thickness is measured using the dart signal Q A 1z # Lux signal CK, and is constituted by first and second measuring circuits 201 and 202 as shown in FIG. 7, for example. The first measuring circuit 201 receives an excessively thick signal sh,
-Overlapping multi-signal OLh and counterfeit signal 5USh from 8hs
, and as shown in FIG. 8, an AND circuit 31 which takes the AND of the thick gap signals sh,
A counter circuit 3 to which the output of the AND circuit 31 is supplied
23. 32. , counter circuits 323 to 327 to which too-thick signals Shi to Shs are supplied, respectively, and an OR circuit 33 that takes the OR of each output of the counter circuits 322 to 327. The counterfeit signal 5USh1 is obtained from the signal OLh and the output of the OR circuit 33, respectively. Note that the counter circuit 321 has setting and setting data LOL.
, counter circuit 322 is supplied with setting data Ls1%, and counter circuits 323-327 are supplied with setting data LB2, respectively. These setting data LOL a Lst
+LS2 is the judgment length value.

As shown in FIG. 9, the counter circuits 321 to 327 include an AND circuit 34 which takes the AND of the pulse signal CK and the dirt signal GA, and a down counter to which the output CK' of the AND circuit 34 is supplied to a clock terminal. 35. This power,
1 from Unta 35? It is constituted by a latch circuit 36 to which a clock terminal is supplied with a low signal BO. In addition,
The load terminal of the counter 35 is supplied with a signal SIG corresponding to the too thick signal, and the data terminal is supplied with setting data (
LoLr Ls+ r Lsz + LA) is supplied. This counter circuit operates as follows.
The tamping chart is shown in FIG. That is,
The clear signal CR clears the counter 35 and the latch circuit 36, and the AND circuit 34 outputs a clock pulse C to the counter 35 using the dart signal GA and the norse signal CK.
Make K'. The counter 35 continues to load the setting data while the signal SIG corresponding to the too-thick signal is at the "0" level, counts down the setting data when it reaches the "1" level, and starts counting down when the count reaches "o". Generates signal BO. If the signal SIG is "'0" during counting
When the level is reached, the counter 35 loads the setting data again, and then counts down again when the signal SIG reaches the ``1'' level. The output (Q) of the latch circuit 36 is set to the 1" level by the plow signal BO. This counter circuit sets the value of the excessively thick continuous length to be detected in the setting data. In addition, if the continuous thickness exceeds the set length, dirt signal G
It has the function of setting the final output to the Pa1'' level only when it exists within A.

Therefore, in the first measurement circuit 2ol, the lengths when the overthickness signals Sh1 to Sh5 simultaneously reach the '1'' level are set by the counter circuits 321 to 327 having the above-mentioned functions, the AND circuit 31, and the OR circuit 33. data LO
If it is over L, the overlapping signal OLh is at the "P" level,
Setting data LSI or more or thicker signal Shl
- If the length when any one of Sb2 reaches the "'1" level is equal to or greater than setting data L82, the counterfeit signal 5Ush
l becomes the ``1# level.''

On the other hand, the second measuring circuit 2o2 in FIG.
It detects the damage signal ABLh1 from 1 to Shs,
Counter circuits 371 to 375 to which too-thick signals S), -Sb2 are supplied, respectively; these counter circuits 371
It is composed of an OR circuit 38 which takes the OR of each output of 375, and a damage signal ABL is generated from the output of the OR circuit 38.
E, , is obtained. Note that setting data LA is supplied to the counter circuits 37° to 375, respectively. Further, the counter circuits 371 to 375 are configured as shown in FIG. 9 similarly to the counter circuits 321 to 327. Therefore, too thick signal Shl”
- If the length when one of the Shs reaches the "1" level is greater than or equal to the setting data LA, the output of the OR circuit 38;
The damage signal ABLh becomes '1' level.

Here, the above setting data LOL r LSI r L8
2 +LA is CLA≦LSI≦LOL≦Ll! 2] is in the room.

