Appeal No. 1999-1164
Application No. 08/715,559
heat thereby resulting in deposition of thermal byproducts and (b) rubbing the member with
a liquid composition comprising a major proportion by weight of a non-solvent, at least a
portion of the non-solvent providing mechanical lubrication, and a minor proportion by
weight of a solvent for the previously mentioned byproducts.
This appealed subject is adequately illustrated by independent claim 1 which reads
as follows:
1. A method of imaging a lithographic printing member having a layer of an
ink-rejecting material and, disposed thereunder, a layer of an ink-receptive
material, the method comprising the steps of:
a. imaging the printing member by exposing the member to
laser-generated heat in an imagewise pattern to remove or facilitate
removal of the ink-rejecting layer, such exposure resulting in
deposition of thermal byproducts of the ink-rejecting material onto the
ink-receptive layer and generation of thermal byproducts of the
ink-receptive material; and
b. rubbing the printing member with a liquid composition comprising
a major proportion by weight of a non-solvent for the ink-rejecting and
ink-receptive materials, at least a portion of the non-solvent providing
mechanical lubrication, and a minor proportion by weight of a solvent
for byproducts of at least one of the ink-rejecting and ink-receptive
materials.
The references relied upon by the examiner as evidence of obviousness are:
Herrmann et al. (Herrmann) 4,842,988 Jun. 27, 1989
Fuller et al. (Fuller) 5,148,746 Sep. 22, 1992
Leenders 5,378,580 Jan. 03, 1995
Lewis et al. (Lewis) 5,493,971 Feb. 27, 1996
2
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