Apparatus for digital flexographic printing

摘要

A digital flexography system includes an imaging member with a charge generating layer formed from an array of addressable pixels and a charge transport layer thereon. Ink is delivered to the imaging member using a simple rough donor roll, rather than an anilox roll. Instead of controlling the amount of ink delivered using the anilox roll, the amount of ink is controlled by the pixels on the imaging member.

主权项

1. A flexographic printing system comprising:
a nano-enabled imaging member comprising:
an array of hole-injecting pixels, each pixel being electrically isolated and individually addressable; anda charge transport layer disposed over the array of hole-injecting pixels; a development subsystem comprising:
a rough ink donor roll having a surface roughness;an ink supply; anda doctor blade for metering ink; and an ultra-violet curing source located downstream of the development subsystem for partial curing of a developed image on the imaging member; wherein a gap between the nano-enabled imaging member and the rough ink donor roll has a distance of from about 1 μm to 50 μm; and wherein the surface roughness of the rough ink donor roll is less than the gap between the nano-enabled imaging member and the rough ink donor roll.