.~ For facilitating even wear of platen surface (e.g., by irregular increments, etc.)
DEFINITION
Classification: 400/554
For facilitating even wear of platen surface (e.g., by irregular increments, etc.):
(under subclass 545) Subject matter wherein significance is attributed to the movement or adjustment of a platen* for the prevention of damage or deterioration to the platen by reason of the repeated impacting of type-face* elements on the same locations on the surface of the platen.
(1) Note. Many of the disclosures of this subclass include mechanisms for irregular line-spacing* to insure that successive print-line* rows will not be impacted against the same longitudinal paths of the platen, thus the longitudinal depressions in the surface of the platen that would otherwise be formed are distributed over the entire surface of the platen.
SEE OR SEARCH THIS CLASS, SUBCLASS:
555+, for structure to adjust the platen for irregular increments.
