Non-decoded type bar code reading apparatus

Details Non-decoded type bar code reading apparatus Non-decoded type bar code reading apparatus

1992-10-08

1993-12-14

Pitts, Harold

Registers

Coded record sensors

Particular sensor structure

235462, 235463, G06K 710

Patent

active

052705250

ABSTRACT:
A bar code reading apparatus for optically reading a bar code comprising bars and spaces successively and alternately arranged to output a digital signal to a decoder placed at the reading apparatus. The reading apparatus includes a conversion circuit for converting the bar code information into a digital signal having high-level and low-level portions with time periods corresponding to the widths of the bars and spaces. Also included in the reading apparatus is a preprocessing unit for converting the digital signal into width data to correct the width data so as to narrow the scattering of the width data. The preprocessing unit reproduces a digital signal on the basis of the corrected width data, which is in turn supplied as the bar code information to the decoder. With this arrangement, the decoder can easily and surely decode the inputted bar code information.

REFERENCES:
patent: 4528444 (1985-07-01), Hara et al.
patent: 4818856 (1989-04-01), Matsushima et al.
patent: 4845348 (1989-07-01), Ho et al.
patent: 4864112 (1989-09-01), Imai et al.
patent: 4900907 (1990-07-01), Matsusima et al.

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