Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1989-06-21
1990-12-25
Ryan, Patrick
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428 342, 428 40, 428915, 428916, 283105, B32B 900
Patent
active
049802224
ABSTRACT:
A tamper indicating tape for use with a closure or container. The tape comprises a film including phase separated polymers. Colored indicia are applied to opposing major surfaces of the film indicative of a condition that someone has tampered with the tape, e.g., tape removal and reattachment, or abrading. The film further bears a layer of adhesive thereon as a means for adhering the tape to a portion of a container or to a closure tape on a can lid. When the film of the tamper indicating tape is sufficiently split, one set of colored indicia is obscured and the other set of colored indicia is rendered perceptible. When the film is abraded to remove the perceptible set of colored indicia, the aforementioned obscured set of colored indicia is rendered perceptible.
REFERENCES:
patent: 4454956 (1984-06-01), Patterson
patent: 4557505 (1985-12-01), Schaefer et al.
patent: 4630891 (1986-12-01), Li
patent: 4652473 (1987-03-01), Han
patent: 4785940 (1988-11-01), Wilson
patent: 4876123 (1989-10-01), Rivera et al.
Rivera Raymond R.
Vanvleet Stephen B.
Wilson Shari J.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Ryan Patrick
Sell Donald M.
Weinstein David L.
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