Abstract:
There is described an intaglio printing plate coating apparatus (1) comprising a vacuum chamber (3) having an inner space (30) adapted to receive at least one intaglio printing plate (10) to be coated, a vacuum system (4) coupled to the vacuum chamber (3) adapted to create vacuum in the inner space (30) of the vacuum chamber (3), and a physical vapour deposition (PVD) system (5) adapted to perform deposition of wear-resistant coating material under vacuum onto an engraved surface (10a) of the intaglio printing plate (10), which physical vapour deposition system (5) includes at least one coating material target (51, 52) comprising a source of the wear-resistant coating material to be deposited onto the engraved surface (10a) of the intaglio printing plate (10). The vacuum chamber (3) is arranged so that the intaglio printing plate (10) to be coated sits substantially vertically in the inner space (30) of the vacuum chamber (3) with its engraved surface (10a) facing the at least one coating material target (51, 52). The intaglio printing plate coating apparatus (1) further comprises a movable carrier (6) located within the inner space (30) of the vacuum chamber (3) and adapted to support and cyclically move the intaglio printing plate (10) in front of and past the at least one coating material target (51, 52).
Abstract:
There is described a substrate (S) for security documents, such as banknotes, comprising one or more paper layers (11, 12) and a polymer layer (20) which is made to adhere to a side of at least one of the paper layers (11, 12), which polymer layer (20) is substantially transparent in at least one region of the substrate (S) which is not covered by the paper layer or layers (11, 12) so as to form a substantially transparent window (W) in the substrate (S) which is formed and closed by the polymer layer (20). The polymer layer (20) exhibits in the region of the window (W) a thickness (T) which is greater than a thickness (t) of the polymer layer (20) outside of the region of the window (W). The thickness (T) of the polymer layer (20) in the region of the window (W) is substantially equal to the added thickness of the paper layer or layers (11, 12) and of the polymer layer (20) outside of the region of the window (W) so that the substrate (S) exhibits a substantially uniform and constant thickness (T). The substrate (S) further comprises a micro-optical structure (30), in particular a lens structure, which is disposed in the region of the window (W) on at least one side of the polymer layer (20).
Abstract:
There is described a multicolour letterpress printing press, in particular a numbering press, comprising a printing group (50) with at least a first letterpress (e.g. numbering) cylinder (51) and a second letterpress cylinder (52) which are inked by an associated inking system (60, 71, 72, 81, 81a, 81b, 82, 82a, 82b). The inking system (60, 71, 72, 81, 81a, 81b, 82, 82a, 82b) comprises (i) a first inking device (81) supplying ink to a first chablon cylinder (71), (ii) at least a second inking device (82) supplying ink to a second chablon cylinder (72), and (iii) an ink-collecting cylinder (60) contacting the first and second chablon cylinders (71, 72) and the first and second letterpress cylinders (51, 52). The ink-collecting cylinder (60) collects a first ink pattern (A, D) from the first chablon cylinder (71) and a second ink pattern (B, C) from the second chablon cylinder (72). As a result, a first multicolour pattern of inks (A-D) is formed on the ink-collecting cylinder (60), which first multicolour pattern of inks (A-D) is transferred onto the first letterpress cylinder (51). The ink-collecting cylinder (60) further collects a third ink pattern (A, D) from the first chablon cylinder (71) and a fourth ink pattern (B, C) from the second chablon cylinder (72), thereby forming a second multicolour pattern of inks (A ″D) on the ink-collecting cylinder (60), which second multicolour pattern of inks (A ″D) is transferred onto the second letterpress cylinder (52).
Abstract:
There is described a method of creating a transparent polymer window (W) with a field of lenses (L) in a security paper substrate (1), the method comprising the steps of (i) providing a security paper substrate (1), (ii) forming an opening (10) into the security paper substrate (1), (iii) laminating a transparent film (5; 5*) onto a first side (I) of the security paper substrate (1) in such a way as to close the opening (10) at one end, and (iv) filling the opening (10) with transparent polymer material (2). In one embodiment, the transparent film (5) comprises a field of lenses (L) and is laminated onto the first side (I) of the security paper substrate (1) in such a way as to form lenses (L) on the first side (I) of the security paper substrate (1) in register with the opening (10). In another embodiment, the field of lenses (L) is replicated into the transparent polymer material (2) applied in the opening (10) in such a way as to form lenses (L) on a second side (II) of the security paper substrate (1), opposite to the first side (I), in register with the opening (10). Also described is a device designed to fill the opening (10) formed into the security paper substrate (1) with the transparent polymer material (2) and a processing machine comprising the same.
Abstract:
There is described an inspection system (10) for inspecting the quality of printed sheets which are transported by a sheet conveyor system comprising at least one sheet gripper system (3a, 3b) including a plurality of spaced-apart gripper bars (32) for holding the printed sheets by a leading edge thereof. The inspection system (10) comprises an optical quality control apparatus for carrying out inspection of a first side of the printed sheets while the printed sheets are being transported by the sheet gripper system (3b). The optical quality control apparatus includes a line camera (11) for scanning the first side of the printed sheets at an inspection location which is situated at a location proximate to a portion of the sheet gripper system (3b) where the gripper bars (32) transporting the printed sheets undergo a change of direction of displacement while the printed sheets are still being scanned by the line camera (11). The inspection system (10) further comprises a suction roller (50) that is placed in front of the optical path (B) of the line camera (11) along the path (A) of the printed sheets being transported by the sheet gripper system (3b), which suction roller (50) contacts a second side of the printed sheets opposite to the first side which is being scanned by the line camera (11), the suction roller (50) being driven at a selected circumferential speed to drive successive portions of the printed sheets being inspected by the quality control apparatus at a determined and controlled speed past the line camera (11).
