Loose-fill insulation exhaust gas treatment device and methods of manufacturing
First Claim
1. A method of manufacturing an exhaust gas treatment device, the method comprising placing a loose-fill insulation into the volume of space between an inner layer and an outer layer and positioning a piece of fiber mat between the outer layer and the inner layer to form a barrier that at least partially prevents the loss of the loose-fill insulation from the volume of space between the outer layer and the inner layer but does not create an airtight seal, wherein during the step of placing the loose-fill insulation the method further comprises compacting the loose-fill insulation resulting in a density of the loose-fill insulation that is greater than a bulk density for the loose-fill material, and wherein the exhaust gas treatment device is configured to pass air through the volume of space between the inner layer and the outer layer by applying a pressure produced by a moving vehicle.
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Accused Products
Abstract
An exhaust gas treatment device, which includes an outer layer, an inner layer that is at least in part disposed within the outer layer, and a loose-fill insulation disposed in the volume between the outer layer and the inner layer, where a piece of fiber mat is disposed between the outer layer and the inner layer and forms a barrier that at least partially prevents the loss of the loose-fill insulation from the volume between the outer layer and the inner layer and a manufacturing method that includes placing a loose-fill insulation into the volume of space between an inner layer and an outer layer and positioning a piece of fiber mat between the outer layer and the inner layer to form a barrier that at least partially prevents the loss of the loose-fill insulation from the volume of space between the outer and inner layers.
104 Citations
14 Claims
- 1. A method of manufacturing an exhaust gas treatment device, the method comprising placing a loose-fill insulation into the volume of space between an inner layer and an outer layer and positioning a piece of fiber mat between the outer layer and the inner layer to form a barrier that at least partially prevents the loss of the loose-fill insulation from the volume of space between the outer layer and the inner layer but does not create an airtight seal, wherein during the step of placing the loose-fill insulation the method further comprises compacting the loose-fill insulation resulting in a density of the loose-fill insulation that is greater than a bulk density for the loose-fill material, and wherein the exhaust gas treatment device is configured to pass air through the volume of space between the inner layer and the outer layer by applying a pressure produced by a moving vehicle.
Specification