Appeal No. 1997-3024
Application 08/325,476
particular, the plates 7 are stated in claim 1 to be shaped
and positioned such that
a nearest point [P] of a portion of an upper edge
[71] of said coating width regulation plate[s] [7]
corresponding to said slot [4] with respect to the
support surface [30] is positioned upstream from a
center line [80] of a width [W] of said slot along
the support running direction[,] and an area given
by a product of a distance [T] between the nearest
point [P] and the support surface [30] and the width
[W] of said slot is 1 mm to 6x10 mm .2 -5 2
Looking at Shibata, this reference pertains to an
extrusion coating apparatus and method wherein the coating
solution is discharged from a slot in the coating head under
pressure (column 3, lines 37-39). Shibata’s apparatus
includes a coating head having a front edge 3, a back edge 2,
a coating spouting slot 4 formed between the front and back
edges, and a coating solution pool 6 buried within the coating
head. The solution pool and the slot have openings at both
ends that are closed off by shield boards 5. In addition,
coating regulation width boards 7 are fitted in the slot 4 at
both ends “to resist the flow of the coating solution thereby
to determine the width of a coated layer 21 formed on the web”
(column 3, lines 41-43). Of importance to Shibata is the
relationship between the width B of the coating applying slot
8
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