Print Band Encoding Method
Original Publication Date: 1985-Mar-01
Included in the Prior Art Database: 2005-Feb-18
A band printer, in which the print band contains sprocket holes to drive an encoding disk, avoids dust problems experienced with optically sensed encoding windows integral to the print band. Fig. 1 shows one form of a metal print band 10, which contains encoding windows 15. The band is driven by magnetic hub 20. Dust accumulations can cause problems with optical sensing of the encoding windows, resulting in degraded printer throughput. Fig. 2 shows an improved print band 10 containing sprocket holes 25, which drive sprocket 30 as the print band is driven around its path by magnetic hub 20. An encoding disk 35 is mounted on the shaft of sprocket 30, adjacent to sensor 40. The sprocket 30 and the encode disk 35 are of low mass to minimize wear of sprocket holes 25.