Appeal 2007-2023
Application 10/757,453
6) Nishino discloses that the adhesive layer 11 may be a
polyamide type resin and at least one of a crystalline polyester type
resin and polyester type elastomer (col. 9, ll. 58-61).
7) According to Nishi, inadequate bond strength is a known
problem in the manufacture of two-layer fuel hoses comprising a
fluororesin inner layer and adjacent polyamide outer layer. Nishi
states that this problem is the result of the low adhesive property of
the fluororesin (¶ [0006]).
8) According to Nishi, a known solution to the problem of
interlaminar adhesion is to interpose a layer of an adhesive
between the inner layer of fluororesin and the outer layer of
polyamide resin, thereby forming a three-layer structure (¶ [0007]).
9) According to Nishi, a drawback of the three-layer structure
is that additional processing steps are required (e.g., surface
treating the fluororesin and laminating the adhesive) which leads to
higher costs (¶ [0008]).
10) An object of Nishi’s invention is “to provide a fuel hose
which has a double layer structure excellent in interlaminar
adhesion without using an adhesive” (¶ [0010]).
11) Nishi’s invention is directed to a fuel hose having a two-
layer structure comprising an inner layer made of a fluororesin and
an outer layer adjacent thereto made of a thermoplastic resin other
than a fluororesin (¶ [0011]).
12) Nishi states that the inventive fuel hose “is excellent in
interlaminar adhesive force without using an adhesive and further
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Last modified: September 9, 2013