초록 ▼

Tamper indicating label having strong protective film applied to a relatively fragile base film having adhesive on the opposite side. Sets of indicia and masking layers are printed on the label base with inks of differing adhesivity and overlain by a layer of clear polymeric material such as an ink

Tamper indicating label having strong protective film applied to a relatively fragile base film having adhesive on the opposite side. Sets of indicia and masking layers are printed on the label base with inks of differing adhesivity and overlain by a layer of clear polymeric material such as an ink residue having relatively low adhesivity to the label base but good adhesivity to the masking layers.

대표청구항 ▼

A laminate especially suited as a tamper indicating label consisting essentially of (a) first and second polymeric plies, said first polymeric ply being substantially transparent and having a tensile strength at least 40% greater than said second polymeric ply, (b) first and second tacky and cohesiv

A laminate especially suited as a tamper indicating label consisting essentially of (a) first and second polymeric plies, said first polymeric ply being substantially transparent and having a tensile strength at least 40% greater than said second polymeric ply, (b) first and second tacky and cohesive pressure sensitive adhesive layers, (c) first and second sets of indicia printed on said second polymeric ply, (d) masking coating over said first set of indicia but not over said second set of indicia and (e) a transparent or tinted polymeric coating over said masking coating, said second set of indicia and said second polymeric ply, said polymeric coating having low adhesivity to said first pressure sensitive adhesive layer, said second set of indicia and one of said masking coating and said first set of indicia having substantially greater adhesivity to said second polymeric ply than the other of said masking coating and said first set of indicia whereby before tampering said second set of indicia is fully visible and said first set of indicia is not visible when said laminate is adhesively attached to a substrate by said second pressure sensitive adhesive layer and tampering reveals said second polymeric ply bearing fully visible both said first set of indicia and said second set of indicia.