Conveyors: fluid current – With signal – indicator – or inspection means
Reexamination Certificate
2005-02-22
2005-02-22
Dillon, Jr., Joe (Department: 3651)
Conveyors: fluid current
With signal, indicator, or inspection means
C406S092000, C406S152000, C406S153000
Reexamination Certificate
active
06857826
ABSTRACT:
An injector for a powder coating installation having an injector casing made of electrically non-conductive material, such as plastics. The interior surface and the exterior surface of the injector casing are coated with coatings of electrically conductive material, the coating of the exterior surface and the coating of the interior surface being electrically insulated from each other by interruptions. A means for tapping the friction charges is passed from the interior surface and out of the injector casing to a measuring instrument for measuring the charge current. The exterior surface of the injector casing is provided with a ground connection for establishing contact between the exterior surface and ground potential. In this manner the very small friction charge currents can be detected during operation of the injector without being affected by electromagnetic disturbances from outside.
REFERENCES:
patent: 5035360 (1991-07-01), Green et al.
patent: 5505566 (1996-04-01), Gruber
patent: 5924631 (1999-07-01), Rodrigues et al.
patent: 6071348 (2000-06-01), Seitz et al.
patent: 6569462 (2003-05-01), Cornelli et al.
Dillon, Jr. Joe
J. Wagner AG
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