Abstract:
A microdot tag for identifying a product, includes a substrate having a miniature marking portion for application to the product, and a handle portion larger in size than the marking portion to enable a user to manually hold the tag by the handle portion. A microdot containing indicia for identifying the product is applied on the marking portion. A frangible portion on the substrate between the marking portion and the handle portion, is provided for enabling the handle portion to be and remain attached to the marking portion during the application of the marking portion to the product, and for detaching the handle portion from the marking portion after the application of the marking portion to the product.
Abstract:
Diamonds are marked by applying apertured tapes bearing identifying indicia to the girdles, applying a flammable layer over the apertured tapes, and then igniting the flammable layer to burn the indicia into the girdles. Preferably, the flammable layer is prepackaged within the apertured tapes.
Abstract:
A substrate is marked by applying a high melting point material over a lower surface of the substrate, and then heating the material layer. Indicia are formed by directing a source of radiant energy through the substrate for impingement on the material layer, and by moving the source and/or the substrate relative to each other.
Abstract:
A security mark is produced on a micro-porous, synthetic paper, structure by changing light transmission properties of light pathways through the structure. The security mark is visible when the structure is illuminated.
Abstract:
A security mark is produced on a micro-porous, synthetic paper, structure by changing light transmission properties of light pathways through the structure. The security mark is visible when the structure is illuminated.
Abstract:
Diamonds are marked by applying apertured stencils bearing identifying indicia to the girdles, applying a fusible coating material over the apertured stencils, and then heating the coating material to fuse the material on the girdles. The stencils can be eliminated, and the indicia can be formed by directing a source of radiant energy at the coating material, and by moving the source and/or the girdle relative to each other.
Abstract:
Diamonds are marked by applying apertured stencils bearing identifying indicia to the girdles, applying a fusible coating material over the apertured stencils, and then heating the coating material to fuse the material on the girdles. The stencils can be eliminated, and the indicia can be formed by directing a source of radiant energy at the coating material, and by moving the source and/or the girdle relative to each other.
Abstract:
A microdot tag for identifying a product, includes a substrate having a miniature marking portion for application to the product, and a handle portion larger in size than the marking portion to enable a user to manually hold the tag by the handle portion. A microdot containing indicia for identifying the product is applied on the marking portion. A frangible portion on the substrate between the marking portion and the handle portion, is provided for enabling the handle portion to be and remain attached to the marking portion during the application of the marking portion to the product, and for detaching the handle portion from the marking portion after the application of the marking portion to the product.
Abstract:
Cells of a liquid crystal device are switched between transparent and dark states or, alternatively, reflectors of a microelectromechanical system are switched between tilted states, to form a marking pattern and control the transmission of a laser beam to an object to be marked.