US Patent 11931991 Packaging structures and additive manufacturing thereof

A packaging system includes a packaging unit and an article. The packaging unit includes a solid layer, a porous layer and a plastic layer with a cavity. The cavity is configured to receive and secure the article in an opening defined by the cavity that is flexible between a first and a second dimension. The packaging unit is fabricated by a 3D printing process. A tensioning device of a 3D printing machine tensions a feed filament during the 3D printing process.