Patent ID: 6929594

Claim:
An apparatus comprising first and second multi-pulley assemblies, said first multi-pulley assembly comprising a first pulley, first and second belts respectively encasing said first and second multi-pulley assemblies and comprising mutually confronting portions, means for driving rotation of said first pulley, said first and second belts circulating in opposite directions when said first pulley is driven to rotate, a sealing station comprising a heat sealing mechanism and a cutting mechanism, and a zipper tape comprising a portion that is pressed between said confronting portions of said first and second belts after a first amount of rotation of said first pulley and disposed at said sealing station after a second amount of rotation of said first pulley subsequent to said first amount of pulley rotation, said zipper tape portion being moved lengthwise during said second amount of pulley rotation and then being heat sealed to bag making film by said heat sealing mechanism and severed from a remainder of said zipper tape by said cutting mechanism while said zipper tape portion is disposed at said sealing station.