B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
222/58
B65D 83/14 (2006.01)
Patent
CA 1092069
ABSTRACT OF THE DISCLOSURE The invention provides a low pressure package or packaging system for dispensing a product of high viscosity, namely, 10,000 cps. or above at a pressure of only about 6-40 lbs. per sq. in. gauge (psig). The low pressure re- duces the safety hazard to practically zero, reduces the cost of the container very substantially and minimizes the use of metals, plastics and other scarce materials. The container is preferably provided with a barrier in the form of a piston, bag, disc or the like, to separate the product from the propellant. By reason of the low pressure, the wall of the con- tainer can be relatively thin, of the order of 0.005 inch or less in the case of aluminum in 2-inch diameter containers. The necessary thickness of materials other than aluminum (such as steel, plastic, paper board or laminates of metal, plastic and paper) will depend on their relative strengths. The use of such thin-walled containers lowers the cost of the package and at the same time renders the wall so flex- ible and pliable that the wall conforms to the piston or disc barrier which helps to prevent by-pass or escape of propellant gas and also allows the pressure inside to smooth out any dents occurring during transportation. The confor- mation of the wall to the barrier also permits almost com- plete expulsion of the product. The valve is provided with a sealing disc or head secured to a tiltable stem. The sealing disc is of consider- ably larger diameter than those of prior valves, and maybe three or four or more times the internal diameter of the stem. The disc hinges on a small portion of the perimeter to provide a passageway for the product extending throughout 360°.
278229
Diamond George B.
Meredith & Finlayson
LandOfFree
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