Self-scanning code reading device

Details Self-scanning code reading device Self-scanning code reading device

1991-08-08

1993-06-01

Weinhardt, Robert A.

Registers

Coded record sensors

Particular sensor structure

235466, G06K 710

Patent

active

052162311

ABSTRACT:
A code reading device, which converts a bar code displayed on a medium into electric signals by means of a photo-electric converter and outputs them after having decoded them into data, which can be dealt with by an information processing device, wherein there are disposed two memories for storing data decoded, respectively, at the present time and data decoded at the last time and a comparator for comparing the data stored in these memories, and decoded data are transmitted to the information processing device, only when the two data differ from each other so that the amount of outputted data is reduced.

REFERENCES:
patent: 4012716 (1977-03-01), Herrin
patent: 4431912 (1984-02-01), Dickson et al.
patent: 4500776 (1985-02-01), Laser
patent: 4533825 (1985-08-01), Yamada
patent: 4634850 (1987-01-01), Pierce et al.
patent: 4713785 (1987-12-01), Antonelli et al.
patent: 4746789 (1988-05-01), Gieles et al.

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