Bar-coded film spool

Details Bar-coded film spool Bar-coded film spool

1993-06-23

1994-03-22

Gellner, Michael L.

354 21, G03B 1726

Patent

active

052968871

ABSTRACT:
A rotatable film spool comprises a bar-coded disk with a bar code symbol consisting of a sequence of lesser and greater photo reflective elements having various widths. According to the invention, the lesser photo reflective elements are respective cut-outs in the disk and the greater photo reflective elements are respective flat segments of the disk between adjacent pairs of the cut-outs. By making the lesser photo reflective elements of the bar code symbol respective cut-outs in the disk and the greater photo reflective elements respective flat segments of the disk between adjacent pairs of the cut-outs, it is generally assured that the bar code symbol will be critically located because the various elements are an integral part of the disk.

REFERENCES:
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patent: 5023642 (1991-06-01), Pagano
patent: 5030978 (1991-07-01), Stoneham et al.
patent: 5032854 (1991-07-01), Smart et al.
patent: 5079565 (1992-01-01), Shimizu et al.

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