Therefore, as shown in FIG. 13(a), two or more overlapping banknotes P are treated as overlapped banknotes, and as shown in FIG. P1 or a banknote P on which a number 7'' Ti is affixed continuously parallel to the conveyance direction as shown in FIG. figure(
A banknote P to which tape T or the like is partially pasted as shown in d) is assumed to have been corrected for cuts or tears, and is detected as damaged.

Note that the first measuring circuit 201 in FIG. 7 may be modified as shown in FIG. 11. That is, too thick signals sh1 to S
Signal S at both ends of hs), 11 sh5 All 5 signals sh
Only signals 2 to Sh4 are supplied to the AND circuit 3. In order to do this, the conditions for overlapping detection are set as follows: among the too thick signals Sh1 to Shs, the center signals
sh4 at the same time °゛1n1n level length is setting data L
It is possible to set the overlapping signal OIL to the "l" level when the signal is equal to or higher than OL.
, ), even if the banknotes P with edge tears K overlap, they can be detected as overlapping sheets without any problem, and the first measuring circuit 20. - May be modified as shown in FIG. That is, the counter circuit 32. is replaced with five counter circuits 32nd to 3215, and too thick signals sh1 to s are applied to these counter circuits 3211 to 3215, respectively.
In addition to supplying h5, the counter circuits 3211 to 32
15 outputs are supplied to an OR circuit 39, and this OR circuit 3
The overlapping multi-signal OLh is obtained from the outputs of 9. By doing this, the conditions for detecting overlapping signals are set as follows: too thick signal Sh! - Overlapping multi-signal OL when the length at which any of the Shs reaches the 11” level is longer than the set data LOL
h can be set to the ``'1'' level. For this,
For example, even when bills P with holes H overlap as shown in FIG. 13(f), it can be detected as an overlap without any problem.

Returning to FIG. 4 again, the thickness clearance signal Sh1% Sh.

are respectively supplied to an overly thick cumulative length measuring circuit 21, where the overly thick cumulative length of the banknote P in the transport direction is measured. This measuring circuit 21 measures the cumulative length of excessive thickness using the clear signal CRX dirt signal Q A N /#rus signal CK output from the control signal generating circuit 16. For example, as shown in FIG. Too thick signal Sht~
It consists of an OR circuit 41 that takes the OR of sh5, and a counter circuit 42 to which the output of the OR circuit 41 is supplied, and the damage signal ABL is generated from the output of the counter circuit 42.
h2 is obtained.

Note that the counter circuit 42 is supplied with setting data ΣLA. Further, the counter circuit 42 has a function of /? as shown in FIG. An AND circuit 43 that takes the AND of the loose signal CK, the r□-to signal GA, and the signal SIG corresponding to the too thick signal, and an up counter 4 whose output CK' of the AND circuit 43 is supplied to the clock terminal.
4. The contents of this counter 44 are configured by a comparator 45 supplied with the setting data (ΣLA). This counter circuit operates as follows, and its timing chart is shown in FIG. That is, the clear signal CR clears the counter 44 and the AND circuit 43
generates a clock z4Jl/sCK'' to the counter 44 using the Noculus signal CK, r-) signal GA, and signal 8IG.While the signal SIG is at the 1'' level, the counter 44 outputs the too thick signal Shl. """ While any one of the ShS is at the '1' level, pulses CK' are counted and the count contents are supplied to the comparator 45.

The comparator 45 compares the contents of the counter 44 with the setting data, and sets the output to the l'' level if the contents of the counter 44 become equal to or larger than the setting data.

In this way, the excessively thick cumulative length measuring circuit 21 determines whether any of the excessively thick signals Sht -Shs is '' in the dirt signal GA.
When it reaches the l'' level, its length is cumulatively measured, and only when the cumulative thickness equal to or greater than the set length exists, the damage signal ABLh2-t''1' level is set. Therefore, it cannot be detected by the continuous length measuring circuit 2θ that is too thick (that is, the damage signal ABI411
It is possible to detect banknotes as damaged if they have fine wrinkles or numerous small deposits (such as those that do not reach the @1″ level).

