Abstract: A security enclosure comprises a flexible sheet of insulating material extending over the whole of the area of the enclosure and carrying lines of electrically-responsive material on each side. The lines on one side of the sheet extend obliquely relative to the lines on the other side of the sheet and are connected thereto at edge portions of the sheet to form a plurality of conductors so dividing the sheet into a number of relatively small areas so that attempted opening of the enclosure changes an electrical characteristic of the conductors. Connectors are provided at an edge portion of the sheet for individually connecting the conductors to a detector for detecting the changes in the electrical characteristic of the lines. The connectors include a switch arrangement which is selectively configured to connect further connectors associated with the detector with selected conductors.

Abstract: The improved process for producing a signature panel comprises the steps of forming on the writing surface of a panel substrate a printed graphic pattern that will change upon exposure to alcohols, organic solvents, bleaching agents and surfactants, and laminating the other surface of the panel substrate with a thermoplastic resin by extrusion or hot melt coating. According to this process, signature panels can be thermocompressed at comparatively low temperatures not only to roll mills of overprint cards using a polyvinyl chloride sheet as an oversheet base but also to card substrates such as PET sheets, metal sheets and glass sheets without causing any adverse effects on the graphic pattern printed on the writing surface of the panel which will change upon exposure to chemicals.

Abstract: The invention relates to a new lottery ticket paper for the manufacture of different kinds of lottery tickets, especially of the "instant lottery ticket" type, and a method of manufacturing said tickets. The lottery ticket paper is characterized in that it comprises a coloured, opaque base paper coated on both sides with a composition comprising at least one pigment, a filler, a binder solution, and optionally viscosity regulating agents and some kind of security element. The lottery ticket paper is protected against see-through and various kinds of forgery. It is an environmentally pleasing, nonexpensive and from the production-technical point of view suitable alternative to existing foil-laminated lottery ticket papers.

Abstract: In a laminated product wherein at least one supported information-containing hydrophilic colloid layer is adhesively bonded on at least one of its surfaces to a protective hydrophobic resin sheet, improved adherence is achieved by using as the bonding adhesive a cationic crosslinked polymer obtained by:a) condensing a polyalkylenepolyamine containing at least two primary amino groups and at least one secondary or tertiary amino group with a dicarboxylic acid to form a polyamidoamine,b) subjecting the resultant polyamidoamine to a graft reaction in the presence of an acid catalyst with an alkene-1,2-imine, andc) crosslinking the resultant graft polymer with an epihalohydrin, an Alpha-Omega dihalohydrin ether or the ether compound obtained by reaction of epichlorohydrin with a water-soluble polyalkyleneoxide to form the water-soluble cationic polymer. With this adhesive bond, a tamper-proof seal can be obtained between the information-containing colloid layer and the hydrophobic resin protective sheet.

Abstract: A document is provided having a solvent sensitive and/or pressure sensitive ink printed thereon which reacts to the application of a solvent and/or pressure to form a visible stain or image. The ink includes a first composition of solvent soluble, water insoluble dye particles, a binder, and optionally, an opacifier. Alternatively, the first composition may be combined with a second composition which includes an encapsulated solvent and optionally a stilting material. The first and second compositions may be printed on the document in separate steps or printed together as a self-contained composition. The ink may be printed on the entire surface of the document or only on selected areas thereof.

Abstract: A security card comprises a data-carrying sheet having a gelatin layer thereon and a transparent polymeric film having a gelatin layer thereon, said sheet and said film being bonded together by an adhesive composition polymerized between and in contact with the gelatin layers, the adhesive composition comprising a carboxylic acid having at least one polymerizable acrylic group.

Abstract: A substrate, such as a banknote or travellers' check, carries a security device including in association at least one embossed transitory image, such as a latent or transient image and an embossed linear area. The arrangement is such that when the embossed region of the substrate is viewed from different angles each image and linear area can be visually discerned.

Abstract: A thin film of molten polypropylene resin extruded from a T die is pressed and cooled with a chill roll equipped with a hologram relief master plate on its peripheral surface, whereupon a hologram pattern is simultaneously formed as an integral part of the polypropylene resin sheet being molded. Since the polypropylene resin has a Rockwell hardness of at least 70, the hologram pattern formed in the resulting hologram forming sheet is less likely to be damaged or lost during subsequent processing.

