Photocopying – Contact printing – Light boxes
Patent
1988-11-21
1991-07-30
Braun, Fred L.
Photocopying
Contact printing
Light boxes
204302, G03G 1510, B01D 1706
Patent
active
050363654
ABSTRACT:
A filter for separating a flowing fluid containing charged particles into two streams, one essentially free of particles and one laden with particles, includes a main conduit having an inlet at one end for receiving the flowing fluid, and having two outlets downstream of the one end for dividing the flow into two outlet flow paths. A pair of electrodes between which the fluid flows, is located in the main conduit upstream of the outlets; and each of the outlets is associated with a respective electrode. Voltage sources are connected to the electrodes such that one is more positive than the other for establishing, in the fluid flowing between the electrodes, an electric field transverse to the direction of flow whereby the particles in the field are attracted toward one of the electrodes and travel into the outlet associated therewith. A dielectric coating of release material in the form of a fluorosilicone polymer is applied to the surface of the one electrode for inhibiting plating-out of particles thereon while fluid flows in the conduit.
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