Lithographic imaging with reduced power requirements

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6168903
SERIAL NO

09245103

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Imaging of lithographic printing plates with reduced fluence requirements is accomplished using printing members that have a solid substrate, gas-producing and radiation-absorptive layers over the substrate, and a topmost layer that contrasts with the substrate in terms of lithographic affinity. Exposure of the radiation-absorptive layer to laser light causes this layer to become intensely hot. This, in turn, activates the gas-producing layer, causing rapid evolution and expansion of gaseous decomposition products. The gases stretch the overlying topmost layer to create a bubble over the exposure region, where the imaging layers have been destroyed. If this process is sufficiently explosive, the neck of the bubble expands beyond the diameter of the incident laser beam, tearing the topmost layer and the underlying imaging layers away from the substrate outside the exposed region. The entire affected area is easily removed during a post-imaging cleaning process, resulting in an image spot larger than the incident beam diameter.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
PRESSTEK, LLC.HUDSON, NH69

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cassidy, Kenneth R Chelmsford, MA 7 283
D'Amato, Richard J South Hadley, MA 9 86
Lewis, Thomas E East Hampstead, NH 77 1475

Cited Art Landscape

Patent Info (Count) # Cites Year
 
MINNESOTA MINING AND MANUFACTURING COMPANY (1)
5460918 Thermal transfer donor and receptor with silicated surface for lithographic printing applications 25 1994
 
GRAHICS TECHNOLOGY INTERNATIONAL, INC. A CORPORATION OF DE (1)
5156938 Ablation-transfer imaging/recording 197 1991
 
AGFA-GEVAERT N.V. (1)
5506085 Thermal imaging element 11 1995
 
3M INNOVATIVE PROPERTIES COMPANY (2)
5308737 Laser propulsion transfer using black metal coated substrates 110 1993
* 5756689 Diazo compounds for laser-induced mass transfer imaging materials 10 1997
 
E. I. DU PONT DE NEMOURS AND COMPANY (1)
5395729 Laser-induced thermal transfer process 36 1993
 
PRESSTEK, INC. (4)
* 5339737 Lithographic printing plates for use with laser-discharge imaging apparatus 161 1993
* 5353705 Lithographic printing members having secondary ablation layers for use with laser-discharge imaging apparatus 71 1993
5819661 Method and apparatus for laser imaging of lithographic printing members by thermal non-ablative transfer 32 1995
* 5704291 Lithographic printing members with deformable cushioning layers 21 1996
 
AUTOTYPE INTERNATIONAL LIMITED (1)
4588674 Laser imaging materials comprising carbon black in overlayer 85 1983
 
Konica Corporation (1)
5238778 Method of forming printing plates by heat transfer 43 1991
 
PGI GRAPHICS IMAGING LLC (1)
5171650 Ablation-transfer imaging/recording 231 1991
 
IMPERIAL CHEMICAL INDUSTRIES PLC (1)
4711834 Laser-imageable assembly and process for production thereof 38 1985
 
PRESSTEK, LLC. (3)
* 5822345 Diode-pumped laser system and method 15 1996
* 5783364 Thin-film imaging recording constructions incorporating metallic inorganic layers and optical interference structures 21 1996
* 5786129 Laser-imageable recording constructions utilizing controlled, self-propagating exothermic chemical reaction mechanisms 24 1997
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
FUJIFILM CORPORATION (1)
* 6391522 Offset printing plate precursor and method for offset printing using the same 4 1999
 
EASTMAN KODAK COMPANY (1)
* 2013/0036,929 METHOD FOR OFFSET MEDIA SYSTEM 0 2011
 
PRESSTEK, INC. (3)
* 6378432 Lithographic imaging with metal-based, non-ablative wet printing members 8 2000
* 6374738 Lithographic imaging with non-ablative wet printing members 14 2000
* 6626108 Lithographic imaging with metal-based, non-ablative wet printing members 0 2002
 
W.A. WHITNEY CO. (1)
* 6246025 Insulated slag collection bed for a laser-equipped machine tool 2 1999
 
TOKYO ELECTRON LIMITED (1)
7661544 Semiconductor wafer boat for batch processing 4 2007
* Cited By Examiner