Patent ID: 8808482

Claim:
A method of manufacturing flexible insulated duct within a truck, the method comprising: providing a substantially flexible tubular core traveling in a longitudinal direction within the truck; providing a layer of insulation traveling in the same direction within the truck as the substantially flexible tubular core; passing the substantially flexible tubular core and the layer of insulation concurrently through a first collar within the truck, wherein the layer of insulation exits the first collar in a U-shape around the substantially flexible tubular core; passing the substantially flexible tubular core and the layer of insulation concurrently through a second collar within the truck, wherein each of two longitudinal edges of the layer of insulation overlap to form a seam within the second collar, the layer of insulation exits the second collar in a cylindrical-shape around the substantially flexible tubular core to form an insulated core, wherein the second collar is downstream from the first collar; passing the insulated core downstream from the second collar; passing the insulated core and a substantially flexible outer layer concurrently through a third collar within the truck, wherein each of two longitudinal edges of the outer layer overlap under a heat source to form a seam within the third collar, the substantially flexible outer layer exits the third collar in a cylindrical-shape around the insulated core, wherein the third collar is downstream from the second collar, thereby forming the flexible insulated duct within a truck; and cutting the flexible insulated duct within the truck to a discrete length.