The present invention involves a microwave popcorn bag adapted to contain a plurality of popcorn kernels to be heated and popped by the application of microwave energy. The microwave popcorn bag is formed from a sheet of material comprising a front panel, a back panel, and first and second gussets connected...http://www.google.es/patents/US6005234?utm_source=gb-gplus-sharePatente US6005234 - Microwave popcorn bag with cross mitre arrangement
Microwave popcorn bag with cross mitre arrangement
