Extending Fabric Ribbon Life Using Actuator Impulse Control
Original Publication Date: 1985-Jan-01
Included in the Prior Art Database: 2005-Feb-18
With the increase in color graphics printing, a greater share of printing is occurring on single part forms. Typically, color matrix impact printing is achieved using a four-color stripe ribbon as in the drawing. A method of prolonging the life of the ribbon is described herein. In the usual impact printer, the impulse of the actuator impact (the integral of the impact force over the impact time) is changed to accommodate the number of forms being printed, i.e., the number of carbon copies. This change is most often accomplished by moving the platen closer or further away from the actuators. For a constant impact impulse, the mass of ink in the impact region of the ribbon depletes with usage according to the sum of two exponential decays.