Method of making a pressure-operated container for viscous produ

Details Method of making a pressure-operated container for viscous produ Method of making a pressure-operated container for viscous produ

1977-01-18

1978-03-14

McGehee, Travis S.

Package making

Interrelated or safety controls

53 43, B65B 3100

Patent

active

040783596

ABSTRACT:
The invention contemplates a method of product-loading a pressure-operated dispensing container upon the head end of a selected piston whereby the weight of loaded product so axially compresses a locally resilient band of the selected piston that the piston automatically flexes in radially outwardly loaded contour-conforming contact with the adjacent container inner-wall surface. Upon thereafter closing the product-loaded end of the container and providing a super-atmospheric charge of pressurized gas in the remaining volume within the piston, piston-seal contact is enhanced to prevent product seepage past the resilient band.

REFERENCES:
patent: 3022923 (1962-02-01), Hoffman
patent: 3981119 (1976-09-01), Schultz

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