초록

A process and apparatus for forming, filling, sealing and deflating a package of goods prior to the time the fill opening is sealed includes a blast of air against the exterior flexible sidewalls of the package to thereby drive gas from the inside of the package.

대표청구항 ▼

A process for deflating a container, comprising, forming a container with a closed bottom, sidewalls and an opening, the sidewalls being of gas impermeable and flexible material, supplying the flexible material as a sheet and shaping said sheet into a tube with the longitudinal edges bonded together

A process for deflating a container, comprising, forming a container with a closed bottom, sidewalls and an opening, the sidewalls being of gas impermeable and flexible material, supplying the flexible material as a sheet and shaping said sheet into a tube with the longitudinal edges bonded together, sealing the leading end of the tube to define said closed bottom of the container, placing goods in the container through the opening, directing a blast of air against the exterior surface of each sidewall to urge said sidewalls toward each other and thereby drive gas out of the container through said opening, the blasts of air being substantially equal to magnitude and opposite in direction to impinge only on the sidewalls above the level of the goods in the container, sealing the opening to prevent the return of the gas to the container, the location of said blasts being below the level of said sealing, stopping the blasts of air prior to said sealing of the opening.