Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1991-03-21
1992-07-07
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
264 403, 264 407, 264503, 264566, 264569, 264146, 425140, 425141, 425142, 425163, 425315, 4253261, 425381, B29C 4792
Patent
active
051280760
ABSTRACT:
An open tube apparatus and method for continuously producing a rotating elongate strip of material are disclosed. An extrusion die continuously extrudes flowable material to form an open tube with a central longitudinal cavity and a transport mechanism includes a plurality of drive rollers which engage and pull the tube downline. A driver rotates the extrusion die and transport mechanism. A tube cutter, which is offset at an angle with respect to the downline direction and defines the open end of the tube, cuts the tube into a continuous elongate web of the desired width as the tube moves downline. An air seal seals the tube cavity to prevent air from escaping through the open end of the cavity, and a tube pressurizer controls air pressure in the central longitudinal cavity of the tube to expand the tube laterally outwardly.
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Akselrod Anatoly
Berman Mark A.
Cysewski James B.
Lenius Steven J.
Louks John W.
Griswold Gary L.
Kirn Walter N.
Levine Charles D.
Minnesota Mining and Manufacturing Company
Thurlow Jeffery
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