Electrically-operated dispensing module
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United States of America Patent
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Feb 7, 2006
Grant Date -
Oct 7, 2004
app pub date -
Apr 3, 2003
filing date -
Apr 3, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Electrically-operated dispensing modules capable of dispensing small volumes of a viscous liquid at high operating frequencies and reproducibly among successive dispensed volumes of viscous liquid without the occurrence of stringing. The dispensing module may include a flux element having a portion effective for interrupting circumferential electrical current paths. In another aspect, an end face of a pole piece of the dispensing module may include one or more non-magnetic spacer elements that prevent contact between the pole piece and armature when the dispensing module is opened.
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