Preliminary wiping device for engraving intaglio printing has two interacting rolls below doctor, rotating in trap tank

摘要

The preliminary wiping device has two interacting rolls (05, 06) below the lower end of the doctor (04), rotating in a trap tank (07) in bearings. Both rolls are variable in diameter over their entire length. The diameter of the first roll decreases from one end to the roll center and then increases again towards the other end. The diameter of the other roll increases from one end to the roll center and then decreases again towards the other end.