Verfahren und Vorrichtung zum kontinuierlichen Formen von Beuteln

摘要

A method for continuously forming bags comprising continuous steps of heat-sealing a continuous tubular plastic film (2), such as a continuously formed inflation tube or the like, widthwise at given positions thereof while the tubular film (2) is being conveyed, cutting sequentially the tubular film along the heat-seals (3) into bag-shaped containers (1), and conveying the tubular film (2) over a set distance to a following step while the heat-seals (3) of the heat-sealed tubular film (2) being press-held and cooled. An apparatus for performing the above method comprises a heat-sealing device (15) for sealing the tubular film (2) including a pair of heat-sealing members (19) which are disposed on one side of a track of conveyance of the tubular film (2), opposing each other so as to hold the tubular film (2) therebetween, and are movable to and from each other, a driving device (22) for driving the heat-sealing members to and from each other, a cooling device (25) for cooling the tubular film (2) including a pair of cooling sandwiching members (33) which are supported on a movable member disposed movably in directions of width of the tubular film and conveyance thereof, and intrude inbetween the heat-sealing members (33) to sandwich the heat-seals (3) of the tubular film, and a driving device (36) for driving the cooling sandwiching members to and from each other, whereby the tubular film (2) is conveyed by a movement of the movable member to a next step with those parts of the tubular film (2) that form the heat seals (3), being held between the cooling sandwiching members (33).