Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/40—Manufacture
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
  • B42D25/29—Securities; Bank notes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/40—Manufacture
  • B42D25/405—Marking
  • B42D25/43—Marking by removal of material
• • 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
  • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
  • D21H25/005—Mechanical treatment
• • 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
  • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
• • B42D2035/36—
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/30—Identification or security features, e.g. for preventing forgery
  • B42D25/333—Watermarks
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/30—Identification or security features, e.g. for preventing forgery
  • B42D25/346—Perforations

Definitions

• the invention relates to a security paper for the production of security or value documents, such as banknotes, ID cards and the like.
• Security documents or documents of value are often provided with various authenticity features for the purposes of security, which permit verification of the authenticity of the security paper or value document and at the same time serve as protection against unauthorized reproduction.
• the term “security paper” here refers to the unprinted paper, which is usually present in quasi-endless form and is processed further at a later point in time. "Document of value” is a document which has been completed for its intended use. Securities for the purposes of the present invention are in particular banknotes, stocks, bonds, certificates, vouchers, checks, high-quality admission tickets, but also other counterfeit-sensitive papers, such as passports and other identity documents, as well as product security elements, such as labels, seals, packaging and the like.
• the simplified term “security paper” or "value document” below includes all such documents and product security means.
• the document WO 95/10420 describes a document of value into which a continuous opening is punched after its production, which is subsequently closed on one side with a covering film projecting on all sides.
• the cover film is transparent at least in a partial area, so that when attempting to copy the document of value, the substrate shines through and is correspondingly reproduced by the copier.
• counterfeits can be easily recognized.
• the hole created by punching can be generated by a counterfeiter as well.
• this area can subsequently be punched out analogous to the real value document and resealed with a suitable cover film. Such counterfeits are difficult to recognize.
• the object of the invention is to provide a security paper which avoids the disadvantages of the prior art.
• the security paper is intended to ensure the high degree of counterfeiting security of the openings produced during papermaking with high reproducibility. connect in production and good visibility of the authenticity features formed by the openings.
• a generic security paper includes at least two through openings, wherein a first one of the through openings is formed during papermaking and has characteristic irregularities in the peripheral area, and a second of the through openings is made after papermaking by cutting or punching with a sharply defined edge area is.
• the outline shapes of the first and second through openings are preferably in a sense context.
• the outline shapes of the first and the second through opening represent information that is related or complementary to one another, such as a picture motif, characters or an encoding.
• the second, sharply defined opening is produced by laser cutting.
• the sharply delimited edge surfaces of the second opening can run parallel and perpendicular to the paper surface.
• the second opening is formed with edge surfaces which are inclined relative to the surface normal. This can be achieved, for example, in laser cutting by a suitable choice of the beam divergence and the beam inclination relative to the paper surface.
• beam divergence and beam tilt to the paper surface can be adjusted so that the second opening is supported against the surface. chennormale differently inclined edge surfaces is generated.
• Flattened edges result in a smoother transition between a covering foil arranged over the openings and the paper substrate, and thus, inter alia, a lower susceptibility to soiling.
• differently inclined edge surfaces offer advantages when laminating the opening on both sides with foils and, in particular, minimize the problem of air entrapment which is possible in the case of mutual lamination.
• the openings with inclined edge surfaces with respect to vertical edge surfaces on an additional visual effect, since they appear different sizes depending on the viewing direction.
• the security paper has a predetermined paper thickness and a thin point with reduced paper thickness, wherein at least the second through opening is introduced in the region of the thin point.
• the thin spot may in particular comprise a watermark.
• the two openings are expediently closed on at least one side of the security paper with a film element.
• the openings are even closed on both sides with a foil. In this case, possible problems of air entrapment can be minimized by the above-mentioned inclined edges.
• a generic security paper contains at least one through opening, wherein the edge surface of the through opening has first, sharply delimited partial areas and second partial areas with characteristic irregularities.
• First and second portions preferably alternate with each other along the contour of the opening.
• first and second portions alternate with each other along the contour of the opening in an irregular sequence.
• first and second partial regions each extend through the entire paper thickness. It can also be provided that first and second subareas follow one another in a direction along the thickness of the security paper and supplement one another to the through opening. For example, in one edge portion, sharply defined portions may extend through 90% of the paper thickness while the edge surface is irregular for the remaining 10% of the paper thickness. Such edge portions may also be combined with other edge portions in which first or second portions extend completely through the entire paper thickness.
