Method and device for evacuating gas tight envelope

Details Method and device for evacuating gas tight envelope Method and device for evacuating gas tight envelope

1996-02-05

1999-03-02

Moon, Daniel B.

Package making

Methods

With contents treating

B65B 3100

Patent

active

058756132

ABSTRACT:
An improved method and device are provided for evacuating gas from a gas tight envelope such as a bag of plastic film, enclosing one or more trays containing solid or granular material. The vacuum probe used in accordance with the invention to evacuate the envelope has one or more parallel grooves or apertures extending its length. The probe is inserted vertically into the envelope along the side of the tray and provides a vacuum, across the length of the probe to prevent blocking of the probe and ceasing evacuation of the gas.

REFERENCES:
patent: 3185371 (1965-05-01), Reifers
patent: 3468412 (1969-09-01), Forman
patent: 3696580 (1972-10-01), Saltzer
patent: 4188769 (1980-02-01), Bright
patent: 4685274 (1987-08-01), Garwood
patent: 5103618 (1992-04-01), Garwood
patent: 5109654 (1992-05-01), Suga
patent: 5491957 (1996-02-01), Maskell

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