Classifications

• • G—PHYSICS
  • G06—COMPUTING OR CALCULATING; COUNTING
  • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
  • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
  • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
  • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
  • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
  • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
  • G06K19/07718—Constructional details, e.g. mounting of circuits in the carrier the record carrier being manufactured in a continuous process, e.g. using endless rolls
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
  • D21F1/00—Wet end of machines for making continuous webs of paper
  • D21F1/44—Watermarking devices
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
  • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
  • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
  • D21H21/42—Ribbons or strips
• • G—PHYSICS
  • G06—COMPUTING OR CALCULATING; COUNTING
  • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
  • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
  • G06K19/02—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the selection of materials, e.g. to avoid wear during transport through the machine
• • G—PHYSICS
  • G06—COMPUTING OR CALCULATING; COUNTING
  • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
  • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
  • G06K19/02—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the selection of materials, e.g. to avoid wear during transport through the machine
  • G06K19/022—Processes or apparatus therefor

Definitions

• This invention is directed to improvements in paper incorporating an elongate impermeable element, to a method of making such paper and to documents made therefrom.
• security paper As a security feature, elongate security elements such as threads, strips or ribbons of, for example, plastics film, metal foil, metallised plastic, metal wire. These security elements are included in the thickness of security paper to render imitation of documents produced from the paper more difficult. These elements help in the verification of security documents as they render the view of the documents in reflected light different from that in transmitted light.
• elongate security elements such as threads, strips or ribbons of, for example, plastics film, metal foil, metallised plastic, metal wire.
• These security elements are included in the thickness of security paper to render imitation of documents produced from the paper more difficult. These elements help in the verification of security documents as they render the view of the documents in reflected light different from that in transmitted light.
• windowed thread paper As a further security feature, it has been found to be particularly advantageous to provide windows in one side of the surface of the paper, which expose such elongate elements at spaced locations. Examples of methods of manufacturing such paper incorporating security elements with or without windows as described below. It should be noted that references to "windowed thread paper” include windowed paper incorporating any elongate security element.
• EP-A-0059056 describes a method of manufacture of windowed thread paper on a cylinder mould paper- making machine.
• the technique involves embossing the cylinder mould cover and bringing an impermeable elongate security element into contact with the raised regions of an embossed mould cover, prior to the contact entry point into a vat of aqueous stock. Where the impermeable security element makes intimate contact with the raised regions of the embossing, no fibre deposition can occur.
• the contact points are present as exposed regions which ultimately form windows, visible in reflected light, on one side of a banknote paper.
• WO-A-93/08327 describes a method of manufacturing windowed thread paper on a Fourdrinier paper-making machine.
• a rotating embedment means with a modified profile for embossing, is used to drive an impermeable elongate security element into draining paper stock, on a Fourdrinier wire.
• the profile of the embedment means is such that raised portions are provided which remain in contact with the security element during the embedment process.
• paper fibres are prevented from collecting between the security element and embedment means, such that the security element is subsequently exposed in windowed regions of paper.
• the security element used in windowed or non-windowed paper is oscillated within the paper substrate by a small amount, for example, plus or minus 6mm from either side of a centre line. This is primarily to assist cutting and guillotining across the thread tracks of stacks of 500 sheets. If the thread was not oscillated, the guillotine blade would be presented with a very sharply defined area, of say 1 to 2mm wide, of polymer/metal/paper built up from 500 sheets. This tends to blunt or even chip the cutting blade. By oscillating the thread, this area is distributed over a wider area of 10 to 15mm, easing the passage of the blade through the 500 sheet stack. The result of thread oscillation is that only parallel bars can be used in the design of the windows, if the banknotes made from the paper are all to look the same .
• an anti-falsification paper which incorporates a wide impermeable security strip with a width between 2mm and 4mm.
• the paper is of multiply design, with at least two paper layers produced on separate paper machines.
• the security strip is embedded in a first ply and has perforations along the edges which permit water drainage and hence paper fibre deposition along the edges of the thread.
