Source: http://www.google.com/patents/US7793846?ie=ISO-8859-1&dq=5,266,072
Timestamp: 2014-03-12 20:35:58
Document Index: 318131147

Matched Legal Cases: ['Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 2', 'Application No. 2', 'art 1', 'Application No. 10', 'Application No. 02805980']

Patent US7793846 - Systems, compositions, and methods for full color laser engraving of ID ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsIn one embodiment, the invention provides a method for forming a full color laser engraved image on an ID card. As described below, a special image capable layer is prepared that is addressable by one or more near infrared (NIR) lasers. Each type of particle contained within the image capable layer is...http://www.google.com/patents/US7793846?utm_source=gb-gplus-sharePatent US7793846 - Systems, compositions, and methods for full color laser engraving of ID documentsAdvanced Patent SearchPublication numberUS7793846 B2Publication typeGrantApplication numberUS 10/330,034Publication dateSep 14, 2010Filing dateDec 24, 2002Priority dateDec 24, 2001Also published asCA2470600A1, CA2470600C, EP1459246A1, EP1459246A4, EP1459246B1, US20030234292, WO2003056507A1, WO2003056507B1Publication number10330034, 330034, US 7793846 B2, US 7793846B2, US-B2-7793846, US7793846 B2, US7793846B2InventorsRobert JonesOriginal AssigneeL-1 Secure Credentialing, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (126), Non-Patent Citations (125), Referenced by (1), Classifications (28), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetSystems, compositions, and methods for full color laser engraving of ID documentsUS 7793846 B2Abstract In one embodiment, the invention provides a method for forming a full color laser engraved image on an ID card. As described below, a special image capable layer is prepared that is addressable by one or more near infrared (NIR) lasers. Each type of particle contained within the image capable layer is associated with a particular color (e.g., cyan, magenta, or yellow) and is responsive (i.e., can selectively absorb) a particular wavelength of laser energy to form a laser engraved pixel in that respective color. In one embodiment, the particles are selected such that the wavelengths that they respond to do not overlap significantly. By providing discrete physical particles and preventing a given particle from responding to more than one laser wavelength, it can be possible to minimize so-called �cross talk� between the cyan, magenta, and yellow centers and minimize contamination and/or chemical mixing of image formers. This helps to ensure image accuracy and quality.
Sensitizing Materials For Laser Engraving (Application No. 60/344,677, �Inventor: Brian LaBrec); Full Color Laser Engraved System For Identification Card Imaging (Application No. 60/344,674, �Inventor: Robert Jones); Reducing Cracking In Identification Documents (Application No. 60/344,710, �Inventors: Robert Jones and Lori Shah); An Inkjet Receiver On Teslin Sheet (Application No. 60/344,685, �Inventors: Daoshen Bi. and Drank Dai); Laser Engraving Coating System (Application No. 60/344,675, �Inventor: Brain LaBrec); Forming Variable Information In Identification Documents By Laser Ablation (Application No. 60/344,676, �Inventor: Brian LaBrec); Laser Etched Security Feature (Application No. 60/344,716, �Inventors: George Theodossiou and Robert Jones); Manufacture Of Contact Smart Cards (Application No. 60/344,717, �Inventors: Thomas Regan and Robert Jones); Manufacture Of Contact-Less Smart Cards (Application No. 60/344,719, �Inventors: Daoshen Bi, Robert Jones and John Lincoln); Manufacture Of An All-Pet Identification Document (Application No. 60/344,673, �Inventors: Thomas Regan and Robert Jones); Tamper Evident Coating To Combat Heat Intrusion (Application No. 60/344,709, �Inventor: Brian LaBrec); Pressure Sensitive UV Curable Adhesive Composition (Application No. 60/344,753, �Inventor: William Rice); Heat Activated UV Curable Adhesive Composition (Application No. 60/344,688, �Inventor: William Rice); Security Ink With Cohesive Failure (Application No. 60/344,698, �Inventor Bentley Bloomberg); Variable Based Identification Documents With Security Features (Application No. 60/344,686, �Inventors: Robert Jones and Daoshen Bi); Multiple Image Feature For Identification Document (Application No. 60/344,718, �Inventor: Brian LaBrec); Biometric Identification System (Application No. 60/344,682, �Inventor: Thomas Lopolito); Identification Document Using Polasecure In Differing Colors (Application No. 60/344,687, �Inventors: Bentley Bloomberg and Robert Jones); and Secure Id Card With Multiple Images and Method of Making (Application No. 60/344,683, �Inventor: Brian LaBrec). The present invention is also related to the following provisional applications:
