Elastomeric sleeve and method for assembling the sleeve on a one-way valve body

A one-way valve for dispensing a fluid material from a container comprising a valve body having an inlet end for receiving the fluid material from the container and an outlet end for dispensing the fluid material out of the valve body, said valve body has a circumferentially extending outside surface extending in the direction between the inlet end and the outlet end of said valve body, at least one first outlet passageway extending from the inlet end of said valve body to the outside surface thereof, at least one second outlet passageway extending from the outside surface of said valve body to the outlet end thereof, at the outside surface of the valve body said first and second outlet passageways arranged in spaced relation, an elastomeric sleeve tightly fitted around the outside surface of said valve body and forming a closure at the outside surface for said first and second outlet passageways, said sleeve having a radially inner surface, a radially outer surface, a first end located adjacent said inlet end and a second end located adjacent said outlet end, and means formed monolithically with and adjacent said first and second ends of said sleeve and forming a fluid tight seal with said valve body, said means comprises an O-ring like enlargement on each of the opposite ends of said sleeve, said valve body has an axially extending central section contacted by said sleeve and a pair of opposite end sections recessed inwardly from said center section and having a smaller diameter than said center section, said end sections each forming an annular shoulder at the opposite ends of said center section, and said enlargements seated in sealing contact with said shoulders.