Kone Inc. and Lamorak Insurance Co. agreed that Kone wasn’t entitled to coverage for an asbestos claim under a series of umbrella policies that ran from 1977 to 1985 unless and until Kone horizontally exhausted all available primary coverage, but they disagreed on whether a second set of policies that Kone purchased from Lamorak for the same time period — which included a self-insured retention, or SIR, and described themselves as “excess insurance, applicable excess of the retained limit” &mdash …