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US 8,955,434 B2Granted
Apparatus for digital flexographic printing
AssigneeXerox Corporation
InventorsMandakini Kanungo, Kock-Yee Law, George Cunha Cardoso, Jing Zhou
Life of this patent
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Abstract
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.
Claims18
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;
- and
- a 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;
- and
- a 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.
11 more elements
A flexographic printing system comprising:
- a nano-enabled imaging member comprising:
- a substrate;
- an array of hole-injecting pixels, each pixel being electrically isolated and individually addressable, and each pixel being formed from a nano-carbon material or a conjugated polymer;
- and
- a 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;
- and
- a 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 is about 1 μm to 50 μm wide;
- 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.
12 more elements
Dependencies are inferred from the claim text.