Preventing Uneven Electrode Wear in Resistive Thermal Transfer Printing
Original Publication Date: 1985-May-01
Included in the Prior Art Database: 2005-Feb-18
In resistive thermal transfer printing it is important that during printing even head wear occurs. The heads tend to wear preferably where they are used, that is in the printed areas. As a result, head life has been affected because uneven electrode wear occurs. A solution to this problem is the inclusion of abrasive particles in the substrate at a 0.5 to 12% level of addition based on the level of carbon. Diatomaceous silica is a suitable additive, although other particles, such as alumina, may be used. The particle size can vary from sub-micron to about 7 microns, but, in any case, should not be larger in particle size or cross-section than the thickness of the substrate. Dispersion should be uniform. During the printing process the electrodes are worn uniformly by the abrasive particles.