JP2011028531A - Magnetic ink character reading apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic ink character reading apparatus that reconciles the reading speed of a magnetic ink character reading apparatus using a single-track magnetic sensor and the reading reliability of the magnetic ink character reading apparatus using a multi-track magnetic sensor. <P>SOLUTION: The magnetic ink character reading apparatus has magnetic ink character reading functions given by a single-track magnetic sensor and a multi-track magnetic sensor. The single-track magnetic sensor and the multi-track magnetic sensor are used selectively according to a situation for reading magnetic ink characters. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a magnetic ink character reading device that reads magnetic character information from a document such as a bill.

  In order to sort and organize securities such as bills and checks (hereinafter collectively referred to as bills), a general method is to magnetically or optically read MICR characters printed with magnetic ink at predetermined positions on bills. Has been done.

For example, a financial institution such as a bank performs classification based on banks, accounts, amounts, payment dates, etc. by reading MICR characters printed on bills. The bills classified by type are brought to the bill exchange. Instead, they bring their own bills brought from other banks to the bill exchange office, classify them in the same way for each branch and account, and process them accordingly.

Such a series of bill processing must be performed in about one day before the bill is received from the user and the processing is completed, and is a task requiring quick processing. For this reason, many banks do not process bills at each branch, but have a department (for example, a centralized center) that specializes in bills. In the centralized center, a relatively large MICR character reader for exclusive use of bills is introduced and processed in order to process a large amount of bills at a high speed.

However, in recent years, with the development of communication technology, individual information including bill image information and MICR character information is captured as an electronic file by an image reader at each branch, and the electronic file is transmitted to the central center first. However, the business form has changed so that payment processing of the amount of money is completed based on the individual information of the electronic file.

If processing is performed using electronic data in this way, bills received from customers do not need to be collected in the centralized center on the same day, so the centralized center and each branch have been reciprocated many times a day. Banks can reduce bill handling and reduce bill processing costs. In addition, since the bills can be processed before reaching the centralized center, the processing can be performed quickly. Therefore, it is required to accurately read the MICR characters printed on the bill in order to realize such a business form smoothly and without hindrance.

For this reason, various techniques related to MICR character reading have been proposed. For example, Patent Document 1 describes a solution when the level of a magnetic read signal obtained by a magnetic sensor is uniformly increased or decreased. Yes. Further, for example, Patent Document 2 describes a method for solving a problem caused by aging of a bill and a difference in print quality.

Japanese Examined Patent Publication No. 3-37230 JP 2004-310346 A

  However, the magnetic ink character reading device has a sufficiently reliable level of MICR character magnetic reading signal, but does not match the actual character (misread), or cannot determine the character for some reason ( Unread) is a problem.

A normal magnetic ink character reading device compares characters held in a dictionary table with magnetic data detected by a single track magnetic sensor, thereby determining characters and outputting the result. FIG. 4 shows an example of a magnetic waveform when “2” and “5”, which are part of the E13B font, are read by a normal single-track magnetic sensor. The waveform indicated by the solid line is the waveform “2”, and the waveform indicated by the dotted line is the waveform “5”. The vertical axis represents the output voltage value, and the horizontal axis represents the passage of time. The magnetic ink character reading device obtains a recognition result by analyzing the waveform as shown in FIG. Incidentally, “2” and “5” shown in FIG. 4 are known as characters having very similar waveforms in E13B. The only difference between these two waveforms is the difference in the time axis of the peak positions (ridges and valleys). The magnetic ink character reading device compares the time axis difference and outputs a recognition result.

However, when the conveyance speed is reduced during the reading of “2”, the magnetic waveform of “2” is very different from the magnetic waveform of “5” in the peak position (ridges and valleys) as shown in FIG. Similar waveform. Accordingly, when the magnetic reading waveform of “2” extended as shown in FIG. 5 due to the speed fluctuation is obtained, the magnetic ink character reading device determines that it is the character of “5” although it is the character of “2”. Misreading occurs. Similarly, when the conveyance speed increases during reading “5”, there is a possibility that the character “2” is misread.

Next, an example in which unreading occurs in the magnetic ink character reading device will be described below. Similar to the above-described example of misreading, if the conveyance speed fluctuates during character reading, the peak position of the obtained magnetic waveform fluctuates. Since the magnetic ink character reader analyzes the peak position of the magnetic waveform and discriminates the character, it is unread if there is no data that matches the obtained magnetic waveform in the data held in the dictionary data. .

