EP 0306527 A4 19890724 - FRESHNESS AND TAMPER MONITORING CLOSURE.
Title (en)
FRESHNESS AND TAMPER MONITORING CLOSURE.
Title (de)
VERSCHLUSSVORRICHTUNG ZUM ÜBERPRÜFEN DER FRISCHHEIT EINES PRODUKTES UND ZUM ANZEIGEN EINES UNERLAUBTEN ÖFFNENS.
Title (fr)
FERMETURE PERMETTANT DE VERIFIER LA FRAICHEUR DU PRODUIT ET DE DETECTER UNE EVENTUELLE ALTERATION OU TENTATIVE D'OUVERTURE FRAUDULEUSE.
Publication
Application
Priority
US 3151387 A 19870327
Abstract (en)
[origin: WO8807481A1] A closure (10) for containers (12) having a circumferential groove (22) formed by opposed conical surfaces (24, 26) of substantially equal size in the relaxed condition and upon compression of the closure (10) forming a substantially toroidal circumferential groove. On a container (12) sealed with the closure (10) compressed, expansion of the circumferential groove (22) to the relaxed condition indicates failure of the seal or generation of gases within the container (12). In an alternate embodiment the circumferential conical surfaces (124, 126) form a V-shaped circumferential protrusion (128) in the compressed condition. In another embodiment the circumferential juncture between the conical surfaces and the closure sidewall is modified to reduce the flexure between the compressed and expanded conditions thereby permitting a wider variety of materials to be used for the closures.
IPC 1-7
IPC 8 full level
B65D 51/16 (2006.01); B65D 79/00 (2006.01); B65D 81/20 (2006.01)
CPC (source: EP US)
B65D 79/0087 (2020.05 - EP US)
Citation (search report)
- No relevant documents have been disclosed.
- See references of WO 8807481A1
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
WO 8807481 A1 19881006; EP 0306527 A1 19890315; EP 0306527 A4 19890724; JP H02503414 A 19901018
DOCDB simple family (application)
US 8801035 W 19880325; EP 88903673 A 19880325; JP 50342488 A 19880325