Package with several chambers and valves

摘要

In a dispensing system comprising a container having at least two storage chambers, each for a fluent material, the finishes of the respective chambers are arranged in a contiguous pair defining a cylindrical surface having outer threads, except for two anti-rotational flats. Each finish defines an outlet. A valve of a type that remains closed until opened by a differential between inside pressure and outside pressure overlies the outlet defined by each finish. A fitment defines a mixing chamber having two inlets, one for each storage chamber, and having an outlet. The fitment has two skirts, each having an inner surface having at least one rib, each defining an antirotational flat. The fitment fits over the paired finishes and over the valves so that the anti-rotational flats on the ribs engage the anti-rotational flats on the paired finishes. A collar having inner threads is threaded onto the paired finishes so as to hold the fitment, which holds the valves. Each valve has an elastomeric flange forming a seal between a margin of an associated outlet and a margin of an associated inlet. A dispensing spout is provided. The fitment and the dispensing spout have coacting formations, which permit the dispensing spout to be twisted in one rotational sense relative to the fitment so that the sealing formation of the dispensing spout engages the sealing formation of the fitment, to be twisted in the opposite sense relative to the fitment so that the sealing formation of the dispensing spout is disengaged from the sealing formation of the fitment, but not to become detached from the fitment.