Pin register system for flexographic printing plates

Details Pin register system for flexographic printing plates Pin register system for flexographic printing plates

B - Operations, Transporting

41

L

101/117

B41L 29/00 (2006.01)

Patent

CA 1243896

PIN REGISTER SYSTEM FOR FLEXOGRAPHIC PRINTING PLATES Abstract A method for accurately positioning photopolymer color plates onto print cylinders of a rotary press is disclosed. Alignment accuracy is provided by producing multiple color separated film negatives from a camera film negative on which an image field and reference marks have been photographically transferred from mechanical artwork. Continuity of alignment accuracy is provided by center scribe reference marks utilized together with index holes which are precision located and punched, respectively, onto and through carrier sheets, masks, duplicating film and color separated negatives. Various combinations of pre-punched carrier sheets, masks, contact duplicating film, color separated negatives, and unexposed printing plates are mechanically coupled in precise alignment by pin register tabs throughout the various stages of the plate production process. Finished photopolymer plates are mounted onto assigned print cylinders with the aid of index pins.

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