MULTI-LAYER TAPE FOR COATING INTAGLIO DEPRESSIONS A METHOD OF EMBOSSING A PRINTING PLATE USING SUCH A TAPE AND A PRINTING PLATE MADE BY THE METHOD

摘要

1325373 Embossing ADDRESSOGRAPH MULTIGRAPH CORP 1 Oct 1970 [2 Oct 1969] 46737/70 Heading B6J [Also in Divisions C3 and D2] In the process of forming intaglio depressions in a printing plate 16, a multi-layer tape 13 comprising a polymeric carrier layer having a tensile strength of at least 10,000 p.s.i., an intermediate layer of polyethylene or polypropylene having a tensile strength less than 10,000 p.s.i. and a fragmentable polymeric top layer containing a pigment, is interposed between the punch 14 and the plate 16 so that when the punch 14 and die 15 are brought together, part of the pigment-containing layer is transferred into the depression formed in the printing plate, thus enabling the printing plate to be read more easily when viewed from above.