Striped film and apparatus and method

Details Striped film and apparatus and method Striped film and apparatus and method

1992-01-24

1994-03-29

Ryan, Patrick J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428 3409, 428 3502, 428195, 428206, 428207, 428221, 428232, 428913, 428915, 428916, 428 343, 428 352, B32B 900

Patent

active

052983102

ABSTRACT:
Striped films of the invention can have two or more preferably polymeric layers, of which at least one continuous or discontinuous layer includes a pigmented resin. The striped film is produced by modifying conventional coextrusion dies to restrict the flow of a pigmented melt stream. The result is a striped film useful for identifying the contents of a package made from the film, tamper evidence, counterfeit protection and verification of properties. The stripes can be of one or more colors, and vary in width and spacing. The pigment can be a material visible in ordinary light, or a material invisible in ordinary light but visible in e.g. ultraviolet light.

REFERENCES:
patent: 2808617 (1952-09-01), Terracini et al.
patent: 3565737 (1965-11-01), Lefevre et al.
patent: 4327136 (1982-04-01), Thompson et al.
patent: 4552789 (1985-11-01), Winchell
patent: 4737391 (1988-04-01), Lustig et al.
patent: 4837956 (1989-06-01), Dolence
patent: 4923551 (1990-05-01), Wagers et al.

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