A hybrid brush seal is provided having two bundles of axially spaced seal bristles each of which are mounted in a ring shape on a first machine component with bristle ends directed at a sealing surface of the second, rotating machine component. The improved mortality tables described herein account for progression over time of insureds from one underwriting class to another, e. The estimated charge state may be coupled to a fuel gauge. The substrates are subjected to a getter processing and to a seal bonding process under a vacuum condition through a processing chamber, to complete an image forming apparatus.