FILTER ASSEMBLIES AND METHODS FOR PRODUCING FILTER ASSEMBLIES

摘要

A filter assembly having at least two filter caps produced from a planar composite sheet of heat liquefied adhesive and metal layer (typically sheet metal). The filter caps are adhered to a porous, typically pleated, filter media positioned, which is generally an air filter, within channels of each filter cap wherein the adhesive, typically a plastisol, adheres the filter caps to the filter media and can impregnate the filter media.

主权项

1. A filter assembly comprising:
a first filter cap and a second filter cap each having a base section with a filter facing surface, an outer facing surface, and at least one perimeter wall located at an inner perimeter of the filter cap and/or an outer perimeter of the filter cap, wherein the at least one perimeter wall extends upwardly from the base section and wherein the perimeter wall or walls defines the base section of the filter cap and wherein the filter facing surface of the base section and the filter facing surface of the at least one perimeter wall each have a heat liquefiable adhesive on the surface thereof; and a filter media adhered to the base section of the first filter cap and the second filter cap by the heat liquefiable adhesive at a first filter cap engaging end portion of the filter media and a second filter cap engaging end portion of the filter media; wherein the first filter cap engaging end portion and the second filter cap engaging end portion are at opposite ends of the filter media and adhered such that some of the heat liquefiable adhesive is impregnated in at least the first filter cap engaging end portion and the second filter cap engaging end portion of the filter media; and wherein the first filter cap and the second filter cap each have at least two layers of material, a metal layer on the exterior facing side of the heat liquefiable adhesive layer and the heat liquefiable adhesive on the filter facing surface; wherein the heat liquefiable adhesive is liquid at temperatures above about 400° F. and solid at temperatures below about 350° F.; and wherein the heat liquefiable adhesive adheres to the surface of the metal layer in solid form at room temperature.