Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to work – Extrusion molding
Patent
1995-06-07
1997-08-26
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
Direct application of electrical or wave energy to work
Extrusion molding
2642101, 264280, 2642884, 264481, B29C 3510, B29C 4322, B29C 4700
Patent
active
056607873
ABSTRACT:
An apparatus and method for producing an oriented plastic strap having a predetermined desired thickness and flatness characteristics for use in connection with the strapping of packages or the like, is disclosed. A sheet workpiece is conducted into a nip defined between a pair of opposed milling and stretching rollers wherein one of the rollers is rotated at a lineal surface velocity which is greater than the lineal surface velocity of the other roller, and the rollers are rotated in opposite directions. One of the rollers effectively brakes or retards one of the surfaces of the sheet workpiece while the other one of the rollers effectively accelerates the other one of the surfaces of the sheet workpiece as the workpiece passes through the nip defined between the rollers whereby the workpiece is simultaneously milled and stretched. The workpiece is heated along its side portions disposed inwardly from the side edge portions so as to eliminate concavities and bump transitional points which normally tend to form at and within the vicinity of the side portions, and in addition, the side edge portions of the sheet workpiece are also heated so as to cooperate with the heated, axially inward side portions so as to advantageously control the degree of flatness of the sheet workpiece across the width thereof after the same has been milled and stretched.
REFERENCES:
patent: 2326927 (1943-08-01), Conrad
patent: 2471392 (1949-05-01), Campbell
patent: 3083410 (1963-04-01), McGlamery
patent: 3290420 (1966-12-01), Orser
patent: 3351697 (1967-11-01), Hufnagel et al.
patent: 3354023 (1967-11-01), Dunnington et al.
patent: 3394045 (1968-07-01), Gould
patent: 3499957 (1970-03-01), Ancker
patent: 3619460 (1971-11-01), Chill
patent: 3651196 (1972-03-01), Starkweather, Jr.
patent: 3741702 (1973-06-01), Mazzoni
patent: 3761217 (1973-09-01), Mambretti
patent: 3800008 (1974-03-01), Starkweather, Jr.
patent: 3956517 (1976-05-01), Curry et al.
patent: 4022863 (1977-05-01), Karass et al.
patent: 4038012 (1977-07-01), Sander
patent: 4117054 (1978-09-01), Salo
patent: 4118454 (1978-10-01), Miki et al.
patent: 4152475 (1979-05-01), Haley
patent: 4311658 (1982-01-01), Nicoll
patent: 4408974 (1983-10-01), Comerio
patent: 4428720 (1984-01-01), Van Erden et al.
patent: 4495124 (1985-01-01), Van Erden et al.
patent: 4503007 (1985-03-01), Matsumoto
patent: 4596523 (1986-06-01), Whitehead
patent: 4643865 (1987-02-01), Okada et al.
patent: 4681723 (1987-07-01), Jester
patent: 4849234 (1989-07-01), Spinelli et al.
patent: 5049347 (1991-09-01), Magill et al.
patent: 5137661 (1992-08-01), Kanome et al.
Principles of Polymer Processing, Tadmor and Gogos, pp. 363-372; 442-447; 661-663 (1979).
Enriquez Manuel C.
Van Erden Donald L.
Illinois Tool Works Inc.
Tentoni Leo B.
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