In order to solve the problem of misreading and unreading, a plurality of magnetic sensors are arranged perpendicular to the bill conveyance direction, and the scanning width of each magnetic sensor is composed of a single track magnetic sensor. Assuming that each magnetic sensor partially scans the MICR characters with a smaller size than that of FIG. 6, FIG. 6A shows a magnetic waveform of “2”, and FIG. Become. When the magnetic waveforms read by the respective magnetic sensors are compared, it can be seen that there are different characteristics. Although it is considered that characters can be distinguished from these features, character discrimination processing is performed as many as the number of magnetic sensors, which may increase the processing time required for the discrimination and reduce the reading processing speed of the magnetic ink character reader There is.

An object of the present invention is to provide a magnetic ink character reading device capable of accurately reading magnetic information printed on a bill. Another object is to provide a high-speed magnetic ink character reading device.

In order to achieve the above object, a magnetic ink character reader according to the present invention detects conveyance means for conveying a sheet to a conveyance path and magnetic printing information printed on the sheet conveyed to the conveyance path. First detection means having a single magnetic sensor for detection, second detection means having a plurality of magnetic sensors for detecting the magnetic printing information, and whether to perform detection by the second detection means It has a judging means for judging based on the detection result of the first detecting means.

  The magnetic ink character reader according to the present invention includes a conveying means for conveying a sheet to a conveying path, and a single magnet for detecting magnetic printing information printed on the sheet conveyed to the conveying path. Which of the first detection means having a sensor, the second detection means having a plurality of magnetic sensors for detecting the magnetic print information, the detection by the first detection means, and the detection by the second detection means It is characterized by having a judgment means for judging whether to do based on user setting.

  According to the present invention, since magnetic ink characters are discriminated by a plurality of magnetic sensors, it is possible to reduce misreading / unreading when reading magnetic ink characters. In addition, when both the first detection means using a single magnetic sensor and the second detection means using a plurality of magnetic sensors are provided, discrimination from the detection means by a single magnetic sensor due to fluctuations in the conveyance speed, etc. Even if there is a high possibility of misreading / unreading, it can be set to detect using a plurality of magnetic sensors, and misreading / unreading when reading magnetic ink characters can be reduced.

In addition, when the determination is performed using both the first detection unit using a single magnetic sensor and the second detection unit using a plurality of magnetic sensors, erroneous reading / unreading when reading magnetic ink characters can be reduced. In addition, the processing can be performed at a reading speed close to the detection by the first detection means using a single magnetic sensor.

It is a figure which shows the structure and scanning width | variety of a magnetic sensor. It is a perspective view which shows the external appearance of a magnetic ink character reader. It is a block diagram which shows the structure of the conventional magnetic ink character reading process part. It is a figure which illustrates the magnetic waveform of "2" and "5" read by a single magnetic sensor. It is a figure which illustrates the magnetic waveform read by the single magnetic sensor when the fluctuation | variation of a conveyance speed occurs. It is a figure which illustrates the magnetic waveform of "2" read by six magnetic sensors arrange | positioned orthogonally with respect to the conveyance direction. It is a figure which illustrates the magnetic waveform of "5" read by the six magnetic sensors arrange | positioned orthogonally with respect to the conveyance direction. It is a figure which shows the character list of E13B font. It is a block diagram which shows the structure of the magnetic ink character reading process part of this invention. It is a figure which illustrates a bill. It is a flowchart showing a series of operation | movement in Example 1 of this invention. It is a flowchart showing a series of operation | movement in Example 2 of this invention.

  Embodiments of the present invention exemplified below will be described with reference to the drawings. In the following examples, MICR characters (magnetic printing information) are described as E13B fonts. FIG. 7 shows a list of characters in the E13B font.

