Tamper-evident tape having discontinuous barrier layer

Details Tamper-evident tape having discontinuous barrier layer Tamper-evident tape having discontinuous barrier layer

1993-12-06

1996-12-10

Watkins, III, William P.

Stock material or miscellaneous articles

Layer or component removable to expose adhesive

Polymer derived from material having at least one acrylic or...

428201, 428202, 428203, 428354, 428916, 428352, 428448, 428213, 428500, 428483, 428915, 383 5, 206807, 53485, 283108, 283 81, B42D 1500, B32B 712, B65D 5000

Patent

active

055828876

ABSTRACT:
Disclosed is a tamper-evident tape for applying over the flap or other opening in cellulosic substrates such as paper products, corrugated containers, cardboard boxes, shipping cartons and the like, which tape will provide evidence of tampering with its contents over a wide temperature range from above to below the Tg of the adhesive layer adhering the tape to the substrate. The tape has a transparent backing layer carrying on one side thereof a discontinuous layer of deposits of a transparent barrier material which is bonded to the backing layer and which prevents bonding of an underlying colored layer to the backing layer in areas where the barrier material is present.

REFERENCES:
patent: 3623944 (1971-11-01), Davis
patent: 3864855 (1975-02-01), Pekko et al.
patent: 4121003 (1978-10-01), Williams
patent: 4608288 (1986-08-01), Spindler
patent: 4763931 (1988-08-01), Matsuguchi et al.
patent: 5153042 (1992-10-01), Indrelie
patent: 5232527 (1993-08-01), Vernhey et al.
patent: 5277971 (1994-01-01), Weng et al.
patent: 5294470 (1994-03-01), Ewan

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