Appeal 2007-0061
Application 09/531,978
I. BACKGROUND
The invention relates to labelstock including biaxially oriented
multilayer film and an adhesive layer from which labels are die-cut.
Biaxially stretch orienting the film increases its tensile modulus in both the
machine direction (MD) and the cross direction (CD) (Specification 20:20-
23). In the embodiments which are the focus of the claims, Appellants
biaxially stretch the film so that the tensile modulus in the CD remains less
than 150,000 psi, but the tensile modulus in the MD is higher than in the CD
(Specification 21:1-15). The orientation due to stretching in the MD is
greater than the orientation in the CD by at least about 10% (Specification
19:7-12). Claims 56 and 85 are illustrative of the subject matter on appeal:
56. An adhesive containing labelstock for use in adhesive labels
which comprises
(A) a die-cuttable, biaxially oriented multilayer film
comprising
(A-1) a base layer having an upper surface and a lower
surface, and comprising polyethylene having a density of about 0.940 g/cm3
or less, a propylene polymer or copolymer, or mixtures thereof wherein the
base layer is free of copolymers of ethylene with an ethylenically
unsaturated carboxylic acid or ester, and
(A-2) a first skin layer of a thermoplastic polymer
bonded to the upper surface of the base layer, wherein the tensile modulus of
the multilayer film in the machine direction is greater than the tensile
modulus in the cross direction, and the tensile modulus of the multilayer film
in the cross direction is 150,000 psi or less, and
(B) an adhesive layer having an upper surface and a lower
surface wherein the upper surface of the adhesive layer is adhesively joined
to the lower surface of the base layer.
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