摘要:
A document printed marking including a first information marking including first luminescent taggants having a first luminescence wavelength band; and a second information marking printed at least partially on the first information marking at an overlap location. The second information marking includes second different luminescent taggant having a second different luminescence wavelength band. The second luminescence wavelength band is spaced from the first luminescence wavelength band such that the first information marking and the second information marking are substantially luminescently non-intrusive with each other at the overlap location.
摘要:
Improvements are provided in processing of documents to increase their security and/or decrease the complexity of testing for authenticity. Methods for printing documents with security markings and methods and apparatus for authenticating documents are described. In one aspect a document is printed with a security marking comprised of an image printed in at least two image segments. The image can be printed with an ink capable of forming images which are visible both to viewing under white light and as fluorescent images when irradiated with ultraviolet light, the segments having features of different sizes. The relative sizes of the two image segments will provide a detectable difference in fluorescent image sharpness. The apparatus provides means, all of which are simple and easily available for carrying out the methods.
摘要:
A document including a substrate and an information marking printed on the substrate. The substrate has a front side, a rear side and a perimeter side edge. The perimeter side edge has a substantially smaller size than the front side and the rear side. The information marking is printed on the perimeter side edge of the substrate. The information marking includes multi-spectral encoding tags adapted to be read in a direction towards the perimeter side edge.
摘要:
A system for storing information including a first partial portion of a printed marking, and a second partial portion of the printed marking. The printed marking comprises first information in a first information storage format. The first partial portion is printed with a first ink. The second partial portion is intermixed with the first partial portion to form the printed marking. The second partial portion is printed with at least one second different ink. The second ink comprises a metameric ink which becomes excited when exposed to an excitation source such that the printed marking contains second different information in a second different information storage format which can be read when the printed marking is exposed to the excitation source.
摘要:
Disclosed are optical codes, e.g., DataMatrix bar codes, of enhanced security and readability and a process for printing one. These codes are comprised of a perimeter finder pattern providing a target area and a pattern of symbology defining a data field in fixed position relative to the target area. Preferably, at least a portion of the optical code so defined is printed in a black fluorescent ink in order to enhance the signal to noise ratio in the environment of other visible, monochrome printing. The invention simplifies the detection of the machine-readable symbology for reading by optical code reader and provides enhanced security features. The image is a covert composite of a visible light readable and a fluorescent image. If fluorescent image is not detected or does not match a reference image, then it can be rejected as an unauthentic, e.g., simple copy image.
摘要:
A printer ink identification system including a detector, an excitation source and a controller. The detector is adapted to detect an excitable feature of an ink forming an indicium on an article. The excitation source is adapted to cause excitation of the excitable feature of the ink. The controller is coupled to the detector. The controller is adapted to initiate a predetermined task based, at least partially, upon input from the detector.
摘要:
A printed indicium including a first section and a second section. The first section includes a first ink having a first color under normal daylight. The second section includes a second different ink. The second ink includes a fluorescent ink which has a second color under normal daylight which is substantially the same as the first color. The fluorescent ink has a fluorescence when subjected to fluorescent-exciting radiation. The second section is imbedded with the first section such that the first and second sections are substantially visually indiscernible from each other in normal daylight.
摘要:
Water-soluble, photosensitive, optically variable (POV) inks exhibit improved OCR readability due to improved infrared absorption properties. The inks can produce images that can be viewed with both visible and ultraviolet light to have physically coincident positive and negative images. The new inks contain at least two types of colorants in addition to the IR absorber and other suitable ingredients. The first colorant comprises a fluorescent dye or pigment emitting light within a characteristic emission band when excited by fluorescent-exciting radiation. The second colorant comprises a carbon black infrared radiation absorbing composition alone or with one or more dyes or pigments having a light absorption band at longer wavelengths than the characteristic emission band of the first colorant or also overlapping the emission wavelength of the first colorant in such a way as to result in a dark color. The inks are formulated to provide higher contrast in the presence of IR radiation while retaining a strong negative correlation between the visible and fluorescent images.
摘要:
A method for printing indicium on an article including steps of providing a supply of ink comprising a multi-signal transmission ink which is adapted to provide an optically visual signal when viewed in normal daylight and adapted to provide a different signal which is adapted to be machine readable; and printing at least a portion of the indicium on the article by halftone printing the multi-signal transmission ink. The portion is adapted to be visually observable in normal daylight. The portion is adapted to be read as a non-halftoned signal by a machine even though the portion is halftone printed.
摘要:
Color imparting compositions for ink jet printer inks, as well as inks with such color imparting compositions therein, which can be used in a commercially available ink jet printer or the ink jet printer of a postage metering system to print machine readable information based indicia, such as postage, on a substrate, such as an envelope, are disclosed. The color imparting composition includes a water soluble black colorant material adapted to absorb light in a wavelength range between about 400 to 650 nm, such as Reactive Black 31 dye or Direct Black 195 dye, and a water soluble cyan colorant material having a molar extinction coefficient of at least 10,000 at a wavelength maximum in the range of about 580 to 750 nm, such as Direct Blue 307, Direct Blue 199 or Acid Blue 9. The weight ratio of the black colorant material to the cyan colorant material in the color imparting composition is in the range of about 50 to 1 to about 5 to 6.