SCANNER FOR READING BAR CODES ON MULTIPLE ITEMS
Original Publication Date: 1997-Dec-31
Included in the Prior Art Database: 2004-Apr-08
Xerox Disclosure Journal
Disclosed is an improved, non-mechanical method of scanning bar codes on more than one item in rapid succession using a single sensor. As shown in the FIG. 1, bar code labels 14 and 15 are applied to the end of containers 10 and 12 (e.g., finishing unit cover stock). The labels read by a charge-coupled device (CCD) array 26 comprise information about the binding width, and the cover stock material type. Bar code labels 14 and 15 are focused on CCD 26 at the same time. This is accomplished through use of a half-silvered minor 20, an arrangement of angled mirrors 22 and 23, and a lens 24. After a baseline scanner reading is taken, illuminators 16 and 18 energize in succession to project the respective code image. The dim image reflected from the non-illuminated code will not effect the total image signifcantly when compared to the baseline and brighter image. The increased depth of field resulting from the bright illuminators and small aperture lens makes it possible to scan additional codes in a similar fashion.