Appeal No. 2005-2232
Application No. 09/701,587
BACKGROUND
The present invention relates to a process for the production of an
aluminum foil coated with a sealable and sterilizible plastic. (Brief, pp. 2-3).
Representative claim 28, as presented in the brief, appears below:
28. A process for production of an aluminum foil (10) coated with a
sealable and sterilizible plastic (14) based on polypropylene (PP) or
polyethylene (PE), comprising coextruding the plastic (14) with an
adhesion-promotion agent (6) [sic., (16)], to form a coextrudate, combining
the coextendate of plastic (14) and adhesion-promotion agent (16) with an
aluminum foil (24) between two rollers (20,22), the temperature of the
coextruded-coated aluminum foil being such that the temperature at outer
surface of the plastic (14) of the coextrudate of the plastic (14) and the
adhesion-promotion agent (16) lies below the crystallite melt point (TK) of
the plastic (14), then passing continuously the coextruded-coated
aluminum foil (10), to increase the adhesion strength between the
aluminum foil (24) and the plastic coating (14), through an oven (26) with
temperature (To) set so that the temperature at the outer surface of the
plastic (14) of the coextrudate of the plastic (14) and the adhesion-
promotion agent (16) lies above the crystallite melt point (TK) of the plastic
(14), and cooling the coextruded-coated aluminum foil (10) heat-treated in
this way, after emerging from the oven (26), in a shock-like manner such
that the crystalline portion of at least in the outer surface area of the
cooled plastic coating (14) and the crystal grains in this outer surface area
are as small as possible.
In addition to the prior art cited on page 3 of the specification, the Examiner relies
on the following reference in rejecting the appealed claims:
Heyes et al. (Heyes) 5,093,208 Mar. 03, 1992
Takano et al. (Takano) 5,837,360 Nov. 17, 1998
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