Passbook Printing Improvement
Original Publication Date: 1986-Nov-01
Included in the Prior Art Database: 2005-Mar-09
Good printing near the centerfold of a passbook is difficult. This is due to the discontinuity of the printing surface resulting from the, generally, unequal document thickness (number of pages) on opposite sides of the fold, as illustrated in Fig. 1. In the past, various passbook printers with a moving print-head have addressed the problem of maintaining constant print-head-to-media gap by using a floating print-head, floating platen, split platens, etc. Some of these solutions are effective only for horizontal and some only for vertical passbooks; none are equally efficacious for both. One current method (Fig. 2) uses a floating print-head 1 which is spring loaded against passbook 2 and carries below it roller 3 to maintain constant print-head-to-media gap 4.