CLOSED SYSTEM FOR VENTING A DISPENSER RESERVOIR

摘要

A fluid product reservoir, for a dispensing system, is made of a container having walls that include an aperture formed at one end thereof. A reservoir cap seals the aperture from exposure to the atmosphere. A pump integrated into the reservoir cap allows fluid product to be dispensed from the dispensing system. A closed venting mechanism is included and incorporates one or more air channels that direct ambient air into a bladder positioned internal to the fluid product reservoir. The expansion of the bladder functions to displace fluid pumped from the reservoir thereby equalizing pressure while maintaining a sanitary seal of the fluid reservoir.

主权项

1. A refill unit for an associated dispensing system dispensing an associated liquid product, comprising:
a reservoir defining an internal region for storing an associated liquid product, wherein the internal region is sealed from exposure to ambient air, wherein the reservoir includes an aperture through which the associated liquid product is operatively dispensed without exposing the internal region to ambient air; an air-tight variable volume bladder disposed within the internal region of the reservoir, the air-tight variable volume bladder defining an expandable bladder volume region that is sealed with respect to the internal region of the reservoir, wherein the air-tight variable volume bladder includes an inlet; and, wherein the reservoir includes an orifice open to ambient air and wherein the inlet of the air-tight variable volume bladder is connected to the orifice in a sealed manner to prevent exposure of the internal region of the reservoir to ambient air, and wherein the air-tight variable volume bladder expands when associated liquid product is operatively dispensed from the reservoir.