A vented bag includes a length of tubular gas-impervious material sealed to closure at at least one end thereof by a plurality of spaced apart seal lines each including a discontinuity proximate one end thereof. The discontinuities in adjacent ones of the seal lines are disposed proximate opposite ends...http://www.google.com/patents/US6491433?utm_source=gb-gplus-sharePatent US6491433 - Bag with venting means
