Coating processes – Nonuniform coating – Applying superposed diverse coatings or coating a coated base
Reexamination Certificate
2003-05-19
2009-02-17
Hess, Bruce H (Department: 1794)
Coating processes
Nonuniform coating
Applying superposed diverse coatings or coating a coated base
C358S003130, C358S003160, C358S504000, C358S518000, C358S523000, C428S204000, C428S207000, C428S208000
Reexamination Certificate
active
07491424
ABSTRACT:
The present invention discloses methods and systems for printing by superposing a metallic ink and transparent inks. These methods and systems are useful for color separating images into superpositions of a metallic ink and transparent inks both for design purposes and for the creation and authentication of security documents, such as banknotes, checks, diploma, corporate documents, passports, identity cards, credit cards, product labels, optical disks, CDs, DVDs, packages of medical drugs, cosmetics, and alcoholic drink bottles. By combining a metallic ink and transparent inks, one may create printed images behaving dynamically: an image viewed under specular reflection may be considerably different from the same image viewed under non-specular reflection. Patterns which are either dark or hidden become highlighted under specular reflection, yielding interesting visual effects. Metallic inks allow therefore to create visually appealing dynamically changing color images. In addition, the inversion effect provided by metallic inks allows to enhance microstructures present in the image or to reveal hidden patterns. Since these effects are lost in photocopied documents, the disclosed methods, systems and security documents offer a high security against counterfeiting attempts.
REFERENCES:
patent: 4420515 (1983-12-01), Amon
patent: 5032003 (1991-07-01), Antes
patent: 5370976 (1994-12-01), Williamson et al.
patent: 6198545 (2001-03-01), Ostromoukhov
patent: 6208735 (2001-03-01), Cox
U.S. Appl. No. 09/923,762, filed Jun. 27, 2002, N. Lofgren.
F. R. Clapper and J. A. C. Yule,The Effect of Multiple Internal Reflections on the Densities of Half-tone Prints on Paper, Journal of the Optical Society of America, vol. 43, No. 7, Jul. 1953, pp. 600-603.
S. Inoue, N. Tsumara, Y. Miyake, Measuring MTF of Paper by Sinusoidal Test Pattern Projection, Journal of Imaging Science and Technology, vol. 41, No. 6, Nov./Dec. 1997, 657-661.
D.B. Judd, Fresnel reflection of diffusely incident light, Journal of Research of the National Bureau of Standards, vol. 29, Nov. 1942, 329-332.
H.R. Kang, Applications of color mixing models to electronic printing, Journal of Electronic Imaging, vol. 3, No. 3, Jul. 1994, 276-287.
H.R. Kang, “Color Technology for Electronic Imaging Devices”, SPIE Optical Engineering Press, 1997, pp. 8-12.
H.R. Kang, “Color Technology for Electronic Imaging Devices”, SPIE Optical Engineering Press, 1997, pp. 43-45, original reference is : J.A.C. Yule, W.J. Nielsen, The penetration of light into paper and its effect on halftone reproductions, Proc. TAGA, vol. 3, 1951, 65-76.
Kern G.M., Micale J., Lavelle S., Valenzuela P., “Hiding power of aluminium pigments in printed ink films”, American Ink Maker, vol. 69, No. 10, Oct. 1991, 60-68.
H. Kipphan, Handbook of Print Media, Springer-Verlag, 2001, pp. 103-105.
H. Kipphan, Handbook of Print Media, Springer-Verlag, 2001, p. 92.
H. Kipphan, Handbook of Print Media, Springer-Verlag, 2001, p. 87, p. 501.
P. Kubelka, “New contributions to the optics of intensely light-scattering material, part II: Non-homogeneous layers”, Journal of the Optical Society of America, vol. 44, 1954, 330-335.
H.E.J. Neugebauer, Die theoretischen Grundlagen des Mehrfarbendrucks, Zeitschrift fuer wissenschaftliche Photographie, vol. 36, 1937, 36-73, reprinted in Neugebauer Seminar on Color Reproduction, SPIE vol. 1184, 1989, 194-202.
V. Ostromoukhov, R.D.Hersch, “Artistic Screening”, Siggraph95, Computer Graphics Proceedings, Annual Conference Series, 1995, pp. 219-228.
W.H. Press, B.P. Flannery, S.A. Teukolsky, W.T. Fetterling, Numerical Recipes, Cambridge University Press, 1st edition, 1988, section 10.5, pp. 309-317.
G. Rogers, “A Generalized Clapper-Yule Model of Halftone Reflectance”, Journal of Color Research and Application, vol. 25, No. 6, Dec. 2000, 402-407.
J.L. Saunderson, “Calculation of the color pigmented plastics, Journal of the Optical Society of America”, vol. 32, 1942, 727-736.
A. Stanton, G. Raencic, Ink Trapping and Colorimetric Variation, Proc. TAGA 2001, 258-281.
E.J. Stollnitz, V. Ostromoukhov, D.Salesin, “Reproducing Color Images Using Custom Inks”, Proc. of SIGGRAPH 98, in Computer Graphics Proceedings, Annual Conference Series, 1998, 267-274.
D.R. Wyble, R.S. Berns, A Critical Review of Spectral Models Applied to Binary Color Printing, Journal of Color Research and Application, vol. 25, No. 1, Feb. 2000, 4-19.
Collaud Fabien
Emmel Patrick
Hersch Roger David
Ecole Polytechnique Federale De Lausanne (EPFL)
Hess Bruce H
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