Appeal No. 1997-3520
Application No. 08/357,487
1. A heat-shrinkable film comprising:
a) a core layer comprising an ethylene-vinyl alcohol
copolymer;
b) two outer layers comprising a blend of ethylene-vinyl
acetate copolymer and ethylene-"-olefin copolymer; and
c) two adhesive layers,
wherein said film has
i) a free shrink of at least 40% in both directions
at 120EC and
ii) a maximum shrink force in the transverse
direction, throughout its range of shrink
temperatures, not exceeding 0.5 N/cm.
The examiner relies upon the following references as
evidence of obviousness:
Bornstein et al. (Bornstein) 4,064,296 Dec. 20, 1977
Newsome (Newsome '960) 4,457,960 Jul. 3, 1984
Newsome (Newsome '897) 0,092,897 Feb. 11, 1983
(European patent application)
Appellants' claimed invention is directed to a heat-
shrinkable film comprising a copolymeric core layer, and two
adhesive layers bonding the core layer to two outer layers of
a blend of copolymers. The film has a free shrink of at least
40% in both directions at 120EC and a maximum shrink force in
the transverse direction that does not exceed 0.5 N/cm.
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