Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Production of continuous or running length
Patent
1992-05-19
1995-05-30
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Production of continuous or running length
52748, 264150, 264151, 264156, 2642095, 2642102, 2642356, 264178R, B29C 4734, B29C 5320
Patent
active
054198674
ABSTRACT:
A seamless tube useful in making a roofing batten is extruded from a polymeric material consisting essentially of a major amount of poly(ethylene terephthalate) and a minor amount of at least one polyolefin, flattened in a vacuum sizer so as to define two plies, and milled and drawn so as to orient the tube longitudinally. As milled and drawn, the tube is oriented so as to have a tensile strength of at least about 25,000 psi in a longitudinal direction. The plies are punched so as to have holes therethrough at spaced intervals along the tube. When used to make a roofing batten to coact with conventional fasteners, such as roofing screws, the tube exhibits superior characteristics of split resistance and pull-through resistance.
REFERENCES:
patent: 2358909 (1944-09-01), Davis
patent: 2690592 (1954-10-01), Schanz
patent: 4207045 (1980-06-01), Rasmussen
patent: 5049347 (1991-09-01), Magill et al.
patent: 5055244 (1991-10-01), Gohlisch
Rathgeber Juergen O.
Vadhar Parimal M.
Van Erden Donald L.
Wojcik John P.
Illinois Tool Works Inc.
Thurlow Jeffery
Vargot Mathieu
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