• the front of the strip is laid down over raised areas on the embossed cylinder mould cover before the raised areas enter the vat of paper stock so as to create windows of exposed strip in the contact regions.
• the width of the raised areas is narrower than the strip width to permit permeation through the perforations of the strip by paper fibres.
• the width of strip is so great that the paper formed on the back of the paper has flaws in the form of arbitrary holes in the region of the strip.
• a second ply of ordinary paper is independently formed and the two are laminated together and further processed, the second ply thereby covering the flaws in the back of the first ply and providing at least one homogenous paper surface.
• a third ply is laminated over the front of the first ply to wholly embed the security strip.
• the width of the strip is selected to be so wide that no paper forms on the back of the first paper ply to provide a continuous exposed area on the back.
• the front of the strip is laid on a continuous raised area on the mould cover before the raised areas enter the vat of paper stock to provide a continuous exposed area on the front.
• a second ply of paper is then laminated to the first ply to form the finished security paper and give a homogenous paper layer on one side and a continuous exposed strip on the other.
• the width of the elongate element which can be used is very limited.
• the areas of the threads which are exposed are restricted in terms of shape, due to the limitation imposed by the required embossings, and in terms of the areas, due to the nature of the paper-making technique itself.
• One object of the present invention is therefore improved method of manufacturing to provide a paper containing a wide impermeable substrate which can be used as a security or non-security feature to describe windows or decorative patterns.
• a method of making single ply paper having an an elongate impermeable strip at least partially embedded therein comprising the steps of blinding one or more selected areas of a porous support surface, depositing a first layer of paper fibres onto the porous support surface around the blinded areas, bringing the strip to lie in contact with the blinded areas of the support surface such that at least edges of the strip over lie the deposited fibres, and depositing a further layer of paper fibres over the first layer and the impermeable strip to securely embed the edges of the strip within the paper, said blinded areas being impermeable to substantially prevent the deposition of fibres thereon before the security element is laid thereover and to thereby form a plurality of discrete translucent or transparent windows in a first surface of the paper in which regions of one side of the strip are exposed, wherein substantially no paper fibres are deposited along an opposite side of the length of the strip in a region between the edges to thereby expose a continuous area of the strip at a second
• the preferred prior art production methods for windowed security paper require an embossed cylinder mould cover.
• the use of blinding is not generally used in paper-making techniques for the very reason that the paper is preferred to be uniform and consistent.
• the appearance of holes and perforations is not a feature which is usually required.
• One exception is the paper used for making tea bags, but the method of manufacturing such paper does not include blinds.
• the impermeable strip contacts the support surface after some paper fibres have already been deposited round the blinded areas, it prevents any further fibre deposition over the blinded areas preserving the designs created in the blinding operation as clear areas.
• embossed cylinder moulds covers restricts the width of security threads which can be embedded, with the method of the present invention it is possible to produce a document with any width of impermeable strip, up to full document width, with paper "coatings" in any design, including watermarks, on the front side of the document.
• the back of the paper can be made to contain a continuous exposed strip which can be used for the display of indicia and the like.
• An adhesive is preferably applied to tie one side of the strip before bringing that side into contact with the support surface.
• An adhesive is preferably applied to one or more portions of the other side of the strip.
• the strip is preferably not oscillated during manufacture of the paper. This provides an advantage in design terms as- it means that more precised and detailed patterns can be created around the strip.
• the invention further provides single ply paper made by the above mentioned method having first and second surfaces and an elongate impermeable strip, in which the edges of the strip are embedded fully between the first and second surfaces, and a continuous strip of a central section of the strip is exposed at the first surface of the paper and at least partially covered by a layer of paper of reduced opacity forming the second surface.
• the second surface of the paper is preferably provided with a plurality of discrete windows in which portions of the strip are exposed at intervals.
• the width of the strip preferably lies in the range of 6 to 25mm.
• Such a broad width advantageously ensures that few or no fibres are deposited thereon.
• the width of the strip more preferably lies in the range of 8 to 10mm.
• the strip bears indicia, images or information.
• the strip is wholly or partially metallised or bears one or more holographic images.
