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Printing machine with laser perforating unit, laser perforation system and manufacture method of perforation pattern

A technology of laser perforation and manufacturing method, applied in the directions of printing, printed matter, manufacturing tools, etc., can solve the problem of inability to accurately form perforation patterns, etc.

Inactive Publication Date: 2009-09-16
KBA NOTASYS SA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, with the exception of the jaws of the sheet, the vast majority of the sheet is not supported or held in place as such, so that the perforation pattern cannot be formed with sufficient accuracy.

Method used

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  • Printing machine with laser perforating unit, laser perforation system and manufacture method of perforation pattern
  • Printing machine with laser perforating unit, laser perforation system and manufacture method of perforation pattern
  • Printing machine with laser perforating unit, laser perforation system and manufacture method of perforation pattern

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Embodiment Construction

[0026] The invention will be described within the context of a specific embodiment, namely an intaglio printing machine equipped with a laser perforation system. It should be understood, however, that this embodiment should not be considered limiting and that the disclosed laser perforation system may be applied to other types of printing or processing machines.

[0027] Furthermore, within the scope of the present invention, "laser perforation" is to be understood as meaning that the sheet is irradiated with a laser beam, wherein at least part of the sheet material is ablated by the laser beam, thereby producing depressions or perforations in the thickness of the sheet. In other words, the "perforation pattern" obtained by "laser perforation" can be as in US Patent 5,975,583 figure 2 The pattern shown, where the perforations pass through the entire thickness of the sheet; image 3 The pattern shown, where only part of the material of the sheet is ablated; or a combination o...

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Abstract

A laser perforating system for applying at least one perforation pattern of micro-perforations onto printed sheets, in particular sheets for the production of securities, banknotes, passports, ID cards and other valuable documents, comprising: - a sheet transport system (11) for transporting the printed sheets along a transporting path; - a laser perforating unit (18) with at least one laser head (180) disposed along the transporting path of the sheet transport system (11) for perforating said printed sheets and carrying out the micro-perforations; and - a first aspiration unit (19) to maintain the printed sheets against an aspiration surface during perforation by said laser perforating unit (18), wherein said aspiration unit (19) is disposed between said laser perforation unit (18) and said transporting path of the sheet transport system (11), said aspiration unit (19) comprising at least one opening (190) in said aspiration surface (19a) through which is directed said at least one laser head (180).

Description

technical field [0001] The invention relates to a printing machine equipped with a laser perforation unit for printing on printed sheets, in particular for the manufacture of securities, banknotes, passports, ID cards and other documents of value At least one perforation pattern is formed in the sheet. [0002] The invention also relates to a laser perforation system and a production method for forming at least one perforation pattern on a printed sheet. Background technique [0003] Laser perforation of value-representing carriers is known per se in the prior art. For example, US 5,975,583, the content of which is incorporated by reference in this application, discloses a carrier representing value and comprising a perforated pattern formed by a laser beam, said pattern being at least partially recognizable by the human eye and having a structure , that is, they cannot be formed on the support by other means or are extremely difficult to form. Such value-representing car...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B42D15/00G06K1/12B23K26/10B42D15/10
CPCB42D25/346B42D15/00
Inventor 约翰内斯·G·舍德约翰·E·艾特尔
Owner KBA NOTASYS SA
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