Abstract:
A micro-optic security device (100) with zonal color transitions includes a planar array of focusing elements (140), an image icon layer (120) with a plurality of retaining structures (710) defining isolated volumes at a first depth within the image icon layer. The security device further includes a first zone of image icons (350), the first zone of image icons having a first predefined subset of the plurality of retaining structures which contain cured pigmented material of a first color. The micro-optic security device also includes a second zone of image icons (360), including a second predefined subset of the plurality of retaining structures, with isolated volumes of retaining structures of the second predefined subset of the plurality of retaining structures containing cured pigmented material of a second color, wherein the second color contrasts with the first color.
Abstract:
An adhesive (500) suitable for use in security documents (100) (for example, currency, passports, tickets, etc.) includes a plurality of polymers (505), that collectively exhibit tackification (510), resistance to aqueous agents (515), and solvent resistance (520), and a cross- linker (525) selected to be activated to chemically react with one or more polymers of the plurality of polymers, at a temperature in a predetermined range of temperatures.
Abstract:
An IR and/or UV machine-readable optical security device ( e.g ., micro-optic security thread) that is made up of at least one IR~absorbing component with a characteristic IR signature detectable at two or more IR-wavelengths, at Ieast one UV- absorbing component with a characteristic UV signature detectable at two or more UV- wavelengths, at least one IR-absorbing component that absorbs IR light and emits light at a different invisible wavelength, at least one UV-absorbing component that absorbs UV light and emits light at a different invisible wavelength, or a combination thereof, Is provided. The IR and UV machine-readable features do not interfere with the optical effects projected by the optical material.
Abstract:
A method for applying a security device (e.g., a micro-optic security thread) to a fibrous web during manufacture is provided. By way of the inventive method, the security device is preferably applied onto the fibrous web at or near a couch roll or similar tool of a paper machine when the fibrous web constitutes a sufficiently consolidated, fully formed wet web. Papers made in accordance with the inventive method, when subjected to the Circulation Simulation Test, showed minimal damage at the paper/security device interface. Moreover, the surface-applied security devices showed acceptable levels of intaglio ink adhesion, and the papers had higher cross-direction (CD) tensile strength and much less show-through on opposing sides thereof.
Abstract:
The invention generally relates to a security sheet or document having one or more enhanced watermarks. In one exemplary embodiment, the inventive security sheet or document is a single-ply paper that is made up of a paper layer including one or more watermarks, and a micro-optic security device {e.g., a patch or thread) that at least partially covers an upper or face portion of the watermark(s). The overlying patch or thread increases the durability of the watermark(s), thereby allowing for the watermark(s) as well as reduced fiber density areas therein to be made larger, and further allowing for the reduced fiber density areas to be made thinner. In a preferred embodiment, the micro-optic security device projects one or more synthetic images that coordinate or link in with the watermark design(s). In a more preferred embodiment, the micro-optic security device offers a machine detectable/readable feature in the form of enhanced IR- brightness, especially when measured in transmission. As will be readily appreciated, the inventive security sheet or document offers greatly improved counterfeit-resistance.
Abstract:
A mobile lift crane (10) includes a central crane unit (20), a boom unit (40) and a counterweight unit (60). The central crane unit (20) has a carbody (22), moveable ground engaging members (24) and a rotating bed (23) mounted to the ground engaging members (24) with a rotatable connection such that the rotating bed (23) can swing with respect to the ground engaging members (24). The boom unit (40) has a support member (42), at least one moveable ground engaging member (44), and a boom (46) pivotally mounted on the support member (42). The counterweight unit (60) has counterweight (62, 64) on a support member (66). Rigging (52, 54) connects the boom (46) and counterweight unit (60) such that a load lifted by the boom (46) can be counterbalanced by the counterweight (62, 64). The boom unit (40) and counterweight unit (60) are connected to the central crane unit (20) by structural members (82, 84) that carry compressive loads and maintain the boom unit (40), the rotating bed (23) and the counterweight unit (60) in lateral alignment with each other, but allow relative vertical movement between the boom unit (40), the rotating bed (23) and the counterweight unit (60). A main mast (48) is pivotally mounted on the combination of the central crane unit (20), the boom unit (40) and the structural member (82) between the central crane unit (20) and the boom unit (40). In another embodiment, a counterweight unit (260) with a swing axis and boom unit (240) are connected directly together with a structural member (282). Ground engaging members (244) on the boom unit (240) can be rotated relative to a boom unit support member (242) such that the boom unit (240) i) can travel in an arc around the swing axis of the counterweight unit (260) and ii) travel in direction in line with the structural member (282).
Abstract:
A security device that increases the number of design options available for a machine testable security feature formed in part from a light absorbing (e.g., magnetic) material, while more effectively hiding or concealing this material, is provided. The inventive security device achieves these results by physically separating this security feature from a visually detectable or public security feature. Also provided by way of this invention is a process for preparing the inventive security device as well as a security document that employs one or more such devices.
Abstract:
A security thread detector for verifying the authenticity of banknotes. In the preferred embodiment, the invention comprises a housing with a passage through which banknotes can be passed, wherein the housing also comprises a waveguide, a microwave oscillator for generating microwaves and two resonating slots on a wall of the waveguide, and a microwave detector. After a banknote is inserted through the passageway, the microwave diode produces an analog signal that is proportional to the microwave strength. The diode and the slots are arranged such that the radiated power from each slot is one hundred eighty degrees out-of-phase. If a banknote has no security thread, then the detector receives a balanced signal. If the banknote contains a security thread, the thread interferes with one of the radiating slots. This interference causes an imbalance condition and a corresponding signal is sent from the detector diode. The resulting signal is then sent to a microprocessor which activates an appropriate indicator. This indicator notifies the user of the presence or absence of a security thread; thus, the user can determine whether the banknote is counterfeit.
Abstract:
A method for inking a three-dimensional micro-optic structure includes jetting a first volume of a first radiation-curable ink (207) having a first pigment concentration to a first portion of a three-dimensional icon layer (201), wherein the first portion of the three-dimensional icon layer has a first volumetric fill requirement, jetting a second volume of the first radiation-curable ink (209) to a second portion of the three-dimensional icon layer, wherein the second portion of the three-dimensional icon layer has a second volumetric fill requirement, blading excess radiation-curable ink from the three-dimensional icon layer and radiation curing remaining radiation-curable ink.
Abstract:
A tensioning bracket includes a tensioning bolt (301) having a crown gear (311) proximate to a head of the tensioning bolt. The tensioning bracket further includes a body portion (201), the body portion including a through hole (205) configured to receive the tensioning bolt, and an internal channel (207) disposed substantially perpendicular to an axis (215) of the tensioning bolt. Additionally, the tensioning bracket includes a spring (209) disposed within the internal channel, a ratchet pin (211) disposed in part within the internal channel and configured to engage the spring at a first end, and a crown gear affixed to the tensioning bolt at a second end of the ratchet pin, and a worm gear (108) retained within the body portion and connected to an end of the tensioning bolt distal from the head of the tensioning bolt.