Abstract: An extensible transparent film is provided having a continuous phase of a low modulus or elastomeric material and an included array of entangled microfibers. The film turns opaque and increases moisture vapor transmission when stretched.

Abstract: A security paper authenticating system comprises, in combination, a security paper carrying both starch and an iodate salt, typically potassium iodate, and an authenticating composition comprising an acidic solution of an iodide salt, typically potassium iodide, the system being such that on applying the authenticating composition to authentic security paper, as by a pen, brush or stamp pad, iodine is generated and a characteristic starch-iodine coloration is produced. The authenticating composition is preferably aqueous or part-aqueous, and is preferably made acidic by means of a weak organic acid such as tartaric acid. The authenticating composition preferably also contains an antioxidant such as ascorbic acid. The invention extends to the paper and the authenticating composition individually.

Abstract: A coupon document enables a user to reveal one of two coupons in a manner which causes the other coupon to be destroyed. The document comprises first and second panels held together along their outer peripheral edges by releasable glue. Each panel has a hidden inner side on which coupon indicia is imprinted. Each panel includes a pull strip which, when pulled off, destroys the coupon indicia on the respective panel while enabling the coupon indicia on the other panel to be revealed.

Abstract: A transparent, tamperproof seal which is utilized for the protection of signed texts and documents. The tamperproof transparent seal for signed texts or documents, inclusive of checks, is constituted of at least one card having on one side thereof, an adhesive inking and varnishing multilayer lamina which is at least partially transparent, and with a suitable movable sheet-like carrier or substrate consisting of a transparent plastic material; and on the other side, possessing a delayed-action adhesive selected from a group of pressure-sensitive adhesives, and which is protected by a liner, heat-activated adhesives and wet-activated adhesives.

Abstract: The text discloses for use in printing valuable documents an allover pattern of warning indicia which is merged by human sensory perception with its background but is distinguished and reproduced by xerographic copying as a result of the employment of two different screen values for the indicia and the background which are respectively within and beyond the reproductive capability of the copier machine when used in the stated context. Adjunctively, document validating indicia are also printable on such documents in a screen value beyond the reproductive capability of xerographic copiers at the lighter settings at which the lesser screen value used for said warning indicia or background will reproduce.

Abstract: An anti-copying composite film comprising a substratum of paper or synthetic resin film, a metallic foil formed on the surface of said substratum and a colored transparent synthetic resin coating layer applied to the surface of said metallic foil, said anti-copying composite film being characterized in that the color of the coating layer is selected in Munsell color system so that the value may be 9 or less than 9 regardless of the hue, while the chroma is selected so that an index calculated in a formula on the base of the difference of the value and the difference of chroma with respect to those of black may be 20 or more than 20.

Abstract: A security paper includes at least two layers of paper each having inner and outer surfaces and predetermined mechanical properties, color and optical density. Authentication indicia is printed on the inner surface of at least one layer. The indicia is formed of a chemically, mechanically and thermally stable medium having a predetermined color, color intensity and optical density. A chemically, mechanically and thermally stable adhesive permanently adheres the inner surfaces of the layers together. The adhesive has a predetermined color and optical density. The color and optical density of the layers, the color, color intensity and optical density of the medium and the color and optical density of the adhesive combine to render the authentication indicia detectable in transmitted light and substantially imperceptible in reflected light.

Abstract: This invention relates to paper-making and in particular to non-fluorescent forgery-proof safety paper which is characterized in that it comprises, on its surface and/or in its mass, a salt of cobalt(II) or (III), at least partially soluble in aqueous phase.

Abstract: A labelstock, which after being carefully removed cannot be re-applied without leaving an unmistakable warning of tampering. If comprises a transparent facestock, a release coating forming an indicia attached to the facestock, a primer covering the facestock and release coating, a frangible metal layer covering the primer and an adhesive covering the metal layer.

Abstract: Erasable coatings for xerography paper comprise a pigment such as calcium carbonate in a binder such as an aqueous emulsion of an acrylic polymer. The erasability of the coating is improved by replacing at least 15 wt % of the binder with a polyalkane or (preferably) polyalkene wax, such as an aqueous emulsion of a polyolefin.