• Such a sequence of first and second subregions along the thickness of the security paper can be produced, for example, by producing a continuous opening with characteristic edge irregularities during papermaking, and modifying the edge region of the resulting opening after papermaking by cutting or punching and characterized sharply limited, at least in some areas.
• the modification is preferably produced by laser cutting, wherein here too the above-mentioned possibilities of inclination of the edge surfaces exist.
• the sequence of first and second portions along the thickness of the security paper may also be created by defining a piece of paper having the desired shape of the opening with broken, sharply defined cut lines in the security paper, and then ripping the piece of paper thus defined out of the security paper - sen, in particular blown out or pulled out.
• the piece of paper is preferably defined by laser cutting, in turn, there are the above-mentioned possibilities of inclination of the edge surfaces.
• a further possibility of generating the sequence of first and second partial areas is that a sharply delimited thin spot having the shape of the desired opening is produced in the security paper, and that the piece of paper formed in the region of the thin spot by the residual paper thickness is torn out of the security paper, especially blown out or pulled out.
• the sharply defined thin spot is produced in a preferred process control by laser cutting, if desired, with inclined edge surfaces, as explained above.
• the security paper has a predetermined paper thickness and a thin location with reduced paper thickness, for example a watermark, wherein the through opening is introduced in the region of the thin location.
• the through opening is suitably closed on one or even on both sides of the security paper with a film element.
• a generic security paper contains at least one through opening produced during papermaking, which has characteristic irregularities in the edge region.
• the through-hole is combined with an engraving created by laser etching, which complements the aperture to a projection image.
• the through opening is closed on one or even on both sides of the security paper with a film element.
• a generic security paper contains an embedded film element, which is visible in partial areas by papermaking-made window areas. The security paper has further in the region of the film element on an opening after Pandaher- position generated by cutting or punching with sharply defined edge region.
• the sharply defined opening is arranged above and / or directly next to the film element.
• the sharply defined opening is formed with the exception of a possible overlap region with the film element continuously.
• the window areas are arranged according to a preferred embodiment on a first main surface of the security paper, while the sharply defined opening extends from the opposite major surface of the security paper to the film element.
• the film element may be a security element, in particular a security thread or a security band.
• the sharply defined opening is advantageously produced by laser cutting.
• the edge surfaces of the opening may be inclined, as explained above.
• the security paper has a predetermined paper thickness and a thin layer with reduced paper thickness, for example a watermark, wherein the sharply defined opening is made in the area of the thin point.
• the well-defined opening is suitably closed on one or even on both sides of the security paper with a film element.
• the invention also includes a value document, such as a banknote, an identity card and the like, with a security paper of the type described.
• the security paper or document of value according to the invention can be used for the counterfeiting of goods of any kind.
• FIG. 1 is a schematic representation of a banknote from a security paper according to an embodiment of the invention DPg,
• Fig. 2 is a plan view of a security paper after another
• FIGS. 5 to 7 each show in (a) an intermediate step in the production of the security paper shown in plan view (b) according to another
• Fig. 8 in (a) an intermediate step in the manufacture of a security paper according to another embodiment of the Invention, and in (b) a section of (a) after the extraction of the cut-out shape,
• FIG. 9 is a plan view of a security paper according to another embodiment of the invention.
• FIG. 10 shows in (a) a plan view of a security paper with an embedded film element according to an embodiment of the invention, and in (b) and (c) cross sections through the security paper of (a) along the lines B-B and C-C, respectively;
• Fig. 13 shows a design in which a laser-cut opening in
• FIG. 15 shows in (a) to (c) a representation as in FIG. 14, wherein the laser-cut opening is produced in the region of a thin layer produced by paper-making
• FIG 16 m ( a ) and ⁇ i (J 0 ) show two exemplary embodiments of laser-cut openings with edge surfaces inclined towards the surface normal.
• FIG. 1 shows a schematic representation of a banknote 10 which has two through openings 12 and 16, respectively.
• the first of the through openings 12 was produced during the production of the security paper used for the banknote 10 and has a fibrous, irregular edge region 14.
• Such an edge 14 is characteristic of the openings already made in the sheet formation and can not be subsequently produced by punching or cutting the paper.
• the second through-opening 16 was produced only after the papermaking by laser cutting or mito e a punching tool and has a sharply defined edge portion 18.
