Appeal No. 2000-2258
Application No. 08/888,759
solid at ordinary temperatures is heat-melted. An image is formed
by spraying droplets of the ink composition in a melted state from
the nozzles of a hot melt type ink jet system onto an image
receiving layer of a hydrophobic, i.e., water-resistive, surface of
a printing plate precursor. The non-image area of the image
receiving layer is then subjected to a desensitizing treatment by a
chemical reaction to form a planographic printing plate.
Appellants assert (specification, page 5) improved results as
compared to a hot-melt type ink-jet system in which a hydrophobic
ink image is formed on a water-receptive image receiving layer.
Claim 5 is illustrative of the invention and reads as follows:
5. A process for preparing an ink-jet system printing plate
comprising:
heat melting an ink composition that is solid at temperatures
of 35/C or lower, spraying droplets of the ink composition in a
heat melted state from a nozzle onto an image receiving layer
containing zinc oxide and a binder resin on a water-resistant
support, the surface of the image receiving layer having a
water-contact angle of 50/ or more, and then
subjecting a nonimage area of the image receiving layer to a
desensitizing treatment by a chemical reaction to prepare a
planographic printing plate.
2
Page: Previous 1 2 3 4 5 6 7 8 9 10 Next
Last modified: November 3, 2007