Synchronized Blister Pack Infeeds are production machines. It automatically heat-seals blister packs of pharmaceutical capsules into match book-like covers coated on interior surfaces with a heat-sealing composition. It provides an outer surface with descriptive printed material. The machine deposits covers in a folded condition onto flights spaced uniformly transversely across an endless conveyor chain, opens the folded covers in order to receive the blister packs between sealing flaps. It back covers folds front then prior to packaging. The several operations are necessarily synchronized with continuous stop-and-go movement of the chain by means of cams, linkages and pivoting members