Patent ID: 7695419

Claim:
A manufacturing method for a bag with zipper members, comprising: overlaying a bag film with a tape with a zipper member in which the zipper member is integrally formed on one surface side of a tape body of the tape such that the tape with the zipper member travels in a zipper member introducing groove formed in a circumferential direction of a rotary drum, the tape and the bag film moved by rotation of the rotary drum in the overlaid state; and continuously heat-sealing the tape with the zipper member to the bag film by a seal bar having a welding surface in a curved shape corresponding to a circumferential shape of the rotary drum, wherein a heat-insulating portion is provided on at least one of the tape body of the tape and the rotary drum so that heat applied by the seal bar to the tape with the zipper member is prevented from transferring to the rotary drum.