Method and apparatus for pressurizing containers

Details Method and apparatus for pressurizing containers Method and apparatus for pressurizing containers

1983-07-19

1986-04-22

Sipos, John

Package making

Methods

With contents treating

53111R, 141 6, 141 51, 141 67, B65B 5500

Patent

active

045833460

ABSTRACT:
Pressurization of containers with liquid nitrogen to impart container strength and content protection is effected by injecting a small quantity of liquid nitrogen before sealing the container by the methods and apparatus including a gas pressure system wherein liquid nitrogen is maintained by control means at a constant pressure with nitrogen gas being separated from liquid nitrogen before dispensing and a recirculating pump pressure system wherein liquid nitrogen from a second of two supplies is pumped through a conduit to a dispensing gun and surplus liquid and gas is returned to the supply.

REFERENCES:
patent: 2387894 (1945-10-01), Fannin
patent: 2643807 (1953-06-01), Gialanella
patent: 3877358 (1975-04-01), Karr
patent: 3881636 (1975-05-01), D'Aubreby
patent: 4407340 (1983-10-01), Jensen et al.

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