Droplet deposition apparatus
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United States of America Patent
Stats
-
Jul 4, 1989
Grant Date -
N/A
app pub date -
Jan 11, 1988
filing date -
Jan 11, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ink jet'drop-on-demand' printer has a number of parallel channels each containing ink. A thread of mercury extends longitudinally of each channel or pair of channels and is connected for electrical current flow. A magnetic field is applied orthogonally to the channel plane such that current flow in a selected channel causes electromagnetic deformation of the mercury thread. This leads to a pressure pulse in the ink causing ejection of an ink droplet. With a mercury thread shared between a pair of channels, current in the opposite sense results in droplet ejection from the opposite channel of the pair.
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