Browse Prior Art Database

Check Orientation Detection for Automatic Teller Machine

IP.com Disclosure Number: IPCOM000039388D
Original Publication Date: 1987-Jun-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 70K

Publishing Venue

IBM

Related People

Callaway, MB: AUTHOR [+5]

Abstract

An automatic teller machine (ATM) validates checks presented to it by printing on the check. It is desirable that validation be printed in the same area on all checks to facilitate later manual processing. It is therefore desired to detect the orientation of the check prior to validation and return improperly oriented checks to the ATM user for re-insertion. The present embodiment performs this function by means of a pair of optical sensores which detect the presence of a specific field of the MICR characters on a properly-oriented check. Fig. 1 shows that check 1 is inscribed with magnetic characters on either line 2 or line 3. It is seen that as the check moves in the direction shown, it will pass infrared photodetectors 4 and 5 which are positioned to scan lines 2 and 3, respectively.

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Check Orientation Detection for Automatic Teller Machine

An automatic teller machine (ATM) validates checks presented to it by printing on the check. It is desirable that validation be printed in the same area on all checks to facilitate later manual processing. It is therefore desired to detect the orientation of the check prior to validation and return improperly oriented checks to the ATM user for re-insertion. The present embodiment performs this function by means of a pair of optical sensores which detect the presence of a specific field of the MICR characters on a properly-oriented check. Fig. 1 shows that check 1 is inscribed with magnetic characters on either line 2 or line 3. It is seen that as the check moves in the direction shown, it will pass infrared photodetectors 4 and 5 which are positioned to scan lines 2 and 3, respectively. Logic 6 provides MICR detection and timing control so sensors 4 and 5 are activated to scan a specific part of the line of magnetic characters identified as the "transit field". The leading and trailing edges of a character each produce a change in state of the sensor scanning it. Since this field has a consistent format, a predetermined minimum number of state changes occur in only one of the sensors when scanning a correctely- oriented check. Fig. 2 shows the flow chart for the MICR detection algorithm. It is seen that during passage of the transit field, the state of sensors 4 and 5 are repeatedly read, and stored, and c...