Bar-coded film spool

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.

Dependencies are inferred from the claim text.