Films and Methods for Making Tampering Events Evident
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United States of America Patent
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Issued Date -
Jun 9, 2011
app pub date -
Apr 6, 2009
filing date -
Apr 4, 2008
priority date (Note) -
Abandoned
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Abstract
Films and methods for making tampering events obvious are disclosed. In one embodiment, a tamper evident film includes a coating containing a first substance, and an observable change occurs when the first substance comes into contact with a second substance. In another embodiment, a tamper evident stretch wrap includes an inner portion, an outer portion, and a substance between the inner and outer portions that is adapted to escape from between the portions when the outer portion is breached. In another embodiment, a tamper evident stretch wrap includes a first layer of film having a first pattern and a second layer of film having a second pattern that overlap to form a predetermined third pattern. In yet another embodiment, a stretch wrap is exposed to ultraviolet light and checked for a change in a fluorescent signature to determine whether the stretch wrap has been breached.
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