US 6,231,646 B1 · Paint overspray exhaust air filter

Abstract

A paint overspray exhaust air filter for air laden with liquid paint overspray particulates being exhausted from an overspray paint booth includes an electrostatic charged or electret media used in conjunction with and positioned downstream of a primary high efficiency, high holding capacity overspray collection filter. The overspray air filter is designed to capture and retain virtually all of that overspray particulates contained in the air stream being exhausted from an overspray paint booth. The upstream overspray collection filter can include a single filter or additionally a secondary filter, but should be optimized to collect the overwhelming majority of the overspray particulates of a given size whereas the downstream electret media is adapted to collect overspray particulates that are smaller than the given size. The upstream overspray collection filter and the electret media can be separated or mechanically attached together.

Claims12

Dependent claims

A spray booth with a spray booth overspray exhaust air filter for removing liquid paint particulates from an air stream being exhausted from said spray booth, said overspray exhaust air filter comprising:

a primary collection filter through which said air stream with said liquid paint particulates flows and which is adapted to entrap at least some of said particulates of at least a given size;
and
an electret media mechanically attached to said primary filter and positioned relative to said primary collection filter such that said air stream flows through said electret media after said air stream flows through said primary collection filter so as to entrap at least some of said particulates remaining in said air stream of a size less than said given size.

Dependencies are inferred from the claim text.

Paint overspray exhaust air filter

Life of this patent

Paint overspray exhaust air filter

Life of this patent

Abstract

Claims12