Patent ID: 7201273

Claim:
An air packing bag comprising: an upper sheet; a lower sheet; a plurality of seals formed on the upper and lower sheets defining a plurality of bladders; an air passage formed across the plurality of bladders; a film check valve disposed in each bladder, the film check valve in communication with the air passage, the film check valve comprising: a lower film located between the upper sheet and the lower sheet; an upper film located between the upper sheet and the lower film; an intermediate heat-proof member separating the upper film and the lower film; a plurality of spaced apart coupling points disposed within the bladder and further being spaced from the plurality of seals defining that bladder, the coupling points coupling the upper and lower films to each other at each coupling point location, the coupling points further coupling the upper and lower films to the upper sheet at each coupling point location such that when the bladder is under inflation the lower film and the upper film are urged against the upper sheet thus blocking air or other inert gas from leaving the bladder.