Patent ID: 8187406

Claim:
A method of producing high security film for incorporating into a security paper such as currency note paper or the like; the method comprising the following steps: (i) loading a roll of a donor web on an unwinder of a multipass print-coat machine, unwinding and passing the donor web through a set of guide and tension control rolls into a printing zone; (ii) printing desired indicia on the donor web by passing the donor web through one or more print station(s) containing a solution of adhesive and one or more security element(s); (iii) drying the donor web with adhesive printed indicia containing security elements by passing the donor web through one or more set of driers for evaporating the solvent contained in the adhesive, leaving a desired selective indicia pattern; (iv) laminating the donor web containing said adhesive printed selective indicia pattern along with one or more security element(s), with a receiver web by passing the donor web and receiver web through nip/press rolls; (v) rewinding the laminated donor web and receiver web from step (iv) on a rewinder; aging the laminated donor web and receive web by stacking the roll on a stacker for a desired aging period and then splitting/separating out the laminated donor web and receiver web on two different shafts; and (vi) splitting/separating out the donor web and receiver web, on two different shafts to transfer the adhesive printed selective indicia pattern to the receiver web forming security film.