Patent ID: 6883295

Claim:
A process comprising the following steps: advancing two continuous external webs, facing one another, in an advancement direction, to at least one insertion zone where a third, continuous central web is inserted between said external webs; forming pouches from said external webs and said central web, after inserting of said central web, by introducing, at a forming station, said external webs and said central web between half-mould compartments, having a shape corresponding to a final shape of said pouches, and injecting a forming fluid between said external webs and said central web through an opening so as to expand said external webs against said compartments; welding said central web to said external webs along a peripheral zone of said pouches and along an outline of each pouch so as that said opening remains; filling each pouch with a product through said opening at a filling station; and sealing each pouch by closing said opening.