Bar-code reader and bar-code reading method for detecting various possible reproducible bar code combinations and synthesizing information therefrom

A bar-code reader comprising:

• scanning and extracting means for scanning a bar-code with electromagnetic radioactive rays and then extracting data regarding a bar-width thereof based on the reflected rays;
• demodulating means for demodulating said bar-width data extracted by said scanning and extracting means and creating the demodulated data;
• combination judging means for judging the presence or absence of one of a plurality of possible bar-code reproducible combinations in demodulated data created by said demodulating means and for judging the type of combination when the reproducible combination exists;
• delta-distance distortion evaluating means for evaluating a degree of deviation of a distance of every character of the bar-width data from a predetermined standard of the bar-width data extracted by said scanning and extracting means;
• and
• screening and synthesizing means for screening demodulated data or a character forming demodulated data, based on said degree of deviation determined by said delta-distance distortion evaluating means and then synthesizing said demodulated data screened or said character screened according to the type of combination judged by said combination judging means.