G - Physics – 09 – F
Patent
G - Physics
09
F
G09F 3/03 (2006.01) B65D 55/02 (2006.01) C09J 7/02 (2006.01)
Patent
CA 2090021
2090021 9203502 PCTABS00011 The present invention relates to a tamper-indicating tape for use with a container to indicate opening of the container. U.S Patent No. 4,876,123 discloses a tamper-indicating tape for securing a first container part to a second container part to enclose an opening in the container. The tamper-indicating tape includes a light-transmissive monolayer film having opposing first and second major surfaces. In order to prepare the tamper-indicating tape, it is necessary to print first colored indicia and second colored indicia in such a manner so as to obscure the indicia in the absence of tampering. This requirement is difficult to fullfill, because perfect registration and good color matching between the ink of the indicia and the dye or pigment of the adhesive is required. This invention provides a tamper-indicating tape (10) comprising a light transmissive monolayer film (12) having opposing first and second major surfaces (20, 24). On each surface is printed colored indicia (22, 26), preferably identical, such that the colored indicia on each surface obscure the colored indicia on the opposint surface when the film has not been split internally, but neither of the colored indicia obscure the other when the film has been split internally. The printing pattern of this invention dispenses with the requirement for accurate registration between first colored indicia and second colored indicia. The printing pattern further dispenses with the requirement for a color match between ink and adhesive.
Minnesota Mining And Manufacturing Company
Smart & Biggar
LandOfFree
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