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AssigneeInterrad Corporation
InventorsFrank P. Marino, Evert P. Light
Estimating the term…
An electrostatic powder coating installation is disclosed, incorporating a spray booth in which there are arranged electrostatically charged powder spraying means whereby the powder spray means may apply a coating of said powder to an article. One portion of the internal walls of the spray booth is provided with a filter which is movable through the booth to a cleaning position outside the booth. The movable filter is arranged within the booth so that one face thereof is exposed to the interior of the booth and the opposite face thereof confronts the intake side of a suction device which is effective through the filter to maintain a slightly negative pressure within the booth. The overspray of powder directed at the article will therefore be attracted to and deposited on the exposed face of the movable filter. In accordance with the invention, the filter comprises a first or filter layer facing the booth interior to form the exposed face of the movable filter and a second or support layer underlying and co-extensive with the first layer to provide a firm filter construction. At the cleaning position, a cleaning device is operatively associated with said filter layer to remove the overspray deposited thereon. Additional means are also provided at the cleaning station to separate the support layer from the filter layer whereby friction between the filter layer and the cleaning device is greatly reduced to extend the useable life of said movable filter.
A filter belt system for a powder recovery booth or the like, which comprises
In a powder coating installation, comprising a spray booth provided with an internal compartment, a powder supply container, means operatively associated with said supply container for delivering powder into said internal compartment, a filter member movable in a predetermined direction of travel through the spray booth, one face of said filter member bounding a part of the internal compartment of the spray booth, a suction device effective through the filter member at said internal compartment to create a slightly negative pressure within said compartment, and a cleaning device operatively associated with the filter member in a predetermined area for removing excess powder which has been desposited on the filter member, the improvement comprising
Dependencies are inferred from the claim text.