Abstract: A filtering element includes a circumferentially extending filter media having a pair of opposite ends. An end cap assembly closes the ends of the filtering media and consists of an annular cup-shaped member defining a circumferentially extending trough. A circumferentially extending band of sealant is dispensed into the trough. The media and the centertube, which supports the inner diameter of the media, is installed in the sealant within the trough. The sealant may be either Plastisol or a photo-initiating polymer. The end cap can be made transparent to ultraviolet light, so that the photo-initiated polymer can be cured by transmitting ultraviolet light through the end cap.

Abstract: A filter element is assembled by first fixturing the parts together so that the assembly may be manipulated by automated assembly equipment before the end cap sealant is fully cured in an oven which is off-line from the automated assembly equipment. In one embodiment, a plastisol sealant is used, which is "kiss-gelled" by rapidly increasing the temperature of the sealant for a few seconds to cure the sealant sufficiently to permit the assembly to be handled but without fully curing the sealant. The end cap on the other end of the assembly is then installed and kiss-gelled before the completed (but uncured) assembly is transferred to a curing oven where the plastisol at both ends of the assembly is fully cured at the same time.