Abstract: The invention provides a package for packaging of products which provides evidence of tampering with or adulteration of the product by providing a readily visible indication that any such tampering or adulteration has occurred. The invention in one form provides an inner container which is in turn at least partially covered with a tamper evident packaging material. The packaging material is a tamper evident composite material comprising a photopolymerizable composition layer which is cured and it becomes extremely brittle such that any physical penetration of this packaging material will cause the brittle layer to fracture or shatter. Such shattering will provide a clear indication that penetration of the packaging material has occurred. Also there may be provided an asociated dye which will exhibit a color change when the brittle layer is fractured or shattered.

Abstract: Color change devices which are capable of undergoing a color change on bending. The devices comprise a flexible substrate having a color generating metal (e.g. a valve metal such as Ta or Nb) at at least one surface and an intimately contacting optically thin anodic film covering the color generating metal and generating a visible color by light interference and absorption effects. The thin anodic film is produced by anodizing the color generating metal in the presence of an adhesion-reducing agent (e.g. a fluoride) for weakening the normally tenacious bond between the anodic film and the metal. Devices of this kind capable of being activated by bending, as well as by separation of the constituent layers, are produced by carrying out the anodization step in the presence of a particular concentration of the adhesion reducing agent from a narrow range (e.g. 40-350 ppm of fluoride).

Abstract: Articles and methods for forming optically variable thin film flakes and replicated coatings having preselected optical properties. The articles generally comprise a flexible web of material and an optically variable thin film coating formed on one surface of the web. The optically variable coating is separated from the web to form optically variable thin film flakes. The flakes are disposed in ink and paint vehicles to provide optically variable inks, paints and the like.

Abstract: Curcumin is employed for the purpose of detecting and warning of the presence of cyanide in a food, drug, or other oral composition. The curcumin is incorporated into a food packaging material. In the presence of cyanide, the curcumin undergoes a color change causing at least a portion of the packaging material to manifest a color change. The color change is sufficient to be detected by an observer, thereby providing a warning of cyanide adulteration of the product.

Abstract: A processed paper for documents protected from being photographically and electrostatically reproduced comprises a paper substrate having a front surface, and a colored ink layer and a silvery ink layer coated over the front surface of the paper substrate, the silvery ink layer having a pattern formed thereon to cause photographic and electrostatic reproductions of information recorded on the processed paper to be illegible due to irregular reflections of light from the pattern on the silvery ink layer.

Abstract: A security document is equipped with a security element in the form of a thread or strip that is characterized by, among other things, the property of electrical conductivity. The security element is provided for this purpose with a metal coating associated with a second layer that is also electrically conductive but made of a material that maintains its electrical conductivity in spite of mechanical stress such as bending, stretching, etc. Breaks in the metal layer which might occur when the thread is being embedded in the security document or during daily use thus do not result in a complete interruption in the electrical connection, but are bridged by the second, electrically conductive layer.

Abstract: A thermally shrinkable film with a liquid detecting function is prepared by coating or printing one side of the film with an ink which turns color or dissolves upon contact with a liquid. An item or object to be packaged is packaged in a thermally shrinkable film. The thermally shrinkable film and the package are useful for detecting a liquid leaking from the packed item or object, or entering into the package from the outside. This permits a visual inspection of the quality of the item or object packaged therein or of contamination by a foreign substance.

Abstract: An interlaminar sandwich comprises first and second lacquer layers, a diffraction structure embedded between the first and second lacquer layers, a heat activated adhesive layer disposed one one of the lacquer layers, and a transparent stabilization layer disposed over the other lacquer layer, the stabilization layer distributing heat evenly through the interlaminar sandwich so that when heat is applied to the stabilization layer, the adhesive layer will bond the interlaminar sandwich to a substrate. Preferably, the interlaminar sandwich also contains an intermediary layer between the stabilization layer and the first lacquer layer which bonds these layers together. At temperatures below 170.degree. C., the adhesive layer is bonded so intimately to the substrate that the interlaminar sandwich cannot be removed from the substrate without tearing it. At temperatures above 150.degree. C., the lacquer layers soften, thus destroying the diffraction structure.