Abstract:
There is described a sheet-fed or web-fed printing press for numbering and varnishing of security documents, including banknotes, comprising: —a numbering group (02) comprising at least one numbering unit (21, 22) for numbering printed material in the form of individual sheets or successive portions of a continuous web carrying multiple security imprints; and —a varnishing group (03; 03*) located downstream of the numbering group (02) for applying varnish onto recto and verso sides of the printed material, the varnishing group (03; 03*) comprising at least a first varnishing unit (31) disposed above a path of the printed material to apply varnish on the recto side of the printed material and at least a second varnishing unit (32) disposed below the path of the printed material to apply varnish on the verso side of the printed material.
Abstract:
Intaglio printing press systems for recto-verso intaglio printing of sheets, in particular for the production of banknotes and the like securities, wherein first and second intaglio printing presses are operatively-coupled to one another by a sheet processing and transporting system comprising an automated guided vehicle system for automatically transporting sheets from a sheet delivery station of the first intaglio printing press where recto printing is performed to a sheet feeding station of the second intaglio printing press where verso printing is performed.
Abstract:
There is described a printed security feature (10) provided onto a printable substrate, which printed security feature includes a printed area (11) with at least a first printed section consisting of a multiplicity of geometric elements (GE, 15) printed with a given distribution over the printed area. The geometric elements are printed with at least first and second inks which exhibit the same or substantially the same optical appearance when illuminated with visible white light, such that the printed security feature produces a first graphical representation (A1) when illuminated with visible white light. At least the first ink is an ink which responds to non-visible light excitation by producing a characteristic optical response differentiating the first ink from the second ink. The printed security feature produces a second graphical representation (B1) when illuminated with non-visible light, which exhibits a distinctive two-dimensional graphic element (B) which is revealed only when the printed security feature is illuminated with non-visible light. The first printed section is subdivided into at least first and second printed portions (P1, P2), adjacent to the distinctive two-dimensional graphic element, and a third printed portion (P3), inside boundaries (200) of the distinctive two-dimensional graphic element. In the first, respectively second printed portion, the geometric elements are printed with the first, respectively second ink. In the third printed portion, the geometric elements are sub-divided into first and second contiguous portions (GE_a, GE_b) which are respectively printed with the first and second inks. The first and second inks are printed in register one with respect to the other so that the boundaries of the distinctive two-dimensional graphic element are not visible when the printed security feature is illuminated with visible white light and the distinctive two-dimensional graphic element only becomes visible when the printed security feature is illuminated with non-visible light.
Abstract:
There is described a sheet-fed rotary printing press (100; 200; 300) for the production of banknotes and like securities comprising at least one printing form cylinder (115, 125; 215; 315, 325) having one or more segments. A nominal diameter (D) of the at least one printing form cylinder (115, 125; 215; 315, 325) substantially corresponds to an integer multiple of a reference diameter of a one-segment cylinder (103a; 103c; . . . ) as used for printing onto super-format sheets exhibiting a standardized format with a width of the order of 820 mm and a length of the order of 700 mm. An axial length (AL) of the at least one printing form cylinder (115, 125; 215; 315, 325) is comparatively greater than a nominal axial length of a corresponding printing form cylinder as used for printing onto super-format sheets, by an amount such that the at least one printing form cylinder (115, 125; 215; 315, 325) is suitable for printing onto large-format sheets having a comparatively greater width (W) than the width of super-format sheets. Preferably, a circumferential length (SL) of each segment of the at least one printing form cylinder (115, 125; 215; 315, 325) is comparatively greater than a nominal circumferential length of each segment of a corresponding printing form cylinder as used for printing onto super-format sheets, by an amount such that the at least one printing form cylinder (115, 125; 215; 315, 325) is suitable for printing onto large-format sheets having a comparatively greater length (L) than the length of super-format sheets.
Abstract:
There is described an intaglio printing plate coating apparatus (1) comprising a vacuum chamber (3) having an inner space (30) adapted to receive at least one intaglio printing plate (10) to be coated, a vacuum system (4) coupled to the vacuum chamber (3) adapted to create vacuum in the inner space (30) of the vacuum chamber (3), and a physical vapour deposition (PVD) system (5) adapted to perform deposition of wear-resistant coating material under vacuum onto an engraved surface (10a) of the intaglio printing plate (10), which physical vapour deposition system (5) includes at least one coating material target (51, 52) comprising a source of the wear-resistant coating material to be deposited onto the 32 engraved surface (10a) of the intaglio printing plate (10). The vacuum chamber (3) is arranged so that the intaglio printing plate (10) to be coated sits substantially vertically in the inner space (30) of the vacuum chamber (3) with its engraved surface (10a) facing the at least one coating material target (51, 52). The intaglio printing plate coating apparatus (1) further comprises a movable carrier (6) located within the inner space (30) of the vacuum chamber (3) and adapted to support and cyclically move the intaglio printing plate (10) in front of and past the at least one coating material target (51, 52).