Fluid flow connector, fluid pressure mechanism and product tank

Details Fluid flow connector, fluid pressure mechanism and product tank Fluid flow connector, fluid pressure mechanism and product tank

1998-02-20

1999-03-09

Kashnikow, Andres

Dispensing

With cutter and/or punch

To form dispensing opening in container

222 83, 222 835, 222 88, 222105, 222386, 2224007, B67D 500, B65D 3556, B65D 8300

Patent

active

058789154

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

The present invention relates to a disconnectable flow connector for connecting a fluid-containing flexible bag to a fluid supply line, comprising in combination: a spout for mounting on the flexible bag; a valve of the kind comprising a valve housing and plunger, for mounting on the end of the fluid supply line; sealing means for providing a seal between the valve housing and spout; and fluid communication means to allow fluid communication between the interior of the flexible bag and the interior of the valve housing.
The present invention also relates to a pressure mechanism for driving fluid from a flexible bag consisting of a housing for the bag and pressure application means for applying external pressure to the outer surface of the bag in the housing.
The invention also relates to a lid for a product tank having connections at the corners to engage studs on the tank and inwardly curved sides which facilitate removal of the lid from the tank.
The flow connector, pressure mechanism and lid of the invention are hereinafter described with reference to their utility in relation to air activatable adhesives, but it should be understood that the flow connector, the pressure mechanism and the lid may be used in relation to a very wide variety of fluids.


Brief Description of the State of the Technology--Flow Connector

Commonly assigned European Patent Application No. 92301899.8 entitled "Air Activatable Polymerizable Compositions" describes novel compositions suitable for use as one component systems for forming polymers, requiring no primers. These compositions are useful as adhesives, sealants, surface coatings, moulding resins and composite matrices, for example. These compositions are particularly suitable for use as thread locking compounds e.g. for cementing nuts to threaded shafts, bushes to bush housings and the like. A characteristic of these novel compositions is rapid curing on contact with even the least quantity of air. This characteristic is particularly useful for automated mass production assembly using robots, whereby a composition may be applied as an adhesive to bond two assembly components together, and little curing time is required, so that high production volumes may be achieved. The exceptionally high reactivity of these compositions requires that storage, dispensing and application of the compositions be carried out using equipment which has been sealed to a very high degree against any ingress of air or other gases.
Ingress of air or other gases into a storage, dispensing and application system has two disadvantages. Firstly, air may activate or partially activate the liquid adhesive causing local thickening of the liquid adhesive which is undesirable and causing components which should be relatively movable to bond together. Secondly, there is the possibility that a gas may not activate the liquid adhesive in which case, during application of liquid adhesive, a bubble of gas may become entrained in the flow of liquid and be applied through an applicator to a surface to be bonded, with possibly serious effects on the quality of the bond produced.
Attempts to apply the novel compositions using existing applicators have resulted in premature curing within the applicators, causing the applicators to become blocked. Such premature cure is unacceptable for automated manufacture. The curing occurs because of the ingress of small quantities of air into the applicator, for example at joints or seals, through tubing with poor barrier properties, or through membranes such as bellows or diaphragms. Also, curing occurs in the applicator nozzle downstream of the valve, if the applicator includes this feature. We have overcome these problems by the invention of an applicator which is sealed to a very high degree and which is the subject of commonly assigned Irish Patent Application No. 940697, the disclosure of which is hereby expressly incorporated herein by reference.
For storage it has been found that a highly desirable piece of equipment is a single-use (disposable)

REFERENCES:
patent: 3589446 (1971-06-01), Bower
patent: 4421146 (1983-12-01), Bond et al.
patent: 4886189 (1989-12-01), Vanderjagt
patent: 5303732 (1994-04-01), Jonsson
patent: 5379918 (1995-01-01), Goto

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