Wrong sign toner extraction for a direct electrostatic printer
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United States of America Patent
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-
Feb 20, 1990
Grant Date -
N/A
app pub date -
Aug 28, 1989
filing date -
Aug 28, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Direct electrostatic printing (DEP) is enhanced by the provision of wrong-sign toner extraction holes or apertures provided in a printhead structure at a location which is upstream of the printing apertures. Wrong sign toner particles are extracted from a cloud of toner provided from a toner delivery device. The wrong sign toner is extracted from the powder cloud before the cloud reaches the vicinity of the printing apertures thereby minimizing print hole blockage.
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