Abstract

A security label (14, 14') for transport, the security label (14, 14') comprising: end portions (14a) each having a printed graphics layer (30), an adhesive layer (24) structured to adhere the end portion (14a) to a surface, and a selective release layer (18) comprising a differential release pattern structured to cause the printed graphics layer (30) to selectively release and tear into a pattern when the end portion (14a) is removed from the surface; and a central portion (14b) spanning between the end portions (14a), the central portion (14b) having a linear diffraction grating layer (20), wherein the central portion (14b) does not include the adhesive layer (24), or wherein the adhesive layer (24) extends over at least a part of the central portion (14b) and the security label (14') further includes a protective layer (26') which is mounted on the portions of adhesive layer (24) in the central portion (14b).

IPC Classes  ?

• G09F 3/02 - Forms or constructions
• G09F 3/00 - Labels, tag tickets, or similar identification or indication meansSealsPostage or like stamps
• G09F 3/03 - Forms or constructions of security seals
• G09F 3/10 - Fastening or securing by means not forming part of the material of the label itself by an adhesive layer

Abstract

A security device, including at least first and second embossed, reflective metal diffraction gratings in respective regions: wherein the first diffraction grating exhibits, in incident white light, a zero-order output over a first area of substantially uniform grating period, wherein the zero-order output of the first diffraction grating comprises different coloured first and second sub-outputs for respective first and second polarisations parallel and perpendicular to the first diffraction grating; wherein the second diffraction grating exhibits, in incident white light, a zero-order output over a second area of substantially uniform grating period; wherein the zero-order output of the second diffraction grating comprises third and fourth sub-outputs for respective first and second polarisations parallel and perpendicular to the second diffraction grating; and wherein the first and second diffraction gratings exhibit, for incident white light, substantially the same first order diffraction efficiency over the first and second areas.

IPC Classes  ?

• B42D 25/29 - Securities Bank notes
• B42D 25/328 - Diffraction gratingsHolograms
• B42D 25/391 - Special inks absorbing or reflecting polarised light

Abstract

A security device, comprising at least first and second embossed, reflective metal diffraction gratings in respective regions: wherein the first diffraction grating exhibits, in incident white light, a zero-order output over a first area of substantially uniform grating period, wherein the zero-order output of the first diffraction grating comprises different coloured first and second sub-outputs for respective first and second polarisations parallel and perpendicular to the first diffraction grating; wherein the second diffraction grating exhibits, in incident white light, a zero-order output over a second area of substantially uniform grating period; wherein the zero-order output of the second diffraction grating comprises third and fourth sub-outputs for respective first and second polarisations parallel and perpendicular to the second diffraction grating; wherein the third sub-output is different to the first sub-output, and/or the fourth sub-output is different to the second sub-output; and wherein the first and second diffraction gratings exhibit, for incident white light, substantially the same first order diffraction efficiency over the first and second areas.

IPC Classes  ?

• B42D 25/29 - Securities Bank notes
• B42D 25/328 - Diffraction gratingsHolograms
• B42D 25/391 - Special inks absorbing or reflecting polarised light