FIG. 2 is a perspective view showing the appearance of the first embodiment of the magnetic ink character reader according to the present invention. The magnetic ink character reader 1 is provided with a hopper 2 for stacking bills (sheets). Reference numeral 3 denotes a conveyance path for conveying the bill, which is formed in a groove shape from the hopper portion 2 to the discharge port 4. The bills loaded on the hopper 2 pass through the transport path 3 one by one by a transport mechanism (not shown), and magnetic information is read by a magnetic sensor provided in the transport path. Two discharge ports 4 are provided, and the bills are distributed to the two discharge ports 4 in accordance with a distribution condition indicating whether or not the MICR characters can be read normally. The magnetic ink character reading device 1 is connected to the host PC 5 via a cable 6 such as a USB cable or a SCSI cable.

FIG. 8 is a block diagram showing the configuration of the magnetic ink character reading processing unit of the present invention. On the conveyance path 3, the paper detection sensor 10, the permanent magnet 100, the magnetic sensor 101, and the six magnetic sensors 201 a to 201 f arranged as shown in FIG. ing. The conveyance direction D indicates the conveyance direction of the bill 90. As the magnetic sensor 101 and the magnetic sensors 201a to 201f, a magnetic head, a magnetoresistive element, a magnetic impedance element, a Hall element, or the like can be used. The permanent magnet 100 is for adjusting the magnetization direction of the MICR characters read by the magnetic sensor 101 and the magnetic sensors 201a to 201f, and the conveyance path 3 is set in the magnetization direction that improves the S / N ratio of the magnetic signal as much as possible. The magnetization of the MICR characters printed on the bill 90 that has been conveyed is aligned. Since the permanent magnet 100 is intended to magnetize MICR characters, an electromagnet may be used. FIG. 9 shows an example of a bill. On the bill 90, as shown in FIG. 9, MICR characters and the like are printed in a predetermined area 91 by magnetic ink or magnetic toner.

The magnetic ink character reading operation according to the embodiment of the present invention will be described with reference to the flowchart of FIG. This processing is realized by software executed by a CPU (not shown) that controls the magnetic ink character reading device, but part or all of the processing may be realized by hardware. First, when a bill reading instruction is issued from the host PC 5 via the cable 6, this processing is started. When reading a bill, the user recognizes MICR characters using a single magnetic sensor with emphasis on the reading processing speed, or uses multiple magnetic sensors with emphasis on the reliability of the read characters. It is assumed that the user sets whether to perform MICR character recognition. When this processing is started, the bill 90 is transported by a transport means (not shown) on the transport path 3 and the leading edge of the bill 90 is detected by the paper detection sensor 10.

The CPU (not shown) of the magnetic ink character reading device 1 that has started processing uses a single magnetic sensor (first detection means) 101 based on setting information set by the user on the host PC 5 or a plurality of magnetic sensors ( In step S1001, whether or not to use (second detection means) 201a to 201f is determined (determination means), and if it is set to use a single magnetic sensor, the processing of steps S1002 to S1004 is performed, and a plurality of magnetic sensors are If the setting is to be used, the process branches to perform steps S1005 to S1007.

First, processing when the user sets to use a single magnetic sensor will be described. When the conveyed bill 90 passes through the permanent magnet 100, the MICR characters are magnetized, and then reaches the magnetic sensor 101. In step S1002, the magnetic sensor 101 such as a magnetic head detects a change in magnetic flux that occurs when the MICR characters printed on the bill 90 pass, and amplifies the output signal output corresponding to the change in the magnetic flux. Processing, filter processing, and AD conversion are performed by the magnetic data processing unit 102, and the magnetic data after AD conversion is held by the magnetic data determination unit (first detection unit) 301. A sensor such as a magnetic impedance element produces an output signal that is substantially proportional to the amount of magnetic flux. However, the output signal can be differentiated to match the output signal waveform of a magnetic head or the like that is an output signal corresponding to the change in magnetic flux. Alternatively, the waveform as it is may be compared with a reference waveform for a sensor such as a magnetic impedance element.

In step S1003, the magnetic data after AD conversion from the magnetic data processing unit 102 based on the output signal of the magnetic sensor 101 held in the magnetic data determination unit 301 in step S1002 is segmented for each character. The method of segmenting each character utilizes the fact that the signal corresponding to the leading end of the character always starts from the positive peak as in the method of reading the leading end of the character of the E13B font disclosed in Japanese Patent Laid-Open No. 03-216781, for example. Then, there is a method of detecting the beginning of the character and further calculating the character width from the sampling period. However, other methods may be used for character separation.

