Bar code reader enhancement

Details Bar code reader enhancement Bar code reader enhancement

1974-06-11

1976-07-13

Cook, Daryl W.

Registers

Calculators

Input-output calculator to indicator, printer, etc.

307268, 328150, H03K 501, H03K 606, G06K 714

Patent

active

039696120

ABSTRACT:
Video signals generated by reading bar coded documents are transformed into pulses uniformly truncated in amplitude and having transitions only at points corresponding to change in sign of the slope of the adjusted video signals. The pulses are utilized to control the state of an output device depending upon whether the integral of any of the truncated pulses exceeds a reference level.

REFERENCES:
patent: 3538444 (1970-11-01), Adlhoch
patent: 3631263 (1971-12-01), Graham
patent: 3654562 (1972-04-01), Reilly
patent: 3860794 (1975-01-01), Knockeart

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