Printing press and method for producing security products or security intermediate products

Patent metadata

Field	Value
Publication number	US-11390064-B2
Application number	US-201917294704-A
Country	US
Kind code	B2
Filing date	Nov 27, 2019
Priority date	Dec 4, 2018
Publication date	Jul 19, 2022
Grant date	Jul 19, 2022

Abstract

A printing press and a method for producing security products or security intermediate products comprises a feed device for feeding unprinted printing substrate into the printing press. Multiple printing couples print the unprinted printing substrate in an indirect planographic or in a letterpress printing method in one or more printing nips. In a conveyor line, between the feed device and the first printing nip located in the printing substrate path, at least one inspection device, which is embodied as a transmissive inspection device, is provided for inspecting the as yet unprinted printing substrate.

First claim

The invention claimed is:

1. A printing press for producing ones of security products and security intermediate products, comprising:
a feed device for feeding as yet unprinted printing substrate along a printing substrate path into the printing press;
a plurality of printing couples in the printing substrate path by which plurality of printing couples the unprinted printing substrate can be printed on both sides in a multicolor process in one of an indirect planographic printing method and an indirect letterpress printing method in at least one printing nip;
wherein, in a conveyor line between the feed device and a first printing nip in the printing substrate path, a reflective inspection device having a first camera is provided on a transport path of a transport cylinder in the conveyor line between the feed device and the first printing nip, which reflective inspection device uses UV radiation for inspecting the as yet unprinted printing substrate for security features contained one of in and on the printing substrate;
wherein, in the conveyor line between the feed device and the first printing nip in the printing substrate path, a transmissive inspection device is additionally provided; and
wherein the transmissive inspection device comprises an IR-sensitive camera as a second camera and is provided on the transport path of the transport cylinder, a circumferential surface of which transport cylinder is at least partially transparent in at least a wavelength range that is relevant for an inspection of the as yet unprinted printing substrate by the transmissive inspection device.

2. The printing press according to claim 1 , one of wherein the reflective inspection device comprises an illumination means and the first camera and wherein the reflective inspection device comprises an illumination device that emits light with one of a radiation maximum lying in the UV wavelength range and with a spectral half-width of no more than 150 nm based on radiant power, and comprises a UV sensitive camera.

3. The printing press according to claim 2 , one of wherein the illumination means and the first camera are arranged such that a camera lens of the first camera is directed toward a central axis of the transport cylinder and wherein, to form an inspection lined, the illumination means irradiates the transport cylinder from outside of the transport cylinder at an angle that deviates no more than 30° from a radial direction of the transport cylinder at a location of the inspection lined.

4. The printing press according to claim 2 , wherein an illumination device of the transmissive inspection device is arranged in the transport cylinder in one of such a way that it irradiates the at least partially transparent transport cylinder from inside of the at least partially transparent transport cylinder along an inspection line that extends axially on a cylinder shell of the transport cylinder, which inspection line intersects a connecting line that extends radially between a center of a lens of the second camera and a cylinder axis of the cylinder shell, and in such a way that the illumination device lies on the connecting line between the center of a camera lens of the second camera and the cylinder axis.

5. The printing press according to claim 1 , wherein an illumination device, of the transmissive inspection device is arranged inside the transport cylinder, and the second camera, is arranged outside of the transport cylinder and is directed toward a surface of the transport cylinder.

6. The printing press according to claim 1 , wherein the transmissive inspection device comprises an illumination device that emits light one of with a maximum radiation lying in the IR wavelength range and with a spectral half-width of no more than 150 nm based on radiant power.

7. The printing press according to claim 1 , wherein the transport path extends one of vertically through the at least one printing nip and between two printing nips.

8. The printing press according to claim 1 , one of wherein, in the printing substrate path, the at least one printing nip is provided, which at least one printing nip has a printing couple embodied as a collect printing couple on one of at least one side of the printing substrate path and on both sides of the printing substrate path, and wherein, in the printing substrate path downstream of the transmissive inspection device, two printing nips configured as blanket-to-blanket printing nips are provided, spaced apart in relation to one another, each of which is formed by two printing couples, configured as collect printing couples, provided on the two sides of the printing substrate path.

9. The printing press according to claim 1 , wherein one of the reflective inspection device and the transmissive inspection device is configured to inspect the as yet unprinted printing substrate over one of at least 80% of a width of the unprinted printed substrate running transversely to the direction of transport and over at least a printing width of the printing nip that follows downstream.

10. A method for producing ones of security products and security intermediate products, including;
feeding an as yet unprinted printing substrate into an input side of a security printing press;
printing the printing substrate on one of one and both sides of the printing substrate in one of an indirect planographic printing and a letterpress printing method in a printing nip lying in a printing substrate path;
inspecting the as yet unprinted printing substrate, before it reaches the printing nip by using a reflective inspection device having a first camera and using UV radiation for security features contained one of in and on the printing substrate;
locating the reflective inspection device on a transport path of a transport cylinder in the printing substrate path before the printing substrate reaches the printing nip; and
additionally inspecting the as yet unprinted printing substrate, before the as yet unprinted printing substrate reaches the printing nip in a transmitted light method using at least one inspection device, embodied as a transmissive inspection device, having an IR sensitive camera provided as a second camera, and located on the transport path of the transport cylinder, for security features that are already contained in the as yet unprinted printing substrate.

11. The method according to claim 10 , further including printing the printing substrate downstream of the transmissive inspection device in at least one printing nip one of on both sides simultaneously and with print images from multiple forme cylinders simultaneously according to a collect printing method.

12. The method according to claim 10 , further including one of that, in the transmitted light method, a security thread embedded in the yet to be printed printing substrate is inspected, wherein one of a check for the presence and absence of a security thread is carried out and a check for continuity, such as one of an absence and an interruption, of the security threads in the printing substrate and a check for variations in a thickness of the security thread and a lateral migration of the security thread beyond a specified limit and an examination of a microtext contained one of in and on the security thread is carried out, and in that, in an incident light method, a check for one of the presence and absence of UV fluorescence in the security thread and a check for one of the presence and absence of a watermark and a check for one of the presence and absence of embedded security fibers and a UV fluorescence in the embedded security fibers is carried out.

13. The method according to claim 12 , further in

Assignees

• Koenig & Bauer Ag

Inventors

• Bauer Stefan
• Kersten Thomas
• Kress Patrick
• Schaede Johannes
• Schwitzky Volkmar
• Türke Thomas
• Ziegler Daniel

Classifications

• B41M3/14

  Security printing {(securities B42D25/29)} · CPC title

• B41F11/02 Primary

  for securities (security printing B41M3/14) · CPC title

• B41F33/00 Primary

  Indicating, counting, warning, control or safety devices (arrangements of counting devices in platen presses B41F1/00 {, B41F1/58; arrangements of counting devices} in cylinder presses B41F3/84; ink supply or metering devices B41F31/02) · CPC title