Method and apparatus for folding and cutting articles from a tubular thermoplastic envelope

Abstract From the Canadian patent

There is provided an apparatus for producing a plurality of longitudinally folded articles from an elongate, continuous, tubular envelope of thermoplastic material. Typically, these articles are bags such as garbage bags. Transverse seals are firstly provided across the tubular envelope at spaced-apart locations without, severing the same, and then folding means are provided downstream of the heat-sealing region, for folding the tubular envelope in a continuous way about a longitudinal line which is usually substantially midway of its width . Severing means are located downstream of the folding means for severing the tubular envelope transversely at or adjacent the transverse seals, to …