Optical card comprising an imaged layer

Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond

Reexamination Certificate

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C428S201000, C428S207000, C428S211100, C428S913000, C430S495100, C430S945000

Reexamination Certificate

active

06284350

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to an optical card comprising an imaged layer.
More specifically the invention is related to an optical card comprising an imaged layer containing an identification mark of the bearer.
BACKGROUND OF THE INVENTION
In recent years, with the progress of information-oriented society, a large number of optical recording media and recording-reproducing device of information have been proposed which perform recording, reproduction of optical information such as optical disc, optical card, optical tape, etc. as the means for dealing with a diversity of information. In optical recording media, there has been known one in which the information formed into binary value can be detected by conversion into change in reflectance or change in intensity of the reflected light accompagnied with the surface shape such as presence of pit (concavity). Such optical recording medium is constituted of a preformat signal and a guide groove previously provided on a substrate according to the 2P method, compression molding, cast molding, etc, an amorphous thin film of a dye or pigment such as cyanine type or polymethine type, TeO
x
, chalcogen, etc, coated of vapor deposited thereon as the optical recording layer capable of recording and reproduction with light, and further a protective substrate for protection of the above optical recording layer laminated thereon, if desired.
Among such optical recording media, an optical card has dimensions of, for example, 85,4 mm×54,0 mm×0.76 mm and is excellent in ortability. Said optical cards are intended for use in various applications such as divers type of identification operations. Therefore it is desirable that said cards contains a visual personified mark of the be arer of said card.
Said optical cards should have, when used for identification purpose, besides a number of security marks, also a visually discernible number of data and also bear a photograph of the owner.
OBJECTS OF THE INVENTION
It is an object of the present invention to provide a material having on an optical card a visual personified mark of the owner. It is a further object of the invention to provide a material having on an optical card a visual personified mark of the owner that is protected by a transparent support, preferably a subbed polyethylene terephthalate layer
It is a further object of the invention to provide a material with a long lifespan having on an optical card a visual personified mark of the owner.
SUMMARY OF THE INVENTION
According to the present invention there is provided an imaged element comprising an optical card and underneath a layer package comprising in the order given an optional image receiving layer, a prelayer, an interlayer and a transparent support, at least the optional image receiving layer or the prelayer comprising an image, characterized in that the interlayer contains a polyurethane and a cross-linking agent.
DETAILED DESCRIPTION OF THE INVENTION
An optical card according to the invention comprises an optical recording medium, a support, preferably a non-transparent support and on the opposite of the support an adhesive layer, preferably a polyethylene layer, preferably with a thickness between 20 and 40 &mgr;m. Preferably said optical card contains a covering layer on the optical recording medium opposite the support.
According to one embodiment of the invention said optical card is laminated on the side containing the adhesive layer to a layer package comprising in the order given an image receiving layer, a prelayer, an interlayer, a transparent support, preferably a subbed biaxially oriented polyethylene terephthalate, a subbed biaxially oriented polyethylene naphthalate or a polycarbonate,layer and a protective layer.
In accordance with the invention a visual personification in the form of one or more images is formed by the diffusion transfer process (DTR-process) wherein the image-wise transfer of dye(s) or silver halogenide is controlled by the development of (a) photo-exposed silver halide emulsion layer(s), and wherein dye(s)or silver halogenide is (are) transferred imagewise in a special image receiving layer.
Dye diffusion transfer reversal processes are based on the image-wise transfer of diffusible dye molecules from an image-wise exposed silver halide emulsion material into a waterpermeable image-receiving layer containing a mordant for the dye(s). The image-wise diffusion of the dye(s) is controlled by the development of one or more image-wise exposed silver halide emulsion layers, that for the production of a multicolor image are differently spectrally sensitized and contain respectively a yellow, magenta and cyan dye molecules. A survey of dye diffusion transfer imaging processes has been given by Christian C. Van de Sande in Angew. Chem. - Ed. Engl. 22 (1983) n° 3, 191-209 and a particularly useful process is described in U.S. Pat. No. 4,496,645.
For use in dye diffusion transfer photography the type of mordant chosen will depend upon the dye to be mordanted. If acid dyes are to be mordanted, the image-receiving layer being a dye-mordanting layer contains basic polymeric mordants such as polymers of amino-guanidine derivatives of vinyl methyl ketone such as described in U.S. Pat. No. 2 882 156, and basic polymeric mordants and derivatives, e.g. poly-4-vinylpyridine, the metho-p-toluene sulphonate of poly-2-vinylpyridine and similar compounds described in U.S. Pat. No. 2 484 430, and the compounds described in DE-A- 2 009 498 and 2 200 063.
Other mordants are long-chain quaternary ammonium or phosphonium compounds or ternary sulphonium compounds, e.g. those described in U.S. Pat. No. 3,271,147 and 3,271,148, and cetyltrimethyl-ammonium bromide. Preferred are polyurethane and/or cationic polyurethane mordanting polymers. Certain metal salts and their hydroxides that form sparingly soluble compounds with the acid dyes may be used too. The dye mordants are dispersed or molecularly divided in one of the usual hydrophilic binders in the image-receiving layer, e.g. in gelatin, polyvinylpyrrolidone or partly or completely hydrolysed cellulose esters.
In U.S. Pat. No. 4,186,014 cationic polymeric mordants are described that are particularly suited for fixing anionic dyes, e.g. sulphinic acid salt dyes that are image-wise released by a redox-reaction described e.g. in EP-A- 004 399 and U.S. Pat. No. 4 232 107.
Said mordanting agents are present in the dye diffusion image receiving layer preferably in an amount ranging from 0.50 g/m
2
to 6.0 g/m
2
.
Said dye diffusion image receiving layer preferably comprises a hydrophilic binder, more preferably a proteinous hydrophilic binder, most preferably gelatin in an amount ranging from 0.50 g/m
2
to 5.0 g/m
2
Preferably said dye diffusion image receiving layer contains at least one gelatin species whereof a 10% by weight aqueous solution at 36° C. and pH 6 has a viscosity higher than 35 mPa.s at a shearing rate of 1000s
−1
.
A black-and-white photograph in the form of a silver image is formed by the silver salt diffusion transfer process, called herein DTR-process. According to said process dissolved silver halide salt is transferred imagewise in a special image receiving layer, called development nuclei containing layer, for reducing therein transferred silver salt. In said process, the prelayer is optional.
The principles of the DTR-process are described in U.S. Pat. No. 2,352,014 of Andre Rott, issued Jun. 20, 1944. According to said process silver complexes are image-wise transferred by diffusion from a silver halide emulsion layer to an image-receiving layer, where they are converted, in the presence of development nuclei, into a silver image. For this purpose, an image-wise exposed silver halide emulsion layer is developed by means of a developing substance in the presence of a so-called silver halide solvent. In the exposed parts of the silver halide emulsion layer the silver halide is developed to metallic silver so that it cannot dissolve anymore and consequently cannot diffuse. In the non-exposed parts of the si

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