In an easy-to-open chocolate package, the wrapper has two areas (2, 3,23', 24') where the packing material is folded in two, made of two layers of packing material sealed together by their inner side, lying on an essentially even upper surface of the wrapper and laterally enclosing a tearing up zone...http://www.google.com.au/patents/US4917247?utm_source=gb-gplus-sharePatent US4917247 - Package for packing pieces of goods
