Patent ID: 8764871

Claim:
A single-stage combination filter for use in the painting industry, the single-stage combination filter comprising: a plurality of first layer media pockets, an opening of each of the plurality of first layer media pockets arranged in parallel with one another to receive an incoming airflow into the single-stage combination filter; and a plurality of second layer media pockets in airstream communication with and configured to be downstream of the plurality of first layer media pockets, each of the plurality of first layer media pockets and the plurality of second layer media pockets including at least one bonded portion formed on side edges of the pockets, the at least one bonded portion being formed on a downstream region of each of the plurality of first layer media pockets and second layer media pockets and configured to be substantially parallel to a direction of the incoming airflow, each of the plurality of second layer media pockets being at least 99.97% efficient at removing 0.3 micron and larger particles at a face velocity of about 37 meters per minute.