Further, the excessively thick signals Sh1 to ShB are respectively supplied to the diagonally continuous excessively thick detecting circuit 22. This detection circuit 22
If Tezo pasting etc. are detected consecutively in each direction of 5hl-+Sh5 or Sh5→sh in too-thick signals Sh1 to Shs, it is possible that different types of banknotes were cut diagonally and pasted together. Therefore, in this case, the counterfeit banknotes and the counterfeit signal 5UShz are set to the "'1" level. For example, as shown in FIG. 17, the first and second detection circuits 221 and 22
It is composed of ゜. The first detection circuit 221 is connected to a tape T2 attached as shown in FIG. 18(,), for example.
The second detection circuit 222 is a circuit for detecting the attached tape T2 as shown in FIG. 18(b), but the basic configuration is the same. However, the input order of the too-thick signals Sh1 to Sh5 is different. In FIG. 17, 511 to 514 are differentiating circuits that generate pulses P1 to P4 at the fall of the excessively thick signals Sh1 to Sh4 from "l'to"0# level, respectively, and 521 to 524 and 531 to 534 are and circuit,
5゛4 is the in/out circuit, 55.56 is the OR circuit, 5
7 is a NOR circuit, and 581 to 585 are latch circuits (registers).

The operation shown in FIG. 17 will be described below with reference to the timing chart shown in FIG. 19. First, the latch circuits 581 to 585 are cleared by the real signal CR. Now, the first
When the tape 7°T1+T2 is pasted as shown in Fig. 8(a), first the too thick signal Sh1 is '0'' at the tape TtO.
+t 1 n level, the output (Ql) of the latch circuit 581 is set to the "1" level via the inverter circuit 54. Next, after passing through the chi fT1, the too-thick signal Shl changes from 1" to "0"0" level, and the differentiating circuit 511
A pulse P1 is generated from. At this time, too thick signal Sh
2 is at the "0" level, the output of the AND circuit 521 is not at the "0" level, so the latch circuit 582 is not set and its output (Q2) remains at the "0" level.

In addition, the output of the AND circuit 531 is also at the “0” level.
Therefore, latch circuit 581 is cleared via NOR circuit 57 and OR circuit 55. Next, at Chi 7'T2, first the too thick signal Sh1 is set to the output (Ql) of b581 to the 1" level. Next, the too thick signal Sh1 changes from "1" to II O) level. When this happens, if the too thick signal Sh2 is at the "1" level, the output of the AND circuit 521 is also at the "1" level, so the output (Q2) of the latch circuit 582 is "1".
set to level. At this time, the differentiating circuit 511 generates the pulse pi, but the AND circuit 53. Since the output of the AND circuit 52 is at the "1" level, the pulse P is
Do not pass 1. Therefore, the latch circuit 581 is not cleared as in the case of tape T1. Next, when the thickness signal Sh2 changes from ``'1'' to ``0# level,
When the too thick signal Sh3 is at the ``1'' level, the output of the AND circuit 52□ is also at the ``1'' level, so the output (Q3) of the latch circuit 583 is set to the 1'' level. In this way, the too-thickness signal Sh3 changes from 1"→"
At 0″0″ level, too thick signal Sh4 goes to 1″ level,
When the too-thick signal Sh4 goes from °゛1” to “o” level, if the too-thick signal Sh5 goes to “1” level,
Finally, the output (Q5) of the latch circuit 585 is "']"
Indicates that the tape is set at a level and too thick tape, such as continuous diagonal tape, has been detected. In addition, OR time @,
56 is the result of the first detection circuit 221 described above in FIG.
, ), and the detection result of tape pasting as shown in FIG. 18(b) by the second detection circuit 222, if either is detected, 1″
A level damage signal SUS h2 is output.

Returning to FIG. 4 again, the too-thin signal Snl''S...

are supplied to the continuous length measuring circuit 23, respectively.