• the two through openings 12 and 16 show, spatially separated, twice the same information, in the embodiment of FIG. 1 each an isosceles triangle. It is understood that complex shapes can be used instead of the triangle, whose outlines represent, for example, a number sequence or a simple graphic.
• the observer can establish the relationship of the two forms through the second opening 16 formed with clear contours and recognize the information without any doubt.
• the viewer's attention and attention are directed to the difference between the two openings.
• the high counterfeiting security of the irregularly bounded opening 12 is thus combined with the clear recognizability of the sharply edged opening 16.
• the section of FIG. 2 shows a plan view of a security paper 20 according to a further exemplary embodiment of the invention.
• the security paper 20 has a first paper-made opening 22 with an irregular edge area 24 and a second opening 26 produced by laser cutting with a sharp edge 28. Again, the outline shapes of the two openings 22 and 26 with each other in a sense context. In contrast to the embodiment of FIG. 1, however, they do not present the same information, but form complementary parts of a total information.
• the illustrated motif is adapted to the different edge properties of the two openings.
• Fig. 2 shows a flower motif in which the flower is formed by the first, irregularly bounded opening 22 and the stems and leaves by the second, sharply edged opening 26. Since flowers look very different and variable in nature, the overall picture looks very realistic. At the same time a high protection against counterfeiting is ensured by the use of the two opening forms.
• Figures 3 and 4 show further embodiments of designs in which the outline shapes of an irregularly bounded first opening and a sharply edged second opening are in a meaningful relationship.
• Fig. 3 (a) shows a sun in the form of a circular, irregularly-edged first opening 32 with radially outward pointing rays, which are formed by laser-cut or punched triangular openings 34.
• the rays formed by the second openings 34 represent a motif dependent on the first opening.
• the irregularly bordered, star-shaped, first opening 36 represents a main motif, of which the edges are sharply edged, circular , Second openings 38 depend graphically.
• FIG. 4 shows a further exemplary embodiment of the invention, in which the irregularly bounded openings 42 and the sharply edged openings 44 each supplement the denomination "100" of a banknote 40.
• the denomination of the banknote is again clear elsewhere
• only one of the designs of FIG. 4 can be used, or both and optionally further designs can be provided at different locations of the banknote.
• FIG. 5 (a) shows a plan view of a security paper 50, into which a first, irregularly bounded opening 52 was initially introduced in papermaking.
• the opening 52 is modified after papermaking by laser cutting with two sharply edged openings 54 whose positions are shown in dashed lines in Fig. 5 (a).
• an irregularly-edged opening 62 in the form of a given figure for example in the form of the four-ply figure shown in FIG. 6 (a) is produced in a security paper 60.
• the irregular edge region 64 of this figure is then partially recut with a laser. As illustrated in FIG. 6 (b), this results in a continuous opening 66, which on the one hand has partial regions 68 with an irregular edge and, on the other hand, partial regions 69 with a sharp edge.
• the ratio and the sequence of subregions 68, 69 can be chosen arbitrarily.
• FIG. 7 shows a further exemplary embodiment in which, as in the exemplary embodiment of FIG. 6, initially an irregularly bounded opening 72 is introduced into a security paper 70, as shown in FIG. 7 (a).
• the aperture 72 is completely re-cut with a laser (reference numeral 74), the size of the re-cut 74 being selected to be slightly smaller than the size of the aperture 72.
• a continuous opening 76 is formed, which has portions 78 with an irregular edge and portions 79 with a sharp edge in an irregular sequence, as shown in FIG. 7 (b).
• a sequence of regular and irregular marginal areas can also be achieved without the involvement of an opening already created in papermaking.
• the desired shape of a through opening 82 can be cut out of a security paper 80 by means of a laser in such a way that the cut lines 84 do not form a continuous cut curve, but rather through uncut cuts 86 are interrupted as shown in Fig. 8 (a).
• the sections 86 form holding webs, which initially prevent the release of the cut-out shape.
• the cut-out shape can then be blown out, for example with an air jet, or pulled out by means of a vacuum.
• the cut piece of paper in this procedure tears off irregularly on the holding webs 86, while the cut lines 84 form sharp edges.
• the edge region to the opening 82 thus has a Abf ol- ge irregular subregions 88 and sharply cut portions 89, the relative size and sequence can be chosen almost arbitrarily by the cutting guide during laser cutting.
• the security paper 90 has a through hole 92 having an irregular, fibrous edge formed during papermaking.
