EP 0773889 B1 19991110 - TAMPER EVIDENT SEAL AND TAPE
Title (en)
TAMPER EVIDENT SEAL AND TAPE
Title (de)
ORIGINALITÄTS-KLEBEBAND UND VERSCHLUSS
Title (fr)
BANDE ET FERMETURE APPORTANT LA PREUVE DE L'OUVERTURE FRAUDULEUSE
Publication
Application
Priority
- US 9509803 W 19950802
- US 28563994 A 19940802
- US 38813695 A 19950213
Abstract (en)
[origin: WO9604177A2] A tape or label for sealing a container that provides visual evidence if the seal is forced open or cooled below a breakdown temperature. The tape includes a plastic strip (20), a layer of ink (22) printed on a surface of the plastic strip, and a layer of pressure-sensitive adhesive (24). The tape can be incorporated into a bag (10) for sealing the bag closed. The tape includes an ink layer that is sandwiched between the plastic strip and the adhesive layer. The adhesive can be secured to portions of a bag to seal it closed. If the seal is forced open, the ink layer visibly delaminates from the plastic strip. The adhesive layer and the plastic strip are chosen to have different rates of shrinking when cooled, so that when the tape is cooled below its breakdown temperature, the ink layer delaminates. In an alternative embodiment of the tap, two layers of ink are printed onto the plastic strip. The first layer of ink is clear and is printed onto the untreated plastic strip in a pattern. The second layer of ink is opaque and is printed uniformly over the plastic strip and the clear ink after the plastic strip is treated.
IPC 1-7
IPC 8 full level
B65D 33/34 (2006.01); G09F 3/02 (2006.01)
CPC (source: EP US)
B65D 33/34 (2013.01 - EP US); G09F 3/0292 (2013.01 - EP); B65D 2401/00 (2020.05 - EP)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
WO 9604177 A2 19960215; WO 9604177 A3 19960509; AU 3210695 A 19960304; AU 697919 B2 19981022; CA 2196606 A1 19960215; CA 2196606 C 20040601; DE 69513291 D1 19991216; DE 69513291 T2 20000531; EP 0773889 A2 19970521; EP 0773889 B1 19991110; NZ 291083 A 19990429
DOCDB simple family (application)
US 9509803 W 19950802; AU 3210695 A 19950802; CA 2196606 A 19950802; DE 69513291 T 19950802; EP 95928278 A 19950802; NZ 29108395 A 19950802