• the strip has preferably one or more colour shift areas and/or has at least one security embossing.
• the strip may be printed on one or both sides and/or may bear a liquid crystal material.
• the strip preferably has a thickness of 25 to 100 micrometers and more preferably of 50 micrometers.
• One side of the strip is preferably coated with an adhesive.
• the other side of the strip may be partially coated with an adhesive in regions such that some paper is formed in the adhesive regions to provide paper patterns along the exposed central section of the strip .
• the invention also provides a document produced from the aforementioned paper or a security document.
• Figure 1 is a cross-sectional side elevation of a schematic of a paper-making vat for use in the method and manufacturing of paper according to the present invention
• Figures 2 to 6 are cross-sectional side elevations of the steps involved in the method of forming paper according to the present invention
• Figure 7 is a plan view of the section of the cylinder mould cover for use in making an alternative embodiment of paper according to the present invention by blinding only;
• Figure 8 is a cross-sectional side elevation of the cylinder mould cover of figure 7 on the line VIII- VIII;
• Figure 9 is a cross sectional side elevation paper formed on the cylinder mould cover of Figure 7, taken on the line IX-IX Figure 10;
• Figure 10 is a plan view of the paper Figure 9;
• Figure 11 is a cross-sectional side elevation of the paper of Figure 10 taken on the line XI-XI;
• Figures 12 to 16 are similar views to those of Figures 7 to 11 showing a more complex design formed by blinding
• Figure 17 is a plan view of a section of a cylinder mould cover for use in making one embodiment of paper according to the present invention by embossing and blinding;
• Figure 18 is a cross-sectional side elevation of the cylinder mould cover of Figure 7 on the line XVIII-XVIII;
• Figure 19 is the same cross-sectional elevation as Figure 8 showing partial deposition of paper fibres during a paper-making process
• Figure 20 is the same cross-sectional elevation as Figures 18 and 19 showing an impermeable element laid over the cylinder mould cover;
• Figure 21 is the same cross-sectional elevation as Figures 18 and 20 showing the paper formed on the cylinder mould cover of Figure 17;
• Figure 22 is a plan view of paper formed using the cylinder mould cover of Figure 17 by the steps shown in Figures 18 to 21;
• Figures 23 to 26 and 28 and 29 are plan views of alternative papers made according to the invention using different cylinder mould cover layouts.
• Figure 27 is a side cross-sectional elevation of the paper of Figure 26 on the line XXVI-XXVI.
• a porous support surface for example in the form a cylinder mould - cover 10
• the mould cover 10 has no raised areas formed by embossing, such as those described in EP-A-0070172, but selected areas 12 regions are blinded by fixing blinding material to the mould cover 10.
• the blinding material is typically a metal which is welded to the cylinder mould cover 10 (see Figures 2, 7 and 8), and these blinds define the shape of windows 17 formed in the final paper 16.
• the blind material 12 may also be wax, polymer or any other material which can be securely attached to the cylinder mould cover 10 to prevent drainage and hence fibre deposition.
• the term "window" includes a transparent or translucent region in the paper of regular or irregular shape and occurrence.
• the cylinder mould cover 10 is rotated in a vat of paper stock 11 as illustrated in Figure 1.
• a wide elongate impermeable substrate 13 preferably having a width of 6mm or greater, is brought into contact with the cylinder mould cover 10 below the level of the paper stock 11.
• a layer 14 of paper fibres has already been deposited onto the cylinder mould cover 10 to form, say, a 40gsm sheet (see Figures 3 and 4).
• further paper fibres 15 are deposited on top of and around the sides of the impermeable substrate 13 to form the remainder of the sheet 15 to, typically, 80 to 90gsm (see Figures 5 and 6 or 9) .
• no oscillation of the impermeable substrate 13 is allowed to take place during manufacture.
• the blinds used have variable height and/or width to produce various degrees of transparency in defined areas depending on whether the blinding material is covered by the strip 13 or not.
• the cylinder mould cover 10 is produced in a known way, using dies to form the wire by embossing to form one or more raised areas 19. These raised areas 19 define the shape of the windows
• the width of the raised areas 19 is such that, as the impermeable strip 13 is brought into contact therewith below the level of the stock 11, its edges overhang the raised areas 19 on either side, as shown in Figure 20.
• the impermeable strip 13 may have a uniform adhesive or other appropriate coating - li ⁇
• the coated side of the strip 13 lies against the mould cover 10 (see Figure 22) , to ensure that full bonding of the fibres and strip 13 takes place in the fibre bridges 18 and along the edges of the strip 13.
• Paper formation continues around the mould cover 10 forming over the edges of the strip 13.
• Few or no fibres are deposited over the non-adhesive coated areas mainly due to the width of the strip 13 as the substrate, from which it is preferably made, is preferably hydrophobic.
• the adhesive coating is preferably hydrophilic and will tend to draw fibres away from the strip surface. The few fibres that are deposited on the non-adhesive coated areas will be subsequently removed by the press rolls and in the drying cylinders of the final stages of the typical paper-making process.
