Appeal No. 1997-4428
Application 08/259,634
blanket cylinder with a protective coating since the cylinder
is in
contact with aggressive chemicals. Kobler discloses that
typical coatings are nickel, chromium, and alloys as well as
electrically non-conductive materials, such as ceramic, Teflon
or silicone. Kobler states that it has been found that a
coating on the rubber blanket cylinder which is electrically
non-conductive or only poorly conductive causes in due course
damage to the surface of the cylinder. In col. 1, lines 45
through 56, Kobler states that it appears that the damage to
the cylinder may be due to electrostatic charge which will
build up on the blanket and which cannot be conducted away
from the surface of the cylinder if the surface is non-
conductive or electrically only poorly conductive. In col. 2,
lines 10 through 21, Kobler teaches that the figure shows a
rubber blanket cylinder C having a surface 1 which is coated
with a protective coating 3 of electrically non-conductive or
only semiconductive material, which is applied in order to
protect the surface of the cylinder 1 from attack by corrosive
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