Method and device for reading a bar code of variable orientation

Details Method and device for reading a bar code of variable orientation Method and device for reading a bar code of variable orientation

1991-12-20

1992-10-13

Shepperd, John W.

Registers

Coded record sensors

Particular sensor structure

235467, 235470, G06K 710

Patent

active

051553449

ABSTRACT:
The present invention provides a method and apparatus for reading bar codes having variable orientations on a substantially motionless medium. A portion of the surface of the medium having a bar code in a variable orientation is scanned using a light source and a photodetector receives the beam reflected from the surface and generates signals corresponding to the scanning lines. The signal corresponds to the scanning lines and has amplitude peaks corresponding to the intersection of the bars by the light beam. The amplitude peaks and position of the peaks on the scanning lines are recorded. The sum of the amplitude peaks is formed in the positions of the bars and deduced from the sums of the peaks amplitudes.

REFERENCES:
patent: 3588451 (1971-06-01), Nelson
patent: 4289957 (1981-09-01), Neyroud et al.
patent: 4308455 (1981-12-01), Bullis et al.
patent: 4409469 (1983-10-01), Yasuda et al.
patent: 4717818 (1988-01-01), Broockman et al.
patent: 4806741 (1989-02-01), Robertson
patent: 4916297 (1990-04-01), Tukada et al.
patent: 5045677 (1991-09-01), Okamura

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