Abstract: The present invention is directed to a sealing unit for an autoclave for sterilizing contents packaged in pouches and sealing the latter, the sealing unit including a plurality of relatively movable pressure bars which are moved through a lost linkage connection such that open mouthed pouches which are held between opposing pairs of jaws by pairs of clips are first subjected to a sterilization media and thereafter are heat sealed closed.

Abstract: A process of packaging a solid gas evolving product by filling a plurality of pouches with the product, partially sealing each pouch mouth by a heat seal to leave a relatively small tortuous passage for the escape of gas from the product, transferring the pouches to a storage chamber containing oxygen at atmospheric conditions of temperature and pressure, storing the filled pouches in the chamber until substantially all of the gas capable of evolving from the product has evacuated the pouches, removing the pouches from the storage chamber and thereafter hermetically sealing the pouches against oxygen containing atmosphere by completely sealing each tortuous passage.

Abstract: The present invention is directed to a sealing unit for an autoclave for sterilizing contents packaged in pouches and sealing the latter, the sealing unit including a plurality of relatively movable pressure bars which are moved through the lost linkage connection such that open mouthed pouches which are held between opposing pairs of jaws by pairs of clips are first subjected to a sterilization media and thereafter are heat sealed closed.

Abstract: An aerosol container having a propellant means and a flexible product bag enclosed within a flexible deformable plastic container such as polyethylene. The propellant causes the product in the bag to discharge which reduces the volume of the product in the enclosing container thus reducing the pressure of the gas within the container to subatmospheric pressure. This collapses the container and is an indication that the contents have been used.

Abstract: A laminated film suitable as a food packaging film comprised of a base layer of an oriented polypropylene film, a layer of a vinylidene chloride polymer adhered to one surface of the base layer, a layer of first ethylene/vinyl acetate copolymer having a vinyl acetate content greater than 10 percent by weight adhered to the vinylidene chloride polymer layer and a top layer of a second ethylene/vinyl acetate copolymer having a vinyl acetate content less than 10 percent adhered to the first ethylene/vinyl acetate copolymer layer.BACKGROUND OF THE INVENTION1. Field of the InventionThis application is a continuation-in-part of copending application Ser. No. 81,941 filed Oct. 19, 1970, and now abandoned.This invention relates to an improved packaging film and more particularly relates to a laminated packaging film having low permeability to gases and a method for the preparation thereof.2.