Oriented plastic strap

Details Oriented plastic strap Oriented plastic strap

1995-09-14

1997-01-28

Ryan, Patrick

Stock material or miscellaneous articles

Structurally defined web or sheet

Edge feature

428 37, 428111, 428147, 428220, 428337, 428409, 4284111, 425 66, 425296, 204280, 2042884, B32B 900

Patent

active

055976409

ABSTRACT:
An apparatus and method for producing an oriented plastic strap having a predetermined desired thickness 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 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. Additional heating is provided in connection with the surface of the sheet workpiece which is exposed to the ambient air prior to entry of the workpiece into the nip defined between the pair of rollers such that both surfaces will have similar temperature levels so as to exhibit similar density properties, and still further, the edge portions of the sheet workpiece are also heated so as to advantageously control the degree of flatness of the sheet material or workpiece across the width thereof. The flatness quality of the sheet workpiece can also be achieved through means of specially contoured milling rollers defining the zero gap assembly nip, or by means of specially contoured extrusion dies, whereby the edge portions are rendered thinner as compared to the central portion of the sheet workpiece such that upon milling and stretching of the workpiece, which operations tend to thicken the edge portions of the sheet workpiece, the edge portions will exhibit thickness dimensions commensurate with the thickness dimension of the central portion of the sheet workpiece.

REFERENCES:
patent: Re33258 (1990-07-01), Onik et al.
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: 3376601 (1968-04-01), Seanor et al.
patent: 3394045 (1968-07-01), Gould
patent: 3619460 (1971-11-01), Chill
patent: 3651196 (1972-03-01), Starkweather, Jr.
patent: 3752161 (1973-08-01), Bent
patent: 4038012 (1977-07-01), Sander
patent: 4084594 (1978-04-01), Mosior
patent: 4111207 (1978-09-01), Seiler, Jr.
patent: 4201213 (1980-05-01), Townsend
patent: 4282884 (1981-08-01), Boebel
patent: 4369788 (1983-01-01), Goald
patent: 4408974 (1983-10-01), Comerio
patent: 4428720 (1984-01-01), Van Erden et al.
patent: 4545374 (1985-10-01), Jacobson
patent: 4589414 (1986-05-01), Yoshida et al.
patent: 4722338 (1988-02-01), Wright et al.
patent: 4733663 (1988-03-01), Farley
patent: 4777948 (1988-10-01), Wright
patent: 4990148 (1991-02-01), Worrick, III et al.
patent: 5026375 (1991-06-01), Linovitz et al.
patent: 5049347 (1991-09-01), Magill et al.
patent: 5061269 (1991-10-01), Muller
patent: 5176695 (1993-01-01), Dulebohn
patent: 5242439 (1993-09-01), Larsen et al.
patent: 5273519 (1993-12-01), Koros et al.
patent: 5312407 (1994-05-01), Carter
patent: 5336238 (1994-08-01), Holmes et al.
patent: 5342391 (1994-08-01), Foshee et al.
patent: 5385570 (1995-01-01), Chin et al.
patent: 5387388 (1995-02-01), Van Erden et al.
patent: 5405699 (1995-04-01), Van Erden et al.
patent: 5451227 (1995-09-01), Michaelson

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