In step S1004, a CPU (not shown) (comparison means, discrimination means) discriminates characters by comparing the magnetic data segmented for each character in step S1003 with the data held in the dictionary table 302. Each character of the E13B font used in this embodiment is configured such that when the waveform obtained when read by the magnetic sensor is divided into eight equal parts, the peak position of the magnetic waveform exists in different blocks. . Therefore, the character is discriminated by dividing the width of one character divided into eight equal parts with respect to the time axis, and comparing with which block the peak position of the magnetic waveform exists in the dictionary table 302. Is used.

In step S1008, the determination result from the magnetic data determination unit 301 is output. In step S1009, the bill 90 is distributed to the two paper discharge ports depending on whether or not the MICR characters have been normally read, and the reading process is terminated.

Next, processing in a case where setting is made to use a plurality of magnetic sensors (second detection means) 201a to 201f will be described. When the conveyed bill 90 passes through the permanent magnet 100, the MICR characters are magnetized, and after passing through the magnetic sensor 101, reaches the magnetic sensors 201a to 201f.

In step S1005, a change in magnetic flux that occurs when the MICR characters printed on the bill 90 pass is detected by a plurality of magnetic sensors 201a to 201f, and an amplification process is performed for each change in magnetic flux detected by each magnetic sensor. Filter processing and AD conversion are performed by the magnetic data processing units 202a to 202f, and each data after AD conversion is held by the magnetic data determination unit (second detection means) 301. In step S1006, the AD-converted magnetic data from the magnetic data processing units 202a to 202f based on the output signals of the magnetic sensors 201a to 201f held in the magnetic data determination unit 301 in step S1005 are segmented for each character. For character-by-character segmentation, processing similar to that described in step S1003 is performed on each magnetic data.

In step S1007, a CPU (not shown) (comparison means, discrimination means) discriminates characters by comparing each magnetic data segmented for each character in step S1006 with data held in the dictionary table 302. In the character discrimination method, the following processing similar to that described in step S1004 is performed on each magnetic data.

FIG. 6 shows an example of a magnetic waveform obtained from each magnetic sensor when “2” and “5” are read when six magnetic sensors are arranged orthogonal to the transport direction. FIG. 6A shows the magnetic waveform “2” and FIG. 6B shows the magnetic waveform “5”. It can be seen that the magnetic waveforms read by the respective magnetic sensors have different characteristics.

Specifically, the magnetic waveform of “2” includes the first peak of the magnetic waveform obtained from the magnetic sensor 201a (g point in FIG. 6A) and the first peak of the magnetic waveform obtained from the magnetic sensor 201e. The position of the time axis (point i in FIG. 6A) is the same, and the position of the time axis of the first peak (point h in FIG. 6A) of the magnetic waveform obtained from the magnetic sensor 201b is Different from g and i points. On the other hand, the magnetic waveform “5” has the first peak of the magnetic waveform obtained from the magnetic sensor 201a (point j in FIG. 6B) and the first peak of the magnetic waveform obtained from the magnetic sensor 201b ( The position of the time axis at the point k in FIG. 6B is the same, and the position of the time axis at the first peak of the magnetic waveform obtained from the magnetic sensor 201e (point l in FIG. 6A) is j. And different from k point. As described above, when reading with a plurality of magnetic sensors, characteristics of a magnetic waveform different from the case of reading with a single magnetic sensor appear, and accurate reading becomes possible.

In step S1008, the determination result from the magnetic data determination unit 301 is output. In step S1009, the bill 90 is distributed to the two paper discharge ports depending on whether or not the MICR characters have been normally read, and the reading process is terminated.

In this way, in the magnetic ink character reader that can recognize the MICR characters from the single magnetic sensor 101 and the MICR characters from the plurality of magnetic sensors 201a to 201f, perform the MICR character recognition from the magnetic sensor 101, or magnetically Magnetic ink that allows the user to arbitrarily set whether to perform processing that places importance on reading processing speed or processing that places importance on the reliability of read characters by setting whether to perform MICR character recognition from the sensors 201a to 201f A character reader can be realized.

The magnetic ink character reading operation according to the second embodiment of the present invention will be described with reference to the flowchart of FIG. The basic configuration of the magnetic ink character reading device 1 is the same as that of the first embodiment.