Identification Document and Related Methods (Application No. 60/421,254, �Inventors: Geoff Rhoads, et al); Identification Document and Related Methods (Application No. 60/418,762, �Inventors: Geoff Rhoads, et al); Image Processing Techniques for Printing Identification Cards and Documents (Application No. 60/371,335�Inventors: Nelson T. Schneck and Charles R. Duggan); Shadow Reduction System and Related Techniques for Digital Image Capture (Application No. 60/410,544�Inventors: Scott D. Haigh and Tuan A. Hoang); Systems and Methods for Recognition of Individuals Using Combination of Biometric Techniques (Application No. 60/418,129, �Inventors James Howard and Francis Frazier, filed Oct. 11, 2002); Methods of Providing Optical Variable Device for Identification Documents (Application No. 60/429,115, �Inventors Jones et al.) Systems and Methods for Managing and Detecting Fraud in Image Databases Used with Identification Documents (Application No. 60/429,501, �Inventors James Howard and Francis Frazier, filed Nov. 26, 2002); Identification Card Printed with Jet Inks and Systems and Methods of Making Same (application Ser. No. 10/289962, �Inventors Robert Jones, Daoshen Bi, and Dennis Mailloux, filed Nov. 6, 2002); The present invention is also related to U.S. patent application Ser. Nos. 09/747,735 (published as US 2003-0038174 A1), filed Dec. 22, 2000, and 09/602,313 (now U.S. Pat. No. 6,752,432), filed Jun. 23, 2000, 10/094,593 (published as US 2002-0170966 A1), filed Mar. 6, 2002, U.S. Provisional Patent Application No. 60/358,321, filed Feb. 19, 2002, as well as U.S. Pat. No. 6,066,594.
Full Color Laser Engraved System For Identification Card Imaging (Application No. 60/344,674, �Inventor: Robert Jones); FIELD The invention relates in general to an information-bearing laminar assembly suitable for use as an identification card, and more particularly, to forming information on information-bearing laminar assembly by laser engraving.
The above-described printing techniques are not the only methods for printing information on data carriers such as ID documents. Laser beams, for example can be used for marking, writing, bar coding, and engraving many different types of materials, including plastics. Lasers have been used, for example, to mark plastic materials to create indicia such as bar codes, date codes, part nunbers, batch codes, and company logos. It will be appreciated that laser engraving or marking generally involves a process of inscribing or engraving a document surface with identification marks, characters, text, tactile marks�including text, patterns, designs (such as decorative or security features), photographs, etc.
One way to laser mark thermoplastic materials involves irradiating a material, such as a thermoplastic, with a laser beam at a given radiation. The area irradiated by the laser absorbs the laser energy and produces heat which causes a visible discoloration in the thermoplastic. The visible discoloration serves as a �mark� or indicator; it will be appreciated that laser beams can be controlled to form patterns of �marks� that can form images, lines, numbers, letters, patterns, and the like. Depending on the type of laser and the type of material used, various types of marks (e.g., dark marks on light backgrounds, light marks on dark backgrounds, colored marks) can be produced. Some types of thermoplastics, such as polyvinylchloride (PVC), acrylonitrile butadiene styrene (ABS), and polyethylene terephthalate (PET), are capable of absorbing laser energy in their native states. Some materials which are transparent to laser energy in their native state, such as polyethylene, may require the addition of one or more additives to be responsive to laser energy.
SUMMARY Using laser beams to write or engrave information to ID cards presents a number of advantages over conventional printing. For example, the foaming of the thermoplastic that can occur with some types of laser engraving can be adapted to provide an indicium having a tactile feel, which is a useful authenticator of a data carrier that also can be very difficult to counterfeit or alter. In addition, laser engraving generally does not require the use of ink, which can reduce the cost of consumables used to manufacture an ID card. Laser engraving can also be more durable than ink printing, and more resistant to abrasion (which can be particularly useful if a counterfeiter attempts to �rub off� an indicium on an ID card). The resolution and print quality of laser engraving often can be higher than that of conventional ink-based printing. Laser engraving also can be a more environmentally friendly manufacturing process than printing with ink, especially because solvents and other chemicals often used with ink generally are not used with laser engraving.
