Appeal No. 2002-0306
Application No. 08/911,983
b) blowing the film by a hot blown process up to a blow-up
ratio of between 2.0:1 and 3.0:1;
whereby the film has a tear propagation (ASTM D-1938) value
of less than 350 grams in the longitudinal direction, and less
than 500 grams in the transverse direction.
15. The process of claim 14 wherein the core layer
comprises:
a) a first polyamide layer,
b) a second polyamide layer, and
c) a third layer, disposed between the first and second
layers, comprising a polymeric adhesive.
The References
In rejecting the claims under 35 U.S.C. § 103(a), the
examiner relies upon the following references:
Shah 4,724,185 Feb. 09, 1988
Wood et al. (Wood) 5,419,795 May 30, 1995
Walton et al. (Walton) 5,591,390 Jan. 07, 1997
The Rejections
Claims 14 and 15 stand rejected under 35 U.S.C. § 103(a) as
being unpatentable over Wood or Shah in view of Walton.
The Invention
The invention relates to a coextruded easy open tear film
compatible with current commercial packaging systems. The film is
said to have not only easy tear properties, but also good
dimensional stability and abuse resistance. (Appeal Brief, page
8, last three lines). For further aspects of the claimed
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