  First, when there is a bill reading instruction from the host PC 5 via the cable 6, the magnetic ink character reading device 1 starts this processing. The magnetic ink character reading device 1 that has started processing conveys the bill 90 by a conveyance means (not shown) on the conveyance path 3. The leading edge of the bill 90 is detected by the paper detection sensor 10, and the MICR character is magnetized when passing through the permanent magnet 100, and then the bill 90 reaches the magnetic sensor 101. Next, the magnetic sensor 101 detects a change in the magnetic flux that occurs when the MICR characters printed on the bill 90 pass, and an output process corresponding to the change in the magnetic flux is amplified, filtered, The AD conversion is performed by the magnetic data processing unit 102, and the data after the AD conversion is held by the magnetic data determination unit 301 in step S2001. As in the modification described in the first embodiment, a magnetic sensor that generates an output signal that is substantially proportional to the amount of magnetic flux instead of a change in magnetic flux may be used.

  Since the bill 90 reaches the magnetic sensors 201a to 201f after passing through the magnetic sensor 101, the magnetic sensors 201a to 201f detect changes in magnetic flux that occur when the MICR characters printed on the bill 90 pass. The magnetic data processing units 202a to 202f perform amplification processing, filter processing, and AD conversion on the change in magnetic flux detected by each magnetic sensor. In step S2002, each data after AD conversion is subjected to magnetic data determination unit 301. Hold on.

In step S2003, the magnetic data after AD conversion from the magnetic data processing unit 102 based on the output signal of the magnetic sensor 101 held in the magnetic data determination unit 301 in step S2001 is segmented for each character. For example, Japanese Patent Application Laid-Open No. 03-216781 describes how to separate each character.
As in the E13B font character leading edge reading method disclosed in Japanese Patent Publication No. Gazette, using the fact that the character start always starts from the positive peak, the character head is detected, and the character width is calculated from the sampling period. In this way, the carving is performed. However, other methods may be used for character separation.

In step S2004, the character is discriminated by comparing the magnetic data carved for each character in step S2003 with the data held (stored) in the dictionary table 302. Each character of the E13B font used in this example is such that when the waveform obtained when read by the magnetic sensor is divided into eight equal parts in the time axis direction, the peak position of the magnetic waveform exists in different blocks. It is configured. Therefore, the character is discriminated by dividing the width of one character divided into eight equal parts with respect to the time axis, and comparing with which block the peak position of the magnetic waveform exists in the dictionary table 302. Is used.

In step S2005, a CPU (not shown) (not shown) determines whether to perform the processes in steps S2006 and S2007 from the character discrimination result (detection result) based on the magnetic waveform read by the magnetic sensor 101, in the comparison processing unit 303. Do. The criteria for performing steps S2006 and S2007 are characters having similar magnetic waveforms such as “2” and “5” in the MICR character font E13B as a result of character discrimination by reading from the magnetic sensor 101. It is when it is judged that there is, and when it is unread. For this determination performed by a CPU (determination means) (not shown), characters having similar magnetic waveforms are registered in the comparison processing unit 303 in advance. In this way, when it is determined that the magnetic waveform is not a specific character similar to the character and is not unread, the processing of steps S2006 and S2007 is omitted, and the process proceeds to step S2008.

In step S2005, if the magnetic waveform is similar or unread, the processes in steps S2006 and S2007 are performed. In step S2006, the magnetic data after AD conversion from the magnetic data processing units 202a to 202f based on the output signals of the magnetic sensors 201a to 201f held in the magnetic data determination unit 301 in step S2002 is segmented for each character. For character-by-character segmentation, processing similar to that described in step S2003 is performed on each magnetic data.

  In step S2007, a CPU (not shown) (not shown) discriminates characters by comparing each magnetic data segmented for each character in step S2006 with data held in the dictionary table 302. In the character discrimination method, processing similar to that described in step S1007 is performed on each magnetic data.

In step S2008, if the determination result in step S2005 is not determined to be a character with a similar magnetic waveform and is not unread, the determination result from the magnetic sensor 101 is output, otherwise. Outputs the discrimination results from the magnetic sensors 201a to 201f. In step S2009, the bill 90 is distributed to the two paper outlets according to whether or not the MICR characters have been read normally and the description contents of the MICR characters, and the reading process is terminated.

