Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making printing plates
Reexamination Certificate
2005-08-09
2005-08-09
Walke, Amanda (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Making printing plates
C430S270100
Reexamination Certificate
active
06927014
ABSTRACT:
A method for producing a digital screen printing blank usable in a screen printing process, directly from digital information in the computer, in an economical fashion. In a preferred embodiment, a screen (28) is provided with a photosensitive layer (38), and a digitally determined image from a computer is printed on the screen by means of an inkjet printer. Preferably, a flat bed ink-jet imaging system is used so that the screen can be stretched in a frame and directly placed under the ink-jet head (44). The ink (46) used need not have strong colorant, but functions as a UV mask and thus must contain a UV absorbing pigment. The ink is not absorbed into the photosensitive layer, but remains as an undried image (56) on the surface. The ink must remain wet so that it does not spread and therefore gives a sharp image, and so that the UV absorbent material remains concentrated. The solvent of the ink must be chosen so as to assure that it will not affect the screen. The screen is then irradiated with UV, and the areas which have been printed with ink serve to mask the photosensitive layer from the UV light, while those areas having no ink are exposed so that the photosensitive layer is polymerized by the UV. After the UV irradiation stage, the screen is washed so as to remove the ink and the unpolymerized photosensitive layer. Any liquid that is suitable for washing out the unpolymerized photosensitive layer will also wash away the ink. This leaves the screen with only the polymerized areas of the photosensitive layer that create the blocked areas through which the ink will not pass. Thus, the inventive method provides a digitally imaged screen, directly from a digital image in the computer, which can then be used in any conventional screen printing process.
REFERENCES:
patent: 5878662 (1999-03-01), McCue
patent: 6341856 (2002-01-01), Thompson et al.
patent: 6358668 (2002-03-01), Leenders et al.
patent: 0492351 (1992-07-01), None
patent: 2315076 (1998-01-01), None
patent: WO 97/25206 (1997-07-01), None
patent: WO 98/51750 (1998-11-01), None
Creo Il Ltd.
Langer, Pat. Atty. Edward
Shiboleth, Yisraeli, Robets, Zisman & Co.
Walke Amanda
LandOfFree
Method for producing a digitally imaged screen for use in a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for producing a digitally imaged screen for use in a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing a digitally imaged screen for use in a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3519580