• a hydrophobic coating may be used on the non-adhesive coated areas, to assist in preventing any fibre covering.
• This wide strip 13 of impermeable substrate may be used as a display surface for indicia, for example, de-metallised images, holographic images, colour- shifting areas, print or combinations of any or all of these which are highly visible in the large windows 17.
• indicia for example, de-metallised images, holographic images, colour- shifting areas, print or combinations of any or all of these which are highly visible in the large windows 17.
• the windows 17 will be partially translucent or wholly transparent.
• the metallisation or colouring on the fully embedded edges of the strip 13 also become visible. These edges may be provided with indicia which bleed from or complement any indicia contained on the exposed portion of the strip 13.
• the windows 17 could be, for example, 20mm square or 5mm x 15mm rectangles .
• the strip 13 When viewed from the felt side of the paper 16, the strip 13 itself can be seen in a continuous exposed area as a transparent, shiny, coloured or metallised area which may bear indicia, information or imagery.
• the area may extend along the full length or width of the paper 16 or a substantial part thereof.
• the blinds with or without embossings form an image or geometric pattern other than straightforward rectangular or square windows 17, this pattern can be seen along the length of the strip 13, with the transparent strip 13 being wholly or partially visible with these windows.
• One preferred material for the strip 13 is a PET strip of, say, 50 micrometers thickness as this would help to maintain the "bulk" of the paper 16 over the windowed region.
• other materials such as OPP, PE or PK with other thicknesses may be used.
• de-metallised images are used which have large areas of transparent regions to provide a greater contrast within the windows between the metallised and non-metallised areas. When the paper 16 is viewed from the wire side of the paper 16, the visibility of the paper bridges 18 between the windows 17 is enhanced by its contrast to the metallisation.
• an adhesive may be applied uniformly to one side of the strip 13, whilst the other side is coated with adhesive in bands and slit so that only the edges of the element 13 have the adhesive coating.
• Adhesive patterns could additionally be applied by a transfer or other type of printing process to provide additional paper patterns on the felt side of the paper 16.
• an adhesive or coating may be applied to the whole of both sides of the strip 13. This results in the deposition of a layer of paper on the felt side, such that the strip 13 is wholly covered on that side. In the region of the second part of the strip 13 the translucent stripe 21 is still clearly visible in comparison to the surrounding paper 16.
• a standard adhesive or coating used in known - processes for making embedded windowed security thread could be used, or any form of thermally activated adhesive or a water based adhesive which provides a hydrophilic surface to hold paper fibres during the initial stages of paper formation.
• the strip 13 can advantageously be used as an information carrier and/or can contain a wide variety of known security features. These may include the following;
• de-metallised designs which may comprise areas of substantially removed metal to take advantage of the transparency of the base film and provide a large area of transparent window 17;
• holographic designs which could comprise areas of full metal and half-tone screens to provide partial transparency and/or no metal. Under - certain viewing conditions, with no metal, a holographic image is still visible;
• the print may be on either side of the strip or both on the same side, with one colour hidden by the other on one side but showing through on the other side;
• liquid crystal films such as those described in WO-A-94/02329, in which colour changes are visible when a molecular liquid crystal material is coated onto a watermark. Due to the scatter effect of the paper surface, a large percentage of the possible colour intensity is lost. By using a fully transparent window, a very vivid colour change is visible both in reflection and transmission;
• security embossing of transparent film with a security design e.g. a treasury seal
• a security design e.g. a treasury seal
• These may be blind embossed to produce a tactile/visible feature or could include printing inks to further enhance visibility;
• contact measurements in which at least one side of the strip is available for contact along its entire length. Measurements can include resistance measured on a current being passed through the strip; contact to microcircuitry embedded within the strip; contact to activate a material within the strip, e.g., PVDF electrochromic; conductive polymers;
• Figures 25 and 26 illustrate such a feature in which paper fibres are selectively deposited to form images, patterns, alphanumeric numerals etc. e.g., 19a and 19b.
• the strip 13 could be perforated with holes of various shapes to provide novel features or possibly machine readability, e.g. via airstreams, as shown in Figures 28, 29.
• the paper 16 described above can be cut and printed to make all forms of documents, including security documents such as banknotes, cheques, travellers cheques, identity cards, passports, bonds etc.
• a second ply of paper substrate could be laminated to paper as described above to completely obscure the visible effects of the strip 13 one side, if required.

