Single Row Sensing System for Band Printers
Original Publication Date: 1987-Nov-01
Included in the Prior Art Database: 2005-Feb-02
A sensing system utilizes a print band having a single row of emitter timing slots of two different widths, as shown in Fig. 1. Emitter timing slots 1 are etched into the print band 2 of a band printer. An optical sensor 3 is positioned to detect the presence or absence of the timing slots, and detect their relative widths. The slots are the same size but represent two different types, namely, "home slots" H and "fire slots" F. The home slots are located on the same track or line as the firing slots as contrasted to the typical arrangement where the home slots and fire slots are vertically displaced on different tracks. A home slot precedes a fire slot by a predetermined distance D, and a home slot is differentiated from a fire slot by an identifier slot A directly upstream of the home slot.