Appeal No. 1997-4282
Application 08/164,608
void is completely filled with liquid instead of being
partially filled such that liquid can evaporate and condense
(col. 2, lines 28-33).
DE ‘620 discloses a web drying roller which is partially
filled with liquid such that the liquid evaporates and the
vapor is distributed very rapidly and uniformly over the
length of the rollers (pages 4-5).
The examiner argues that it would have been obvious to
one of ordinary skill in the art to replace Carvill’s filled
support member interior void with the partially filled
interior void of DE ‘620 to allow uniform temperature and
heating throughout the support member, thereby minimizing
thermal distortion of the support member (answer, page 5).
DE ‘620, however, says nothing about thermal distortion.
The reference discloses that the support member interior void
is partially filled with liquid to solve a particular problem
encountered when using heated rollers to dry a web, i.e., a
surface temperature at the ends of the heated rollers which is
substantially higher than the temperature in the center of the
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