Liquid inert gas dispenser and control

Details Liquid inert gas dispenser and control Liquid inert gas dispenser and control

1984-10-12

1987-05-05

Spruill, Robert L.

Package making

Methods

With contents treating

53 53, 53111R, 53510, 141 51, 141 83, 141 95, 141100, 2221466, 222478, B65B 5518

Patent

active

046621547

ABSTRACT:
A control system for providing a closed loop control circuit between a liquid nitrogen dispenser and apparatus for determining internal pressure within a closed can having liquid nitrogen applied thereto whereby the automatic controlling of the volume of liquid nitrogen dispensed into each can is effected. Control data from a pressure test unit is averaged and the average is compared to a preselected set point and converted into a pulse of a width varying in accordance with the average detected pressure of previously filled cans to control the time of dispensing and thus the volume of dispensed liquid nitrogen.

REFERENCES:
patent: 3802252 (1974-04-01), Hayward et al.
patent: 3881095 (1975-04-01), Taylor et al.
patent: 4316490 (1982-02-01), Meyer
patent: 4489767 (1984-12-01), Yamada
patent: 4494582 (1985-01-01), Meyer

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