Methods of manufacturing security documents and security devices, and corresponding products, provide a lenticular device effect in a first registration zone. Viewing its appearance from two different angles in this way, the relative positioning of the focussing element array and the image array can be judged to a high degree of accuracy. If the two arrays do not have the desired relative position, this will be clearly apparent since the different first and second images will not be captured at the first and second test viewing angles.

Methods of manufacturing security documents and security devices, and corresponding products, provide a lenticular device effect in a first registration zone. Viewing its appearance from two different angles in this way, the relative positioning of the focussing element array and the image array can be judged to a high degree of accuracy. If the two arrays do not have the desired relative position, this will be clearly apparent since the different first and second images will not be captured at the first and second test viewing angles.

Provided are an automatic continuous image engraving device capable of decreasing in size of an installing space of the device. The device comprises an unengraved medium accommodating part, an engraved medium accommodating part, a medium dispenser, a medium positioning and conveying part, and an image engraving part, wherein the medium dispenser releases the unengraved card-shaped engraving medium to cause the same to be succeeded at the succeeding position, the medium positioning and conveying part returns the engraved card-shaped engraving medium after image engraving from the engraving position to the succeeding position, and the medium dispenser adsorbs the engraved card-shaped engraving medium at the succeeding position, moves the same upward, travels above the engraved medium accommodating part, and releases the engraved card-shaped engraving medium to be accommodated.

Provided are an automatic continuous image engraving device capable of decreasing in size of an installing space of the device. The device comprises an unengraved medium accommodating part, an engraved medium accommodating part, a medium dispenser, a medium positioning and conveying part, and an image engraving part, wherein the medium dispenser releases the unengraved card-shaped engraving medium to cause the same to be succeeded at the succeeding position, the medium positioning and conveying part returns the engraved card-shaped engraving medium after image engraving from the engraving position to the succeeding position, and the medium dispenser adsorbs the engraved card-shaped engraving medium at the succeeding position, moves the same upward, travels above the engraved medium accommodating part, and releases the engraved card-shaped engraving medium to be accommodated.

A method of making a security device including: (a) forming an array of focussing elements on at least a first region of a focussing element support layer, by: (a)(i) applying a first transparent curable material either to the focussing element support layer or to a casting tool carrying a surface relief corresponding to the focussing elements, over an first sub-region of the first region and applying a second transparent curable material to a second sub-region of the first region laterally offset from the first sub-region, the first and second transparent curable materials having different optical detection characteristics from one another; (a)(ii) forming the first and second transparent curable materials with the casting tool; and (a)(iii) curing the first and second transparent curable materials in the first region, so as to retain the surface relief.

A method of making a security device including: (a) forming an array of focussing elements on at least a first region of a focussing element support layer, by: (a)(i) applying a first transparent curable material either to the focussing element support layer or to a casting tool carrying a surface relief corresponding to the focussing elements, over an first sub-region of the first region and applying a second transparent curable material to a second sub-region of the first region laterally offset from the first sub-region, the first and second transparent curable materials having different optical detection characteristics from one another; (a)(ii) forming the first and second transparent curable materials with the casting tool; and (a)(iii) curing the first and second transparent curable materials in the first region, so as to retain the surface relief.

The invention provides a free flowing copolymer between disparate plastic layers to thermally balance between the two differently expanding/contracting materials. The primer layer or thermal balance layer fully encapsulates the PET layer and can absorb the difference between the internal PET layer with any layer bonded to the encapsulated PET without cracking, bending or pitting and can reset into position when the heating/cooling has ended to make planar plastic core sheets for products such as credit cards, gift cards and the like.

The invention provides a free flowing copolymer between disparate plastic layers to thermally balance between the two differently expanding/contracting materials. The primer layer or thermal balance layer fully encapsulates the PET layer and can absorb the difference between the internal PET layer with any layer bonded to the encapsulated PET without cracking, bending or pitting and can reset into position when the heating/cooling has ended to make planar plastic core sheets for products such as credit cards, gift cards and the like.

A visual security feature is provided that is disposed on a target. The visual security feature includes two substantially transparent layers. At least one of the two substantially transparent layers is present in an image-wise pattern.

A visual security feature is provided that is disposed on a target. The visual security feature includes two substantially transparent layers. At least one of the two substantially transparent layers is present in an image-wise pattern.