Molded textured imaging blanket surface
View Patent ↗Forming an imaging blanket for a printing apparatus includes depositing a patternable material over a substrate, etching the patternable material according to a desired exposure pattern, hardening the etched patternable material to thereby form a template surface comprising a desired template pattern of texture features, depositing a layer of curable liquid polymer over and in physical contact with the template surface, curing the liquid polymer to thereby form the imaging blanket, and removing the imaging blanket from the template surface to thereby expose a patterned imaging surface of the imaging blanket. The image blanket may thereby be provided with a desired texture surface, for example comprised of individual molded image blanket features, such as recesses or pillars, of a desired cross-sectional shape. The image blanket is configured for and may be disposed on an image forming member of a variable data lithography system.
1. An imaging blanket for use in a variable data lithography system, comprising:
a polymer body structure having an imaging surface, wherein said polymer body structure comprised of material selected from the group consisting of fluorosilicone, fluorocarbon-based synthetic rubber, and silicone; and
formed in said imaging surface a repeating pattern of molded image blanket features, each said feature having a selected cross sectional shape, said pattern of molded image blanket features configured in an image-independent pattern, said molded image blanket features being formed as pillars in said imaging surface.
2. The imaging blanket of claim 1 , wherein said image blanket features have a substantially similar cross-sectional shape selected from the group consisting of: squares, octagons, circles, and hexagons.
3. The imaging blanket of claim 1 , wherein said pillars are substantially 0.5-5 μn in height.
4. The imaging blanket of claim 3 , wherein said image blanket features formed as pillars in said imaging surface have a circular cross-sectional shape, and are substantially between 1 μm and 4 μm in width, substantially 0.5-2.5 μm in height, and spaced apart from one another substantially by no more than 6 μm.
5. The imaging blanket of claim 1 , wherein said image blanket features include a plurality of recesses.
6. The imaging blanket of claim 1 , wherein said image blanket is configured to be removably disposed on an image forming member of a variable data lithography system.
7. The imaging blanket of claim 1 , wherein said polymer body structure further includes substantially 3-25 percent by weight granular material.
8. The imaging blanket of claim 7 , wherein said granular material comprises carbon.
9. The imaging blanket of claim 1 , wherein said image blanket features formed as pillars in said imaging surface are substantially 2 μm in height.
10. A variable data lithography system, comprising:
an imaging blanket comprising:
a polymer body structure having an arbitrarily reimageable imaging surface,
a repeating pattern of molded image blanket features formed in said arbitrarily reimageable imaging surface, each said feature having a selected cross sectional shape, said pattern of molded image blanket features configured in an image-independent pattern, said molded image blanket features are formed as pillars,
a dampening fluid subsystem for applying a layer of dampening fluid to said arbitrarily reimageable imaging surface;
a patterning subsystem for selectively removing portions of the dampening fluid layer so as to produce a latent image in the dampening fluid;
an inking subsystem for applying ink over the arbitrarily reimageable imaging surface such that said ink selectively occupies regions of the dampening fluid layer where dampening fluid was removed by the patterning subsystem to thereby produce an inked latent image; and
an image transfer subsystem for transferring the inked latent image to a substrate.
11. The variable data lithography system of claim 10 , wherein said image blanket features have a substantially similar cross-sectional shape selected from the group consisting of: squares, octagons, circles, and hexagons.
12. The variable data lithography system of claim 10 , wherein said pillars are substantially 0.5-5 μm in height.
13. The variable data lithography system of claim 12 , wherein said image blanket features formed as pillars in said imaging surface have a circular cross-sectional shape, and are substantially between 1 μm and 4 μm in width, substantially 0.5-2.5 μm in height, and spaced apart from one another substantially by no more than 6 μm.
14. The variable data lithography system of claim 10 , wherein said image blanket features include a plurality of recesses.
15. The variable data lithography system of claim 10 , wherein said image blanket is removably disposed on an image forming member of said variable data lithography system.
16. The variable data lithography system of claim 10 , wherein said polymer body structure comprised of material selected from the group consisting of: fluorosilicone, fluorocarbon-based synthetic rubber, and silicone.
17. The variable data lithography system of claim 10 , wherein said polymer body structure further includes substantially 3-25 percent by weight granular material.
18. The variable data lithography system of claim 17 , wherein said granular material comprises carbon.
19. The variable data lithography system of claim 10 , wherein said image blanket features formed as pillars in said imaging surface are substantially 2 μm in height.