Patents Assigned to Portals Limited
  • Patent number: 7362046
    Abstract: Display 100 has three adjacent display tiles 10, each having a mould plastics support 11, a glass panel 12 incorporating the OLED element and an interface pcb 17. These tiles 10 form part of a full-color advertising screen of dimensions 1.2 meter by 1.8 meter, used in indoor public places.
    Type: Grant
    Filed: March 29, 2004
    Date of Patent: April 22, 2008
    Assignee: Image Portal Limited
    Inventor: Mark Aston
  • Patent number: 6063239
    Abstract: The invention relates to security paper and in particular to a method for the manufacture of security paper that is provided with high-quality watermarks. In particular such a method comprises forming a papermaking suspension comprising cellulosic fibers and polyvinyl alcohol fibers, which polyvinyl alcohol fibers are soluble in water at temperatures of from 95 to 100 degrees C, dewatering the papermaking suspension through an emboseed wire mesh or other embossed means, wherein the embossing creates a profile of peaks and troughs corresponding to the light and dark areas of the watermark, and the formed paper after dewatering with the watermark feature is thereafter dried to provide the resulting security paper.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: May 16, 2000
    Assignee: Portals Limited
    Inventors: Paul Howland, Jonathan Paul Foulkes
  • Patent number: 5928471
    Abstract: The invention relates to improvements in security features in paper and in particular to a method of making paper and transparentising selected areas of paper to provide enhanced security features. The invention thus provides a method of making paper comprising the step of depositing fibers (12) onto a support surface (13) to form a porous absorbent sheet (14), applying a transparentising resin to at least portion of said porous sheet and subsequently impregnating the porous sheet with a sizing resin.
    Type: Grant
    Filed: March 20, 1996
    Date of Patent: July 27, 1999
    Assignee: Portals Limited
    Inventors: Paul Howland, Robert John Furley
  • Patent number: 5868902
    Abstract: The present invention relates to a method for producing security paper which includes a security feature. The method comprises forming paper in a wet state, which paper incorporates on or more security features, applying to the paper a sizing agent, thereafter applying to one or both sides of the sized paper a coating comprising an unpigmented polyurethane. The unpigmented polyurethane may optionally comprise a functional additive provided that the presence of the functional additive does not increase the opacity of the paper by more than 1%. After the polyurethane has been applied the paper is dried. The coating composition provides a film, when cast on a glass surface, having a Konig hardness of from 15 to 130 seconds.
    Type: Grant
    Filed: September 10, 1997
    Date of Patent: February 9, 1999
    Assignee: Portals Limited
    Inventors: Paul Howland, Jonathan Paul Foulkes
  • Patent number: 5678863
    Abstract: A means of identification or document of value which includes a paper or polymer region, in particular, bank notes, passports, identification cards or any other document of sufficient value to make it liable to be copied or counterfeited, includes a watermark in the region and a liquid crystal material applied to the region and to at least a part of the watermark to produce optical effects which differ when viewed in transmitted and reflected light.
    Type: Grant
    Filed: January 23, 1995
    Date of Patent: October 21, 1997
    Assignee: Portals Limited
    Inventors: Malcolm Robert Murray Knight, Roland Isherwood, Sarah Anne Rocca, Robin Edward Godfrey, Craig Harvey Nelson
  • Patent number: 5631039
    Abstract: The present invention relates in one aspect to a method of manufacture of a security thread suitable for use in security articles including security paper such as that used for banknotes. In the method a magnetic metal is deposited on a film of polymeric substrate as the substrate passes through a solution containing the magnetic metal and a preparatory operation is carried out on a surface of the substrate prior to immersion of the substrate in the solution. The preparatory operation ensures that magnetic metal is deposited on the substrate in a pattern such that when the security thread is produced from the film by cutting the film the magnetic metal on the security thread has a specific pattern and provides both a visually discernible security feature and a magnetically detectable security feature.
    Type: Grant
    Filed: August 12, 1994
    Date of Patent: May 20, 1997
    Assignee: Portals Limited
    Inventors: Malcolm R. M. Knight, Duncan H. Reid, Jeffrey A. Harrison
  • Patent number: 5405500
    Abstract: This invention relates to a method of making sheet materials and security paper having partially embedded therein an elongate security element which is at least substantially exposed at one surface of the sheet at a plurality of spaced locations, which method comprises the steps of depositing fibres onto a moving support surface, supplying an elongate security element to overlie rotatable embedment means, which embedment means comprise a plurality of spaced-apart raised portions having recesses therebetween, introducing the security element into the fibres with rotation of the embedment means such that some fibres move into said recesses between the security element and the embedment means so that said security element is covered by fibres, and substantially preventing fibres from penetrating between the raised portions and the overlying security element.
