Apparatus and method for reducing plastic film neck-in

Details Apparatus and method for reducing plastic film neck-in Apparatus and method for reducing plastic film neck-in

1991-07-23

1992-09-15

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

264556, 264571, 264216, 425 721, 425224, 425388, 4253261, 4253871, B29C 4152

Patent

active

051475952

ABSTRACT:
Apparatus for stabilizing and reducing neck-in and edge thickness of a hot-plastic web including a pair of nozzle assemblies located at spaced edges of the web. Each nozzle assembly includes a pair of elongated nozzle elements which direct a pair of gaseous flows along opposed sides of the web transverse to the direction of movement of the web and toward an edge thereof.

REFERENCES:
patent: 2736056 (1956-02-01), Toulmin, Jr.
patent: 3444585 (1969-05-01), Watanabe
patent: 3597515 (1971-08-01), Widiger
patent: 4017575 (1977-04-01), Heyer
patent: 4505657 (1985-03-01), Ikeya
patent: 4728277 (1988-03-01), Planeta
patent: 5030409 (1991-07-01), Hisanaga et al.

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