This measuring circuit 23 measures the length when any of the too-thin signals Snl to So5 reaches the level ``1'' within the signal GA), and if it exceeds the set value, the Assuming that it is a banknote, the counterfeit signal 5USn is set to the "5"1" level. For example, as shown in FIG. 20, the thin gap signal 5nl-Sn.

counter circuits 61 . 615, and an OR circuit 62 that takes the OR of each output of these counter circuits 611 to 615, and an OR circuit 6 with
The counterfeit signal 5US1+ is obtained from the output of 2. Note that setting data LS3 is also supplied to the counter circuits 611 to 615, respectively. However, the counter circuits 61□ to 615 are circuits having the same function as the counter circuit shown in FIG. 9. Therefore, if the length when any one of the too-thin signals 5nl-8n5 approaches the IIIT level is set data, and it is 83 or more, the output of the OR circuit 62 is output. f, the counterfeit signal 5UST, 1 becomes the II I IT level.

The too-thin signals Sn1 to Sn5 are respectively supplied to the too-thin cumulative length measuring circuit 24. This measurement circuit 24 is
When either the too thin signal Sn or -Sn5 reaches the 1" level in the dirt signal GA, measure its cumulative length, and if it is equal to or greater than the set value, it is a counterfeit signal 5U.
For example, as shown in FIG. 21, an OR circuit 71 that takes the OR of the too thin signals Sn□ to Sn5 and a counter circuit 72 to which the output of the OR circuit 71 is supplied. The counter circuit 72 has a button to obtain the counterfeit signal 5USyH from the output of the counter circuit 72.The counter circuit 72 has setting data Σ
LS is supplied. However, the counter circuit 72 is a circuit having the same function as the counter circuit shown in FIG. 15. Therefore, in the dirt signal GA, if the cumulative length when one of the too-thin signals 5nl-8n5 reaches the "'1" level is equal to or greater than the setting data ΣLS, the output of the counter circuit 72, wife)
The counterfeit signal 5USn2 becomes It1'' level.

Here, the above-mentioned measurement of the continuous length of too thin can detect a different type of banknote that is thin all over without any thermal problem, but for example, as shown in FIG. 13(g), a regular banknote P is When a thin paper M of a different type is pasted with tape T or the like between the cutouts and the tape T, if this tape part comes off the thickness sensor, it cannot be detected by measuring the continuous length because it is too thick.
It has the effect of preventing this. Furthermore, the above-mentioned measurement of the cumulative length of too thin is intended to detect counterfeit banknotes that have partially and discontinuously thin parts.

Therefore, the overlapping signal OLh and counterfeit signal 5USh obtained by each circuit 20 to 24 as described above.

5UShz p 5trsnx l 5USy12,
The damage signals ABI41°ABLhz are respectively supplied to the comprehensive judgment circuit 25. This comprehensive judgment circuit 25 makes a final judgment based on each of the above-mentioned signals, and for example, the second
As shown in FIG. 2, it is composed of OR circuits 81 and 82, inverter circuits 83 and 84, and AND circuits 85 and 86. That is, the OR circuit 8 is a counterfeit signal 5US)1
If any one of 1 r 5UShz r 5USH1r 5Usnz is ``1'' level, the output will be ``''
Becomes 1# level. The OR circuit 82 outputs the damage signal ABLh.
1, ABLhz is at the "1" level, the output becomes the "1#" level. The inverter circuits 83, 84 and the AND circuits 85, 86 constitute a kind of priority circuit.

In other words, if the overlapping multi-signal oLh reaches the P1# level,
Other results are inhibited, and only the overlapping banknote signal OL is output at the 11" level as the final result. Also, if any counterfeit signal reaches the "1" level, any damaged signal is inhibited, and the final result is As a result, the counterfeit banknote signal S
Only US outputs at ``'1# level.Also, damage signal A
BLhl.

One of AB I4 and 2 must be at 11” level,
Only when the other detection signals are at the "0" level, only the damaged banknote signal ABL is output at the "'1# level" as the final result.

In the above embodiments, the case where the present invention is applied to a bill discriminating device has been described, but the present invention is not limited thereto, and can be applied to a discriminating device for printed matter other than bills, such as checks or securities.

