Underscore Print and Erase Optimization in a Resistive Ribbon Thermal Transfer Technology
Original Publication Date: 1985-Jun-01
Included in the Prior Art Database: 2005-Feb-18
A continuous underscore is printed by a print head having electrodes cooperating with a resistive ribbon while still erasing the underscore and the underscored character, when desired, without lifting off a section of the underscore greater than the width of the character box of the underscored character. Fig. 1 discloses that the first two pels (for ten pitch, thirty-six pels comprise a character box) of a character box has a constant current of 40 milliamps applied to each of three electrodes of a print head forming the underscore from the ink of the resistive ribbon. This is used for continuous underscoring printed in a slew mode, which is when there is printing of characters without stopping.