Abstract: A method of making a package includes the steps of folding a thermoplastic film web along its longitudinal axis to make a centerfolded film web having two plies which define a folded longitudinal edge and an open longitudinal edge; forming the centerfolded film into a tube such that the folded longitudinal edge is in transversely overlapping relationship with the open longitudinal edge, preferably such that the folded longitudinal edge is inside the tube, and the open longitudinal edge is outside the tube; longitudinally sealing the tube; closing a first end of the tube; filling the tube with a product; closing a second end of the tube to define a tube segment; and separating the tube segment to make a package. The film web is optionally printed before being folded to make a centerfolded film web.

Abstract: A method is provided for enhancing yield of a cook-in packaged food product that includes first providing an adhering cook-in package comprising a flexible plastic container being substantially conformable to a selected food product and having an inner surface of polymeric olefin having been subjected to an adhering surface treatment in the presence of oxygen, then conforming said package about a selected food product and cooking the packaged product, whereupon said inner package surface adheres to said food product to substantially prevent cook-out of fluids therefrom.