Apparatus for forming containers

An apparatus for forming tubular containers having a square to rectangular cross section and a bottom from planar heat-sealable sheets comprising:

• an apparatus frame having a plurality of treating stations including a planar sheet feed station,
• a rotary body having radial mandrels and intermittently drivingly rotatable so as to stop each of the mandrels at the plurality of treating stations successively,
• holding means provided on each of the mandrels for holding the planar sheet to the mandrel,
• a feeder for feeding the planar sheet to the holding means at the planar sheet feed station, and
• a series of means including tube-forming folding means and bottom-forming closing means, said series of means arranged one after another along the path of movement of the mandrels extending from the planar sheet feed station, the tube-forming folding means for folding the planar sheet held by the holding means around the mandrel into a tube and the bottom-forming closing means for closing one end of the sheet folded around the mandrel to provide the bottom and form the container such that the planar sheet is wrapped around the mandrel by said tube-forming folding means at a location along the path of movement of the mandrels between the planar sheet feed station and said bottom-forming closing means.