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An extra electrode is added at the top or bottom of a column of electrodes of a resistive ribbon printer, and the font designer determines when this extra electrode is utilized for interline fill.
English (United States)
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This is the abbreviated version, containing approximately
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Font Design for Interline Fill
An extra electrode is added at the top or bottom of a column of electrodes of
a resistive ribbon printer, and the font designer determines when this extra
electrode is utilized for interline fill.
A resistive ribbon printer has a vertical column of 40 electrodes for printing a
character within a character box. Interline fill occurs when a character extends
across the upper or lower line boundaries of the character boxes, such as for
printing a vertical bar in two vertically adjacent character boxes. Such a vertical
bar extends across the line boundaries and ideally should appear continuous.
An extra electrode is added at the top or bottom of the column. The extra
electrode is selected as is any other electrode, and therefore it is driven only
when that electrode is specifically called for by the character font. This allows the
font designer to determine the use of the extra electrode with each character.
Thus, the printer software does not have to apply a general algorithm to
determine use of the extra electrode and processing of such an algorithm during
printing is eliminated. Visual results can be much more pleasing than those
resulting from application of a general algorithm. ***** SEE ORIGINAL FOR
MATHEMATICAL EQUATIONS IN DOCUMENT *****
Normal text would have the full use of 40 electrodes without concern as to
interline fill distorting shapes. Characters that are generally used across line
boundaries would include activation of...