B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
B65D 55/00 (2006.01) B65D 50/00 (2006.01) B65D 55/02 (2006.01) B65D 79/00 (2006.01)
Patent
CA 2092090
A tamper evident coating (32) for a mechanical or vacuum actuated button (28) of a closure (20), which coating changes color after the closure has been applied to a container and then removed so that the closure cannot be reapplied and retain its in- itial coloring. The change in color indicates tampering. The coating includes a first layer (34) applied directly to the upper surface of the button and a second layer (36) of a different color applied in overlying and bonded relation to the first layer. The second layer is preferably transparent and the two colors are selected so that they produce a third color while the layers are bonded to- gether. The first layer may have an embossed upper surface including ribs and grooves with the second layer flowed thereinto. When the second layer is caused to shrink, mating can no longer be effected.
Continental White Cap Inc.
Osler Hoskin & Harcourt Llp
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