Apparatus and method for pressure dispensing of high viscosity liquid-containing materials
A liner-based pressure dispensing container includes a connector-mounted probe arranged to seat a dip tube against an inner surface of a liner fitment for sealing utility. A dip tube and probe may include increased and/or matched flow area. A reverse flow prevention element can be arranged proximate to a liquid extraction opening to inhibit reverse flow of liquid from a dip tube into a container. A liner-less container may include a reduce diameter lower portion arranged to receive a dip tube, with at least one associated sensor to sense a condition indicative of depletion of liquid from the lower portion. A shipping cap can be included for removing headspace gas from the liner. In one embodiment, the shipping cap is suitable for direct connection to a dispensing process.
1. A connector for a liner-based pressure dispensing apparatus, comprising:
a body structure including an internally threaded lateral wall arranged to cooperate with an externally threaded portion of the neck of a rigid container, the body structure defining a lower recess proximate to the internally threaded lateral wall;
an internal retainer disposed in the body structure, the internal retainer defining a recess in fluid communication with the lower recess of the body structure;
a probe defining a fluid flow passage therethrough, wherein a lower portion of the probe extends into the lower recess for operative coupling with an upper portion of a dip tube, the lower portion of the probe having a tapered face that is inclined with respect to a central axis of the probe; and
structure defining at least one gas flow passage arranged to enable fluid communication between an exterior surface of the connector and the lower recess,
wherein the lower portion of the probe is configured to directly contact the upper portion of the dip tube for seating the upper portion of the dip tube against an inner surface of a fitment to sealingly engage the dip tube between the probe and the fitment when the connector is mated with the liner-based pressure dispensing apparatus.
2. The connector of claim 1 , wherein a circumferential sealing element is arranged along an outer wall of the probe above the lower portion in order to engage a fitment retainer when the connector is mated with the liner-based pressure dispensing apparatus.
3. The connector of claim 1 , wherein at least the lower portion of the probe comprises metallic material for engagement with the dip tube, wherein the dip tube is of a polymeric material.
4. The connector of claim 3 , wherein the at least one gas flow passage comprises a first gas flow passage and a second gas flow passage, each being fluid communication with an annular region of the lower recess, the annular region defined between the body structure and the probe.
5. The connector of claim 3 , further comprising a pressure relief valve in fluid communication with the second gas flow passage.
6. The connector of claim 1 , wherein the probe includes a stress concentrator that extends radially outward from an outer surface of the lower portion of the probe for engagement with the dip tube.