Appeal No. 1997-3024
Application 08/325,476
Appellants’ invention pertains to coating equipment
comprising an extrusion type coating head for applying a
coating fluid to the surface of a continuously running support
web (claims 1-5 and 17-20), and to a process of applying a
coating fluid to the surface of a continuously running support
web (claims 6-16). As explained in the “Description of the
Related Art” section of appellants’ specification, it is known
to use an extrusion type coating head to apply a coating to a
continuously running web. In a known process, coating fluid
is applied to the web surface in a so-called “non-pressurized”
condition. As explained on pages 2-3 of appellants’1
specification and as illustrated in Figure 12, in this known
process, air may enter into the coating head at the
application point of the coating fluid to cause a phenomenon
known as “film cut” wherein the coating fluid 36 separates
from a precoating layer 35 previously applied to the web 30 at
the side edges of the coating. It is an objective of
appellants’ invention to effectively lessen the effect of air
entering at the application point of the coating fluid to
1We understand this to mean that the coating fluid is
supplied to the web surface at substantially ambient pressure.
2
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