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US 5,700,488 AGranted
Gauge band randomizer
AssigneeAddex Design, Inc.
InventorsRobert E. Cree, Ricardo P. Rodriguez
Life of this patent
Estimating the term…
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AssigneeAddex Design, Inc.
InventorsRobert E. Cree, Ricardo P. Rodriguez
Estimating the term…
An oscillating hauloff device for removing blown film from an extruding apparatus. The oscillating hauloff includes a stacked ring arrangement which provides a compact and stable structure. The turning bars and idler rolls are encompassed in the ring structure and are arranged to cancel effects of web wandering and wrinkling. A method for making the oscillating hauloff, including CNC machining of annealed ring-shaped weldments, that is economical and simple to manufacture. The turning bars are provided with reinforcements that prevent deflection of the turning bars during use. Further the turning bars are provided with flow restricted outlets and axially extending channels to supply uniform air pressure to float the blown film on the turning bars. A specific arrangement for providing utility services to the oscillating hauloff is also disclosed which employs torsional deflection of the loads during rotation of the rings. The oscillating hauloff is suitable for receiving film extruded downwards with only minor adjustments in structure from the unit for upwardly extruded film.
A turning bar assembly for an oscillatory hauloff of a blown film line wherein an assembly of idler rolls and turning bars rotatably shift their relationship to one another over time in a predetermined manner to enable the film to have gauge variations distributed back and forth across the width of the film, the turning bar assembly including a turning bar and a backing bar, said backing bar engaging the outside surface of said turning bar at locations along the length of the turning bar, said backing bar being constructed and arranged to reinforce said turning bar against deflection under tension applied by the film to the turning bar.
A turning bar for an oscillatory hauloff of a blown film line wherein an assembly of idler rolls and turning bars rotatably shift their relationship to one another over time in a predetermined manner to enable the film to have gauge variations distributed back and forth across the width of the film, the turning bar having
Dependencies are inferred from the claim text.