Ribbon Saver Drive Apparatus
Original Publication Date: 1986-Aug-01
Included in the Prior Art Database: 2005-Mar-09
In a printer using ribbon saver, thermal ribbon print technology, it is desirable to drive the ribbon at three different velocities with respect to the carrier velocity. "Letter quality" printing requires a "single strike" or approximate one to one escapement of the carrier with respect to the ribbon. "Near letter quality" is defined as one to two ribbon feed to carrier displacement ratio, and "draft mode" is defined as one to five ribbon feed to escapement displacement. A low- cost operator-selectable design that accomplishes the above requirements is shown in the figure and comprises a carrier 1 with a ribbon- metering roller 2 fixedly attached to shaft 3 which freely rotates in carrier 1. Carrier 1 is escaped by motor 17 through belt 20 in direction of arrow 21.