• the opening 92 is combined with engraving lines 94 created by laser etching.
• the engraving lines 94 are formed by locally thinned areas in the security paper 90, as described, for example, in the document WO 98/03348, the disclosure of which is incorporated into the present description to this extent. Location and arrangement of the engraving lines 94 are inventively chosen so that they complement the opening 92 to a projection view.
• the engraving lines 94 When viewed in incident light, the engraving lines 94 are virtually invisible, where the flat shape of the opening 92 determines the appearance. If, on the other hand, the security paper is viewed in transmitted light, the engraving lines 94 clearly emerge due to the smaller paper thickness and supplement the planar opening 92 into a three-dimensional projection. onsdarwolf. The combination of the irregular opening 92 with the engraving lines 94 thus leads to an optically conspicuous interplay between 2D and 3D representation.
• the security paper is provided with a film element, such as an embedded security thread or a film strip covered on one side.
• FIG. 10 shows a security paper 100 in which a film strip 102 is embedded.
• Fig. 10 (a) shows a plan view of the security paper
• Figs. 10 (b) and 10 (c) show cross sections through the security paper of Fig. 10 (a) taken along lines B-B and C-C, respectively.
• the foil strip 102 was coated over its entire surface with hot-sealing lacquer 107.
• 106 on the other hand, only traces 108 on the edge of the film have been provided with heat-sealing lacquer, so that the middle film region of the upper side 106 remains uncoated.
• a nonwoven fabric now forms on both sides of the film.
• a window 110 for example by means of electrotypes, is recessed on the lower side 104 of the foil strip in which the foil element becomes visible.
• the nonwoven fabric is fixed in the drying section down to the recessed window 110 on the underside 104, which is coated all over with heat-sealing lacquer 107.
• On the opposite front side 106 on the other hand, only the heat-sealing lacquer-covered edge regions 108 are fixed in the drying section.
• a mold 112 is cut out with a laser over the recessed window 110 of the opposite side 104, as best seen in the cross-sectional view of Fig. 10 (c).
• the laser parameters are chosen so that only the paper, but not the film strip 110 is cut. This can be achieved, for example, by performing the laser cutting with a laser wavelength for which the film strip 102 is transparent and non-absorbent.
• the cut-out mold 112 can then be removed with a suction device, since no connection of the cut piece of paper with the film has been achieved due to the lack of heat-sealing lacquer coating on the front side 106 and the non-stick film surface.
• FIG. 11 (a) shows a top view of a security paper 120
• Figs. 11 (b) and 11 (c) show cross-sections through the security paper of Fig. 11 (a) taken along lines BB and C-C, respectively the security paper 120 is embedded with a security thread 122, which is primarily visible in the papermaking window regions 124 of the paper back, as shown in FIG. 11 (b).
• a sharp-edged opening 126 is inserted into the paper substrate with a laser and extends over the security thread 122.
• the laser parameters are selected so that, although the paper substrate 120, but not the security thread 122 is cut by the laser.
• the security thread 122 is then recognizable from both sides, as shown in FIG. 11 (c).
• the laser-cut opening 128 is not passed over the security thread 122, but the security thread is framed by the opening 128. Except for this difference, the views of FIGS. 12 (a) to (c) correspond to those of FIGS. 11 (a) to (c).
• the surface of the security thread 122 can only be seen in the window areas 124.
• Such a configuration is particularly suitable when the laser radiation could damage or undesirably affect the film material of the security thread 122.
• the opening 128 in this configuration can not be perfectly centered on the security thread 122, as indicated by the register variations shown in Figs. 12 (a) and (c).
• FIG. 13 shows a design in which a sharply edged opening 132 in the region of a thin spot 134 of the security paper 130 is produced by means of a laser.
• the thin spot 134 can be produced, for example, by a suctioned short-forming layer (a paper layer produced by spraying the pulp onto a round screen) or by means of electrotypes. Since the paper thickness is reduced in the region of the thin spot 134, can be used in laser cutting with lower laser power. As a result, higher cutting speeds are achieved, so that more complex shapes can be realized.
• This modification can be combined with all embodiments in which a laser is used to inscribe a sharply edged opening in a paper substrate.
• a thin spot 142 of predetermined shape is produced in the paper substrate 140 by means of a laser.
• the paper material is vaporized, burned or otherwise removed.
• the peripheral surface 146 is sharply defined and smooth.
