Appeal No. 1996-2811
Application 08/402,670
rail insert bondable to a stainless steel bracket used for
guiding photographic film and paper. As noted on pages 1 and2
2 of appellants’ specification, prior art guide rails for use
in
perforating equipment for photographic film and paper were
made of chrome plated stainless steel or hardened stainless
steel. However, these guide rails suffered from certain
disadvantages, such as a) the edges of the moving film
creating a groove in the
chrome plated steel rails in a relatively short time and b)
the
corrosive silver halide salts in the film attacking the
stainless steel rails creating corrosion products, which
corrosion products along with the wear debris from the
stainless steel rails tended to contaminate the film being
perforated. As noted on page 2 of the specification, the
present invention replaces the chrome plated stainless steel
rails of the prior art with
2In dependent claims 13 through 18, the “ceramic guide rail” set forth in the
preamble of each of these claims appears to lack proper antecedent basis. Independent
claims 10, 11 and 12 are each directed to a ceramic guide rail insert, not a ceramic
guide rail. Likewise, the “guide rail” mentioned in the body of claims 13 through 16
has no proper antecedent basis. The examiner and appellants should correct these
defects during any further prosecution of the application.
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