Motorized air ring

Details Motorized air ring Motorized air ring

B - Operations, Transporting

29

C

B29C 49/58 (2006.01) B29C 47/88 (2006.01) B29C 47/92 (2006.01) B29C 49/00 (2006.01)

Patent

CA 2398511

The invention relates to an air ring for a blown film process, the air ring comprising: at least one air outlet for directing a stream of air outside the film; at least one component movable through a range of positions for controlling the air stream, said component being moveable to a set position within the range of positions for achieving a film of preselected properties; adjustor means for moving the component to any one of the positions; and output generating means for generating a unique output signal for each of said positions in said range to produce a unique signal representative of the set position. The invention also relates to methods of producing blown film. By providing output generating means to produce an output signal which identifies the positions of the components, component settings are reproducible and may be automated.

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