Patent ID: 9334088
Filing Date: 2016-05-10
CPC Classification: B05C,B65D,Y10T

Claim Text:
1. A dispensing device for an inter-reactive, multi-component composition comprising a plurality of collapsible bag compartments located within a substantially rigid housing, the housing being in the form of an elongate sleeve that acts as a guide tube for a compression device, wherein the compression device is a piston, and the compartments each housing a component of the multi-component composition, the compartments extending longitudinally, adjacent each other, within the sleeve and having transverse cross-sectional areas that are generally proportional to an intended volume mixing ratio for the multi-component composition, each compartment further having an opening at a dispensing end thereof that is able to communicate with a device outlet at one end of the housing, and an opposite, sealed end which is located within the guide tube and exposed to pressure from the compression device that in use acts to collapse the compartments simultaneously and dispense the components through the device outlet, wherein the dispensing device further comprises a manifold section downstream of the compartments, the manifold section providing a separate chamber for each component to flow through towards the device outlet and each chamber being provided with an aperture that the dispensing end of a compartment protrudes through for dispensing its component into the chamber, wherein the components have different viscosities at an operating pressure of the compression device, and wherein the chamber of a component that is less viscous at the operating pressure has been modified with a flow control regulator to compensate for extra lateral pressure exerted on the compartment of the less viscous component by an adjacent compartment containing a component that is more viscous at that operating pressure, the flow control regulator presenting a dynamic restriction to the flow of the less viscous component that acts to modify the ratio of the components dispensed at the device outlet to achieve a volume mixing ratio that is closer to the intended volume mixing ratio of the multi-component composition, wherein the aperture, through which the dispensing end of the collapsible bag compartment of the less viscous component protrudes, is the dynamic flow control regulator, the aperture being smaller than an opening the size of which is determined by the proportions of the intended volume mixing ratio, so that the aperture acts as a throttle to restrict the flow, thereby compensating the extra lateral forces exerted on its compartment by an adjacent compartment of a more viscous component, wherein the dynamic flow control regulator comprises a variable aperture that increases in size as more pressure is applied by the compression device and reduces in size when the pressure is removed to provide a dynamic restriction, and wherein the rates of flow for the components are substantially balanced so that the compartments are collapsed at equal rates, and dimensional stability of the compartments is maintained during use.