Patent ID: 6460317
Filing Date: 2002-10-08
Classification: B65B

Abstract:
A device for manufacturing thermoplastic sacks, comprising:a forward draw unit for intermittently pulling forward a thermoplastic blown film web and for a hanging feed of said blown film web in a vertical direction through a cross welding and cross severing mechanism which provides a leading end of the blown film web with a bottom weld and severs from said web a tubular segment above a gripping and transport mechanism, said tubular segment directed after said cross severing mechanism into a substantially vertical feed path; a wall substantially parallel to said feed path of said blown film web tubular segment; a cooling device located in a bottom end region of said feed path for cooling said bottom weld, said cooling device including a first pair of jaws, at least one of said jaws being pivotable to swing toward said bottom weld; an air nozzle element located in an upper region of said feed path for blowing air downwardly in-between said wall and said feed path to assist downward movement of said tubular segment; to said cooling device.