    Type: Grant
    Filed: May 5, 1993
    Date of Patent: April 11, 1995
    Assignee: Portals Limited
    Inventor: Malcolm R. M. Knight
  • Patent number: 5388862
    Abstract: A security article such as a banknote, credit card, identity card or travel document includes a security element which is visually detectable in transmitted light to display portions which transmit light and portions which are opaque, the security element including a plurality of layers that include a light-transmitting support layer and two or more series of opaque regions. The arrangement of the opaque regions is such that at certain parts of the security element the regions overlap to prevent light transmission and elsewhere along its length the opaque regions do not overlap or only partially overlap such that light transmission through the security element occurs.
    Type: Grant
    Filed: May 19, 1993
    Date of Patent: February 14, 1995
    Assignee: Portals Limited
    Inventor: David Edwards
  • Patent number: 5093184
    Abstract: This invention is concerned with security paper for bank notes, cheques and like documents in a security strip of enhanced security which is more difficult to counterfeit than the present bank notes containing window threads.
    Type: Grant
    Filed: May 29, 1990
    Date of Patent: March 3, 1992
    Assignee: Portals Limited
    Inventor: David J. Edwards
  • Patent number: 4943093
    Abstract: Security papers according to the invention comprise opposed surfaces for the provision of printing to identify a document formed from the paper, and positioned at least partially between the two surfaces of the paper as a public security feature a security device of not more than 5 mm width, which device comprises a flexible, water-impermeable substrate with a layer of metal on one or both sides of the substrate, there being present on one side of the device a continuous metal path along its length, wherein said device has metal-free portions of between 10% and 50% of the area of the device, said metal-free portions along the length of the device providing a repeating pattern, design, indicia or the like with at least some of the metal-free portions across the tranverse direction of the device being wholly surrounded by metal. The metal-free portions may provide characters of a language, such as letters of the English alphabet.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: July 24, 1990
    Assignee: Portals Limited
    Inventors: Raymond J. Melling, Malcolm R. M. Knight
  • Patent number: 4462867
    Abstract: A method of forming a paper comprises depositing paper fibres onto a support surface from a furnish by drainage, laying a strip having fibre deposition blocking regions and fibre deposition permitting regions onto the deposited fibres and continuing deposition to form a paper having the strip partially embedded in the paper and partially exposed.
    Type: Grant
    Filed: July 12, 1982
    Date of Patent: July 31, 1984
    Assignee: Portals Limited
    Inventor: James S. Fuller
  • Patent number: 4462866
    Abstract: A sheet material such as paper is provided during manufacture with an elongate element partially disposed within the thickness of the paper sheet but exposed at spaced locations one one side of the sheet. The paper may be used in making security documents such as banknotes and checks.
    Type: Grant
    Filed: February 18, 1982
    Date of Patent: July 31, 1984
    Assignee: Portals Limited
    Inventors: Alan J. Tooth, Neil Pask
  • Patent number: 4183989
    Abstract: A security paper which contains a security device e.g. a strip, thread or planchette having at least two machine verifiable security features thereon, one of which is a magnetic material, which may be magnetically coded or printed in a predetermined pattern on the device, and a second of which is a luminescent material, an X-ray absorbent or a metal. The provision of several features on one device provides a large increase in document security.
    Type: Grant
    Filed: November 29, 1977
    Date of Patent: January 15, 1980
    Assignee: Portals Limited
    Inventor: Alan J. Tooth
  • Patent number: 4037007
    Abstract: Paper for use in the production of security documents incorporates planchettes which have incorporated therein or applied thereto a substance which is capable of taking part in a color-forming reaction. A second substance which is capable of taking part in a different color-forming reaction may be incorporated in other planchettes. When a reagent or reagents is or are applied to the security document to verify the authenticity of the document the substances change color by the color-forming reactions.Examples of security documents which may be made from such paper are bank cheques, travellers' cheques and other negotiable documents convertible to cash.
    Type: Grant
    Filed: July 30, 1975
    Date of Patent: July 19, 1977
    Assignee: Portals Limited
    Inventor: William Albert Wood