Appeal 2006-1483
Application 10/159,395
FIG. 4 is a photographic plan view enlarged about 20
times actual size of the fabric side of a prior art, non–layered,
creped paper sheet 60 processed generally in accordance with
the teachings of U.S. Pat. No. 3,301,746, said sheet being
formed from a single, homogeneously mixed slurry containing
approximately 50 percent softwood and 50 percent hardwood
fibers. The sheet as subjected to fluid pressure and thermally
pre-dried on a 26 x22 semi-twill drying/imprinting fabric
prepared as described in the aforementioned patent of Peter G.
Ayers, compacted by the fabric knuckles upon transfer to a
Yankee dryer drum, finally dried, and creped upon removal
from the drum by means of a doctor blade. The finished sheet
contains approximately 16 percent crepe. As shown in FIG.
5, the sheet has the appearance of a lazy corrugation with
only a minor portion of the fibers on the fabric side 60a of
the sheet extending outwardly away from the surface of the
sheet when viewed in the cross-machine direction.
FIG. 6 is a plan view enlarged about the same extent as
FIG. 4 of the fabric side 70a of a layered, creped paper sheet 70
of the present invention produced generally in accordance with
the process illustrated in FIG. 1, said sheet being formed from
two identical slurries of essentially the same fiber content, each
slurry containing approximately 50 percent softwood and 50
percent hardwood fibers in a homogeneous mixture. The basis
weights, processing conditions, drying/imprinting fabric,
and degree of crepe were essentially the same as those of
non-layered prior art sheet shown in FIGS. 4 and 5. As
should be apparent from a comparison of FIGS. 5 and 7, the
fabric side 70a of the layered sheet has a greater proportion
of its fibers deflected outwardly in a direction generally
away from the plane of the sheet. [(Morgan, col. 11, ll. 32-
66) (Emphasis ours).]
Thus, from our perspective, the claimed tissue papers and the tissue papers
produced by Morgan not only appear to be identical or substantially
identical, but also appear to be produced by substantially the same method.
Compare the above teachings in Morgan with Specification at 6, 12-14, and
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