Abstract: A tamper evident over-wrap is disclosed which employs a multi-layered system including three overlapping layers of containment material and two interleaved layers of reactive material, at least one of which is a gel. Upon formation of an opening of the middle layer of containment material, the previously-isolated layers of reactive material will intermingle and react. These materials react to form a color change. By using a gel, manifestations of tampering attempts are considerably enhanced.

Abstract: A coupon document includes top and bottom paper panels releasably secured together around their peripheral edges. An exposed outer side of the top panel has first and second intersecting perforation lines. A hidden inner side of the bottom panel has first and second overlapping coupons imprinted thereon in a general L-shape such that the document can be folded and torn along either of the perforation lines to reveal one of the coupons and destroy the other coupon. The bottom panel is free of intersecting perforation lines which could weaken the revealed coupon.

Abstract: This invention is concerned with security paper for bank notes, cheques and like documents in a security strip of enhanced security which is more difficult to counterfeit than the present bank notes containing window threads.

Abstract: An article with at least a portion carrying symbols representing information to be protected against photocopying is formed by a carrier, a continuous layer covering the portion of the carrier and forming a background thereon, and a mainly discontinuous layer applied on the continuous layer and forming the symbols against the background. One of the layers is an iridescent layer of a color that copies dark and the other of the layers has a dark color. Thus photocopying gives an image without distinction between the symbols and the background.

Abstract: A weather resistant sign and a method of printing a sign including the steps of providing a sign component and an image definition, applying dry toner powder to surface portions corresponding to the image definition, and fusing the applied toner. Preferably, the fused toner is protected from weather by a transparent protective layer. A toner composition and a computer program for printing are also disclosed.

Abstract: Process for producing color change devices incorporating areas of contrasting appearance, and the devices so produced. The process involves masking limited areas of a layer of a color generating metal (e.g. Ta or Nb, especially commercially sputtered Ta foil), with a mask made of a material which permits anodization of an underlying surface and permits penetration of fluoride as an adhesion-reducing agent at levels employed in the process. The masked metal layer is anodized to form an anodic film on the metal, the anodization being carried out in an electrolyte containing fluoride at a concentration high enough to (a) weaken the adhesion of the anodic film to the underlying metal over the entire area of the film, and (b) to introduce voids in the anodic film in areas not covered by the mask to reduce the density, and thus the refractive index, of the film in these areas compared to areas covered by the mask. Finally the mask is removed.

Abstract: An article adapted to be utilized in the production of optically variable ink comprised of a flexible insoluble web, a release lever formed on the web and an optically variable multilayer thin film interference stack disposed on the release layer and which provides a color shift between two predetermined uniform colors. The interference stack includes an opaque reflective layer which has first and second surfaces and at least one period on each said first and second surfaces to provide the same color shift from each of said first and second surfaces between said two predetermined uniform colors at two different angles of incident light. Each period is comprised of a dielectric layer and a semi-opaque layer.

Abstract: Tamper-indicating tape comprising a light transmissive monolayer film having opposing first and second major surfaces. On each surface is printed colored indicia, preferably identical, such that the colored indicia on each surface obscure the colored indicia on the opposing surface when the film has not been split internally, but neither of the colored indicia obscure the other when the film has been split internally.

Abstract: A two-element lamination product for manufacture of a secure identification card that requires no insert comprises first and second resin lamination sheets, each substantially larger than the desired ID card dimensions, that are joined along one edge; the two sheets have engageable heat-and-pressure sealable surfaces and are precision cut to define two aligned, matching card panels of the desired ID card dimensions. Each card panel is joined to its sheet by plural frangible bridges. The first card panel has a transparent portion and the second an aligned, matching opaque portion with an image-receptive surface facing the first card panel; opacity may be obtained by pigmentation or by surface coating. Usually, the entire first card panel is transparent and the second card panel is all opaque.

Abstract: An initially colorless, chemically sensitive protective ink which can be readily printed or applied onto a document substrate and which reacts upon contact with an oxidizing agent to form a noticeable color change is provided. The protective ink, when printed onto a document, resists leaching by water for an extended period of time, both before and after contact with oxidizing agents, and provides visible evidence of any attempted tampering. The leach-resistant ink includes a colorless material which becomes colored upon contact with an oxidizing agent and a complexing agent which reacts to form a complex with the colorless material. A fixing agent which promotes insolubilization and fixing of the complex to the document substrate is also provided.

