a method and apparatus for producing thermoplastic bags from an elongate web . apparatus for feeding the web includes devices for producing mounting holes and perforations along a circular path surrounding the holes . the web is severed and sealed to produce sheets containing a mounting hole encircled by the perforations . a selected number of successive sheets are impaled on a post projecting through the holes . a stack having a selected number of sheets is accumulated on a post fixed to a support supporting a medial zone of the sheets which are combined by a heated punch penetrating the sheets in the area enclosed by the perforations .