Peristaltic voltage block roller actuator
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United States of America Patent
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Mar 16, 1993
Grant Date -
N/A
app pub date -
Mar 22, 1991
filing date -
Mar 22, 1991
priority date (Note) -
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Abstract
A peristaltic voltage block (34) couples a dispenser (10) to a source (20) of coating material. The peristaltic voltage block (34) has a length (220) of resilient conduit, a wall against which the resilient conduit lies in generally planar loops (222), and a rotor (246) including rollers (250, 350) for movably contacting the length (220) of resilient conduit at multiple contact points for substantially dividing the coating material in the peristaltic voltage block (34) into discrete slugs of coating material substantially to interrupt the electrical path through the coating material from the terminal to the coating material source (20). Either the wall or the rollers (250, 350) includes first regions where the loops (222) of resilient conduit lie, and second, raised regions. The second, raised regions adjacent the first regions retain the loops (222) of resilient conduit (220) in position.
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