The present invention relates to sealed pouches, and apparatus and processes for producing the same. The pouch includes contoured first and second lateral edges, with each lateral edge having concave and convex surfaces. The concave surface of the first lateral edge is substantially opposite the convex...http://www.google.fr/patents/US6293073?utm_source=gb-gplus-shareBrevet US6293073 - Apparatus for forming a pouch
