A media storage unit is made by z-folding either a joined or a continuous web of material planes forming a plurality of N overlaid material planes. The material planes have tabs extending from both non-folded sides symmetrical about a center line of each material plane. Slits are made starting on each...http://www.google.es/patents/US6419082?utm_source=gb-gplus-sharePatente US6419082 - Media storage unit with expandable and separable pockets
Media storage unit with expandable and separable pockets