The first magnetic sensor and the second magnetic sensor having a width that can be contacted over the entire width with respect to the MICR character are installed by being shifted, and one of the magnetic sensors is placed at a position where the entire width (first predetermined region) can be contacted with respect to the MICR character. You may install the other in the position which can contact over a part (2nd predetermined area | region) of a MICR character. The MICR character can be discriminated from the difference between the two outputs, and the method may be performed in accordance with the method described above. Also, one of the first magnetic sensor and the second magnetic sensor is installed at a position where it can contact approximately half or less of the MICR character (first predetermined region), and the other is approximately half or less of the other MICR character. You may make it install in the position which can contact (2nd predetermined area | region). Note that the width of the magnetic sensor installed at a position other than the position where the entire width of the MICR character can be touched may be appropriately reduced.

In addition, you may use the component of said each Example together with another Example. In each embodiment, processing such as MICR character determination and the like may be performed by an external device such as a host PC connected to the magnetic ink character reading device. In this case, a system including a magnetic ink character reading device and an external device corresponds to the magnetic ink character reading device of the present invention.

As described in the above embodiments, in a magnetic ink character reading apparatus capable of recognizing MICR characters by output from a single magnetic sensor 101 and MICR characters by outputs from a plurality of magnetic sensors 201a to 201f, Even in situations where MICR character recognition based on output from a single magnetic sensor 101 is likely to cause misreading or unreading due to fluctuations or the like, misreading or unreading is performed by performing MICR character recognition from the magnetic sensors 201a to 201f as necessary. This can be reduced, and since it is not performed when MICR character recognition from the magnetic sensors 201a to 201f is unnecessary, a magnetic ink character reading device close to the conventional processing speed can be realized.

DESCRIPTION OF SYMBOLS 1 Magnetic ink character reader 2 Hopper part 3 Conveying path 4 Outlet 5 Host PC
6 Cable 10 Paper detection sensor 90 Handprint 91 Magnetic character printing area 100 Permanent magnet 101 Magnetic sensor 102 Magnetic data processing unit 103 Magnetic data determination unit 104 Dictionary data 201a Magnetic sensor 201b Magnetic sensor 201c Magnetic sensor 201d Magnetic sensor 201e Magnetic sensor 201f Magnetic sensor 202a Magnetic data processing unit 202b Magnetic data processing unit 202c Magnetic data processing unit 202d Magnetic data processing unit 202e Magnetic data processing unit 202f Magnetic data processing unit 301 Magnetic data determination unit 302 Dictionary data 303 Comparison processing unit

Claims (5)

Conveying means for conveying the sheet to the conveying path;
First detection means having a single magnetic sensor for detecting magnetic print information printed on a sheet conveyed to the conveyance path;
Second detection means having a plurality of magnetic sensors for detecting the magnetic printing information;
Magnetic ink, comprising: a determination unit configured to determine, based on a detection result of the first detection unit, whether to detect the magnetic print information based on outputs of the plurality of magnetic sensors by the second detection unit. Character reader. Conveying means for conveying the sheet to the conveying path;
First detection means having a single magnetic sensor for detecting magnetic print information printed on a sheet conveyed to the conveyance path;
Second detection means having a plurality of magnetic sensors for detecting the magnetic printing information;
Judgment means for judging whether to detect the magnetic print information by the first detection means or to detect the magnetic print information based on outputs of the plurality of magnetic sensors by the second detection means. A magnetic ink character reading device comprising: 2. The magnetic print information is detected by the second detection unit with respect to the magnetic ink character when the first detection unit detects that the magnetic ink character is a specific character. The magnetic ink character reading device described in 1. The first detection means compares the peak position of the output from the magnetic sensor included in the first detection means with data stored in advance, and the second detection means includes a plurality of second detection means means. The magnetic ink character reading device according to claim 1, wherein peak positions of a plurality of output signals from the magnetic sensor are compared with data stored in advance. A first detecting unit having a single magnetic sensor for detecting magnetic printing information printed on the sheet conveyed to the conveying path;
Second detection means having a plurality of magnetic sensors for detecting the magnetic printing information;
A method for controlling a magnetic ink character reader having
And a determining step of determining whether to detect the magnetic print information based on the outputs of the plurality of magnetic sensors by the second detection means based on the detection result of the first detection means. Ink character reader control method.

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