Appeal No. 2000-2229
Application No. 09/126,766
therewith is not disclosed as having a coating. To overcome
these deficiencies, the examiner turns to Ohmori and Schriber.
Ohmori pertains to rotary drum shears comprising a pair of
drums each having a knife mounted on its periphery. The drums
rotate in opposite directions and the knives cooperate to cut a
web of material such as corrugated cardboard. Ohmori teaches
that spiral or helical knives are superior to straight knives in
that they exert a reduced cutting load on the drums (see column
1, lines 7 through 60).
Schriber teaches that the anvil cylinder of a rotary cutter
“may be provided with a hardened surface, or insert, or in some
cases a die, to cooperate with the sharpened edge of the knife in
severing the passing web as the web moves between the rotating
knife cylinder and anvil or back-up cylinder” (column 1, lines 12
through 16).
In proposing to combine Steidinger, Ohmori and Schriber to
reject claim 8, the examiner concludes that it would have been
obvious to one of ordinary skill in the art “to provide the
invention of Steidinger with a helical knife as disclosed by
Ohmori for the purpose of reducing the cutting load, and a
hardened anvil surface as disclosed by Schriber for the purpose
of providing accurate seating between the knife cylinder and the
anvil cylinder” (final rejection, page 3).
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