Registers – Coded record sensors – Particular sensor structure
Patent
1987-06-18
1989-11-07
Pellinen, A. D.
Registers
Coded record sensors
Particular sensor structure
235463, G06K 710
Patent
active
048794562
ABSTRACT:
A method of decoding a binary scan signal consisting of a bit sequence produced by an electro-optical scanning device as the device scans bar code symbols on a label is disclosed. The bits in the sequence correspond to light and dark spaces making up the bar code symbols. The method includes the steps of: a. supplying the binary scan signal to a storage buffer such that the buffer contains a plurality of bits most recently produced by the scanning device, b. selecting a portion of the bit sequence which defines a large light space, c. subjecting the bits in the sequence following those defining the large light space to a series of tests to determine whether such bits were produced by scanning a bar code symbol which is valid in one or more of several bar codes, d. decoding the bar code symbol in the codes in which it is valid, e. subjecting the next bits in the sequence to a series of tests to determine whether such bits were produced by scanning a bar code symbol which is valid in any of the bar codes in which the previously decoded bar code symbol is valid, f. decoding the bar code symbol in the codes in which it and the previously decoded bar code symbol are valid, and g. repeating steps f. and g. above until all bar code symbols on the label have been decoded.
REFERENCES:
patent: 4354101 (1982-10-01), Hester
patent: 4687912 (1987-08-01), Ohta
patent: 4782220 (1988-11-01), Shuren
Brooks Michael T.
Cherry Craig D.
Taussig Andrew P.
Fuller Leon K.
Pellinen A. D.
Spectra-Physics Inc.
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