Title: Special intaglio printing process for preventing forgery of securities

Abstract: An intaglio printing process utilizing a printing plate consisting of a precise engraving element which is adapted from a gravure printing plate. This printing plate is applied on the plate cylinder and printed with very stiff and viscous ink as used for engraving intaglio printing. Ink of various colors may be applied separately on different portions of the gravure plate surface by rollers. After inking, surplus ink can be wiped of by a wiping roller. Printing paper is introduced between the plate cylinder and impression cylinder for printing. off

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Inventors: Ichikawa, Ieyasu (Tokyo, JA)

Application Number: 378174
Filing Date: 1973-07-11
Publication_date: 1976-09-14
Assignee: Director General, Printing Bureau, Ministry of Finance (Tokyo, JA)
Primary Class(es): 101/170 101/395, 101/401.1, 283/57, 283/58, 283/59
Other Classes:
US Patent Ref:

923799	Jun, 1909	Saalburg	101/170.
2029103	Jan, 1936	Howey	101/401.
2063614	Dec, 1936	McFarland	101/401.
2659305	Nov, 1953	Giori	101/155.
3093071	Jun, 1963	Taylor	101/170.
3304861	Feb, 1967	Magid	101/152.
3390631	Jul, 1968	Koszuc	101/170.

Other Refs: 641,5431,230,4371,806,263987,102

May, 1962	CA
Dec, 1966	DT
Jun, 1969	CH
Jul, 1961	UK

Primary Examiner: Fisher, J. Reed
Assistant Examiner:
Attorney: Larson, Taylor and Hinds