DE7305901U - Bound or stapled printed matter such as a book or magazine or the like - Google Patents

Description

Bound or stapled printing unit
like book or magazine

There are a number of cases in which writings, representations of a scientific or technical nature, such as drawings, plans, maps, sketches, tables or other
Printed works are to be excluded from reproduction, for example in order to prevent misuse or to prevent a violation of the prohibition of reproduction according to the copyright law from the outset. Furthermore, there are cases in which confidential information has to be transmitted without the access to the information carrier being prevented for undesired persons. The confidential information
must therefore be applied to the carrier that they
are not recognizable under normal conditions, for example in white light. As usual, the spectrum is under white light
of visible light. The information can either be alone or in connection with other information that can be read normally under white light on the carrier

7305901 3O.0A.75

- 2 -: here every I. one up are located. Under information should be , the Art unarmed printing on carrier material to the

It is known to use different substrates with printing ink to which a fluorescent substance is mixed. Only through exposure to excitation radiation, such as UV radiation, the printing ink unfolds its fluorescent effect by emitting fluorescence or · So-called secondary rays. In some cases it will also exploited the afterglow effect of the fluorescent substance.

ΊΓβ Λ «+ · Ροτ · ηοτ · haV onn -t. m-ΐ + TU 1 fe ir / vn fliinreeR ¹ ! oraTiHow Q »»> »_

punch an almost invisible coding of signal carriers to undertake. This is used, for example, in the postal system when distributing letters used. The zip code is applied to the envelope in a fluorescent code, so that an automated Distribution of letters can be carried out according to the postal code, the coding being carried out on the Receivers sensitized to fluorescence radiation are read.

The task of the innovation is to create a printing unit which contains information that is invisible in white light and which meets the requirements mentioned at the beginning.

This task is solved by the innovation.

With the help of the innovation, for example, a Bcgen Paper with letters, characters or graphics

7305901 30.IU. 75

* 'ill. ffJ

that are not visible in normal lighting. Only through irradiation with a so-called excitation

Effect of the fluorescent added to the printing material Substance so that what is printed on it can be seen. The sheet printed in this way can be used, for example, for mediation serve confidential information. Furthermore, it cannot be reproduced using conventional copying processes. With help the method according to the invention can also be paper, cardboard or the like, which is already provided with normally visible printing, with additional letters, characters or other graphic representations that

Become visible to the viewer.

The print material can be in liquid or paste ■ State, being any suitable material

: can be used. It is particularly advantageous according to

] the innovation, if the invisible print material has a water-

free substance is responsible for changing the consistency of

j Printing inks are used. With different printing processes

j is desired to affect the consistency of printing inks

to be able to what normally anhydrous invisible sub-

: punches are used that do not change the color.

The innovation can be applied in a wide variety of areas,

• such as letterpress, e.g. for letterpress, flexographic printing, etc., flat printing,

e.g. offset, stone printing, collotype printing, etc., gravure printing, e.g.

7305901 04/30/75

Etc. So let rotogravure, steel table, etching, photogravure, squeegee pressure or Durchdruok, bB bB screen printing SLCN DruBk ^ produce ranhiken, give yourself recognize your au spectator only when irradiated with UV illumination d ± s. Furthermore, only signatures or additional characters can be printed on original print graphics old with the aid of the method according to the innovation.

The drawing shows a top view of a cardboard menu 10, which is printed in the usual form, indicated by dashed lines 11. A dashed box 12 at the lower edge of the menu 10 identifies an area that has a white light Contains illegible imprint. The Ώ «* τ imprint consists of a colorless, water-free printing material containing a fluorescent substance

7305901 04/30/75

is mixed in. The fluorescent substance makes it possible to see what is printed on when exposed to radiation AiirsgiingSStfiiHlime. ZeBe XJV light.

With the help of the innovation can one on a carrier material The imprint located not only cannot be deciphered or readable for the viewer, but also completely stay invisible. The reader of a document bearing such an imprint is able to do so with usual, normal lighting not to decide whether the document contains further illegible information or not, even if he might suspect this.

7305901 3O.ot.75

Claims (1)

PATBNTANWiLTB · ■, ing. H. NE GENDANK <· ΐ973) · dipl-ing. H. HAUipK : dipl.Iph ^ s. DIPL.-ING. E. GRAALFS · dipl.-ing. W. ' WEHNERT HAMBURG-MUNICH · SCHMITZ DELIVERY ADDRESS; HAMBUHG 86 NEW WALL TEL ·., 8β? * 28 -DITD 86 41 tblegb. negedapatbnt hambubq Munich i «- mozartstr. 23 TEL ·, β SS OO 8β Anvaltsakte 25 827-T9 ^ΙΪΙΕβΗ - »wbdapaimi m« schi » G 73 05 · »901» 5 Rolf Baumgarten Hamburg. January 9, 1975 New claim. / Bound or stapled printed matter such as a book or booklet or the like ^ identified by a at least partial printing with colorless printing material, to which a fluorescent substance is mixed. 7305901 30.0t 7S