Patent ID: 7406810

Claim:
A method of fabricating reclosable bags, the method comprising: disposing a releasably engaged closure between a first bag film portion and a second bag film portion, the closure comprising a loop-engageable fastener strip and a loop strip, the loop-engageable fastener strip comprising an array of loop-engageable fastener elements integrally molded with and extending from a sheet-form resin substrate, the loop strip comprising a plurality of loops carried on a sheet-form resin base, the loop-engageable fastener elements being engaged with the loops; and applying energy to a bonding region of the first bag film portion adjacent the loop-engageable fastener strip and to a bonding region of the second bag film portion adjacent the loop strip, the energy bonding the resin substrate of the loop-engageable fastener strip to the first bag film portion and bonding the resin base of the loop strip to the second bag film portion, wherein the engaged loop-engageable fastener elements and loops define insulating air pockets therebetween, the insulating air pockets substantially preventing the loop-engageable fastener strip from becoming permanently bonded to the loop strip when the energy is applied to the first and second bag film portions.