Tamper-evident closure apparatus

Details Tamper-evident closure apparatus Tamper-evident closure apparatus

1984-12-24

1986-05-27

Norton, Donald F.

Bottles and jars

Closures

Including visual indicia

215260, 206459, 206807, B65D 5502

Patent

active

045910626

ABSTRACT:
Tamper-evident closure apparatus for internally pressurized containers includes a closure provided with a mechanism for venting the internal pressurized gas upon initial unsealing of the container and a tamper-indicating device adapted to be acted upon by the vented gas to indicate that an initial unsealing of the container has occurred. The tamper-indicating device may be, for example, chemically activated to change colors when acted upon by the vented gas or may be mechanically activated so that venting of the pressurized gas causes a visibly apparent disruption, distortion or the like to indicate initial unsealing of the container.

REFERENCES:
patent: 3369689 (1968-02-01), Dodge
patent: 3899295 (1975-08-01), Halpern
patent: 3966071 (1976-06-01), Northup
patent: 3976216 (1976-08-01), Lambert
patent: 4392579 (1983-07-01), Uhlig et al.
patent: 4511052 (1985-04-01), Klein et al.

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