Security papers
AssigneePortals Limited
InventorAlan J. Tooth
Life of this patent
Estimating the term…
Abstract
A security paper which contains a security device e.g. a strip, thread or planchette having at least two machine verifiable security features thereon, one of which is a magnetic material, which may be magnetically coded or printed in a predetermined pattern on the device, and a second of which is a luminescent material, an X-ray absorbent or a metal. The provision of several features on one device provides a large increase in document security.
Claims13
A security paper which contains a security device lying substantially within the body of the paper and having at least two distinct machine verifiable security features, a first of the security features being a magnetic material and the second feature being a second and different material selected from the group consisting of:
- a. a luminescent material,
- b. an x-ray absorbent, and
- c. a non-magnetic metal.
A security paper as claimed in claim 44, wherein the non-metallic substrate has a layer of metal thereon, formed by a technique selected from the group consisting of vacuum deposition, laminating a metal foil to the plastics substrate film, and adhering a layer of metal powder to the plastics substrate film.
A security paper which contains a security device which is a strip of plastics film bearing as a first independently machine verifiable security feature a coating of a non-magnetic metal and as a second independently machine verifiable security feature a coating of a particulate magnetic material.
A process for making a security paper, which process comprises incorporating within the paper a security device which has at least two distinct machine verifiable security features, a first of the security features being a magnetic material and a second feature being selected from the group consisting of:
- (a) a luminescent material,
- (b) an X-ray absorbent, and
- (c) a non-magnetic metal.
A method of verifying a security paper which paper contains a security device having at least two distinct security features which method comprises detecting by a machine a magnetic property of a magnetic material which is a first of the said security features and also detecting by a machine a second of the said security features by a property selected from the group consisting of:
- (a) the luminescence of the security device,
- (b) the absorption of X-rays by the security device, and
- (c) the presence of non-magnetic metal in the security device.
Dependencies are inferred from the claim text.