Apparatus and method for stretching and taking-away polymer films
Abstract:
A film (50) processing apparatus (20) including a film stretching device (22) and a take-away device (24) and a film processing method using the apparatus. The take-away device receives the film after the stretching device and transports the film along a conveying region in a direction of transport (X). The take-away device includes opposing, first and second conveyor assemblies. The first conveyor assembly has a continuous belt driving a plurality of discrete pads (180a, 180b). Each pad forms a contact face (194a, 194b) extending between leading (200b) and trailing edges (202a). The pads are configured and arranged such that the trailing edge (202a) of a first pad (180a) overlaps the leading edge (200b) of an immediately adjacent second pad (180b) as the first and second pads traverse the conveying region. The overlap is characterized by a line (322) perpendicular to the direction of transport passing at any given moment through the first and second pads. A shape of the contact face can define a major central axis that is non-perpendicular and non-parallel with the direction of transport.
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