Abstract: A 0.3 to 2 mm thick multilayer composite material comprising the following layers:1st layer: 0.01 to 0.3 mm thick highly transparent thermoplastic2nd layer: 5 to 50 .mu.m thick decorative ink layer and/or 5 to 50 .mu.m thick adhesive layer3rd layer: 0.05 to 0.5 mm thick thermoplastic containing 0.1 to 30% by weight pigment4th layer: 0.05 to 0.8 mm thick highly elastic plastic containing up to 30% by weight pigment5th layer: 0.05 to 0.5 mm thick thermoplastic containing 0.1 to 30% by weight pigment6th layer: 5 to 50 .mu.m decorative ink layer and/or 5 to 50 .mu.m thick adhesive layer7th layer: 0.01 to 0.3 mm thick highly transparent thermoplastic is disclosedlayers 3 and 5 being optional.

Abstract: A hybrid band that includes rigid segments into a paper web being formed in a paper manufacturing process. The band includes a carrier that has an adhesive surface for mounting the rigid segments thereon and spacing filler material between contiguous rigid segments for keep them in place. A jacket is formed over the combination that comprises the carrier, segments and filler material. The resulting hybrid band is prestretched prior to its insertion in a paper web being formed in order to compensate for the subsequent shrinkage of the paper web thereby accomplishing the proper and exact positioning of the segments on said paper web.

Abstract: An embossing foil such as a hot embossing foil is of a laminate structure comprising in succession a backing foil, a separating layer, a transparent cover lacquer, a decorative layer means and a foundation layer of an at least translucent material. The decorative layer means successively comprises a first decorative layer adjacent to the cover lacquer layer, an opaque intermediate layer and a second decorative layer adjacent to the foundation layer. The opaque intermediate layer can be covered at least on one side with a single-colored layer over a large area thereof.

Abstract: Curcumin is employed for the purpose of detecting and warning of the presence of cyanide in a food, drug, or other oral composition. The curcumin is incorporated into a food packaging material. In the presence of cyanide, the curcumin undergoes a color change causing at least a portion of the packaging material to manifest a color change. The color change is sufficient to be detected by an observer, thereby providing a warning of cyanide adulteration of the product.

Abstract: Disclosed is a process for forming secure images which comprises electrostatically charging an imaging member; imagewise exposing the charged member, thereby forming a latent image on the member; developing the latent image with a liquid developer comprising a liquid medium, a charge control additive, and toner particles comprising a colorant and a polymeric material; allowing the developed image to dry on the imaging member; contacting the portion of the imaging member with the dry developed image with a substantially transparent sheet having an adhesive material on the surface thereof in contact with the imaging member, thereby transferring the developed image from the imaging member to the substantially transparent sheet; contacting the adhesive surface of the substantially transparent sheet with the developed image with a paper sheet having a polymeric coating on the surface that is in contact with the substantially transparent sheet; and applying heat and pressure to the substantially transparent sheet a

Abstract: A label assembly comprising a releasable portion which may be used as an in-store coupon constructed of a base stock having a first and second film layer having a controlled interfacial bond therebetween which will retain the film layers in integral relationship during handling or the like, but will also allow the easy separation between the film layers when desired. The controlled interfacial bond may be termed as "controlled adhesion" which is obtained by co-extruding two dissimilar polymer layers having a controlled affinity therebetween. A pressure sensitive adhesive layer is laminated to the second film layer and is provided with a release liner for the easy handling thereof. A face stock comprising a top sheet forming an in-store coupon, for example, is then adhered to the first film layer of the base stock structure to complete the label assembly.

Abstract: The method involves forming a laminate capable of generating a substantially non-dichroic color by a light interference and absorption phenomenon by depositing a layer of a metal of medium light reflectivity by a vapor deposition technique on a suitable substrate, anodizing a surface of the metal in the presence of fluorine ions to form a detachable film of an oxide of the metal on the surface having a thickness suitable for color generation, and adhering a flexible strip of transparent or translucent material over the oxide film in such a manner that the strength of attachment of the flexible strip to the oxide film exceeds the adhesive strength between the oxide film and said surface of said metal.