• the piece of paper 144 remaining after the laser treatment is then removed by blowing out or sucking it out. Since it is only a very thin paper layer, the piece of paper 144 tears at the edges and thereby creates an irregular portion 148 in the edge surface of the now continuous opening 145, as in the cross-sectional view of Fig. 14 (b) and Top view of Fig. 14 (c) shown.
• the sharply defined portion 146 and the characteristically irregular shaped portion 148 follow each other.
• the through opening 145 appears from opposite sides of the security paper with varying degrees of impression, depending on whether the sharp bounded edge area 146 or the irregular edge area 148 is adjacent to the paper surface.
• FIG. 15 As an exemplary combination of laser-generated openings with thin areas in the paper substrate (FIG. 13), the exemplary embodiment of FIG. 15 initially shows a paper thin layer 151, such as a watermark, produced in the security paper 150. In the area of this thin spot 151 is then, as in With reference to Fig. 14, the laser produces a second sharply-defined thin spot 152 which leaves only a small residual thickness 154 of the paper substrate, as shown in Fig. 15 (a).
• a paper thin layer 151 such as a watermark
• This remaining paper piece 154 is torn out by blowing or sucking, so that an irregular edge surface 158 is formed on the underside of the paper substrate 150, as shown in Fig. 15 (b).
• the edge region 156 produced by laser cutting is sharply delimited.
• the resulting through opening 160 is embedded in a watermark area 151, which clearly appears when viewed in phantom, see FIG. 15 (c). It is understood that the shape of the opening 160 and the watermark area 151 may also be correlated with each other.
• the edge surface of the opening 160 has, along a direction extending through the paper thickness, successively a sharply delimited subregion 156 and a characteristically irregularly shaped subregion 158. Again, the solid opening 160 will appear with different sensation when viewed from opposite sides of the security paper, depending on whether the sharply defined
• Edge region 156 or the irregular edge region 158 adjacent to the paper surface are adjacent to Edge region 156 or the irregular edge region 158 adjacent to the paper surface.
• the sharp-edged opening can be generated by a punching tool instead of a laser. Also, it is not necessary for the edge surfaces of the laser-cut apertures to be parallel and perpendicular to the paper surface, as shown in the figures for ease of illustration. Rather, it can be beneficial to skew the laser source and / or the paper as it cuts so that "flattened" edges are created.
• FIG. 16 shows in (a) and (b) two exemplary embodiments in which sharply bordered, laser-cut openings 172 and 174 are introduced into paper substrates 170.
• the slope of the marginal surfaces 178 of the apertures can be adjusted as desired by choosing an appropriate beam divergence and beam tilt.
• the openings 172 and 174 are each covered with a film 176.
• the flattened edges result in a smoother transition between the film 176 and the paper substrate 170.
• Such edge shapes significantly reduce the susceptibility of the openings to fouling.
• FIG. 16 (b) in which the edge surfaces have different inclinations, moreover has proved to be particularly advantageous in the case of a mutual lamination (not shown) of the openings with foils. Problems with the possible inclusion of air between the opposing films can be minimized by such an edge design.
• the openings of FIG. 16 also have, as a further advantage, an additional optical effect, since they appear differently sized depending on the viewing direction.

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Citations (6)

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• 2005
  • 2005-05-12 DE DE102005022018A patent/DE102005022018A1/de not_active Withdrawn
• 2006
  • 2006-05-03 CN CN2010101901473A patent/CN101892612A/zh active Pending
  • 2006-05-03 ES ES06724688T patent/ES2368498T3/es active Active
  • 2006-05-03 BR BRPI0612347-3A patent/BRPI0612347A2/pt not_active IP Right Cessation
  • 2006-05-03 AT AT06724688T patent/ATE520543T1/de active
  • 2006-05-03 RU RU2007144576/12A patent/RU2408466C2/ru not_active IP Right Cessation
  • 2006-05-03 EP EP06724688A patent/EP1904311B1/de not_active Not-in-force
  • 2006-05-03 WO PCT/EP2006/004113 patent/WO2006119896A2/de active Application Filing
  • 2006-05-03 EP EP09009275A patent/EP2143565B1/de not_active Not-in-force
  • 2006-05-03 CN CN2006800158004A patent/CN101171145B/zh not_active Expired - Fee Related
  • 2006-05-03 US US11/913,658 patent/US20080216976A1/en not_active Abandoned

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