摘要:
The invention relates to the manufacture of multilayered metal articles, which are made from different materials and counterfeit protected, for example, composite base or collector's coins, metal tokens, medals, in particular, to the manufacture of composite coins, tokens or medals consisting of several parts, generally of a disc and a ring made from different materials. The invention provides a multilayered metal composite article comprising a circular central part and a ring-shaped part around it, wherein the central and ring-shaped parts are made from different metals, the ring-shaped part being made of at least one valve metal selected from the group consisting of aluminium, titanium, tantalum, niobium, with an upper surface layer subjected to electrochemical processing.
摘要:
The invention relates to compositions of inorganic phosphors suitable for protecting valuable material objects against counterfeit. A composition for marking metal products produced by powder metallurgy technique includes a phosphor and a binding/lubricating agent as which fatty acid derivatives or synthetic wax powders and/or paraffin powders are used. A method for marking metal products consists in mixing a metal alloy powder with a marking composition, followed by compacting the resultant mixture and sintering. The invention provides for the achievement of an even distribution of a marking component in the metal powder, and also effective marking of the products in the process of manufacture thereof by powder metallurgy technique, and a simplification and safety of the marking technique.
摘要:
The claimed group of inventions discloses a layered product on a paper or polymer substrate with an optically variable structure, and also a method for manufacturing same. The layered product comprises a coating in the form of a printed screen, and a three-dimensional screen. The three-dimensional screen is made in the form of elements with a symmetrical and/or asymmetrical profile to form a relief on both sides of the substrate, and is so arranged in respect to the printed screen that the three-dimensional screen is at least partially located above the printed screen. The width of lines, the distance between lines of the printed and three-dimensional screens and the mutual orientation of the screens are selected such that they form a moire image which is hidden, when the data carrier is viewed at a right angle, and becomes visible when the data carrier is viewed at an acute angle. The present invention provides an increase in the security of products, and also an increase in the technological effectiveness and a reduction in the cost of the security element owing to the reduction of passes in a printing machine.
摘要:
The invention relates to counterfeit-protected data carriers and methods for protecting printed products against counterfeit. Data carrier has a transparent portion with graphic elements disposed on both sides thereof in the form of a high resolution line screen, said graphic elements forming a periodic structure, wherein the elements are mutually arranged such that they form an image which is hidden when viewed in reflected light and visible when viewed in transmitted light; furthermore, when viewed from a different direction in transmitted light the image changes from positive to negative and vice versa, and/or the color of the image changes completely or partially, and/or the effect of motion of monochrome or multi-colored moire fringes appears. Method for manufacturing the data carrier comprises applying graphic elements to both sides of a transparent portion of the carrier by printing. The data carrier retains its flatness after printing. The invention enhances the security of products, provides a novel optically variable effect and/or a motion effect, as well as improves the production effectiveness and reduces the cost of the security element.