Vacuum packaging method and apparatus

Details Vacuum packaging method and apparatus Vacuum packaging method and apparatus

1987-01-28

1988-07-05

Spruill, Robert L.

Package making

Methods

With contents treating

53479, 53512, 53372, 53373, B65B 3100

Patent

active

047545968

ABSTRACT:
In a vacuum packaging apparatus for packaging relatively large articles, a rotary valve is provided over a turntable having a plurality of vacuum chambers at its periphery so that an amount of air is supplementarily discharged from a vacuum chamber into one of other vacuum chambers before a complete vacuum is made and that a small amount of atmospheric air is sucked into the chamber to shrink preliminarily a packaging bag before its open end is sealed.

REFERENCES:
patent: 2630955 (1953-03-01), Moses et al.
patent: 2740243 (1956-04-01), Mahaffy
patent: 3795085 (1974-03-01), Andre et al.
patent: 3958391 (1976-05-01), Kujubu
patent: 4578928 (1986-04-01), Andre et al.
patent: 4583347 (1986-04-01), Nielsen
patent: 4586320 (1986-05-01), Takai et al.

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