Landscapes

• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Theoretical Computer Science (AREA)
• Computer Hardware Design (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Paper (AREA)
• Credit Cards Or The Like (AREA)
• Laminated Bodies (AREA)
• Developing Agents For Electrophotography (AREA)
• Medicinal Preparation (AREA)
• Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Priority Applications (12)

Applications Claiming Priority (2)

Publications (1)

Family

ID=10845125

Family Applications (1)

Country Status (19)

Cited By (93)

Families Citing this family (75)

Citations (2)

Family Cites Families (14)

• 1998
  • 1998-12-29 GB GBGB9828770.9A patent/GB9828770D0/en not_active Ceased
• 1999
  • 1999-12-16 RU RU2001121158/12A patent/RU2199618C1/ru not_active IP Right Cessation
  • 1999-12-16 US US09/869,166 patent/US6616803B1/en not_active Expired - Fee Related
  • 1999-12-16 HU HU0104929A patent/HUP0104929A3/hu unknown
  • 1999-12-16 AT AT99962312T patent/ATE259906T1/de not_active IP Right Cessation
  • 1999-12-16 JP JP2000591271A patent/JP2002533588A/ja active Pending
  • 1999-12-16 EP EP99962312A patent/EP1141480B1/en not_active Expired - Lifetime
  • 1999-12-16 ES ES99962312T patent/ES2214057T3/es not_active Expired - Lifetime
  • 1999-12-16 PT PT99962312T patent/PT1141480E/pt unknown
  • 1999-12-16 WO PCT/GB1999/004257 patent/WO2000039391A1/en not_active Ceased
  • 1999-12-16 AU AU18691/00A patent/AU1869100A/en not_active Abandoned
  • 1999-12-16 UA UA2001064527A patent/UA69427C2/uk unknown
  • 1999-12-16 DE DE69914944T patent/DE69914944T2/de not_active Expired - Lifetime
  • 1999-12-16 DK DK99962312T patent/DK1141480T3/da active
  • 1999-12-16 BR BRPI9916646-1A patent/BR9916646B1/pt not_active IP Right Cessation
  • 1999-12-16 PL PL349008A patent/PL192246B1/pl unknown
  • 1999-12-16 CA CA002358109A patent/CA2358109A1/en not_active Abandoned
  • 1999-12-16 CN CN99815263A patent/CN1124378C/zh not_active Expired - Lifetime
  • 1999-12-16 KR KR1020017008259A patent/KR100581255B1/ko not_active Expired - Lifetime
• 2009
  • 2009-05-15 JP JP2009118688A patent/JP4861451B2/ja not_active Expired - Fee Related

Patent Citations (3)

Also Published As

Similar Documents

Legal Events