초록 ▼

Bar codes and auxiliary characters representative of the contents of the bar codes are printed on an article which is limited with respect to the available space in distinguishably recognizable and superposed relations. By selecting appropriately the lightness of the auxiliary characters, reflected

Bar codes and auxiliary characters representative of the contents of the bar codes are printed on an article which is limited with respect to the available space in distinguishably recognizable and superposed relations. By selecting appropriately the lightness of the auxiliary characters, reflected light resulting from scanning of the bar code is converted into an electrical signal which is subsequently converted into a binary signal with the signal components due to the auxiliary characters being neglected, to thereby extract only the signal originating in the bar code. A bar code reader is provided which comprises an A/D converter for compensating the output of bar code detection due to the character pattern superposed on the bar code.

대표청구항 ▼

A combination of a bar code and a character indicative of the contents of said bar code adapted to be used with an article and a bar code reader, wherein said bar code is formed of spaced bars of a marking material with said character having lesser amounts of marking material to make the character d

A combination of a bar code and a character indicative of the contents of said bar code adapted to be used with an article and a bar code reader, wherein said bar code is formed of spaced bars of a marking material with said character having lesser amounts of marking material to make the character distinguishably recognizable, said character marking material being superposed with the bar marking material such that a first area of said character overlapping with bar marking material has an average value of light reflectivity at a first level between the value of light reflectivity of said bar marks and a binarizing threshold reference level and a second area of said character marking material overlapping with a background region of said bar code and having a value of light reflectivity of a second level between the value of light reflectivity of said background and said binarizing threshold reference level.