Patent ID: 6206286
Filing Date: 2001-03-27
Classification: G06K

Abstract:
A bar code reader comprising:a detecting unit detecting a bar code pattern based on reflected beams from a bar code;a demodulating unit executing a demodulating process based on the bar code pattern detected by said detecting unit to obtain data coded into the bar code as demodulated data;a storage written with demodulated data and storing a predetermined plurality of recently written demodulated data;a timer measuring an elapsed time after actuating thereof and stopping when the elapse time reaches a predetermined time;a demodulated data validating unit for validating the demodulated data obtained by said demodulating unit on condition that the demodulated data is not identical with any piece of demodulated data stored in said storage if said timer is measuring the elapse time at a point when the demodulated data is obtained by said demodulating unit, and immediately validating the demodulated data obtained by said demodulating unit if said timer is not measuring the time at a point when the demodulated data is obtained by said demodulating unit;a demodulated data writing unit, when said demodulated data validating unit validates the demodulated data, for writing the demodulated data into said storage; anda timer actuating unit for actuating said timer when said demodulated data validating unit validates the demodulated data.