Abstract: A moving web is coated on one side thereof by passing the web through an elongated pool of coating liquid. The pool is replenished by an elongated manifold having an internal, elongated, uniform-cross section, runner conduit which is supplied with liquid from at least one inlet port, located generally at its midpoint. Ink flows from the runner conduit, to the pool, by passing through a plurality of flow-restricting slots. The slots provide greater restriction to flow adjacent the inlet port, than at the two ends of the runner conduit.

Abstract: A bidirectional mechanical power coupler between power input and output means provides a firm connection in one direction and a resilient coupling in the opposite direction, particularly operable immediately after a rapid reversal of the mechanical drive direction. The coupler interconnects a common power source in a copier/duplicator with a reciprocating carriage for original document scanning. It is preferably implemented with a single pulley of coaxial hubs with an interposing arm extending from one hub into a spring-retaining groove in another hub.