〔Effect of the invention〕

As described in detail above, according to the present invention, an abnormal thickness signal is detected from the thickness signals of a printed matter to be determined obtained from a plurality of thickness sensors, and continuous abnormal thickness in an oblique direction is detected based on the abnormal thickness signal. Furthermore, it is possible to provide a printed matter discrimination device that can discriminate the authenticity of printed matter to be discriminated with high accuracy and obtain high reliability.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing a conventional discrimination device, FIG. 7 is a mental timing chart explaining the operation of FIG. 1, and FIG.
The figure shows examples of damaged banknotes and counterfeit banknotes. Figures 4 to 22 are for explaining one embodiment of the present invention. Figure 4 is an overall configuration diagram, and Figure 5 is a diagram showing the thickness. The configuration diagram of the sensor, Figure 6 is a diagram showing the detection points by the thickness sensor, their thickness signals and various control signals, Figure 7 is the configuration diagram of the thickness and continuous length measuring circuit, and Figure 8 is Figure 7. 1st in
FIG. 9 is a configuration diagram of the timer circuit in FIG. 8, FIG. 10 is a timing chart for explaining the operation of FIG. 9, and FIGS. 11 and 12 are diagrams of the timer circuit in FIG. 7. 1 is a configuration diagram showing a modified example of the measurement circuit.
The figure is a configuration diagram of the too-thick cumulative length measuring circuit, and Figure 15 is the 1st
Fig. 4 is a block diagram of the timer circuit, Fig. 16 is a timing chart for explaining the operation of Fig. 15, Fig. 17 is a block diagram of the diagonal direction continuous excessive thickness detection circuit, and Fig. 18 is a diagram of the timer circuit when the tape etc. is in the diagonal direction. A diagram showing examples of banknotes affixed to
Fig. 19 is a timing chart for explaining the operation of Fig. 17, Fig. 20 is a block diagram of the too-thin continuous length measuring circuit, Fig. 21 is a block diagram of the too-thin cumulative length measuring circuit, and Fig. 22 is a block diagram of the too-thin continuous length measuring circuit.
The figure is a block diagram of the comprehensive judgment circuit. P... Banknote (printed matter to be discriminated), 11... Conveyor belt, 131-135... Thickness sensor, 16... Control signal generation circuit, 191 + 792... Analog comparison circuit, 20... Too thick continuous length measurement circuit, 21...
Too thick cumulative length measuring circuit, 22... diagonal direction continuous too thick detecting circuit, 23... too thin continuous length measuring circuit, 24
. . . Thin strip cumulative length measuring circuit, 25 . . . Comprehensive judgment circuit, 581 to 585 . . . Latch circuit (register). Representative Patent Attorney Kensuke Norichika (and 1 other person) Figure 1 Figure 2 @ Figure 3 (a) (b) (c) Figure 8 Lnl Figure 9 Figure 10 Q: Figure 13 Figure 14 Fig. 15 Fig. 16 A≧B--1--f-1 Fig. 18 Fig. 20 1e+ Fig. 19 Fig. 21

Claims (2)

[Claims] (1) n (n = 1
．． 2, 3. ...) n thickness sensors that obtain thickness signals at locations, a discriminator that discriminates abnormal thickness signals from each thickness signal from these thickness sensors, and a continuous abnormal thickness in an oblique direction based on the output of this discriminator. The detecting means includes a detecting means for detecting, and a determining means for determining the authenticity of the printed material to be discriminated based on the detection result of the detecting means, and the detecting means has n storage means respectively corresponding to the n thickness sensors. When the abnormal thickness signals from each of the n thickness sensors are successively discriminated in the order of 1 to n, these storage means are set to 7m times in the order of 1 to n, and the abnormal thickness signals are set to 7m times in the order of 1 to n. The printed matter is configured such that if it is continuous or even one is not discriminated, all are cleared, and when the n-th memory means is finally set, it becomes continuous abnormal thickness in the diagonal direction. Discrimination device. (2) The printed matter discriminating device according to claim 1, wherein the abnormal thickness is thicker than the average thickness.