# US 9,873,075 B2 · High efficiency paint arrestance filter

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- Number: US 9,873,075 B2
- Document ID: US9873075B2
- Status: Granted
- Kind: B2
- Application number: 15/087,645
- Filed: 2016-03-31
- Published: 2016-07-28
- Granted: 2018-01-23
- Earliest claimed: 2011-07-20
- Assignees: A.J. Dralle, Inc.
- Applicants: A.J. Dralle, Inc.
- Inventors: James R. Dralle
- Web page: https://patentgrep.com/patent/US9873075B2

## CPC

- B01D 46/023: {Pockets filters, i.e. multiple bag filters mounted on a common frame}
- B01D 46/0001: {Making filtering elements}
- B01D 46/10: Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D 46/62: connected in series
- B01D 46/64: arranged concentrically or coaxially
- Y10T 29/49826: Assembling or joining
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Various examples of the inventive subject matter include a method and corresponding system for fabricating a combination paint arrestance filter for use in the painting industry. Embodiments of the system include a single-stage combination filter having a number of first layer media pockets and a number of second layer media pockets arranged downstream of the first layer pockets. An opening of each of the first layer media pockets is arranged in parallel with one another to receive an incoming airflow into the single-stage combination filter. Each of the second layer media pockets is at least 99.97% efficient at removing 0.3 micron and larger particles at a face velocity on the filter of about 37 meters per minute.

## Claims

### Claim 1

A method of forming a combination filter, the method comprising:
cutting a first layer media material;
cutting a second layer high-efficiency particulate air (HEPA) media material;
alternately interleaving the first layer media material and the second layer HEPA media material to form a pair of the first layer media material and the second layer HEPA media material;
folding the pair of the first layer media material and the second layer HEPA media material with the first layer media material being arranged inside of the second layer HEPA media material;
sealing sides of the folded pair of the first layer media material and the second layer HEPA media material;
forming a bonded portion on at least a portion of a side face of the folded pair;
inserting a rigid material into an open edge of the folded pair of the first layer media material and the second layer HEPA media material, thus forming a pocket assembly; and
inserting a plurality of the pocket assemblies in parallel to one another into a header assembly, the bonded portion to reduce a likelihood of adjacent ones of the plurality of the pocket assemblies touching one another.

### Claim 2 (depends on 1)

The method of claim 1, further comprising selecting dimensions of the combination filter to have a form-factor to fit into a standard filter wall as used in the painting industry.

### Claim 3 (depends on 1)

The method of claim 1, further comprising selecting the first layer media material and the second layer HEPA media material to have a combined initial pressure drop of about 60 Pascal at a face velocity of about 37 meters per minute.

### Claim 4 (depends on 1)

The method of claim 1, further comprising forming the bonded portion on a downstream region of the folded pair.

### Claim 5 (depends on 1)

The method of claim 1, further comprising forming the bonded portion to be substantially parallel to a direction of an input airflow.

### Claim 6 (depends on 1)

The method of claim 1, further comprising forming each of the plurality of the pocket assemblies as individual pockets folded with edges of each of the pockets sealed to one another.