Abstract: An identity card in which a first image recording layer comprising a colorant capable of absorbing light of a visible wavelength region provided on a first support and a second image recording layer comprising a colorant capable of absorbing light of an infrared wavelength region provided on a second support are adhered to each other in face-to-face contact to form a laminated structure highly resistant to alteration and/or forgery.

Abstract: A high-security identification card is produced in a system in which a photograph from a video camera is converted to digital data and reproduced with high-fidelity on a video display screen. Other images, such as signatures and fingerprints, can be treated in a similar manner using either a video camera or a CCD (charge-coupled device). After processing, the video information is displayed on the screen where it is combined with variable data typed in from a keyboard. The digital data from the terminal is fed into a laser printer that prints the portrait and any desired alphanumeric information on a paper sheet. The paper is then laminated, under heat and pressure, between two sheets of transparent thermoplastic material, at a temperature and pressure sufficient to cause the plastic material to penetrate the interstices between the fibers of the paper card and form a unitary structure that cannot be delaminated without destruction of the identifying data.

Abstract: A laminate is produced by bonding together two hydrophobic thermoplastic resin sheets at least one of which carries at least one hydrophilic colloid layer containing a photograph and/or other information on its inner side, by the steps comprising:(1) treating such information-bearing hydrophilic colloid layer with an aqueous composition containing a self-cross-linkable reaction product of:(i) an epihalohydrin or an Alpha-dihalohydrin,(ii) a water-soluble polyamide, and(iii) a water-soluble polyamine containing at least two nitrogen atoms separated by at least three carbon atoms and optionally also by at least one oxygen or sulphur atom and having at least two hydrogen atoms attached to different nitrogen atoms,(2) drying thus treated layer, and(3) applying heat and pressure to bond the hydrophobic resin sheets together with such hydrophilic colloid layer sandwiched there-between.

Abstract: A bag having a front panel and a rear panel having respective side and bottom portions sealed together leaving an opening in the bag for access to the interior thereof. The rear panel extends beyond the opening to form a flap that can be folded over the opening. A first area of adhesive means is carried by the rear panel, i.e., the flap, and is adapted to secure the panels together to close the opening of the bag by bonding to a second area of adhesive means carried by the front panel. Each adhesive means comprises a backing bearing a layer of adhesive on one major surface thereof, and each is bonded to its respective panel by means of the second major surface of said backing, which second major surface is bonded to the material of its respective panel by means of heating, fusing, or the like.

Abstract: A tamper-proof seal employed with a container comprising a plurality of frangible cells filled with a harmless colored substance. The cells may either be located between two hermetically sealed plastic sheets or formed on the exterior of the seal and upon puncturing or applying pressure necessary for entry into the container the cells rupture releasing the substance to provide a visual indication that tampering with the container may have occurred.

Abstract: A tamper indicating tape for use with a closure or container. The tape comprises a film including phase separated polymers. Colored indicia are applied to opposing major surfaces of the film indicative of a condition that someone has tampered with the tape, e.g., tape removal and reattachment, or abrading. The film further bears a layer of adhesive thereon as a means for adhering the tape to a portion of a container or to a closure tape on a can lid. When the film of the tamper indicating tape is sufficiently split, one set of colored indicia is obscured and the other set of colored indicia is rendered perceptible. When the film is abraded to remove the perceptible set of colored indicia, the aforementioned obscured set of colored indicia is rendered perceptible.

Abstract: The method for creating a hologram film laminated product comprises the steps of: applying a thermoplastic adhesive material to one side of a hologram film; feeding a substrate to a heat activated dry film thermo laminator and simultaneously feeding the hologram film with the thermoplastic adhesive coated side thereof facing the substrate into the laminator with the substrate; and heat activated dry film thermo laminating the hologram film material to the substrate. The method for applying an adhesive to a hologram film includes the steps of: passing the hologram film between electrical corona treatment rollers; then passing the hologram film past a priming or sizing station; and next passing the hologram film past an adhesive applicator for applying melted adhesive to the hologram film. The hologram laminated product formed by the methods includes a substrate layer, an intermediate adhesive layer, and a hologram film layer.