Atlantek, Inc.

Zebra Atlantek, Inc.

Harry D Schofield

Paul R Caron

Edward A Nardone

Paul S Follett

Chris S Rothwell

Gary Field

The present invention provides counterfeit resistant ID cards where a microprinting security feature is applied to the card at the time and place of card issuance. The present invention further provides for an ID card that includes microprinted security information including a code by which the authenticity of the ID card can be cross verified. In accordance with the present invention a microprint text in a grayscale gradient is placed onto an ID card using a high accuracy multi-pass thermal printing technology. In using the process of the present invention, a three pass thermal printer is used that is configured to such a high tolerance, that the grayscale gradient microprinting is possible without producing significant artifacts. When this technique is applied, any imperfections that result from the use of lower quality printing equipment become immediately identifiable reducing the ability of counterfeiters to produce fake or altered ID cards.

Grayscale security microprinting for identification cards

The present invention provides a counterfeit resistant ID card where a printed security feature is applied to the ID card at the issuance location at the time the card is issued. Specifically, the present invention provides for a process of producing an ID card having a unique imbedded security code that is generated and specifically matched to the particular ID card being printed and is applied at the time and place that the card is issued thereby providing a code by which the authenticity of the ID card can be cross verified. Verification is completed by comparing the code on the ID card to the date stamped log of all ID cards printed by the printer at the issuance location. Each entry in the log is encoded with a unique code number that corresponds to the specific print job and more importantly to the specific ID card printed. The present invention provides for the recording of this print log code into a central database to be maintained with the records corresponding to the particular ID card that was printed.

Printer driver log security verification for identification cards

A wide-format thermal plotting apparatus includes a single platen roller and a plurality of thermal print heads arranged in first and second diametrically opposed rows on the platen roller, the second row having at least one more print head than the first row. More specifically, the rows are arranged in upper and lower opposed relation so that the first, or lower row supports the force applied by the upper row plus the weight of the platen roller, thereby preventing bowing thereof. A supply of print media is sequentially threaded through the first and second rows of print heads, wrapping around the platen roller so that the second or upper row is the downstream printing row. The print heads are arranged in alternating relation between the rows such that print lines of print heads in alternate rows abut or overlap each other with respect to the width of print media. Each print head is mounted for pressured engagement with the platen roller, the print heads in the second row being adjusted to have a greater engagement pressure than the print heads in the first row. The platen roller is driven so that the print media is sequentially drawn through the first and second rows of print heads. The higher number of print heads in the second, downstream row and the increased engagement pressure thereof ensures that the print media remains in contact with the platen roller during printing.

Multi-head wide-format thermal plotter

A three-pass thermal color printer for printing a color image on a continuous web of thermal print media consists of a thermal printhead having an upstream side adjacent the roll of print media and an opposite downstream side. The printer further consists of an associated printhead platen, and a set of drive rollers positioned between the printhead and the roll of print media. The drive rollers are operative for drawing the print media through the printhead in an upstream direction, i.e. toward the roll of print media, and advancing the print media in a downstream direction. In operation, the drive rollers draw the print media in an upstream direction whereby the printhead prints an image on the print media starting from a mid-point on the print media to the terminal end thereof. The drive rollers then advance the print media in a downstream direction so that the next printing operation can be overlayed onto the first printed image. The printer reciprocates the print media back and forth until three separate color images are overlayed to achieve a full-color image. The drive rollers are further operative for advancing the print media in a downstream direction to eject the printed image form the printer. The instant printing arrangement has no wasted print media when the printed image is severed from the continuous web.

Three-pass thermal dye transfer color printer with continuous web print

A removable cassette assembly is provided for mounting thermal transfer ribbon in a single-pass multi-color thermal printer. The thermal printer includes a platen roller, a web of receptor media received around the platen roller, a thermal print head, a cantilever support for mounting the print head in corresponding relation to the platen roller, and a pair of drive rollers for advancing the receptor media. The cassette assembly consists of a cassette body, a supply roll for storing a length of unused thermal transfer ribbon, a take-up roll for taking up used ribbon. The rolls are mounted for rotation on the cassette body and the cassette body is received onto the cantilever support for positioning of the ribbon between the print head and the receptor media. The ribbon is driven through the print nip by friction between the receptor media and the print head. The take-up roll engages with a drive motor when the cassette is received onto the cantilever for driving take-up of the ribbon. In a similar manner, the supply roll engages with a clutch mechanism to control pay-out of the ribbon when the cassette is received onto the cantilever.

Cassette assembly for mounting thermal transfer ribbon in a thermal

A slidable transport assembly is provided for a single-pass multi-color thermal printer including a plurality of platen rollers mounted in spaced relation, a web of receptor media received around the platen rollers, a plurality of print heads each mounted in corresponding relation to a respective platen roller, and a pair of drive rollers. The slidable transport assembly consists of a frame having a pair of spaced walls, a base for supporting the frame, a tray mounted on the base for holding the receptor media, and a slide rail for slidably supporting the base. The platen rollers and the drive rollers are mounted between the wall of the frame for integral movement thereof. The transport system is slidably movable between a printing position wherein the platen rollers are positioned beneath the print heads for printing, and a withdrawn position wherein the platen rollers are slidably withdrawn from beneath the print heads for receptor media loading.

Slidable media transport system for a single-pass multi-color thermal

A pivotable mounting assembly for a thermal print head enables the print head to spherically pivot with respect to its associated support arm. The print head is attached to a mounting head and an associated support arm is attached to a cantilever support. A spherical bearing assembly interconnects the mounting head with the support arm and enables the print head to spherically pivot with respect to the support arm. The spherical bearing connection equalizes tangential pressure when the print head is biased against a platen roller. The mounting assembly further includes sub-assemblies for adjusting the rotational and front-to-back alignment of the print head dot line with respect to the support arm, as well as the side-to-side registration of the dot line.

Pivotable mounting assembly for a thermal print head

A seven color, single-pass thermal print engine includes three platen rollers equally spaced over a 180 degree arc, an uninterrupted length of receptor media which is received around the platens, three thermal printheads which make tangential contact with a respective platen, and a pair of output drive rollers for pulling the media around the platen rollers. The print engine further includes a media tensioning system consisting of a media tray, an 'S' shaped media guide with an idler roll mounted inside the curve of the 'S', a tensioning arm for applying tangential pressure to the receptor media and a pair of input pinch rollers. Color transfer ribbons surround each printhead and are contained in re-loadable cassettes. The platens, pinch rollers and tensioning assembly are mounted on a slide assembly so that the platen rollers, the pinch rollers and the tensioning system can be slidably withdrawn from the print engine for receptor media loading and ribbon cassette replacement.

Growing community of inventors

Narragansett, RI, United States of America

Harry D Schofield