reclosable bags , plastic film for making the bags , and a method and apparatus for making the bags are disclosed . the bag has a reclosable fastener connected to a single wall of the bag , and the film has a reclosable fastener connected to one side thereof which does not require attachment to any other portion of the film when making a bag . the fastener has a tamper - proof member attached thereto to indicate if the bag has been previously opened . the film can be wound into a roll suitable for use on conventional bag making machines including form , fill , and seal machines or a chain of coilable reclosable bags can be produced therefrom since the fasteners are connected to the web preferably transversely to the bags longitudinal formation axis . the method and apparatus for making the film includes supplying a continuous web of bag making material , feeding from a coil of continuous fastener material enough fastener material to make a single fastener , positioning , cutting , and attaching the fastener to the film , with a plurality of fasteners attached thereon .