In one embodiment, the invention provides a method for forming a full color laser engraved image on an ID card. As described below, a special image capable layer is prepared that is addressable by one or more near infrared (NIR) lasers. Each type of particle contained within the image capable layer is associated with a particular color (e.g., cyan, magenta, or yellow) and is responsive (i.e., can selectively absorb) a particular wavelength of laser energy to form a laser engraved pixel in that respective color. In one embodiment, the particles are selected such that the wavelengths that they respond to do not overlap significantly. By providing discrete physical particles and preventing a given particle from responding to more than one laser wavelength, it can be possible to minimize so-called �cross talk� between the cyan, magenta, and yellow centers and minimize contamination and/or chemical mixing of image formers. This helps to ensure image accuracy and quality.
FIG. 3 is an illustrative flow chart of a method for color laser engraving (including full color laser engraving), in accordance with one embodiment of the invention. We first select a leuco dye and IR dye pair (step 100). Our preferred embodiment employs three leuco dyes representing cyan (C), yellow (Y) and magenta (M) colors, and three infrared (IR) absorbing dyes, one for each leuco dye. In one embodiment, we use leuco dyes such as those commonly known to the �Polaroid Sunspot� and have been shown to produce photographic quality images at high resolution (e.g., >500 dpi). The leuco dyes change to a specific color (e.g., Y, M, or C) when activated with appropriate laser energy. Of course, those skilled in the art will appreciate that other types of dyes can be used in alternate embodiments, as well.
Referring again to FIG. 3, for each pair of leuco dye and IR dye selected in step 100, a brittle, grindable compound, such as a matrix, is created (step 105). In one embodiment, this is accomplished by constructing an acrylate matrix for each leuco dye and IR dye pair. We cast each acrylate matrix (through methods well known to those skilled in the art) onto a so-called �release� web at a fixed thickness (e.g., about 10-20 microns). The acrylate matrix is then fully cured (e.g., through an appropriate curing method for the matrix, such as ultraviolet (UV) based curing), to create the brittle grindable matrix. In one embodiment, the acrylate monomers, initiators, etc. are chosen to yield a brittle matrix and a very high cure rate (e.g., substantially 100% cured).
Each fully cured acrylate/leuco dye/IR dye matrix is then removed from the reusable �release� carrier and ground (step 110) to a desired particle size. In one embodiment, the desired average particle size is roughly 10 microns thick (about 10-20u square�max). The grinding can occur in many different ways, as will be appreciated by those skilled in the art. In one embodiment, we use cryogenics to grind the fully cured acrylate/leuco dye/IR dye matrix. The resultant particles can have any shape, although the grinding tends to produce irregularly shaped particles. In this fashion, we prepare three separate acrylate matrices each with its own leuco dye/IR dye pair.
We then blend the three matrices (step 115) to obtain a mix that is added to a carrier to form an image capable layer (120)�that is, a layer that is capable of having an image formed (i.e., laser marked or laser engraved) thereon by the application of appropriate laser energy. In one embodiment, the mix is cast into a thickness of roughly 1-5 mils (e.g., 25-125u). This thickness of mix can result in an image capable layer that is capable of generating a full color image, with appropriate color balance, when laser energy is applied (step 125).
FIG. 4 is a cross sectional view of an imaging layer 200 manufactured, in accordance with one embodiment of the invention. The imaging layer includes a plurality of particles 202, 204, 206, each particle comprising a pair, respectively, of yellow, cyan, and magenta with an appropriate leuco dye. Note that although FIG. 4 illustrates all of the particles 202, 204, 206 as having substantially uniform size, that is provided merely for illustration and is not required for the invention. In fact, in many embodiments of the invention, the particle size will be random. In addition, FIG. 4 illustrates each particle as having equal, symmetrical portions of leuco dye (shown as �L�) and colored IR dye (shown, e.g., as �Y�, �M�, and �C�), but these are provided entirely for the purpose of illustration, and are not intended to show literally what the particles look like.
The image capable layer (step 125) has a preset distribution (because of the mixing and blending of steps 100-120) of CYM particles (all preferably transparent), each capable of absorbing specific NIR radiation to achieve the necessary color formation. We also have separation of the CYM imaging centers in that they are each encased in a highly cross-linked acrylate matrix within another �carrier� resin system. Thus, �cross talk� between the CYM centers is minimized, as is contamination and/or chemical mixing of image formers.
In one embodiment, the �carrier resin� system is can be solvent cast (e.g., no dissolution of the acrylate matrices), UV�100% solids, or extrudable resin systems. All three can be used to incorporate the imaging layer into a document structure.
CONCLUDING REMARKS Having described and illustrated the principles of the technology with reference to specific implementations, it will be recognized that the technology can be implemented in many other, different, forms.
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