US 12,358,317 B2
Process for preparing polymeric security articles
Michael Blesovsky, Burford (GB); Johannes Schaede, Würzburg (DE); and Robert Stewart, La Tour de Peilz (CH)
Assigned to Koenig & Bauer Banknote Solutions SA, Lausanne (CH)
Appl. No. 17/426,928
Filed by Koenig & Bauer Banknote Solutions SA, Lausanne (CH)
PCT Filed Jan. 30, 2019, PCT No. PCT/EP2019/052246
§ 371(c)(1), (2) Date Jul. 29, 2021,
PCT Pub. No. WO2020/156658, PCT Pub. Date Aug. 6, 2020.
Prior Publication US 2022/0097440 A1, Mar. 31, 2022
Int. Cl. B42D 25/29 (2014.01); B42D 25/378 (2014.01); B42D 25/40 (2014.01); B42D 25/415 (2014.01)
CPC B42D 25/415 (2014.10) [B42D 25/378 (2014.10)] 16 Claims
OG exemplary drawing
 
1. A method of manufacturing a banknote, said method comprising the steps of:
a. introducing into an offset printing device a transparent film comprising a non-fibrous substrate layer of regenerated cellulose, wherein the transparent film is devoid of watermarks or other security features and wherein the regenerated cellulose is not regenerated cellulose which has been chemically modified;
b. disposing printed information on at least a portion of said transparent film by an offset printing step, and
c. after step (b), disposing one or more security feature(s) on one or both surfaces of the transparent film, wherein the one or more security feature(s) comprise at least one of a printed signature or serial number, optical security feature(s), and printed features comprising optically variable ink, magnetic ink and/or fluorescent ink;
wherein said transparent film introduced into said offset printing device further comprises an ink-receptive layer on at least one surface of said substrate layer and wherein said transparent film is devoid of light-sensitive additives; and
wherein an opacification layer is absent from the banknote.